Read on Twitter
North-westerly winds generally tend to contribute to Delhi’s air quality, whereas Delhi usually records south-westerly winds at this time of the year: @KurinjiSelvaraj
#Airpollution
http://timesofindia.indiatimes.com/articleshow/78394819.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
#Airpollution
http://timesofindia.indiatimes.com/articleshow/78394819.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
#Stubbleburning
Districts such as Amritsar & Tarn Taran in #Punjab recorded 3-4 times more fires from Sep 1 to Oct 4 compared with the same period last year: @KurinjiSelvaraj
https://timesofindia.indiatimes.com/city/delhi/punjab-farm-fires-up-9x-in-oct-this-year/articleshow/78502372.cms
#airpollution
Districts such as Amritsar & Tarn Taran in #Punjab recorded 3-4 times more fires from Sep 1 to Oct 4 compared with the same period last year: @KurinjiSelvaraj
https://timesofindia.indiatimes.com/city/delhi/punjab-farm-fires-up-9x-in-oct-this-year/articleshow/78502372.cms
#airpollution
Though we saw a marginal rise in fires in early October this year compared with the same period over the last few years, it is imp to look at the data for the entire season to draw year-on-year comparisons: @KurinjiSelvaraj
#airpollution #stubbleburning https://timesofindia.indiatimes.com/city/delhi/5-yr-high-early-spurt-in-punjab-farm-fires/articleshow/78563584.cms
#airpollution #stubbleburning https://timesofindia.indiatimes.com/city/delhi/5-yr-high-early-spurt-in-punjab-farm-fires/articleshow/78563584.cms
#Airpollution
Though we see a rise in fires in early October this year over the past few years, the values are still at the lower end — < 600/day. Peak #stubbleburning happens in end-October & early-November...with 3000-5000 fires/day: @KurinjiSelvaraj http://timesofindia.indiatimes.com/articleshow/78689477.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
Though we see a rise in fires in early October this year over the past few years, the values are still at the lower end — < 600/day. Peak #stubbleburning happens in end-October & early-November...with 3000-5000 fires/day: @KurinjiSelvaraj http://timesofindia.indiatimes.com/articleshow/78689477.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
#airpollution
On Oct 15, as the wind speeds increased during the day, we observed a dramatic decline in PM2.5 concentrations from 250ug/m3 to 50ug/m3. We saw a similar trend on Friday suggesting an inverse relationship between the two: @tanushree_g https://timesofindia.indiatimes.com/city/delhi/rise-in-wind-speed-helps-improve-aqi/articleshow/78709787.cms
On Oct 15, as the wind speeds increased during the day, we observed a dramatic decline in PM2.5 concentrations from 250ug/m3 to 50ug/m3. We saw a similar trend on Friday suggesting an inverse relationship between the two: @tanushree_g https://timesofindia.indiatimes.com/city/delhi/rise-in-wind-speed-helps-improve-aqi/articleshow/78709787.cms
#Airpollution
Our analysis showed that low mixing height, or the trapping of pollutants closer to the ground, and low wind speed hampered smoke dispersion, with the farm fires also adding to the pollutant burden in Delhi on Oct 23. @priyangiaTOI https://timesofindia.indiatimes.com/city/delhi/stay-indoors-wear-masks-and-its-not-covid/articleshow/78836389.cms
Our analysis showed that low mixing height, or the trapping of pollutants closer to the ground, and low wind speed hampered smoke dispersion, with the farm fires also adding to the pollutant burden in Delhi on Oct 23. @priyangiaTOI https://timesofindia.indiatimes.com/city/delhi/stay-indoors-wear-masks-and-its-not-covid/articleshow/78836389.cms
#Airpollution
While we have to take action at an air shed level on #stubbleburning & power plants within 200-300 kms of Delhi, we need to act all year round on factors within Delhi like transport, road & construction dust, & disposal of municipal waste: @GhoshArunabha on @ndtv
While we have to take action at an air shed level on #stubbleburning & power plants within 200-300 kms of Delhi, we need to act all year round on factors within Delhi like transport, road & construction dust, & disposal of municipal waste: @GhoshArunabha on @ndtv
. @KarthikGanesan6 discusses the new #airpollution law mooted by the government, why farmers alone aren't to be blamed, the legacy issue with AQ management & potential solutions with @sardesairajdeep on @IndiaToday.
