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DL-POLLUTION-CSE - Marginal improvement in Delhi-NCR's air quality this winter season despite record rain

Clean Air & Sustainable Mobility

Regional Sources Bigger Contributor than Stubble Smoke to Delhi-NCR Winter Pollution, Claims CSE

Despite being this winter being the wettest, the overall winter average of PM2.5 has stayed elevated and the overall contribution of the local and regional sources were higher than that from stubble smoke, an analysis of winter pollution for Delhi-NCR by the Centre for Science and Environment (CSE) showed on Wednesday. While there had been a minor drop in the seasonal level compared to previous winters, the level is still extremely high, and far from meeting the safety standards, the CSE researchers said, warning that if not acted upon immediately, this trend can worsen in the coming years negating the downward dip of the pandemic years. The CSE carried out the analysis of real-time data from monitoring stations in Delhi-NCR for the entire winter period – starting from October 1, 2021 till February 28, 2022. “Elevated pollution levels and smog episodes are evidence of the systemic pollution that has continued in the region due to inadequate infrastructure and systems for pollution control in all sectors. This can be tamed only if round the year action becomes more stringent and uniform across sectors and the region,” said Anumita Roychowdhury, Executive Director, Research and Advocacy, CSE. Avikal Somvanshi, Programme manager, Urban Lab Analytics, CSE, said: “Even though there is considerable variation in seasonal averages across the region, winter pollution episodes are alarmingly high and synchronised in the region despite large distances. Despite being the wettest winter, the overall winter average of PM2.5 has stayed elevated and the overall contribution of the local and regional sources are higher than that from stubble smoke.” According to SAFAR, smoke from the stubble fire in northern states started contributing to Delhi’s PM2.5 level from October 10, 2021 and ended on November 30, 2021. During these 52 days, the percentage contribution varied between one per cent and 48 per cent, with the latter being reported on November 7, 2021. This winter’s stubble fire season was four days shorter than the ones in the previous two winters. The number of days when percentage contribution was over 40 per cent was the same this winter as last year: just two days. But if looked at from absolute concentration terms, this year had twice the number of days when the PM2.5 load from stubble fire was high enough to plunge Delhi’s air quality into ‘very poor’ category on its own. Further, these high contribution load days happened in a cluster, which indicates that the biggest bulk burning instances took place in a span of fewer days this year than in the previous years. This might be due to the extended monsoon which reduced the rain-free period before the sowing of the wheat crop. The city-wide winter average for Delhi stood at 172 micro-gram per cubic metre, which is identical to the seasonal average of the winter of 2019-20 but is nine per cent lower than the seasonal average of 2020-21 winter. The seasonal peak was about five per cent lower than both preceding winters. Number of days with severe or worse air quality bounced back to pre-Covid levels: This winter, 25 days had the city-wide average in ‘severe’ or ‘worse’ AQI category — up from 23 such days in the previous winter and on par with 25 days in the winter of 2019-20. The CSE used data as recorded by 81 air quality monitoring stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) of the Central Pollution Control Board (CPCB) while the farm stubble fire data was sourced from System of Air Quality and Weather Forecasting and Research (SAFAR). Weather data was sourced from the Safdarjang weather station of Indian Meteorological Department (IMD).

Clean Air & Sustainable Mobility

Regional sources bigger contributor than stubble smoke to Delhi-NCR winter pollution: CSE

Clean Air & Sustainable Mobility

Regional sources bigger contributor than stubble smoke to Delhi-NCR winter pollution: CSE

Clean Air & Sustainable Mobility

Marginal improvement in Delhi-NCR"s air quality this winter season despite record rain

