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Clean Air & Sustainable Mobility

Delhi's AQI improves but remains in 'very poor' category; Kolkata, Mumbai report 'moderate' air

Strong winds lowered pollution levels marginally and the 24-hourly average air quality index stood at 372 on Wednesday. News Stubble burning accounted for 27 per cent of the air pollution in the capital. According to SAFAR, Mumbai's overall AQI was 162 on Thursday morning. Kolkata's air quality also remained in the "moderate" category on Thursday morning. Delhi's air quality remained in the "very poor" zone on Thursday morning with an overall Air Quality Index (AQI) at 360, as per the System of Air Quality and Weather Forecasting And Research (SAFAR) data. On Wednesday, the air quality of the national capital was in the 'very poor' category with AQI standing at 382, showing marginal improvement. It was in the 'very poor' category on Tuesday as well. Delhi recorded a minimum temperature of 13.4 degrees Celsius, the lowest this season so far, on Wednesday and it is likely to dip to 11 degrees Celsius in a week, according to the India Meteorological Department. Also Read - Delhi does little to help homeless in long run: Unvaccinated, jobless migrant workers struggle to feed families Strong winds lowered pollution levels marginally and the 24-hourly average air quality index stood at 372 on Wednesday. The air quality in the city and its neighbouring areas is predicted to worsen in the next two days. Stubble burning accounted for 27 per cent of the air pollution in the capital. An AQI between zero and 50 is considered good, 51 and 100 satisfactory, 101 and 200 moderate, 201 and 300 poor, 301 and 400 very poor, and 401 and 500 severe. Also Read - Agri supply chain in Tamil Nadu thrown off gear by the recent bout of rains According to SAFAR, Mumbai's overall AQI was 162 on Thursday morning and Pune recorded an AQI of 128. Chennai's air quality remained in the "satisfactory" category on Thursday morning, with AQI at 73. Kolkata's air quality also remained in the "moderate" category on Thursday morning with an overall AQI at 184. Meanwhile, the green think-tank Centre for Science and Environment (CSE) said the first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days Also Read - Ashok Gehlot meets Sonia Gandhi in Delhi to discuss Rajasthan cabinet reshuffle Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in the last four years, it said. Compared to the first smog episode of the previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 – both lasting six days. If conditions don't improve, it might overtake the 2019 smog that lasted eight days, the CSE said. Also Read - Maha: 89 per cent eligible population in Raigad covered with first dose of COVID-19 vaccine The average intensity of the smog this year so far is 329 micrograms per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year's smog for a longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said. "While very high concentrations of PM2.5 have hogged attention, the levels of gases – ozone, CO or NO2 -- have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017," said Avikal Somvanshi, programme manager, Urban Lab, CSE. This analysis is based on the real-time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain. "On an average, the contribution of smoke to Delhi's daily PM2.5 during the middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR)," the CSE said. "If converted to absolute concentrations, the per day contribution of smoke stood at 26 micrograms per cubic metre this year so far compared to 35 micrograms per cubic metre in 2020, 40 micrograms per cubic metre in 2019, and 31 micrograms per cubic metre in 2018," it said. However, the peak contribution of smoke to Delhi's PM level was recorded on 7th November when it hit 48 per cent. This is the second-highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018. The highest single-day contribution percentage has been 58 per cent recorded on November 5, 2018. https://www.news9live.com/india/delhi-air-quality-improves-but-remains-in-very-poor-category-kolkata-mumbai-report-moderate-aqi-132755

Clean Air & Sustainable Mobility

Delhi in grip of season’s longest smog episode in 4 yrs, says report

The Center for Science and Environment (CSE) said on Wednesday that the first episode of severe fog hit Delhi and the National Capital Region (NCR) and is expected to continue for another two days. Although seasonal smog in Delhi is severe, the average daily contribution of smoke from farm fires from mid-October to 8 November was the lowest in the past four years. As expected, the first episode of the season was triggered by the combined effect of unfavorable weather conditions (cold, calm winds and inversion), burning hay and firecrackers. Compared to the first episode of smog in the past four years, the current smog matches the duration of the first smog of the 2018 and 2020 season – both of which lasted six days. And if conditions do not improve, the CSE said, it could exceed 2019’s eight-day smog The average smog density so far this year has been 329 micrograms per cubic meter per day, which is lower than the intensity of 2020 smog (up 7 percent) and 2019 smog (up 3 percent). It is more intense than the smog of 2018 (about 9 percent). The Green Research Center said that this year’s smog persistence for longer despite relatively severe local conditions may be due to a lack of pollution control measures in the city. “While very high concentrations of PM2.5 have attracted attention, levels of gases – ozone, carbon dioxide or nitrogen dioxide – remained high during the smog episode. Also, the ratio of SO2 to NO2 increased on the night of Diwali indicating an Increasing pollution load from fireworks.Avikal Somvanshi, program manager at Urban Lab, CSE, said the concentration of PM2.5 on Diwali night (from 8 p.m. to 8 a.m.) was the most intense since 2017. Converted to absolute concentrations, the daily contribution of smoke is 26 micrograms per cubic meter this year so far compared to 35 micrograms per cubic meter in 2020, 40 micrograms per cubic meter in 2019, and 31 micrograms per cubic meter in 2018, “he said However, the peak smoke contribution to the PM level was recorded in Delhi on November 7 when it reached 48 per cent. This is the second highest daily contribution percentage recorded since Saffar began this recognition in 2018. The highest one-day contribution rate was 58% on November 5, 2018. “The persistent phenomenon of smog is a public health emergency. This requires urgent emergency action on major combustion sources (vehicles, industry, waste incineration) and dust sources (construction and roads) to prevent further pollution trapping when there is no wind to blow them away. We Need to work out in terms of pollution source and hotspot.”

