Lmst

Land-Sea Linkages In The Arctic – What Is Paleoclimatology?
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https://www.usgs.gov/programs/ecosystems-land-change-science-program/science/land-sea-linkages-arctic <-- shared technical article
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https://doi.org/10.1371/journal.pclm.0000333 <-- shared example of paper
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https://doi.org/10.47894/mpal.69.3.04 <-- shared example of paper
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[who doesn’t like a good foraminifera! (memories of staring down a microscope for hours at grad school) 😊 ]
#fedscience #Paleoclimatology #Paleoecology #Paleooceanography #Icesheet #climatechange #Paleoanthropology #Seaice #Marineecosystems #GIS #spatial #mapping #spatialanalysis #model #modeling #spatiotemporal #foraminifera #arctic #change #cryosphere #ArcticOcean #glacial #interglacial #Holocene #future

Large parts of eastern Europe and western Asia used to be covered by a freshwater lake bigger than the Mediterranean.

#PaleoOceanography #ParatethysSea #geology #fossils #PlateTectonics

https://www.science.org/content/article/rise-and-fall-world-s-largest-lake

Sunday #Plankton Factoid 🦠🦐
Another #paleooceanography #zooplankton are the beautiful #Pteropoda sea butterflies & sea angels, holoplanktonic mollusks with modified parapodia swimming foot. They live in surface waters of every ocean, and are vital to the #CarbonCycle. Their delicate calcium carbonate shells dissolve away quickly, so fossils only really found in the shallow tropics sediments. Fun fact: can be so dense as to create false bottom signals in echosounders.
https://twilightzone.whoi.edu/explore-the-otz/creature-features/pteropod/

Transparent delicate angel-like plankton with deep orange head and gut with thin transparent wings against a black background. Clione limacina

Transparent helical shell of a swimming mollusk against a black background with prismatic colors showing from the grooves on the shell. Winged foot extends out from the shell opening. Limacina helicina

Sunday #Plankton Factoid 🦠🦐
Next #zooplankton important to #paleooceanography with a long geological record are #Foramanifera. Like #Radiolaria forams are unicellular amoeboid protozoa, planktonic or benthic with spectacular shaped Tests made of mostly calcium carbonate with pores they exude pseudopodia to capture prey or uptake DOC. Some have symbiotic algae. Known for millenia, but their complicated life cycles, alternating haploid and diploid aren't well documented.
https://en.m.wikipedia.org/wiki/Foraminifera

Spectacularly varied colored images of many diverse shaped Foraminifera. Most are globular shaped but some have extensions. Bar across the bottom indicates 200 microns, most are slightly larger than this. For full description see linked Wikipedia article (Ecology section).

Many images of globular shaped fossils studded with many pores. Scanning electron micrograph of foram tests from a Georgia quarry. Source https://thenaturalhistorian.com/2015/02/26/forams-vs-diatoms-testing-young-earth-flood-geology-hypotheses/

Map of the world's ocean sediments. The Foraminifera deposits are offshore most of the oceans shown in blue.

Sunday #Plankton Factoid 🦠🦐
Next posts are on #zooplankton which form the sediments of the seafloor. Starting with #Radiolaria, single-celled amoeboid protozoa. Non-motile but control buoyancy with gas vacuoles. Known for spectacularly intricate cortical shells made of siliceous opal covered by an extended cytoplasm they use to engulf plankton and detritus. The shells (radiolarian-ooze) cover large swaths of the tropics and are used in the study of #paleooceanography.
https://www.radiolaria.org/what_are_radiolarians.php

Map of the world's ocean sediments with four main classes: red for neretic, yellow abyssal clay, blue calcareous ooze (foraminifera, pteropod) and silicious ooze (diatom, radiolarian) in green. Radiolarian ooze are along the pacific equator and larger sections of the Indian Ocean.

Spectacular shapes of white ornate skeletons of radiolarians against a black background. Many have spines and patterned shells.

.. and be re-energised by the next generation! #paleooceanography #climate

#Paleooceanography

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