Delhi recorded 25 "severe" air quality days this winter season – equalling the number of such days in 2019-20 – despite heavy and prolonged rains, according to an analysis by the Centre for Science and Environment.The city also saw two days of "good" air and seven days of "satisfactory" air this winter, which is an improvement from the last winter season when no such low-pollution days were recorded.This high variability in air quality this winter can be attributed to the increased number of heavy rainfall days and colder-than-usual weather.The winter average of PM2.5 for Delhi stood at 172 micrograms per cubic metre (?g/m3), which is equal to the average of the 2019-20 winter season but is 9 per cent lower than the seasonal average of the 2020-21 winter.Meteorologically, this winter was the wettest in recent years with almost two-three times more rainfall, bulk of which happened in January, compared to previous winters, making it the least polluted January since real-time air quality monitoring started in the city.But this meteorological advantage did not give much reprieve to the city as a rapid build-up in between rainy spells and the formation of smog episodes during rainless periods kept the overall seasonal average very high, the green think tank said."Elevated pollution levels and smog episodes are evidence of the systemic pollution that has continued in the region due to inadequate infrastructure and systems for pollution control in all sectors."This can be tamed only if round-the-year action becomes more stringent and uniform across sectors and the region. Action has to be performance-based to meet the clean air standards," said Anumita Roychowdhury, executive director, Research and Advocacy, CSE.Avikal Somvanshi, programme manager, Urban Lab Analytics, CSE, said, "Even though there is considerable variation in seasonal averages across the region, winter pollution episodes are alarmingly high and synchronised in the region despite large distances." "This is the challenge of this landlocked region. Despite being the wettest winter, the overall winter average of PM2.5 has stayed elevated and the overall contribution of the local and regional sources are higher than that from stubble smoke," Somvanshi said. PTI GVS DIV DIV

Clean Air & Sustainable Mobility

Local Sources Responsible For 80 Percent Of Pollution In Winter – CSE Revealed: Local Sources Responsible For 80 Percent Of Pollution In Winter, Researchers Warning

very year in Delhi-NCR, when the air suffocates in winter, the stubble smoke becomes the basis for the politics of accusation. In contrast, in the winter of last year, local level pollution has been found to be responsible for 80 percent of the suffocating air. The Center for Science and Environment (CSE) has analyzed in this regard. Researchers warn that this trend could worsen in the coming years if action is not taken immediately. CSE has analyzed the real time data from monitoring stations in Delhi-NCR during 1st October 2021 to 28th February 2022. This shows that the levels of haze and pollution have increased this winter despite heavy and prolonged rains at various stages. During this, due to the lockdown and rain caused by the Corona epidemic, some days of satisfactory category have also been recorded, which were not recorded in the last three seasons. CSE Executive Director Anumita Choudhary says that the increased pollution levels and smog episodes are a testament to the systemic pollution, which continues in the region due to inadequate infrastructure and systems for pollution control in all areas. This can be controlled only when the year-round action becomes more stringent and uniform across sectors and regions. The performance of the action should be based on meeting clean air standards. Avikal Somvanshi, program manager at CSE’s Urban Lab Analytics, says that even though there is considerable variation in seasonal averages across the region, winter pollution episodes are alarmingly high in the region despite large distances. data used in analysis For analysis, data recorded by 81 air quality monitoring stations of the Central Pollution Control Board (CPCB) has been analyzed. Also, the data on stubble smoke in the field has been taken from the System of Air Quality and Weather Forecasting and Research (SAFAR). The weather data has been taken from the Safdarjung Meteorological Center of the Indian Meteorological Department. Stubble smoke contributes up to 48 percent According to SAFAR, stubble smoke in northern states started contributing to Delhi’s PM 2.5 level from October 10, 2021. Its effect was recorded till 30 November 2021. Its contribution to pollution during these 52 days ranged from one per cent to 48 per cent. The impact of stubble fires on air quality this winter was four days less than in the previous two winters. In winter last year, the air quality of severe level was recorded for 25 days. At the same time, 23 such days were recorded in the last winter.

