R Subramanian (he/him)
@rsubramanian.com
Scientist
#AirQuality #AirPollution #AirSensors #methane #soot 🇺🇲 🇷🇼 🇮🇳 🇶🇦🇫🇷
Based in Bengaluru, India. See #IndiaAQ for work posts.
#AirQuality #AirPollution #AirSensors #methane #soot 🇺🇲 🇷🇼 🇮🇳 🇶🇦🇫🇷
Based in Bengaluru, India. See #IndiaAQ for work posts.
JCO is funny, but... As someone who has actually lived in more than two countries and is the product of a migrant family even within India - that's such a a weird thing to say.
Humans have always been nomadic. It's staying in place that is unusual, but you do you, I don't judge.
Humans have always been nomadic. It's staying in place that is unusual, but you do you, I don't judge.
November 11, 2025 at 7:27 PM
JCO is funny, but... As someone who has actually lived in more than two countries and is the product of a migrant family even within India - that's such a a weird thing to say.
Humans have always been nomadic. It's staying in place that is unusual, but you do you, I don't judge.
Humans have always been nomadic. It's staying in place that is unusual, but you do you, I don't judge.
How is it already three years since that momentous sporting event?
November 7, 2025 at 12:47 PM
How is it already three years since that momentous sporting event?
Anyway, good to know that @wired.com remembers I started their subscription process.
It would be nice if the website remembered I also completed said process.
It would be nice if the website remembered I also completed said process.
October 31, 2025 at 8:55 PM
Anyway, good to know that @wired.com remembers I started their subscription process.
It would be nice if the website remembered I also completed said process.
It would be nice if the website remembered I also completed said process.
OMG a young Kumail Nanjiani in Veep??
October 31, 2025 at 5:30 PM
OMG a young Kumail Nanjiani in Veep??
Aren't most of the drugs coming in over land already? This is a figure from 2009, I see more recent Trump I and Trump II news articles saying the same thing.
October 31, 2025 at 11:56 AM
Aren't most of the drugs coming in over land already? This is a figure from 2009, I see more recent Trump I and Trump II news articles saying the same thing.
Parlour palm and freshly potted Clitoria ternatea/aparajita (I thought it was shankapushpam.)
October 31, 2025 at 6:44 AM
Parlour palm and freshly potted Clitoria ternatea/aparajita (I thought it was shankapushpam.)
New flowering plants! A large flaming orange hibiscus, Painter's Palette, sadabahar, and Florist Kalanchoe (?) There's also a parlour palm, see next post.
October 31, 2025 at 6:38 AM
New flowering plants! A large flaming orange hibiscus, Painter's Palette, sadabahar, and Florist Kalanchoe (?) There's also a parlour palm, see next post.
Flower update: three Hibiscus blooms, three each of red and yellow roses, pink Nerium oleander flowers.
October 31, 2025 at 3:22 AM
Flower update: three Hibiscus blooms, three each of red and yellow roses, pink Nerium oleander flowers.
She, Dylan Byers, and others were why I unsubscribed from Puck...
October 31, 2025 at 3:13 AM
She, Dylan Byers, and others were why I unsubscribed from Puck...
Me, leaving Pittsburgh in November 2018 for Paris. Last GF pizza (Joe's in Swissvale?), all my stuff (gave a lot of it away, including three bicycles, books, and cookware), the Pittsburgh sunset.
October 27, 2025 at 5:04 AM
Me, leaving Pittsburgh in November 2018 for Paris. Last GF pizza (Joe's in Swissvale?), all my stuff (gave a lot of it away, including three bicycles, books, and cookware), the Pittsburgh sunset.
Flower update: red and yellow roses, nerium oleander, hibiscus, asytasia gangetica (foxglove?)... Balcony garden inspired by a story shared in @katharinehayhoe.com's newsletter.
October 27, 2025 at 3:54 AM
Flower update: red and yellow roses, nerium oleander, hibiscus, asytasia gangetica (foxglove?)... Balcony garden inspired by a story shared in @katharinehayhoe.com's newsletter.
Mint has an explainer on India's official AQI and...makes a mistake in trying to show the system as worse than it actually is.
The 24-h average AQI will be reported as the average of 24 hourly values (PM is usually reported as hourly averages), not as the average of two 12-hour averages. #IndiaAQ
The 24-h average AQI will be reported as the average of 24 hourly values (PM is usually reported as hourly averages), not as the average of two 12-hour averages. #IndiaAQ
![Plus, there's a big drawback in India's official system. It caps the sub-index of each pollutant at 500, no matter how big the actual calculated value is. The 24-hour average uses capped values, thus severely downplaying the reality on the worst days.
Imagine a situation where the actual uncapped AQI at a location (after adjusting the concentration levels of all pollutants to a comparable scale) comes out to be 1,500 in one half of the day, and 300 in the second half (usually the daytime is cleaner). The CPCB will report the 24-hour average as the average of 500 (instead of 1,500) and 300, i.e. 400. [Subu: this is a stupid mistake by Mint. CPCB will not report the 24-h average as the average of the two 12-hour averages!]
That doesn't reflect the reality at all:
if left uncapped, the average would have been 900. This means the 24-hour average can never exceed 500, even when other indices cry 1,000 or stop measuring altogether.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:fyvwqvscmpp4kl2trgit4fp2/bafkreiadectlj6mmkdc2du2c7b2vobyfqqlk2kc56nyaah3fpd6cw32ja4@jpeg)
October 26, 2025 at 3:22 PM
Mint has an explainer on India's official AQI and...makes a mistake in trying to show the system as worse than it actually is.
The 24-h average AQI will be reported as the average of 24 hourly values (PM is usually reported as hourly averages), not as the average of two 12-hour averages. #IndiaAQ
The 24-h average AQI will be reported as the average of 24 hourly values (PM is usually reported as hourly averages), not as the average of two 12-hour averages. #IndiaAQ
Nice to see birds come to visit the flowers. This may be a purple-rumped sunbird. (The balcony garden was inspired by a @katharinehayhoe.com newsletter.)
October 25, 2025 at 4:07 PM
Nice to see birds come to visit the flowers. This may be a purple-rumped sunbird. (The balcony garden was inspired by a @katharinehayhoe.com newsletter.)
Qatar could even contribute! (Image from prizmaenergy.com/projects/)
October 25, 2025 at 10:36 AM
Qatar could even contribute! (Image from prizmaenergy.com/projects/)
With Google magic - a stylized photo!
October 25, 2025 at 3:09 AM
With Google magic - a stylized photo!
If you want to experience Delhi's air quality, try cooking at home! #IndiaAQ #microOpEd
October 24, 2025 at 8:34 AM
If you want to experience Delhi's air quality, try cooking at home! #IndiaAQ #microOpEd
One piece of progress is getting the roses budding again, and keeping mealy bugs off the hibiscus plant.
October 24, 2025 at 3:25 AM
One piece of progress is getting the roses budding again, and keeping mealy bugs off the hibiscus plant.
And 85% say treating people with kindness.
Yet, about 60% of Christians voted for Donald Trump. edition.cnn.com/election/202...
Yet, about 60% of Christians voted for Donald Trump. edition.cnn.com/election/202...
October 22, 2025 at 1:22 PM
And 85% say treating people with kindness.
Yet, about 60% of Christians voted for Donald Trump. edition.cnn.com/election/202...
Yet, about 60% of Christians voted for Donald Trump. edition.cnn.com/election/202...
Wayne Manor turned into... Tinder?
October 17, 2025 at 9:30 AM
Wayne Manor turned into... Tinder?
Choose the person icon at the bottom, you should see a Union Jack at the top right. Click that to get to the second screen, where you can choose the country and currency.
October 13, 2025 at 11:30 AM
Choose the person icon at the bottom, you should see a Union Jack at the top right. Click that to get to the second screen, where you can choose the country and currency.
Has Donald Trump truthed yet?
October 10, 2025 at 12:08 PM
Has Donald Trump truthed yet?
After a full day at work (revising a proposal + making a personal website), decided to make the dessert I have been craving.
Mung dal halwa. Not very sweet, probably less ghee than what you normally get. (Brar said he also used only 2/3rd of what people usually put.)
Mung dal halwa. Not very sweet, probably less ghee than what you normally get. (Brar said he also used only 2/3rd of what people usually put.)
October 8, 2025 at 2:25 PM
After a full day at work (revising a proposal + making a personal website), decided to make the dessert I have been craving.
Mung dal halwa. Not very sweet, probably less ghee than what you normally get. (Brar said he also used only 2/3rd of what people usually put.)
Mung dal halwa. Not very sweet, probably less ghee than what you normally get. (Brar said he also used only 2/3rd of what people usually put.)
This is an incredibly unique, beautiful watch.
October 7, 2025 at 6:13 AM
This is an incredibly unique, beautiful watch.
My reaction to that:
October 6, 2025 at 1:49 PM
My reaction to that:
x.com/sama/status/...
Imagine if even $1 trillion was invested in actual science instead.
Imagine if even $1 trillion was invested in actual science instead.
October 3, 2025 at 2:36 AM
x.com/sama/status/...
Imagine if even $1 trillion was invested in actual science instead.
Imagine if even $1 trillion was invested in actual science instead.