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Dr. Sonia I. Seneviratne Profile picture
Dr. Sonia I. Seneviratne
@SISeneviratne
Professor @ETH_en, #climate #climatechange #drought #heatwaves, @IPCC_CH AR6 (CLA, #extremes), SR15 & SREX. Citizen/mum/wife, like books/history. Tweets my own.
Apr 4, 2022 • 10 tweets • 7 min read
Many thanks to the @IPCC_CH WG3 authors for this essential report. Some key take-home messages: 1) despite the known urgency, greenhouse gas emissions have still increased in last decade. They are at their highest level ever. The main culprit: fossil fuels (petrol, gas, coal). 2) For a breakdown of CO2 emissions, which need to be brought to zero for climate stabilisation, see also the @IPCC_CH WG1 report, ch5 (Fig. 5.5), explicitly showing the causes: petrol (oil), gas, coal; and land use change. ipcc.ch/report/ar6/wg1/
Oct 18, 2019 • 4 tweets • 3 min read
"Switzerland: Economic aspects of a transition to a 1.5°C world": You can find the excellent presentation from @PhThalmannEPFL at the @ETH_en Atmospheric and Climate Colloquium under the following link:
infoscience.epfl.ch/record/271140?…
Thanks, Philippe for this stimulating seminar! @PhThalmannEPFL @ETH_en Some key messages:
1) No exact numbers for a 1.5°C pathway, but economic pathways for Switzerland that would be consistent with limitation of global warming at 2°C would "only" cost 1% of overall consumption per household. Does not seem a lot in view of benefits!
Jul 5, 2019 • 6 tweets • 4 min read
Interesting paper from @CrowtherLab, but I share concerns on communication expressed by @pepcanadell. It should be recognised that getting to a net-zero CO2 budget requires us foremost to reduce CO2 emissions close to 0. This can unfortunately not be achieved with planting trees. A few additional points not addressed in @pepcanadell's thread, which are important to consider when planning reforestation:
First, reforestation may lead to a net warming in some regions, due to albedo effects (e.g. snow shading), as shown in e.g. papers of @richardabetts.
Jun 23, 2019 • 23 tweets • 13 min read
Message to fellow climate scientists & #ClimateTwitter: After seeing many variations on theme "Are we going to reach a catastrophe in 12 years?”, I think it could be more helpful if we were focusing instead on: "How much climate change can still be considered safe?” (Thread; 1/n) This thread builds upon my recent @theAGU webinar (see below) and the @IPCC_CH #SR15 report… (2/n)
Jun 19, 2019 • 12 tweets • 27 min read
@PierreGentine @KaighinMcColl @AGUecohydro @reedh2o @UGent_LHWM Some questions in our group:
1. How large are the interactions between the terrestrial water and carbon cycles (both CO2 effects on hydrology, and soil moisture/hydrology effects on plant CO2 uptake)?, e.g. following on this study:
@PierreGentine @KaighinMcColl @AGUecohydro @reedh2o @UGent_LHWM 2. How can we further constrain drought projections and related feedbacks to temperature and precipitation, for instance using observationally-based emergent constraints?, i.e. following up on this study:
Dec 18, 2018 • 5 tweets • 6 min read
Following #cop24, check the storylines we derived in the @IPCC_CH #SR15 report for possible futures at a) +1.5°C without overshoot, b) +2°C, and c) +3°C. They start in 2020, when the #ParisAgreement comes into force. We have 2 critical years ahead. iacweb.ethz.ch/staff//sonia/d… For full report (still proofs version), see: ipcc.ch/site/assets/up… (checked with @anna_pirani that it was ok to share the text of the storylines here!). @valmasdel