Clean Air & Sustainable Mobility

Winter air poor despite rain | Latest News Delhi – Delhi news for today

Despite its wettest winter in several decades, the Capital only saw a marginal reduction in pollution this time around as compared to last year, according to the Centre for Science and Environment (CSE). Despite recording its wettest winter in the last several decades, Delhi only saw a marginal reduction in pollution this time around as compared to last year, found an analysis released by the Centre for Science and Environment (CSE) on Wednesday. Analysing a five-month period from October 1, 2021, to February 28, 2022, the city-wide average PM 2.5 level was found to be 172 microgramme per cubic metre (μg/m3) — over four times the national annual standard of 40μg/m3 and the daily standard of 60μg/m3. This is 9% lower than the seasonal average during the corresponding period in 2020-21 (189μg/m3), and similar to the pollution level in 2019-20 (173μg/m3). The 2018-19 winter saw an average PM2.5 level of 190μg/m3. The analysis also found the seasonal peak PM 2.5 level (516μg/m3) to be 5% lower than in 2020-21 (542μg/m3) and 2019-20 (549μg/m3). “Meteorologically, this winter was the wettest in recent years with almost two-three fold more rainfall compared to previous winters, bulk of which happened in January, making it the least polluted January since real-time air quality monitoring started in the city. But, this meteorological advantage did not give much reprieve to the city as a rapid build-up in between rainy spells and formation of smog episodes during the rainless periods kept overall seasonal average very high,” said the analysis. Delhi recorded 217mm of rainfall during this winter period — nearly double of the 114mm recorded in the previous winter. The Capital was 74mm during the 2019-20 winter and 86mm in 2018-19 winter.

Clean Air & Sustainable Mobility

80% daily PM2.5 levels in Delhi-NCR from non-stubble sources

Delhi’s air this winter was slightly cleaner than previous years, but still extremely unhealthy Stubble burning in villages surrounding Delhi and National Capital Region, blamed for the region’s intense air pollution every winter, may actually have a much smaller role to play, said a new report. Over 80 per cent of the daily average concentration of particulate matter 2.5 (PM2.5) was attributed to non-stubble sources during October and November — the major crop-burning months, the report by the Centre for Science and Environment, a Delhi-based non-profit, showed. Smog episodes (PM2.5 concentration over 250 micrograms per cubic metre) during late December occur every winter even without the influence of stubble smoke, the analysts noted in the report. Local pollutants, entrapped close to ground because of low temperature and low winds, led to 5 per cent higher PM2.5 levels in the months following the stubble-burning season this year than during. The average PM2.5 concentration due to stubble-burning during the 52 days in Oct-Dec this year was 28 ug / m3 per day — less than a quarter of that due to other sources. “This is consistent with the trend noted during the previous winter,” the report said. Delhi’s air this winter was slightly cleaner than previous years, but still extremely unhealthy, the researchers said. The improvement was marginal despite the city recording its wettest winter in a century. The city-wide winter average for Delhi stood at 172 μg/m3 — identical to the seasonal average of the winter of 2019-20 but 9 per cent lower than the seasonal average of 2020-21 winter. The analysis is based on real-time (15-minute averages) air pollution data collected from 81 air quality monitoring stations by the Central Pollution Control Board. Farm stubble fire data has been sourced from System of Air Quality and Weather Forecasting and Research (SAFAR) and weather data from the Safdarjang weather station of Indian Meteorological Department (IMD). The capital recorded more days (25) with ‘severe’ or ‘worse’ air quality index than the previous winter. The figure is equal to that recorded in 2019-20, indicating the intensity and duration of pollution has fallen back to pre-pandemic levels. Clean air days were also higher this winter, the researchers observed: There were two days of ‘good’ air and seven days of ‘satisfactory’ air, while there were none last winter. This high variability in air quality can be attributed to increased number of heavy rainfall days and colder-than-usual weather, the report said. The winter smog episodes this year was less intense but more prolonged in the region, it added. We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.

Clean Air & Sustainable Mobility

Regional sources bigger contributor than stubble smoke to Delhi-NCR winter pollution: CSE

