Climate Scientist and #IPCC Lead Author. I put the ocean in a /shell/ and throw that shell back into the ocean. Occasionally that rains back as monsoon stories

Joined June 2008
People in vulnerable areas should already know their local evacuation procedure. Read my op-ed on why we need "disaster preparedness drills" along with this article by Nirajan Siwakoti on how quick decision making and dissemination of danger helped save a few lives during the Tibet-Nepal floods. theconversation.com/nepals-d…
In India, everyone needs a disaster drill. My op-ed in today’s Indian Express on why every school, college, workplace and community should hold mandatory seasonal disaster drills, with one before the heatwave season and another before the monsoon. Read: climate.rocksea.org/images/c…
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How to Survive a Super, Monster, Godzilla El Niño In Hindustan Times, we explain what this El Niño means for food, water, ecosystems and the economy, and how we can prepare. Read: climate.rocksea.org/images/c…
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Roxy Koll ⛈ retweeted
VIDEO | Bangkok, Thailand: On key takeaways from Global Heat Forum, climate scientist Roxy Mathew at the Indian Institute of Tropical Meteorology says, "The core message from the forum and from science is that extreme heat is arriving faster than we anticipated. It is becoming more intense, occurring far more frequently, lasting longer, and getting harder to escape over time. Meanwhile, our response has lacked the speed, intensity, and urgency required to match how heat is impacting us on multiple fronts. We must act urgently, grounded in scientific evidence. Science needs to be converted into actionable data and information to build robust early warning systems that translate directly into protection at the individual, community, and administrative levels in countries like India..." (Full video available on PTI Videos - ptivideos.com)
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Heat will be harder to escape by 2050, when many of us will be older and more vulnerable. Add about 25 years to your age now. Are you prepared! Harder to escape, both in space and time. We come home from a hot day outdoors, expecting relief, but the heat is already in the bedroom, since our housing and urban setup trap the heat. And the nights are getting warmer, and rising humidity makes it harder for our bodies to cool. The good news is that the data help us understand these risks and protect ourselves better. We need to learn how to grow older in a hotter world. Global Heat Forum, Bangkok, 2026
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Roxy Koll ⛈ retweeted
Proud Moment! 🇮🇳🌊 We congratulate Dr. Roxy Mathew Koll on receiving the prestigious Pavel S. Molchanov Climate Communications Prize from the American Geophysical Union (AGU) for his research on Indian Ocean warming. His work has strengthened our understanding of the Indian Ocean and its role in the climate system, while bringing important climate science closer to the public. A proud recognition of India’s contribution to global climate research and science communication. #ProudMoment #Congratulations #ClimateScience #IndianOcean #AGU2026 #MoES @narendramodi @mygovindia @PMOIndia @DrJitendraSingh @OfficeOfDrJS @PIB_India @MIB_India @iitmpune @tummalasrini
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The monsoon index plotted here shows that the monsoon winds and circulation during the June-September season this year was relatively weak (compared to climatological mean).
Replying to @PaulRoundy1
The monsoon winds/circulation were relatively weak and less organized this season. This gave a chance for low pressure systems from the Bay of Bengal and Western Disturbances (WDs) to bring in rains (heavy rains possibly due to intensified water cycle), compensating rainfall deficits over some of the states.
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Pune rains here exemplify the monsoon of contrasts. If we look at the total amount of rainfall during the season, we got 736 mm. If we use that number to characterize the monsoon, it is way above the long-term average of around 600-650 mm... ...but take a closer look, just 3 days delivered nearly half of what Pune normally receives over the entire monsoon season. The rest of the season was almost dead. A seasonal total can hide the real story.
As the monsoon season comes to end, attached is daily variation in Pune shivajinagar rain from 1june-30september. Pune recorded 736.2mm rain this season and out of this half of rain (~53%) occurred in just 1 week (3-9July). This shows highly skewed rainfall pattern. data: IMD
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156 Years of All India Monsoon Rainfall. The 2026 season ends with 13% below normal rainfall.