Clean Air & Sustainable Mobility

Pollution: First severe smog spell of season in Delhi, could be longest in 4 yrs

Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires has been the lowest in last four years: CSE The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said on Wednesday. Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said. "Predictably, the season's first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers," said Anumita Roychowdhury, executive director, research and advocacy, CSE. Also watch: Delhi pollution: air quality continues to remain in severe category Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season -- both lasted six days. If conditions don't improve, it might overtake the 2019 smog that lasted eight days, the CSE said. The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year's smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said.

Clean Air & Sustainable Mobility

Delhi air pollution: AQI improves to enter very poor zone

Delhi’s air high quality improved marginally to succeed in the ‘very poor’ class on Wednesday because the capital recorded an total air high quality index (AQI) of 372 – a drop from Tuesday’s 404, knowledge from the Central Air pollution Management Board (CPCB) confirmed. Based on specialists, although native meteorological situations largely remained the identical, a slight drop within the velocity of wind that’s bringing stubble emissions to Delhi has led to this slight enchancment within the final 24 hours. Forecasts on Wednesday confirmed transport-level winds will as soon as once more decide up from Thursday onwards, with two days of ‘extreme’ air a chance as soon as once more. Based on the System of Air High quality and Climate Forecasting And Analysis (Safar), winds that transport stubble emissions from Punjab and Haryana to Delhi, are anticipated to select up once more over the subsequent two days. This more likely to deteriorate over the subsequent two days. Although the variety of farm fireplace incidents went as much as 5,317 on Wednesday from 3,476 on Tuesday, their share within the total air pollution mixture of Delhi stayed at 27%. Gufran Beig, founder and mission director at Safar, says a mixture of robust transport-level winds, together with calm wind velocity over Delhi is more likely to see ‘extreme’ air once more. “If the farm fires stay the identical, the share of stubble burning will begin growing once more from Thursday as winds from Punjab and Haryana will decide up velocity. In the meantime, Delhi will see calm wind situations, which can assist lure pollution over town,” he stated. In an evaluation finished by the Middle for Science and Setting (CSE) on Wednesday, the physique stated this smog episode is predicted to final one other two days, with it already matching the primary smog episodes of 2018 and 2020 – every of which lasted six days . “Whereas very excessive concentrations of PM2.5 have hogged consideration, the degrees of gases – ozone, CO or NO2 — have additionally remained elevated throughout this smog episode,” says Avikal Somvanshi, program supervisor, City Lab, CSE, including that if situations don’t enhance, this smog episode is more likely to overtake the 2019 smog episode, which lasted eight days. Delhi recorded a minimal temperature of 13.4 levels Celsius on Wednesday, the bottom to date this season. It was 13.5 levels on Tuesday. “A gradual drop in minimal temperature is predicted over the subsequent seven days, touching 11 levels Celsius by November 16,” a met official stated.

Clean Air & Sustainable Mobility

Centre For Science And Environment

The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said today. Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said. “Predictably, the season’s first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers,” said Anumita Roychowdhury, executive director, research and advocacy, CSE. Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season — both lasted six days. If conditions don’t improve, it might overtake the 2019 smog that lasted eight days, the CSE said. The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year’s smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said. “While very high concentrations of PM2.5 have hogged attention, the levels of gases – ozone, CO or NO2 — have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017,” said Avikal Somvanshi, programme manager, Urban Lab, CSE. This analysis is based on the real time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain. “On an average, contribution of smoke to Delhi’s daily PM2.5 during middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR),” the CSE said. “If converted to absolute concentrations, the per day contribution of smoke stood at 26 microgram per cubic metre this year so far compared to 35 microgram per cubic metre in 2020, 40 microgram per cubic metre in 2019, and 31 microgram per cubic metre in 2018,” it said. However, the peak contribution of smoke to Delhi’s PM level was recorded on 7th November when it hit 48 per cent. This the second highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018. The highest single day contribution percentage has been 58 per cent recorded on November 5, 2018.

