Sam Stevenson
@slgstevenson
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Climate modeler interested in all things tropical Pacific: past variability, future projections, and remote impacts. Associate prof at UC Santa Barbara
Santa Barbara, CA
Joined September 2014
Update: we're hiring! (again) Postdoc position on climate variability's impact on the @NOAA_CINMS, with Cheryl Harrison and @ryanfreedman collaborating! Link at: https://t.co/zzfLykLlW2 (apply by Feb 15 for first consideration)
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Hello science friends! I'm trying to compile a list of places to access #climate model output for a website I'm developing (coming soon!) and am pretty sure I missed a bunch: who has favorite websites they like to use??
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Our paper on 2k hydroclimate is out today in @NatureGeosci! w/an incredible team of @PAGES_IPO #Iso2k co-authors, incl @npmckay @raindrop_herder @slgstevenson @drmattjones @jonathanjtyler @aquablusee @Elizotope @DrSpeedyDee @iso_topel @HSayani
https://t.co/Hz2VxtMRsq [1/2]
nature.com
Nature Geoscience - Global temperature fluctuations during the last 2,000 years caused consistent changes in ocean evaporation and atmospheric moisture condensation processes, reflected in coherent...
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New paper alert! Field observations from #Palmyra atoll during the 2014-15, 2015-16 #ElNino events show very different isotopic signatures, with big implications for #coral reconstructions. With @coralsncaves, @AR_Atwood, @scubasanchez, and many others!
agupubs.onlinelibrary.wiley.com
A new set of physical oceanographic and oxygen isotopic observations was collected at Palmyra Atoll, spanning two El Niรฑo events Palmyra experienced stronger seawater ฮด18O changes during the weak...
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Our review of ๐ ๐ฒ๐ฐ๐ต๐ฎ๐ป๐ถ๐๐บ๐ ๐ผ๐ณ ๐๐ฟ๐ผ๐ฝ๐ถ๐ฐ๐ฎ๐น ๐ฃ๐ฎ๐ฐ๐ถ๐ณ๐ถ๐ฐ ๐ฑ๐ฒ๐ฐ๐ฎ๐ฑ๐ฎ๐น ๐๐ฎ๐ฟ๐ถ๐ฎ๐ฏ๐ถ๐น๐ถ๐๐, is out today in @NatRevEarthEnv! Led by Antonietta Capotondi & Shayne McGregor, and our @WCRP_CLIVAR Pacific Panel. https://t.co/8PRBYXQvzT
@CIRESnews @MonashUni
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New paper out in @nature today!! Led by the amazing @raindrop_herder, with @other_rock and @drynamics: anthropogenic impacts on the Pacific Walker Circulation insignificant, but volcanoes cause an El Nino-like response https://t.co/IqGm0EQsWi
nature.com
Nature - Analysis of a new annually resolved, multi-method, palaeoproxy-derived reconstruction ensemble for the period 1200โ2000 suggests that recent variability in the Pacific Walker...
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Confirmed human toll from wildland-urban interface #MauiFires is terrible (already second deadliest wildfire in modern American history), but grim reports from residents on the ground suggest actual toll is even greater & that there is still minimal outside assistance. #MauiFire
Wanted to give an update as I have several first responder friends down in Lahaina tonight. Thereโs bodyโs all over town and in the water that have not been accounted for and reported yet. So many people never made it out. There are possibly hundreds dead and even more missing.
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After a years-long saga running our new E3SMv1 ensemble and lots of back and forth with reviewers, I am excited to announce that the description paper is now PUBLISHED! With @manu_ocean and our other wonderful coauthors :)
agupubs.onlinelibrary.wiley.com
We present a new large ensemble with the Energy Exascale Earth System Model v1 (the E3SMv1-LE) initialized using ocean basin heat contrasts Ensemble spread in the 20-member E3SMv1-LE is comparabl...