Despite being this winter being the wettest, the overall winter average of PM2.5 has stayed elevated and the overall contribution of the local and regional sources were higher than that from stubble smoke, an analysis of winter pollution for Delhi-NCR by the Centre for Science and Environment (CSE) showed on Wednesday. While there had been a minor drop in the seasonal level compared to previous winters, the level is still extremely high, and far from meeting the safety standards, the CSE researchers said, warning that if not acted upon immediately, this trend can worsen in the coming years negating the downward dip of the pandemic years. The CSE carried out the analysis of real-time data from monitoring stations in Delhi-NCR for the entire winter period - starting from October 1, 2021 till February 28, 2022. "Elevated pollution levels and smog episodes are evidence of the systemic pollution that has continued in the region due to inadequate infrastructure and systems for pollution control in all sectors. This can be tamed only if round the year action becomes more stringent and uniform across sectors and the region," said Anumita Roychowdhury, Executive Director, Research and Advocacy, CSE. Avikal Somvanshi, Programme manager, Urban Lab Analytics, CSE, said: "Even though there is considerable variation in seasonal averages across the region, winter pollution episodes are alarmingly high and synchronised in the region despite large distances. Despite being the wettest winter, the overall winter average of PM2.5 has stayed elevated and the overall contribution of the local and regional sources are higher than that from stubble smoke." According to SAFAR, smoke from the stubble fire in northern states started contributing to Delhi's PM2.5 level from October 10, 2021 and ended on November 30, 2021. During these 52 days, the percentage contribution varied between one per cent and 48 per cent, with the latter being reported on November 7, 2021. This winter's stubble fire season was four days shorter than the ones in the previous two winters. The number of days when percentage contribution was over 40 per cent was the same this winter as last year: just two days. But if looked at from absolute concentration terms, this year had twice the number of days when the PM2.5 load from stubble fire was high enough to plunge Delhi's air quality into 'very poor' category on its own. Further, these high contribution load days happened in a cluster, which indicates that the biggest bulk burning instances took place in a span of fewer days this year than in the previous years. This might be due to the extended monsoon which reduced the rain-free period before the sowing of the wheat crop. The city-wide winter average for Delhi stood at 172 micro-gram per cubic metre, which is identical to the seasonal average of the winter of 2019-20 but is nine per cent lower than the seasonal average of 2020-21 winter. The seasonal peak was about five per cent lower than both preceding winters. Number of days with severe or worse air quality bounced back to pre-Covid levels: This winter, 25 days had the city-wide average in 'severe' or 'worse' AQI category -- up from 23 such days in the previous winter and on par with 25 days in the winter of 2019-20. The CSE used data as recorded by 81 air quality monitoring stations under the Continuous Ambient Air Quality Monitoring System (CAAQMS) of the Central Pollution Control Board (CPCB) while the farm stubble fire data was sourced from System of Air Quality and Weather Forecasting and Research (SAFAR). Weather data was sourced from the Safdarjang weather station of Indian Meteorological Department (IMD).

Clean Air & Sustainable Mobility

Winter air poor regardless of rain | Newest Information Delhi

Regardless of its wettest winter in a number of many years, the Capital solely noticed a marginal discount in air pollution this time round as in comparison with final 12 months, based on the Middle for Science and Atmosphere (CSE). Regardless of recording its wettest winter within the final a number of many years, Delhi solely noticed a marginal discount in air pollution this time round as in comparison with final 12 months, discovered an evaluation launched by the Middle for Science and Atmosphere (CSE) on Wednesday. Analyzing a five-month interval from October 1, 2021, to February 28, 2022, the city-wide common PM 2.5 degree was discovered to be 172 microgramme per cubic meter (μg/m3) — over 4 instances the nationwide annual customary of 40μg/m3 and the every day customary of 60μg/m3. That is 9% decrease than the seasonal common throughout the corresponding interval in 2020-21 (189μg/m3), and just like the air pollution degree in 2019-20 (173μg/m3). The 2018-19 winter noticed a median PM2.5 degree of 190μg/m3. The evaluation additionally discovered the seasonal peak PM 2.5 degree (516μg/m3) to be 5% decrease than in 2020-21 (542μg/m3) and 2019-20 (549μg/m3). “Meteorologically, this winter was the wettest lately with nearly two-three fold extra rainfall in comparison with earlier winters, bulk of which occurred in January, making it the least January since real-time air high quality monitoring began within the metropolis. However, this meteorological benefit didn’t give a lot reprieve to the town as a speedy build-up in between wet spells and formation of smog episodes throughout the rainless durations saved total seasonal common very excessive,” mentioned the evaluation. Delhi recorded 217mm of rainfall throughout this winter interval — almost double of the 114mm recorded within the earlier winter. The Capital was 74mm throughout the 2019-20 winter and 86mm in 2018-19 winter.

