Zaretskaya et al present some preliminary results of dating last interglacial (MIS 5e, 130-115 ka) marine deposits from Zimnii Coast of the White Sea in northwestern Russia. They conclude these deposits represent a transgressive event, and some of the enviornmental indicators suggest that the peak sea level coincided with cold, Arctic climatic conditions. The ages they get are kind of young for MIS 5e, though. #SeaLevel #ClimateChange #PaleoClimate #LastInterglacial https://link.springer.com/article/10.1134/S1028334X23601360

Context ^^ CHECK!
Which time wins HOTTEST July?

#LastInterglacial w enhanced northern hemisphere seasonality? Or Present Day w HIGH Greenhouse Gases?

Using the #nasa #climate model GISS-E2.1
*2004-2013 decade w specified sea ice & sea surface temperatures & winds
*LastInterglacial 127000 yrs ago w coupled atmosphere-ocean w orbital & greenhouse gas

Annual #Temperature TODAY is likely greater than Last Interglacial
July temperature LAST INTERGLACIAL are likely greater than Today
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Scientists coordinated w each other to do simulations of the #LastInterglacial using different climate models :

http://dx.doi.org/10.5194/cp-17-63-2021

We simulate 127,000 yrs ago b/c
*orbital forcing made for the most extreme seasonality

* greenhouse gases are also altered to match the fossilized air of 127,000 — basically very similar to year 1850.

* we do NOT have changes to ice sheet extent or sea levels b/c its harder to model, meaning fewer groups participate
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I am a #climate modeler, NOT a #geochemist, so I rely on colleagues for past climate reconstructions. There are MANY scientists that do #paleoclimate for the #LastInterglacial 127,000 yrs ago, usually discrete time series in one place

Jeremy Hoffmann compiled these to create a global estimate of last interglacial sea surface temperature & found SST indistinguishable from 1995-2014
https://doi.org/10.1126/science.aai8464

!sea levels were 5-11 meters higher b/c teeny Greenland and West Antarctic ice sheets!
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For the #LastInterglacial period — we EXPECT there to be greater northern hemisphere summertime #temperatures because of changes to the earths orbit making Incoming SOLar radIATION, insolation, different.

Here’s a #nasa explanation for that
https://climate.nasa.gov/news/2948/milankovitch-orbital-cycles-and-their-role-in-earths-climate/

I prefer this cool vintage interactive #milankovitch calculator:
https://cimss.ssec.wisc.edu/wxfest/Milankovitch/earthorbit.html
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