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New paper out! With Xingying Huang, looking at the @NCAR_Science Multimodel Large Ensemble Archive: knowing how ENSO will respond to #climatechange is crucial for getting #SoCal precipitation correct! https://t.co/fNh8F9lqyL
agupubs.onlinelibrary.wiley.com
The contributions from El Niรฑo/Southern Oscillation (ENSO)-driven SST variability to extreme precipitation are quantified using multiple model ensembles and Coupled Model Intercomparison Project P...
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๐ซ Review Paperโจ "Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers" out today in ERC - check it out! https://t.co/7CDUNvFimv w/ @AdrianaBailey, Jess Conroy, @AR_Atwood, @slgstevenson, Jesse Nusbaumer, @noonetweeting @USCLIVAR
iopscience.iop.org
Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers, Dee, Sylvia, Bailey, Adriana, Conroy, Jessica L, Atwood, Alyssa, Stevenson, Samantha, Nusbaumer,...
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@juliatucson @manu_ocean Last but not least, there's my CAREER project looking at how ocean dynamics including mean-state changes and tropical instability waves affect the ENSO response to climate change! That's this one, which also involves PhD students: https://t.co/EkyObPODpq
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@juliatucson And for another project, I'm working with @manu_ocean, Matt Newman, and Antonietta Capotondi to see how high-res processes affect Pacific decadal variability! That's this one: https://t.co/o70ckNYweT
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I should also mention my great collaborators: @juliatucson and I are working on combining isotope-enabled climate models and coral records to look at how tropical ocean basins have interacted over the last millennium! That's this one: https://t.co/fvZ2IrjVm0
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Exciting times in our group right now! We have THREE postdoc opportunities open: if you or someone you know is into ENSO modeling, Pacific decadal variability, or Last Millennium climate, please share/apply! Full details and job ads available here: https://t.co/5pJAgc2Phv
samanthalstevenson.com
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Our new review paper on Pacific decadal variability is now out! Led by @manu_ocean, with many awesome colleagues including @DillonAmaya and others who aren't on Twitter :)
annualreviews.org
The modes of Pacific decadal-scale variability (PDV), traditionally defined as statistical patterns of variance, reflect to first order the ocean's integration (i.e., reddening) of atmospheric...
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For folks asking how this compares to our hypothetical "ARkStorm 2.0" scenarios published, a very approximate estimate: we've so far experienced about 1/3 to 1/2 the precipitation we'd expect from such a scenario on a statewide basis. #CAwx #CAwater [1/2] https://t.co/z5n9h3IRfk
UPDATED total precipitation for the series of atmospheric rivers that have affected California since December 26, a period of 16 days. In this time California averaged 8.61 inches of precipitation and the San Francisco-Oakland metropolitan statistical area averaged 13.34 inches.
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Another way of looking at it: not a *single* member of the full ECMWF ensemble indicates the current very wet and active pattern will continue past Jan 20-21. A sustained break is coming, but we still have a solid 7-10 days to go first. #CAwx #CAwater
And there is now a plausible end in sight: multi-model ensembles continue to suggest a return to a West Coast ridge pattern in about 9-10 days (by Jan 20)--probably giving folks a much-needed chance to dry out and dig out. #CAwx #CAwater [4/4]
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Fourteen inches of rain in less than 48 hours in the mountains above Santa Barbara-- this is approaching a "once-in-1000-year" storm event. The runoff and erosion from this event will alter the streams and hills for decades to centuries to come! #CAwx
Latest rainfall table as of 8 PM PST. Highest amounts 14.13 inches at Nordhoff Ridge in VTU County & 14.05 inches at San Marcos Pass in SBA County. Highest in L.A. County 6.53 inches at Warm Springs in the mtns. https://t.co/Z7fqkvNq1L
#cawx #SoCal #LAWeather #LARain
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Santa Barbara has received more than third of our average *annual* rainfall in the last ~20 hours. This is an historic meteorological, geomorphological, and human event. Hoping everyone is safe. #cawx #santabarbara #AtmosphericRiver
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this is unbelievably horrible, so sorry Chris and everyone at @uarizona!
Shouting in the dark. And no one heard. For you, Tom. For your family. For the Department of Hydrology and Atmospheric Sciences. For the University of Arizona you loved and were so proud of. https://t.co/dpGtGYPvbu
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