Clean Air & Sustainable Mobility

Winter air bad despite rain | Latest News Delhi

Despite the wettest winter in several decades, the capital saw only a modest reduction in pollution compared to last year, according to the Center for Science and Environment (CSE). Although Delhi experienced its wettest winter in decades, this time around Delhi saw only a modest reduction in pollution compared to last year, according to an analysis released by the Center for Science and Environment (CSE) on Wednesday. Analyzing a five-month period from October 1, 2021 to February 28, 2022, the citywide average PM 2.5 level was found to be 172 micrograms per cubic meter (μg/m3) — more than four times the national annual standard of 40μg/m3. m3 and the daily standard of 60μg/m3. This is 9% lower than the seasonal average in the corresponding period of 2020-21 (189 μg/m3) and similar to the pollution level of 2019-20 (173 μg/m3). In the winter of 2018/19, an average PM2.5 value of 190 μg/m3 was recorded. The analysis also revealed that the seasonal PM 2.5 peak (516 μg/m3) was 5% lower than in 2020-21 (542 μg/m3) and 2019-20 (549 μg/m3). “Meteorologically, this winter was the wettest in recent years, with almost two to three times more precipitation than previous winters, the bulk of which fell in January, making it the January with the least pollution since real-time air quality monitoring began in the city power. But this meteorological advantage didn’t give the city much respite, as a rapid build-up between rainy spells and the formation of smog episodes during rainless periods kept the overall seasonal average very high,” the analysis said. Delhi recorded 217mm of rainfall this winter – almost double the previous winter’s 114mm. The capital was 74 mm in winter 2019-20 and 86 mm in winter 2018-19.

Clean Air & Sustainable Mobility

Winter air poor despite rain | Latest News Delhi

Despite its wettest winter in several decades, the Capital only saw a marginal reduction in pollution this time around as compared to last year, according to the Center for Science and Environment (CSE). Despite recording its wettest winter in the last several decades, Delhi only saw a marginal reduction in pollution this time around as compared to last year, found an analysis released by the Center for Science and Environment (CSE) on Wednesday. Analyzing a five-month period from October 1, 2021, to February 28, 2022, the city-wide average PM 2.5 level was found to be 172 microgramme per cubic meter (μg/m3) — over four times the national annual standard of 40μg /m3 and the daily standard of 60μg/m3. This is 9% lower than the seasonal average during the corresponding period in 2020-21 (189μg/m3), and similar to the pollution level in 2019-20 (173μg/m3). The 2018-19 winter saw an average PM2.5 level of 190μg/m3. The analysis also found the seasonal peak PM 2.5 level (516μg/m3) to be 5% lower than in 2020-21 (542μg/m3) and 2019-20 (549μg/m3). “Meteorologically, this winter was the wettest in recent years with almost two-three fold more rainfall compared to previous winters, bulk of which happened in January, making it the least January since real-time air quality monitoring started in the city. But, this meteorological advantage did not give much reprieve to the city as a rapid build-up in between rainy spells and formation of smog episodes during the rainless periods kept overall seasonal average very high,” said the analysis. Delhi recorded 217mm of rainfall during this winter period — nearly double of the 114mm recorded in the previous winter. The Capital was 74mm during the 2019-20 winter and 86mm in 2018-19 winter.

Clean Air & Sustainable Mobility

दिल्ली-एनसीआर में शीतकालीन प्रदूषण में पराली के धुएं से बड़ा योगदान क्षेत्रीय स्रोत, सीएसई का दावा