Clean Air & Sustainable Mobility

Delhi Weather and Pollution Today: ਦਿੱਲੀ 'ਚ ਡਿੱਗਿਆ ਪਾਰਾ, ਇਸ ਹਫਤੇ ਵਧੇਗੀ ਠੰਢ, ਜਾਣੋ ਮੌਸਮ ਵਿਭਾਗ ਦਾ ਹਾਲ

ਦਿੱਲੀ ਵਿੱਚ ਮੌਸਮੀ ਧੁੰਦ ਸੰਘਣੀ ਹੈ ਪਰ ਅੱਧ ਅਕਤੂਬਰ ਤੋਂ 8 ਨਵੰਬਰ ਤੱਕ ਪਰਾਲੀ ਸਾੜਨ ਦਾ ਔਸਤ ਰੋਜ਼ਾਨਾ ਯੋਗਦਾਨ ਪਿਛਲੇ ਚਾਰ ਸਾਲਾਂ ਵਿੱਚ ਸਭ ਤੋਂ ਘੱਟ ਰਿਹਾ ਹੈ। Delhi Weather and Pollution Today: ਇਸ ਸਰਦੀਆਂ ਦੇ ਮੌਸਮ ਦਾ ਘੱਟੋ-ਘੱਟ ਤਾਪਮਾਨ ਬੁੱਧਵਾਰ ਨੂੰ ਦਿੱਲੀ ਵਿੱਚ ਸਭ ਤੋਂ ਘੱਟ ਸੀ। ਮੌਸਮ ਵਿਭਾਗ ਮੁਤਾਬਕ ਵੱਧ ਤੋਂ ਵੱਧ ਤਾਪਮਾਨ 29.6 ਡਿਗਰੀ ਸੈਲਸੀਅਸ, ਜਦੋਂ ਕਿ ਘੱਟੋ-ਘੱਟ ਤਾਪਮਾਨ 13.4 ਡਿਗਰੀ ਸੈਲਸੀਅਸ ਰਿਹਾ। ਦੂਜੇ ਪਾਸੇ ਜੇਕਰ ਵੀਰਵਾਰ ਦੀ ਗੱਲ ਕਰੀਏ ਤਾਂ ਵੱਧ ਤੋਂ ਵੱਧ ਤਾਪਮਾਨ 28 ਡਿਗਰੀ ਸੈਲਸੀਅਸ ਅਤੇ ਘੱਟੋ-ਘੱਟ ਤਾਪਮਾਨ 13 ਡਿਗਰੀ ਸੈਲਸੀਅਸ ਰਹਿਣ ਦੀ ਸੰਭਾਵਨਾ ਹੈ। ਇਸ ਤੋਂ ਇਹ ਅੰਦਾਜ਼ਾ ਲਗਾਇਆ ਜਾ ਸਕਦਾ ਹੈ ਕਿ ਬੁੱਧਵਾਰ ਦੇ ਮੁਕਾਬਲੇ ਵੱਧ ਤੋਂ ਵੱਧ ਅਤੇ ਘੱਟੋ-ਘੱਟ ਤਾਪਮਾਨ ਵਿੱਚ ਹੋਰ ਗਿਰਾਵਟ ਆਵੇਗੀ। ਨਵੰਬਰ ਦੇ ਅੰਤ ਤੱਕ ਦਿੱਲੀ ਵਿੱਚ ਸ਼ੀਤ ਲਹਿਰ ਸ਼ੁਰੂ ਹੋਣ ਦੀ ਸੰਭਾਵਨਾ ਹੈ। ਇਸ ਦੇ ਨਾਲ ਹੀ ਤਾਪਮਾਨ 'ਚ ਗਿਰਾਵਟ ਕਾਰਨ ਦਿੱਲੀ 'ਚ ਠੰਢ ਵਧੇਗੀ। ਮੌਸਮ ਵਿਭਾਗ ਮੁਤਾਬਕ ਦਿੱਲੀ 'ਚ ਧੁੰਦ ਛਾਈ ਰਹੇਗੀ। ਹਵਾ ਵਿੱਚ ਨਮੀ ਦਾ ਪੱਧਰ ਉੱਚਾ ਹੋਣ ਕਾਰਨ ਸਵੇਰੇ ਹਲਕੀ ਧੁੰਦ ਛਾਈ ਰਹੇਗੀ। ਜਿਸ ਕਾਰਨ ਵਿਜ਼ੀਬਿਲਟੀ ਘੱਟ ਹੋਵੇਗੀ। VDO.AI ਮੌਸਮ ਵਿਭਾਗ ਮੁਤਾਬਕ ਇਸ ਹਫਤੇ ਜ਼ਿਆਦਾਤਰ ਮੌਸਮ ਸਾਫ ਅਤੇ ਧੁੱਪ ਵਾਲਾ ਰਹੇਗਾ। ਹਾਲਾਂਕਿ, ਉੱਤਰੀ ਖੇਤਰ ਤੋਂ ਆਉਣ ਵਾਲੀਆਂ ਹਲਕੀ ਠੰਢੀਆਂ ਹਵਾਵਾਂ ਕਾਰਨ ਵੱਧ ਤੋਂ ਵੱਧ ਅਤੇ ਘੱਟੋ-ਘੱਟ ਤਾਪਮਾਨ ਵਿੱਚ ਕਮੀ ਆਵੇਗੀ। ਦਿੱਲੀ ਵਿੱਚ ਸੂਰਜ ਚੜ੍ਹਨ 06:40 ਵਜੇ ਹੋਇਆ ਜਦੋਂ ਕਿ ਸੂਰਜ ਡੁੱਬਣ ਦਾ ਸਮਾਂ 17:29 ਵਜੇ ਹੋਵੇਗਾ। ਬੁੱਧਵਾਰ ਨੂੰ ਤੇਜ਼ ਹਵਾਵਾਂ ਕਾਰਨ ਪ੍ਰਦੂਸ਼ਣ ਦੇ ਪੱਧਰ 'ਚ ਮਾਮੂਲੀ ਕਮੀ ਆਈ ਸੀ ਪਰ ਵੀਰਵਾਰ ਨੂੰ ਹਵਾ ਗੁਣਵੱਤਾ ਸੂਚਕ ਅੰਕ ਇੱਕ ਵਾਰ ਫਿਰ ਵਧਿਆ ਹੈ ਅਤੇ AQI 402 ਤੱਕ ਪਹੁੰਚ ਗਿਆ ਹੈ, ਜਿਸ ਨੂੰ ਗੰਭੀਰ ਮੰਨਿਆ ਜਾ ਰਿਹਾ ਹੈ। ਇਸ ਦੇ ਨਾਲ ਹੀ PM 2.5 ਆਪਣੇ ਮਿਆਰ ਤੋਂ ਉੱਪਰ 298.8 ਕਿਊਬਿਕ ਮੀਟਰ 'ਤੇ ਹੈ। ਅਗਲੇ ਦੋ ਦਿਨਾਂ ਵਿੱਚ ਹਵਾ ਦੀ ਗੁਣਵੱਤਾ ਹੋਰ ਵਿਗੜ ਜਾਵੇਗੀ ਅਤੇ 13 ਨਵੰਬਰ ਨੂੰ ਇਸ ਵਿੱਚ ਸੁਧਾਰ ਹੋਵੇਗਾ। ਦੱਸ ਦੇਈਏ ਕਿ 0 ਅਤੇ 50 ਦੇ ਵਿਚਕਾਰ AQI 'ਚੰਗਾ', 51 ਅਤੇ 100 ਦੇ ਵਿਚਕਾਰ 'ਤਸੱਲੀਬਖਸ਼', 101 ਅਤੇ 200 ਦੇ ਵਿਚਕਾਰ 'ਦਰਮਿਆਨ', 201 ਅਤੇ 300 ਦੇ ਵਿਚਕਾਰ 'ਮਾੜਾ', 301 ਅਤੇ 400 ਵਿਚਕਾਰ 'ਬਹੁਤ ਖ਼ਰਾਬ' ਅਤੇ 401 ਅਤੇ 500 ਦੇ ਵਿਚਕਾਰ ਨੂੰ 'ਗੰਭੀਰ' ਸੀਮਾ ਵਿੱਚ ਮੰਨਿਆ ਜਾਂਦਾ ਹੈ। ਦੂਜੇ ਪਾਸੇ, ਸੈਂਟਰ ਫਾਰ ਸਾਇੰਸ ਐਂਡ ਐਨਵਾਇਰਮੈਂਟ ਮੁਤਾਬਕ ਸੀਜ਼ਨ ਦੀ ਪਹਿਲੀ ਸੰਘਣੀ ਧੁੰਦ ਨੇ ਦਿੱਲੀ-ਐਨਸੀਆਰ ਨੂੰ ਢੱਕ ਲਿਆ ਅਤੇ ਇਹ ਦੋ ਦਿਨ ਹੋਰ ਰਹਿਣ ਦੀ ਸੰਭਾਵਨਾ ਹੈ। ਹਾਲਾਂਕਿ ਦਿੱਲੀ ਵਿੱਚ ਮੌਸਮੀ ਧੁੰਦ ਸੰਘਣੀ ਹੈ, ਪਰ ਅੱਧ ਅਕਤੂਬਰ ਤੋਂ 8 ਨਵੰਬਰ ਤੱਕ ਪਰਾਲੀ ਸਾੜਨ ਦਾ ਔਸਤ ਰੋਜ਼ਾਨਾ ਯੋਗਦਾਨ ਪਿਛਲੇ ਚਾਰ ਸਾਲਾਂ ਵਿੱਚ ਸਭ ਤੋਂ ਘੱਟ ਰਿਹਾ ਹੈ। CSE ਨੇ ਕਿਹਾ ਕਿ ਪਿਛਲੇ ਚਾਰ ਸਾਲਾਂ ਦੀ ਧੁੰਦ ਦੀ ਪਹਿਲੀ ਘਟਨਾ ਦੀ ਤੁਲਨਾ ਕਰਦੇ ਹੋਏ, ਮੌਜੂਦਾ ਧੁੰਦ 2018 ਅਤੇ 2020 ਦੇ ਪਹਿਲੇ ਧੁੰਦ ਦੀ ਮਿਆਦ ਨਾਲ ਮੇਲ ਖਾਂਦੀ ਹੈ ਜੋ ਛੇ ਦਿਨਾਂ ਤੱਕ ਚੱਲੀ ਸੀ। ਜੇਕਰ ਹਾਲਾਤ ਨਾ ਸੁਧਰੇ ਤਾਂ ਇਹ 2019 ਦੇ ਧੁੰਦ ਤੋਂ ਵੀ ਵੱਧ ਸਮਾਂ ਰਹਿ ਸਕਦਾ ਹੈ ਜੋ ਅੱਠ ਦਿਨਾਂ ਤੱਕ ਚੱਲਿਆ ਸੀ। CSE ਨੇ ਕਿਹਾ, "ਅਕਤੂਬਰ ਤੋਂ 8 ਨਵੰਬਰ ਦੇ ਦੌਰਾਨ ਦਿੱਲੀ ਦੇ ਔਸਤ ਰੋਜ਼ਾਨਾ PM2.5 ਵਿੱਚ ਧੂੰਏਂ ਦਾ ਯੋਗਦਾਨ ਪਿਛਲੇ ਚਾਰ ਸਾਲਾਂ ਵਿੱਚ ਸਭ ਤੋਂ ਘੱਟ ਰਿਹਾ ਹੈ। ਹੁਣ ਤੱਕ ਇਹ ਔਸਤਨ 12 ਫੀਸਦੀ ਪ੍ਰਤੀ ਦਿਨ ਦਰਜ ਕੀਤਾ ਗਿਆ ਹੈ ਜਦੋਂ ਕਿ ਪਿਛਲੇ ਸਾਲ 17 ਫੀਸਦੀ, 2019 ਵਿੱਚ 14 ਫੀਸਦੀ ਅਤੇ 2018 ਵਿੱਚ 16 ਫੀਸਦੀ ਸੀ।