@siddharth3
Watch: https://www.indiatoday.in/programme/news-unlocked-with-rajdeep-sardesai/video/india-pollution-air-sea-government-stubble-burning-1735704-2020-10-27
@siddharth3
Watch: https://www.indiatoday.in/programme/news-unlocked-with-rajdeep-sardesai/video/india-pollution-air-sea-government-stubble-burning-1735704-2020-10-27
#Airpollution
Instead of a new law, govt should 1st engage with farmers to understand why current measures to curb #stubbleburning haven't yielded results. In Delhi, legacy issues of waste management & inadequate buses will have to be solved first: @tanushree_g to @timesofindia
Instead of a new law, govt should 1st engage with farmers to understand why current measures to curb #stubbleburning haven't yielded results. In Delhi, legacy issues of waste management & inadequate buses will have to be solved first: @tanushree_g to @timesofindia
#Airpollution
Most people in Delhi use pvt transport. Public transport has to be available on a much larger scale. Better than 1,000 electric buses it's preferable to have 4,000 CNG buses so more ppl can switch to those: @KarthikGanesan6
@SukirtiDwivedi https://twitter.com/ndtvvideos/status/1320804879640621057
Most people in Delhi use pvt transport. Public transport has to be available on a much larger scale. Better than 1,000 electric buses it's preferable to have 4,000 CNG buses so more ppl can switch to those: @KarthikGanesan6
@SukirtiDwivedi https://twitter.com/ndtvvideos/status/1320804879640621057
. @GhoshArunabha's proposals for the mooted #airpollution law
1. Mandate #Mission808080
2. Be more incisive at the sectoral level; if there has to be burning, it has to be scientific, based on wind speed, direction etc
3. Focus on real-time enforcement capability
@ndtv @sanket
1. Mandate #Mission808080
2. Be more incisive at the sectoral level; if there has to be burning, it has to be scientific, based on wind speed, direction etc
3. Focus on real-time enforcement capability
@ndtv @sanket
#airpollution
Relatively high surface winds in PB on Wednesday favoured downwind transport of smoke. Calm surface wind+low night-time mixing height hindered dispersion of local pollution in Delhi, leading to
PM 2.5 levels on Thursday: @KurinjiSelvaraj https://timesofindia.indiatimes.com/city/delhi/farm-fires-hit-seasons-peak-share-in-pm2-5-rises-to-36/articleshow/78942153.cms
Relatively high surface winds in PB on Wednesday favoured downwind transport of smoke. Calm surface wind+low night-time mixing height hindered dispersion of local pollution in Delhi, leading to
PM 2.5 levels on Thursday: @KurinjiSelvaraj https://timesofindia.indiatimes.com/city/delhi/farm-fires-hit-seasons-peak-share-in-pm2-5-rises-to-36/articleshow/78942153.cms
#Airpollution #stubbleburning
Over the last few days, fires have progressed in Sangrur, Patiala, Gurdaspur, Kapurthala, Faridkot and Bhatinda districts of Punjab. In Haryana, crop fires were mostly seen in Karnal, Kaithal, Kurukshetra, Ambala and Fatehabad: @KurinjiSelvaraj
Over the last few days, fires have progressed in Sangrur, Patiala, Gurdaspur, Kapurthala, Faridkot and Bhatinda districts of Punjab. In Haryana, crop fires were mostly seen in Karnal, Kaithal, Kurukshetra, Ambala and Fatehabad: @KurinjiSelvaraj
#Airpollution
In the news: Our amateur experiment using an air purifier to test its effectiveness in an outdoor space.