इस सर्दी में सबसे अधिक बारिश होने के बावजूद, पीएम2.5 का समग्र सर्दियों का औसत ऊंचा बना हुआ है और स्थानीय और क्षेत्रीय स्रोतों का समग्र योगदान पराली के धुएं से अधिक था, केंद्र द्वारा दिल्ली-एनसीआर के लिए सर्दियों के प्रदूषण का विश्लेषण। विज्ञान और पर्यावरण (सीएसई) ने बुधवार को दिखाया। जबकि पिछली सर्दियों की तुलना में मौसमी स्तर में मामूली गिरावट आई थी, स्तर अभी भी बहुत अधिक है, और सुरक्षा मानकों को पूरा करने से बहुत दूर, सीएसई शोधकर्ताओं ने चेतावनी देते हुए कहा कि अगर तुरंत कार्रवाई नहीं की गई, तो यह प्रवृत्ति खराब हो सकती है। आने वाले वर्षों में महामारी के वर्षों में गिरावट को नकारते हुए। “बढ़े हुए प्रदूषण के स्तर और धुंध के एपिसोड प्रणालीगत प्रदूषण का सबूत हैं जो सभी क्षेत्रों में प्रदूषण नियंत्रण के लिए अपर्याप्त बुनियादी ढांचे और प्रणालियों के कारण इस क्षेत्र में जारी है। इस पर तभी काबू पाया जा सकता है जब साल भर कार्रवाई और अधिक सख्त और सभी क्षेत्रों और क्षेत्र में एक समान हो जाए।” सीएसई के अर्बन लैब एनालिटिक्स के प्रोग्राम मैनेजर अविकल सोमवंशी ने कहा: “भले ही पूरे क्षेत्र में मौसमी औसत में काफी भिन्नता है, लेकिन बड़ी दूरी के बावजूद इस क्षेत्र में सर्दियों के प्रदूषण के एपिसोड खतरनाक रूप से उच्च और सिंक्रनाइज़ हैं। सबसे अधिक सर्दी होने के बावजूद, कुल सर्दियों का औसत PM2.5 ऊंचा बना हुआ है और स्थानीय और क्षेत्रीय स्रोतों का समग्र योगदान पराली के धुएं की तुलना में अधिक है।” सफर के अनुसार, उत्तरी राज्यों में पराली की आग से निकलने वाले धुएं ने 10 अक्टूबर, 2021 से दिल्ली के PM2.5 स्तर में योगदान देना शुरू कर दिया और 30 नवंबर, 2021 को समाप्त हो गया। इन 52 दिनों के दौरान, प्रतिशत योगदान एक प्रतिशत से 48 प्रतिशत के बीच रहा। , बाद में 7 नवंबर, 2021 को रिपोर्ट किया गया था। इस सर्दियों की पराली की आग का मौसम पिछले दो सर्दियों की तुलना में चार दिन छोटा था। उन दिनों की संख्या जब प्रतिशत योगदान 40 प्रतिशत से अधिक था, पिछले साल की तरह ही इस सर्दी में भी था: सिर्फ दो दिन। लेकिन अगर पूर्ण एकाग्रता की दृष्टि से देखा जाए, तो इस वर्ष दिनों की संख्या दोगुनी थी जब पराली की आग से पीएम 2.5 का भार दिल्ली की वायु गुणवत्ता को अपने आप ‘बहुत खराब’ श्रेणी में गिराने के लिए पर्याप्त था। इसके अलावा, ये उच्च योगदान लोड दिन एक क्लस्टर में हुए, जो इंगित करता है कि पिछले वर्षों की तुलना में इस वर्ष कम दिनों की अवधि में सबसे बड़ी बल्क बर्निंग हुई। यह विस्तारित मानसून के कारण हो सकता है जिसने गेहूं की फसल की बुवाई से पहले वर्षा मुक्त अवधि को कम कर दिया। दिल्ली के लिए शहर भर में सर्दियों का औसत 172 माइक्रो-ग्राम प्रति घन मीटर रहा, जो कि 2019-20 की सर्दियों के मौसमी औसत के समान है, लेकिन 2020-21 की सर्दियों के मौसमी औसत से नौ प्रतिशत कम है। मौसमी शिखर दोनों पूर्ववर्ती सर्दियों की तुलना में लगभग पांच प्रतिशत कम था। गंभीर या खराब वायु गुणवत्ता वाले दिनों की संख्या पूर्व-कोविड स्तरों पर वापस आ गई: इस सर्दी में, 25 दिनों का शहर-व्यापी औसत ‘गंभीर’ या ‘बदतर’ AQI श्रेणी में था – पिछली सर्दियों में ऐसे 23 दिनों से ऊपर और 2019-20 की सर्दियों में 25 दिनों के बराबर। सीएसई ने केंद्रीय प्रदूषण नियंत्रण बोर्ड (सीपीसीबी) के कंटीन्यूअस एम्बिएंट एयर क्वालिटी मॉनिटरिंग सिस्टम (सीएएक्यूएमएस) के तहत 81 वायु गुणवत्ता निगरानी स्टेशनों द्वारा रिकॉर्ड किए गए डेटा का इस्तेमाल किया, जबकि फार्म स्टबल फायर डेटा सिस्टम ऑफ एयर क्वालिटी एंड वेदर फोरकास्टिंग एंड रिसर्च से प्राप्त किया गया था। (सफर)। मौसम के आंकड़े भारतीय मौसम विज्ञान विभाग (आईएमडी) के सफदरजंग मौसम केंद्र से लिए गए हैं।