Clean Air & Sustainable Mobility

CSE’s new assessment says that the first smog episode of the season has knocked in Delhi-NCR

Adverse weather conditions, farm fires and Diwali crackers have triggered the first episode, with the contribution of farm fires being the lowest in the last four years. A deeper analysis dispels the myth that winter pollution is only a particulate problem – it is also a harmful cocktail of toxic gases including ozone, carbon monoxide, nitrogen dioxide and sulfur dioxide. The concentration of 5 on Diwali night (8 pm to 8 pm) has been the highest since 2017, while the proportion of sulfur dioxide and nitrogen oxide has been high, indicating the effect of crackers. The current severe smog episode requires immediate emergency measures in all areas to prevent further pollution and worsening of the situation, while a long-term strategy needs to be implemented immediately. New Delhi, November 10, 2021: The first severe smog episode has reached Delhi and the National Capital Region (NCR) and is expected to last for the next two days. A new analysis by the Center for Science and Environment (CSE) shows that smog has engulfed the entire Indo-Gangetic plain. The region is in the grip of a public health emergency and urgent and drastic measures are needed to reduce the pollution peak. “Predictably, the first episode of the season has started with a combined effect of unfavorable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers. But even though the seasonal haze in Delhi is intense, from mid-October to November 8, The average daily contribution of farm stubble smoke to 2021 has been the lowest in the past four years. But since November 6, its contribution has risen to 48 per cent on November 7, and is still high,” the permission said. Roychowdhury, executive director, research and advocacy, CSE. “While very high concentrations of PM2.5 have attracted attention, levels of gases – ozone, CO or NO2 – remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night , which reflects the rising pollution load from crackers. The concentration of PM2.5 on Diwali night (8 pm to 8 am) has been the highest since 2017,” said Avikal Somvanshi, Program Manager, Urban Lab, CSE it is said. The analysis is based on real-time data available from currently operational air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic plain. For this analysis, a large amount of data points have been cleaned and data gaps have been addressed based on the USEPA method. The analysis covers 156 Continuous Ambient Air Quality Monitoring Stations (CAAQMS) spread across 67 cities in Punjab, Chandigarh, Haryana, Delhi, Rajasthan, Uttar Pradesh, Bihar and West Bengal. The meteorological data for analysis has been taken from the Palam Meteorological Center of the India Meteorological Department (IMD). Fire count data were obtained from NASA’s Fire Information for Resource Management System, specifically, using the Visible Infrared Imaging Radiometer Suite (VIIRS) product. The contribution of farm stubble smoke to Delhi’s air quality has been estimated from the System of Air Quality and Weather Forecasting and Research (SAFAR) of the Ministry of Earth Sciences. First smog of the season: PM2.5 concentration in Delhi exceeded 250 micrograms per cubic meter (ug/m3) (breakpoint for severe AQI category) on November 4 and continues to hover above it seven days later. Its maximum concentration was 501 ug/m3 on 5 November, then gradually decreased to 256 ug/m3 on 8 November. Since then, it has started climbing again and stood at 264 ug/m3 on 9 November. Hourly levels are rising again on 10th November (checked by 10am) and if weather conditions do not improve, 10th November could also exceed the 24-hour average of 250 ug/m3. It is to be noted that the CSE evaluation is based on monitoring in Delhi alone and the daily average is assumed from midnight to midnight, which is different from the methodology of CPCB. The CPCB uses the GRAP for its trend counter, uses the average of all stations in Delhi and NCR cities, while the CPCB uses the AQI bulletin from 4 pm to 4 pm as a measure of its daily value. Is. Compared to the first smog episode of the previous four years, the current smog corresponds to the first smog period of the 2018 and 2020 seasons – both lasting six days. If the situation does not improve, it may overtake the eight-day smog of 2019.

Clean Air & Sustainable Mobility

Centre For Science And Environment

The average intensity of the smog in Delhi so far is 329 microgram per cubic metre per day.New Delhi: The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said today.Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said.”Predictably, the season’s first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers,” said Anumita Roychowdhury, executive director, research and advocacy, CSE.Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season — both lasted six days. If conditions don’t improve, it might overtake the 2019 smog that lasted eight days, the CSE said.The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent).Lingering on of this year’s smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said.”While very high concentrations of PM2.5 have hogged attention, the levels of gases – ozone, CO or NO2 — have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017,” said Avikal Somvanshi, programme manager, Urban Lab, CSE.This analysis is based on the real time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain.”On an average, contribution of smoke to Delhi’s daily PM2.5 during middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR),” the CSE said.”If converted to absolute concentrations, the per day contribution of smoke stood at 26 microgram per cubic metre this year so far compared to 35 microgram per cubic metre in 2020, 40 microgram per cubic metre in 2019, and 31 microgram per cubic metre in 2018,” it said.However, the peak contribution of smoke to Delhi’s PM level was recorded on 7th November when it hit 48 per cent.This the second highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018.The highest single day contribution percentage has been 58 per cent recorded on November 5, 2018.(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

Clean Air & Sustainable Mobility

CSE forecast – Delhi’s first dense haze of weather, may remain for the longest time in four years

Haze in Delhi: The first dense smog of the season has covered Delhi and the National Capital Region. This smog is likely to engulf Delhi and surrounding areas for the next two days. The Center for Science and Environment (CSE) has given this information regarding smog in Delhi. According to the report, the seasonal smog in Delhi is dense, but the average daily contribution of stubble burning from mid-October to November 8 has been the lowest in the last four years. Contribution of smoke to smog lowest in last four years CSE said, “The contribution of smoke to the average daily PM 2.5 of Delhi during October to November 8 has been the lowest in the last four years. So far it has been recorded on an average of 12 per cent per day as compared to 17 per cent last year, 14 per cent in 2019 and 16 per cent in 2018. Learn how the mist formed? “Obviously the combined effect of adverse weather conditions (cold and calm winds), stubble and crackers burning has turned the weather hazy,” said Anumita Roy Chowdhury, executive director of research at CSE. There was haze for eight days in 2019 CSE said that comparing the first occurrence of haze of the last four years, the current haze matches the first haze period of 2018 and 2020 which lasted for six days. If the conditions do not improve, it could last longer than the haze of 2019 which lasted for eight days.