Read: https://timesofindia.indiatimes.com/city/delhi/why-smog-tower-replica-doesnt-bring-good-news/articleshow/79008201.cms by @JasjeevSinghTOI via @timesofindia
Read about the experiment: http://bit.ly/CEEW-Outdoorpurifiers
#smogtower #cleanairforall
In the news: Our amateur experiment using an air purifier to test its effectiveness in an outdoor space.
Read: https://timesofindia.indiatimes.com/city/delhi/why-smog-tower-replica-doesnt-bring-good-news/articleshow/79008201.cms by @JasjeevSinghTOI via @timesofindia
Read about the experiment: http://bit.ly/CEEW-Outdoorpurifiers
#smogtower #cleanairforall
#AirPollution
Meteorological parameters like wind speed & direction & mixing height influence the dispersion of pollutants. On Nov 1, PM2.5 level crossed 500 ug/m3 for a couple of hrs in the morning. But due to improved wind speed, the PM level fell by evening: @KurinjiSelvaraj
Meteorological parameters like wind speed & direction & mixing height influence the dispersion of pollutants. On Nov 1, PM2.5 level crossed 500 ug/m3 for a couple of hrs in the morning. But due to improved wind speed, the PM level fell by evening: @KurinjiSelvaraj
#AirPollution
Area under paddy cultivation is ~10% < 2018 (CEEW analysis). Last few yrs, burning peaked in the 1st week of Nov. #Stubbleburning may be spread out this yr due to early harvesting, which may be over by 2nd week of Nov: @KurinjiSelvaraj https://timesofindia.indiatimes.com/city/delhi/bitter-harvest-stubble-burning-up-36-this-oct/articleshow/79029836.cms
Area under paddy cultivation is ~10% < 2018 (CEEW analysis). Last few yrs, burning peaked in the 1st week of Nov. #Stubbleburning may be spread out this yr due to early harvesting, which may be over by 2nd week of Nov: @KurinjiSelvaraj https://timesofindia.indiatimes.com/city/delhi/bitter-harvest-stubble-burning-up-36-this-oct/articleshow/79029836.cms
#Airpollution
What led to 'severe' AQ in Delhi yesterday?
The rise in PM2.5 values on Nov 4 can be explained by low wind speed (<7km/hr) & the solar radiation (<300 W/m2) which resulted in a low mixing height during the day: @tanushree_g https://timesofindia.indiatimes.com/city/delhi/thick-haze-wraps-delhi-pm2-5-10x-of-safe-level/articleshow/79052250.cms
@JasjeevSinghTOI
What led to 'severe' AQ in Delhi yesterday?
The rise in PM2.5 values on Nov 4 can be explained by low wind speed (<7km/hr) & the solar radiation (<300 W/m2) which resulted in a low mixing height during the day: @tanushree_g https://timesofindia.indiatimes.com/city/delhi/thick-haze-wraps-delhi-pm2-5-10x-of-safe-level/articleshow/79052250.cms
@JasjeevSinghTOI
#AirPollution #DelhiPollution
The smog might clear in the next couple of days due to changes in meteorological conditions. But the PM2.5 levels will continue to remain well over 60 ug/m3 in all likelihood in the coming days: @tanushree_g on @ndtv @VishnuNDTV
The smog might clear in the next couple of days due to changes in meteorological conditions. But the PM2.5 levels will continue to remain well over 60 ug/m3 in all likelihood in the coming days: @tanushree_g on @ndtv @VishnuNDTV
#Airpollution
The new commission for AQ should take advantage of Delhi’s air quality forecasting system to guide executive agencies & take pre-emptive measures rather than reacting to severe air pollution episodes: @tanushree_g
#DelhiAirQuality https://timesofindia.indiatimes.com/city/delhi/very-poor-is-delhis-best-show-in-7-days/articleshow/79182044.cms
The new commission for AQ should take advantage of Delhi’s air quality forecasting system to guide executive agencies & take pre-emptive measures rather than reacting to severe air pollution episodes: @tanushree_g
#DelhiAirQuality https://timesofindia.indiatimes.com/city/delhi/very-poor-is-delhis-best-show-in-7-days/articleshow/79182044.cms