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Roxy Koll ⛈ retweeted
INDIA’S CLIMATE SCIENCE VOICE, RECOGNISED ON THE WORLD STAGE Dr. Roxy Mathew Koll of the Indian Institute of Tropical Meteorology (IITM), Pune, has been selected for the 2026 Pavel S. Molchanov Climate Communications Prize by the American Geophysical Union (AGU).
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Roxy Koll ⛈ retweeted
Congratulations to Dr Roxy Mathew Koll @RockSea, Non-Resident Fellow at CEEW, on winning the American Geophysical Union @theAGU's 2026 Climate Communications Prize—among the world's foremost recognitions for carrying climate science into public life. A climate scientist at @iitmpune, Roxy has helped document how a warming Indian Ocean is reshaping our monsoons, marine heatwaves, cyclones and extreme rainfall—and what those shifts mean for lives and livelihoods across South Asia. His work reaches well beyond the journal: regional-language newsrooms, classrooms, policy rooms and community early-warning efforts, much of it rooted in the Global South, where the risks are immediate but access to science is not. As Roxy puts it: "If our research does not reach people, policies, and communities in a form they can understand and use, we have left the work unfinished." This is a moment for climate communication from the Global South, and we are proud to count Roxy among our fellows. He will be honoured at AGU26 in San Francisco this December.
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Roxy Koll ⛈ retweeted
Happiness is… a climate journalist with a climate scientist. This, in nutshell, is all about our work. Thank you so much @RockSea for the informative and enthralling session on marine heat and El Nino as part of the #VOICEfellowship2026 #SimplifyingScience
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Sharing a call to action signed by 188 scientists and ecologists from across India, urging researchers and field practitioners to prepare for, document and respond to the ecological impacts of the evolving 2026/27 El Niño. India’s monsoon season is closing with a rainfall deficit, but the impacts may not end there. They can creep into the seasons ahead and cascade through depleted soil moisture and water storage, land and marine heatwaves, forest fires, coral bleaching and less visible ecological changes. The call asks us not only to strengthen monitoring, but also to safeguard the ecosystems that remain and reduce the pressures already weakening them. The full call is available here: zenodo.org/records/22794483
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El Nino, Climate Change, and Dengue. With the monsoon rains, dengue and other infectious diseases have soared up in Kerala --and across India. Our new study shows that temperature, humidity, rainfall and El Niño conditions can be combined to predict dengue risk months in advance. Download and read the study published in @theAGU @AguGeohealth: agupubs.onlinelibrary.wiley.…
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With 7,188 “confirmed” dengue cases, Kerala’s June–August total was about 60% above the previous decade, and more than five times the decade before that. This excludes many asymptomatic, untested and unreported cases. Source: Kerala Directorate of Health Services.
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Guess what these tiny dots in this piece of ice from several meters deep in the Antarctic are? — they are air bubbles. They carry air from tens of thousands of years ago. Which help us measure the carbon dioxide and other gases at that time. Read more on Climate Detectives @SanctuaryAsia: sanctuarynaturefoundation.or…
“Climate Detectives” is out in Sanctuary Asia! How do we study the climate before thermometers? We climate detectives read the clues hidden in air bubbles, tree rings, corals and even bird poo. Read: climate.rocksea.org/images/c…
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**12 Hiroshima bombs. Every second.** That is roughly the equivalent of the **additional heat from global warming going into the ocean**. More in my conversation with @AratiKumarRao on what a Super El Niño means for us, and how it affects the Indian monsoon. youtu.be/vN9p4dUO7O8
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“Climate Detectives” is out in Sanctuary Asia! How do we study the climate before thermometers? We climate detectives read the clues hidden in air bubbles, tree rings, corals and even bird poo. Read: climate.rocksea.org/images/c…
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OpenAI announces that it has created an automated research intern. Next up is an automated scientist, by March 2028. First it replaces my students, then it replaces me. Nice to see that AI respects academic hierarchy. Read OpenAI’s announcement: openai.com/index/research-ac…
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And the discussion now is... whether AI will replace all of us, literally a human extinction: xitter.cf/hilbertspaess/status/2…
I resigned from Anthropic today. I spent the last three years doing pretraining research at both OpenAI and Anthropic. Neither company is acting responsibly. They are racing straight to self-improving superintelligence and gambling with our lives. More thoughts below.
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