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Chlorophyll a in Antarctic sea ice from historical ice core data

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posted on 2023-05-17, 14:24 authored by Klaus MeinersKlaus Meiners, Vancoppenolle, M, Thanassekos, S, Dieckmann, GS, Thomas, DN, Tison, J-L, Arrigo, KR, Garrison, DL, Andrew McMinnAndrew McMinn, Delphine LannuzelDelphine Lannuzel, Pier van der MerwePier van der Merwe, Kerrie SwadlingKerrie Swadling, Smith Jr, WO, Melnikov, I, Ben Raymond
Sea ice core chlorophyll a data are used to describe the seasonal, regional and vertical distribution of algal biomass in Southern Ocean pack ice. The Antarctic Sea Ice Processes and Climate – Biology (ASPeCt – Bio) circumpolar dataset consists of 1300 ice cores collected during 32 cruises over a period of 25 years. The analyses show that integrated sea ice chlorophyll a peaks in early spring and late austral summer, which is consistent with theories on light and nutrient limitation. The results indicate that on a circum-Antarctic scale, surface, internal and bottom sea ice layers contribute equally to integrated biomass, but vertical distribution shows distinct differences among six regions around the continent. The vertical distribution of sea ice algal biomass depends on sea ice thickness, with surface communities most commonly associated with thin ice (<0.4 m), and ice of moderate thickness (0.4–1.0 m) having the highest probability of forming bottom communities.

History

Publication title

Geophysical Research Letters

Volume

39

Issue

21

Article number

L21602

Number

L21602

Pagination

1-5

ISSN

0094-8276

Department/School

Institute for Marine and Antarctic Studies

Publisher

Amer Geophysical Union

Place of publication

2000 Florida Ave Nw, Washington, USA, Dc, 20009

Rights statement

Copyright 2012 American Geophysical Union

Repository Status

  • Open

Socio-economic Objectives

Biodiversity in Antarctic and Southern Ocean environments

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