Research Software Engineer, Associate. Caltech, CliMA.
Pasadena, CA
Joined February 2018
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I often see confusion about how we measure NEE by eddy-covariance, even among scientists.
@AmeriFlux calls turbulent flux of CO2 "FC" and label it "turbulent flux, no storage correction". The "storage correction" is called "SC". ameriflux.lbl.gov/data/about…
Alexandre A. Renchon retweeted
We figured out how much water is in all of Earth’s plants and how long it takes water to flow through them.
Answer: 786 km3 and 5-18 days.
@NatureWaterJnl @koen_hufkens @sciencebyAJ
Alexandre A. Renchon retweeted
I have a new analysis over at The Climate Brink exploring how rates of warming have changed over the past century.
Post-1970, GHGs (CO2, CH4, etc.) would have led to just under 0.2C per decade, but falling aerosols (SO2) have increased that rate to 0.25C.
Alexandre A. Renchon retweeted
1/n
We have just published the new @gcarbonproject Global Carbon Budget, 2024.
It contains a mix of bad news and some less bad news. The latter signals some progress, albeit slow, towards decarbonizing the global economy.
essd.copernicus.org/preprint…
Alexandre A. Renchon retweeted
The exponential growth of solar + wind energy continues to be astonishing
Alexandre A. Renchon retweeted
Today, I’m excited to share with you all the fruit of our effort at @OpenAI to create AI models capable of truly general reasoning: OpenAI's new o1 model series! (aka 🍓) Let me explain 🧵 1/
Alexandre A. Renchon retweeted
Thrilled to see this paper published - an international collaborative work involving modellers and experimentalists. We assessed the C-P interactions in models and their responses to elevated CO2 @westsyduhie @westernsydneyu @ZJU_China
A new study on Eucalyptus forests adds to evidence that the global CO2-driven carbon sink may be overestimated by models.
Learn more in this week’s issue of Science Advances: scim.ag/7yc
Alexandre A. Renchon retweeted
Our new paper lines up P-enabled vegetation models against results from #EucFACE experiment and asks: how did they do? Congrats @jiangmingkai for a huge effort co-ordinating modelling and experimental communities! @westernsydneyu @westsyduhie
A new study on Eucalyptus forests adds to evidence that the global CO2-driven carbon sink may be overestimated by models.
Learn more in this week’s issue of Science Advances: scim.ag/7yc
Alexandre A. Renchon retweeted
NASA JPL team hopes to give greenhouse gas-monitoring satellite 'unprecedented' vision -- A nice story about the past and future of our GHG measurements latimes.com/environment/stor…
Alexandre A. Renchon retweeted
Excited to see the hard-won #EucFACE Phosphorus budget published in @springernature today. Many thanks to lead authors @jiangmingkai and Kristine Crous!
New research published today in @SpringerNature shows that mature eucalyptus trees don’t increase their growth with increased carbon dioxide in the atmosphere, which was expected to boost plant growth, due to soil microbes restricting their access to the essential nutrient phosphorus.
It is generally thought that increasing levels of CO2 in the atmosphere stimulates plant growth. However, the new study led by Western Sydney University @westsyduhie provides an important counterpoint to this long-held view 🍃🌿 MORE bit.ly/3KsylVc
ALT Western Sydney University’s Eucalyptus Free Air CO2 Enrichment (EucFACE) experiment, Australia's largest climate change research project. The trees at EucFACE reach to 25 metres in height, with extra CO2 added through a computer-controlled system in the out-of-doors. Over six years, researchers exposed a 100-year-old eucalypt woodland on Western Sydney’s Cumberland Plain to elevated carbon dioxide levels. The team undertook in-depth sampling of phosphorus in all parts of the ecosystem to trace its journey from the soil to the trees. IMAGE CREDIT: SALLY TSOUTAS
Alexandre A. Renchon retweeted
Satellite signals can measure a forest’s moisture—and its ability to survive -- nice writeup on @YitongYao's paper science.org/content/article/…
Alexandre A. Renchon retweeted
Congrats to @YitongYao on her just published GRL paper "Investigating Diurnal and Seasonal Cycles of Vegetation Optical Depth Retrieved From GNSS Signals in a Broadleaf Forest" @vwhumphrey @BiogeoYi @yinonbaron @NatanHoltzman ...
rsfralab.github.io/BlogPosts…
agupubs.onlinelibrary.wiley.…
Alexandre A. Renchon retweeted
Five minute GPP estimates from ALIVE on June 6, 2023. The dark smear across southern MN and other parts of the midwest are our estimates of the impact of Canadian wildfire smoke on ecosystem carbon uptake: alive-abi.github.io/alive/ju… @DanielleLosos
Alexandre A. Renchon retweeted
All global environmental (open) data sets listed at one place: openlandmap.github.io/book/c…
If you are aware of some relevant open global data set that we have maybe missed, please post here, or edit the document directly via Github. Thank you! @EarthMonitorOrg #OpenLandMap
Alexandre A. Renchon retweeted
Global Temperature Rise by Country (2022-2100P) 🌡️
In partnership with @_NPUC, this visual is a part of our Decarbonization Channel—shining a light on the progress towards net zero goals in the U.S. 🍃
See maps for 2022 temperatures and 2100 projections:
decarbonization.visualcapita…
Alexandre A. Renchon retweeted
🌱 Exciting opportunity at NYU Environmental Studies! We're looking for two postdocs to explore the global methane budget or urban heat and climate extremes. Join us in advancing climate research! 🌍 Please RT to spread the word! apply.interfolio.com/136788
Alexandre A. Renchon retweeted
Heading to Vienna #BiDS23 @EO_OPEN_SCIENCE to show how we use @JuliaLanguage and @MakiePlots to analyse large geospatial data, I will be doing some data cubes @DeepCube_H2020 showing @ClaireRobin01 research @Ellis_Unit_Jena. If you are around and want to talk, say Hi!
ESM as a puzzle: making CliMA accessible piece by piece clima.caltech.edu/2023/09/28…
Alexandre A. Renchon retweeted
"A perspective on the next generation of Earth system model scenarios: towards representative emission pathways (REPs)".
Ms., pre-print.
Comment on it to improve the next generation of framing pathways to guide mitigation & adaptation.
@meinshausen
gmd.copernicus.org/preprints…
Alexandre A. Renchon retweeted
Scientific journals were created to disseminate science, not the other way around. The fact that fitting a narrative becomes necessary for publishing in certain journals speaks to the failure of the current academic evaluation system. Science has to be rescued from impact factors
Alexandre A. Renchon retweeted
#CopernicusAtmosphere is monitoring the early stages of this year's Antarctic ozone hole, which is occurring slightly earlier compared to 2021 and 2022.
Watch the 2023 ozone hole development. More #OzoneInsights coming soon👉 atmosphere.copernicus.eu/mon…