Clean Air & Sustainable Mobility

बारिश के बावजूद सर्दी की हवा खराब | ताजा खबर दिल्ली

सेंटर फॉर साइंस एंड एनवायरनमेंट (सीएसई) के अनुसार, कई दशकों में सबसे भीषण सर्दी के बावजूद, राजधानी में पिछले साल की तुलना में इस बार प्रदूषण में मामूली कमी देखी गई। सेंटर फॉर साइंस एंड एनवायरनमेंट (सीएसई) द्वारा बुधवार को जारी एक विश्लेषण में पाया गया कि पिछले कई दशकों में अपनी सबसे अधिक सर्दी दर्ज करने के बावजूद, दिल्ली में पिछले साल की तुलना में इस बार प्रदूषण में मामूली कमी देखी गई। 1 अक्टूबर, 2021 से 28 फरवरी, 2022 तक की पांच महीने की अवधि का विश्लेषण करते हुए, शहर भर में औसत पीएम 2.5 स्तर 172 माइक्रोग्राम प्रति घन मीटर (μg/m3) पाया गया – जो कि राष्ट्रीय वार्षिक मानक से चार गुना अधिक है। 40μg/m3 और दैनिक मानक 60μg/m3। यह 2020-21 (189μg/m3) में इसी अवधि के दौरान मौसमी औसत से 9% कम है, और 2019-20 में प्रदूषण स्तर (173μg/m3) के समान है। 2018-19 की सर्दियों में औसत PM2.5 स्तर 190μg/m3 देखा गया। विश्लेषण में यह भी पाया गया कि मौसमी शिखर पीएम 2.5 स्तर (516μg/m3) 2020-21 (542μg/m3) और 2019-20 (549μg/m3) की तुलना में 5% कम है। “मौसम विज्ञान के अनुसार, यह सर्दी हाल के वर्षों में सबसे अधिक बारिश थी, जिसमें पिछली सर्दियों की तुलना में लगभग दो-तीन गुना अधिक बारिश हुई थी, जिनमें से अधिकांश जनवरी में हुई थी, जिससे शहर में वास्तविक समय की वायु गुणवत्ता की निगरानी शुरू होने के बाद से जनवरी में यह सबसे कम प्रदूषित हुआ। लेकिन, इस मौसम संबंधी लाभ ने शहर को बहुत अधिक राहत नहीं दी क्योंकि बारिश के बीच तेजी से निर्माण और वर्षा रहित अवधि के दौरान धुंध के एपिसोड के गठन ने समग्र मौसमी औसत को बहुत अधिक रखा, ”विश्लेषण ने कहा। दिल्ली में इस सर्दियों की अवधि में 217 मिमी बारिश दर्ज की गई – पिछली सर्दियों में दर्ज 114 मिमी से लगभग दोगुनी। 2019-20 सर्दियों के दौरान राजधानी 74 मिमी और 2018-19 सर्दियों में 86 मिमी थी।

Clean Air & Sustainable Mobility

सीएसई का खुलासा : सर्दी में प्रदूषण के लिए स्थानीय स्रोत 80 फीसदी जिम्मेदार, शोधकर्ताओं ने दी चेतावनी