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दिल्ली ने ओढ़ी मौसम की पहली घनी धुंध की चादर, इस बार टूटेगा चार साल का रिकॉर्ड!

दिल्ली और राष्ट्रीय राजधानी (Delhi-NCR) क्षेत्र में मौसम की पहली घनी धुंध (Smog) छा गई है और इसके दो और दिनों तक रहने की आशंका है. विज्ञान एवं पर्यावरण केंद्र (सीएसई) ने बुधवार को यह जानकारी दी. नई दिल्ली : दिल्ली और राष्ट्रीय राजधानी (Delhi-NCR) क्षेत्र में मौसम की पहली घनी धुंध (Smog) छा गई है और इसके दो और दिनों तक रहने की आशंका है. विज्ञान एवं पर्यावरण केंद्र (सीएसई) ने बुधवार को यह जानकारी दी.Also Read - देशभर में छठ पर्व की धूम: बिहार, दिल्‍ली, यूपी समेत देश के कई राज्‍यों में डूबते सूरज को दिया गया अर्घ्य हालांकि, दिल्ली में मौसमी धुंध घनी है, लेकिन अक्टूबर के मध्य से आठ नवंबर तक पराली जलाने से होने वाले धुएं का औसत दैनिक योगदान पिछले चार वर्षों में सबसे कम रहा है. Also Read - Chhath: अगर आप भी यमुना घाट पर जाने वाले हैं, तो ये खबर पढ़ें और दूसरा घाट तलाश करें सीएसई में अनुसंधान की कार्यकारी निदेशक अनुमिता रॉय चौधरी ने कहा, ‘‘जाहिर तौर पर मौसम की प्रतिकूल परिस्थितियों (ठंडी और शांत हवाओं) के संयुक्त असर, पराली और पटाखे जलाने से मौसम की धुंध छा गई है.’’ Also Read - Padma Awards: दिवंगत गायक एसपी बालसुब्रमण्यम, तरुण गोगोई, सुमित्रा महाजन समेत 118 प्रतिष्ठित हस्तियां पद्म पुरस्कारों से सम्मानित सीएसई ने बताया कि पिछले चार वर्षों की धुंध की पहली घटना की तुलना करने पर मौजूदा धुंध 2018 और 2020 की पहली धुंध की अवधि से मिलती है, जो छह दिनों तक रही थी. अगर परिस्थितियों में सुधार नहीं होता है तो यह 2019 की धुंध से भी अधिक समय तक रह सकती है जो आठ दिनों तक रही थी. सीएसई ने कहा, ‘‘दिल्ली के औसतन दैनिक पीएम2.5 में अक्टूबर से आठ नवंबर के दौरान धुएं का योगदान पिछले चार वर्षों में सबसे कम रहा है. अभी तक यह प्रतिदिन औसतन 12 प्रतिशत दर्ज किया गया, जबकि पिछले साल 17 फीसदी, 2019 में 14 फीसदी और 2018 में 16 प्रतिशत था.’’ (इनपुट – पीटीआई)

Clean Air & Sustainable Mobility

Delhi in grip of season’s 1st smog episode, could be longest in 4 yrs: Report

New Delhi: The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said on Wednesday. Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said. “Predictably, the season’s first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers,” said Anumita Roychowdhury, executive director, research and advocacy, CSE. Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season — both lasted six days. If conditions don’t improve, it might overtake the 2019 smog that lasted eight days, the CSE said. The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year’s smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said. “While very high concentrations of PM2.5 have hogged attention, the levels of gases – ozone, CO or NO2 — have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017,” said Avikal Somvanshi, programme manager, Urban Lab, CSE. This analysis is based on the real time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain. “On an average, contribution of smoke to Delhi’s daily PM2.5 during middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR),” the CSE said. “If converted to absolute concentrations, the per day contribution of smoke stood at 26 microgram per cubic metre this year so far compared to 35 microgram per cubic metre in 2020, 40 microgram per cubic metre in 2019, and 31 microgram per cubic metre in 2018,” it said. However, the peak contribution of smoke to Delhi’s PM level was recorded on 7th November when it hit 48 per cent. This the second highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018. The highest single day contribution percentage has been 58 per cent recorded on November 5, 2018. “The ongoing smog episode is a public health emergency. This requires urgent emergency action on key combustion sources (vehicles, industry, waste burning) and dust sources (construction and roads) to prevent further trapping of pollution when there is no wind to blow this away. We need pollution-source-wise and hotspot-wise status of action,” Roychowdhury said.

