Oliver Pollard has released a fork of my ice sheet reconstruction software, ICESHEET. I haven't checked in detail, but it looks like this version will take in NetCDF files, making it nicer to use with other programs like Generic Mapping Tools. #IceSheets#Paleoclimatehttps://github.com/oliverpollard/icesheet
Marra et al date two shoreline deposits in the west side of Italy, which correspond to the MIS 5e interglacial and MIS 5c interstadial. They found that the MIS 5c sea level was similar to present day. Even accounting for tectonic uplift, which seems relatively small considering the elevation of the MIS 5e deposit at 9.5 m, this site implies much higher sea level than infered from marine δ¹⁸O records. #paleoclimate#SeaLevel#PaleoSeaLevel#LastInterglacialhttps://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023PA004679
Paul Beckwith: What a record of Atmospheric CO2 Levels over Last 66 million years tells us about our Future
"A new peer reviewed paper published gives us the most up-to-date and accurate record of atmospheric CO2 levels over the past 66 million years." https://www.youtube.com/watch?v=S_6W-Tb3qT0#PaleoClimate
Richards et al determine an estimate of global mean sea level for the Mid-Pliocene (~3 million years ago) using a dynamic topography model constrained using sea level indicators in Australia. They estimate that sea level was about 16 m higher than present, which would correspond to Greenland and West Antarctica completely retreating, with a possibility of part of East Antarctica retreating as well. #PaleoClimate#SeaLevel#IceSheets#ClimateChangehttps://www.science.org/doi/full/10.1126/sciadv.adg3035
Shackleton et al reconstruct the Earth's energy balance for the past 150 thousand years from δ¹⁸O in benthic foraminifera by utilizing the fact that the amount of energy required to heat/cool the ocean and melt/freeze glacial ice is roughly the same. Their technique does not require a separation of the ice sheet and ocean temperature components of δ¹⁸O. #paleoclimate#IceSheets#ClimateChangehttps://www.nature.com/articles/s41561-023-01250-y
A cold front is bringing more winter-like temps in S. America.
High winds trigger #dust plumes (yellow) to the north , this is out of the normal as the normal patterns of dust and smoke transport are from north to south.
There is a chance that this dust can reach the Amazons, which is possible although unlike conventional wisdom since it is expected to have dust from the Sahara.
Paleoclimate holds the key to predicting future changes, understanding environmental responses, and refining climate models for more precise projections. On #W1D4 Sloane Garelick will guide throught a series of tutorials where you'll learn about ice cores and isotopes, computational tools to interpret paloclimate data and how to interpret paleoclimate model simulation.
"Past Climates Inform Our Future" by Julien Emile Geay is the perfect reference before jumping into earth's climate history.
But WAS this the hottest day in 125,000 years? Climate Scientists are a contentious bunch & I actually did that simulation at #NASA GISS so hold my beverage while I check.
Its tough comparing the heat (cold/rain/etc.) of a single day against a time period where you don't have that kind of time resolution let alone spatial coverage #paleoclimate observations
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Hello #Mastodon 👋 ! I am an Associate Professor in the Department of Earth Sciences at the University of Memphis.
I am a broadly trained atmospheric scientist who uses a wide array of datasets including modern data, early instrumental and documentary data, and #paleoclimate data from tree rings to investigate extreme #weather and #climate events at a variety of time scales. Further details about me are available at the link below.
A lot of people are following me, so I should give a proper #introduction post. I study #PaleoClimate, specifically how the Earth's surface has changed due to the growth and retreat of ice sheets. During the past 3 million years ago or so, ice sheets waxed and waned over northern North America and Europe, which caused global average sea level to drop as much as 120 m below present. I create models of the changes in ice sheets, and collect geological evidence of sea level change to validate them.
Watching some presentations at #JPGU2023 on the proposed #Anthropocene geological marker at Beppu Bay in Japan. It looks like 1953 is the representative year when all the anthropogenic markers become noticeable. It still remains to be seen if this becomes an official geological boundary! #ClimateChange#Paleoclimate
Big news, I have released version 2.0 of my paleo sea level database, which I now call the Global Archive of Paleo Sea Level Indicators and Proxies (GAPSLIP)! I have completely rewritten the code used to handle the organization and plotting of the data, making it much easier to maintain. I have also added deglacial and Holocene data from Australia and Greenland. Everything is available on Github. #PaleoClimate#SeaLevel#ClimateChangehttps://github.com/evangowan/paleo_sea_level
Current research projects include reconstructing #fire history records from #cave#stalagmites. And monitoring #groundwater#recharge in underground spaces to work out how much rainfall is needed to replenish this water resource.