दिल्ली-एनसीआर में हर साल सर्दी में हवा के दमघोंटू होने पर पराली का धुएं आरोप प्रत्यारोप की राजनीति का आधार बनता है। इसके विपरीत बीते वर्ष की सर्दी में दमघोंटू हवा के लिए स्थानीय स्तर का प्रदूषण 80 फीसदी जिम्मेदार पाया गया है। इस संबंध में सेंटर फॉर साइंस एंड इनवायरमेंट (सीएसई) ने विश्लेषण किया है। शोधकर्ताओं ने चेतावनी दी है कि अगर इस पर तुरंत कार्रवाई नहीं की गई तो आने वाले वर्षों में यह प्रवृत्ति और खराब हो सकती है। सीएसई ने एक अक्तूबर 2021 से 28 फरवरी 2022 के दौरान दिल्ली-एनसीआर में निगरानी स्टेशनों से वास्तविक समय के आंकड़ों का विश्लेषण किया है। इससे पता चलता है कि इस सर्दी में विभिन्न चरणों में भारी और लंबे समय तक बारिश के बावजूद धुंध और प्रदूषण के स्तर में वृद्धि हुई है। इस दौरान कोरोना महामारी के कारण लगने वाले लॉकडाउन और बारिश के कारण कुछ दिन संतोषजनक श्रेणी के भी दर्ज किए गए हैं, जो कि बीते तीन सीजन में दर्ज नहीं हुए। सीएसई के कार्यकारी निदेशक अनुमिता चौधरी कहती हैं कि बढ़े हुए प्रदूषण के स्तर और स्मॉग एपिसोड प्रणालीगत प्रदूषण का एक प्रमाण है, जो सभी क्षेत्रों में प्रदूषण नियंत्रण के लिए अपर्याप्त बुनियादी ढांचे और प्रणालियों के कारण क्षेत्र में जारी है। इसे तभी काबू में किया जा सकता है जब साल भर की कार्रवाई सभी क्षेत्रों और क्षेत्र में अधिक कठोर और एक समान हो जाए। स्वच्छ वायु मानकों को पूरा करने के लिए कार्रवाई का प्रदर्शन आधारित होना चाहिए। सीएसई के अर्बन लैब एनालिटिक्स के कार्यक्रम प्रबंधक अविकल सोमवंशी कहते हैं कि भले ही पूरे क्षेत्र में मौसमी औसत में काफी भिन्नता है, लेकिन बड़ी दूरी के बावजूद इस क्षेत्र में सर्दियों के प्रदूषण के एपिसोड खतरनाक रूप से उच्च हैं। विश्लेषण में प्रयुक्त डाटा विश्लेषण के लिए केंद्रीय प्रदूषण नियंत्रण बोर्ड (सीपीसीबी) के 81 वायु गुणवत्ता निगरानी स्टेशनों द्वारा दर्ज आंकड़ों का विश्लेषण किया है। साथ ही खेत में पराली धुएं के आंकड़े सिस्टम ऑफ एयर क्वालिटी एंड वेदर फॉरकास्टिंग एंड रिसर्च (सफर) से लिए गए हैं। मौसम के आंकड़े भारतीय मौसम विभाग के सफदरजंग मौसम केंद्र से लिए गए हैं। पराली के धुएं का 48 फीसदी तक योगदान सफर के अनुसार, उत्तरी राज्यों में पराली के धुएं ने 10 अक्तूबर 2021 से दिल्ली के पीएम 2.5 स्तर में योगदान देना शुरू कर दिया था। इसका प्रभाव 30 नवंबर 2021 तक रिकॉर्ड किया गया। इन 52 दिनों के दौरान प्रदूषण में इसका योगदान एक फीसदी से 48 फीसदी के बीच रहा। इस सर्दी पराली की आग का वायु गुणवत्ता पर असर पिछले दो सर्दियों की तुलना में चार दिन कम था। बीते वर्ष सर्दी में 25 दिन गंभीर स्तर की वायु गुणवत्ता दर्ज की गई। वहीं, इससे पिछली सर्दियों में ऐसे 23 दिन दर्ज हुए थे।

Clean Air & Sustainable Mobility