Clean Air & Sustainable Mobility

Delhi in grip of season's first smog episode, likely to be longest in 4 yrs: CSE

The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said on We... The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said on Wednesday. Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said. “Predictably, the season's first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers,” said Anumita Roychowdhury, executive director, research and advocacy, CSE. Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season -- both lasted six days. If conditions don't improve, it might overtake the 2019 smog that lasted eight days, the CSE said. The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year's smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said. “While very high concentrations of PM2.5 have hogged attention, the levels of gases – ozone, CO or NO2 -- have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017," said Avikal Somvanshi, programme manager, Urban Lab, CSE. This analysis is based on the real time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain. “On an average, contribution of smoke to Delhi's daily PM2.5 during middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR),” the CSE said. “If converted to absolute concentrations, the per day contribution of smoke stood at 26 microgram per cubic metre this year so far compared to 35 microgram per cubic metre in 2020, 40 microgram per cubic metre in 2019, and 31 microgram per cubic metre in 2018,” it said. However, the peak contribution of smoke to Delhi's PM level was recorded on 7th November when it hit 48 per cent. This the second highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018. The highest single day contribution percentage has been 58 per cent recorded on November 5, 2018. “The ongoing smog episode is a public health emergency. This requires urgent emergency action on key combustion sources (vehicles, industry, waste burning) and dust sources (construction and roads) to prevent further trapping of pollution when there is no wind to blow this away. We need pollution-source-wise and hotspot-wise status of action,” Roychowdhury said.

Clean Air & Sustainable Mobility

Delhi-NCR in grip of season's first smog episode, likely to be longest in 4 years: Study

The first severe smog episode has hit Delhi and the National Capital Region (NCR) and is expected to last for another two days, green think-tank Centre for Science and Environment (CSE) said on Wednesday. Even though the seasonal smog in Delhi is intense, the average daily contribution of smoke from farm fires from the middle of October to November 8 has been the lowest in last four years, it said. “Predictably, the season's first episode has been triggered by the combined effect of unfavourable weather conditions (cool and calm winds and inversion), stubble burning and firecrackers,” said Anumita Roychowdhury, executive director, research and advocacy, CSE. Compared to the first smog episode of previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season -- both lasted six days. If conditions don't improve, it might overtake the 2019 smog that lasted eight days, the CSE said. ALSO READ | Amid criticism, Delhi govt invokes 5-point action plan against air pollution The average intensity of the smog this year so far is 329 microgram per cubic metre per day, which is lower than that of the 2020 smog (by 7 per cent) and 2019 smog (by 3 per cent). It is more intense than the 2018 smog (about 9 per cent). Lingering on of this year's smog for longer duration despite relatively windier local conditions might be due to the lack of pollution control measures in the city, the green think tank said. “While very high concentrations of PM2.5 have hogged attention, the levels of gases ozone, CO or NO2 -- have remained elevated during this smog episode. Also, the ratio of SO2 to NO2 increased on Diwali night indicating increased pollution load from firecrackers. The PM2.5 concentration on Diwali night (8 pm to 8 am) has been the most intense since 2017," said Avikal Somvanshi, programme manager, Urban Lab, CSE. This analysis is based on the real time data available from the current working air quality monitoring stations in Delhi-NCR and the larger Indo-Gangetic Plain. In a graphic: Air pollution's top health risks “On an average, contribution of smoke to Delhi's daily PM2.5 during middle of October to November 8 has been the lowest in the last four years. So far, it has recorded on an average 12 per cent per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019, and 16 per cent per day in 2018 (as reported by SAFAR),” the CSE said. “If converted to absolute concentrations, the per day contribution of smoke stood at 26 microgram per cubic metre this year so far compared to 35 microgram per cubic metre in 2020, 40 microgram per cubic metre in 2019, and 31 microgram per cubic metre in 2018,” it said. However, the peak contribution of smoke to Delhi's PM level was recorded on 7th November when it hit 48 per cent. This the second highest daily contribution percentage recorded since such estimation was started by SAFAR in 2018. The highest single day contribution percentage has been 58 per cent recorded on November 5, 2018. “The ongoing smog episode is a public health emergency. This requires urgent emergency action on key combustion sources (vehicles, industry, waste burning) and dust sources (construction and roads) to prevent further trapping of pollution when there is no wind to blow this away. We need pollution-source-wise and hotspot-wise status of action,” Roychowdhury said.

Clean Air & Sustainable Mobility

Delhi in grip of season’s 1st smog episode, could be longest in 4 yrs: Report-Business Journal

Clean Air & Sustainable Mobility

CSE’s new assessment says that the first smog episode of the season has knocked in Delhi-NCR

Clean Air & Sustainable Mobility