Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula

Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula

9 pages, 6 figures, 6 tables

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Bibliographic Details
Main Authors: Sañé, Elisabet, Isla, Enrique, Grémare, Antoine, Gutt, Julian, Vétion, Gilles, DeMaster, D.J.
Format: artículo biblioteca
Language:English
Published: Elsevier 2011-01
Subjects:Chlorophyll, Sediment, Antarctic Peninsula, Climate change,
Online Access:http://hdl.handle.net/10261/46115
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spelling dig-icm-es-10261-461152020-11-24T08:54:29Z Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula Sañé, Elisabet Isla, Enrique Grémare, Antoine Gutt, Julian Vétion, Gilles DeMaster, D.J. Chlorophyll Sediment Antarctic Peninsula Climate change 9 pages, 6 figures, 6 tables In March 2002, 3200 km2 of the Larsen B ice shelf collapsed off the Eastern Antarctic Peninsula (EAP). In the austral summer of 2006, sea floor sediment was recovered beneath the extinct Larsen B ice shelf and in a region off the Northern Antarctic Peninsula (NAP), which has been free of ice shelves for more than 1000 yr. To assess changes in the chemical composition of the sediment after ice shelf collapses, chlorophylls and pheophytins were measured in sediment cores at six stations. This is the first time that chlorophyll pigments have been analysed in sediment samples from regions under recently collapsed ice shelves. Five years after the ice shelf collapse, Chla and Chlc concentrations were similar in the interfacial sediment (upper 1 cm) of NAP and EAP regions. However, in EAP Chla and Chlc concentrations decreased more rapidly with depth in the sediment column and were negligible below 2 cm depth. The high Chla to Pheoa ratios indicated that sedimentary pigments found in EAP had undergone limited degradation suggesting that they were locally produced rather than laterally advected. Complementary information from excess 210Pb activity and diatom valve distributions provided further evidence that the pigment fluxes to the seabed in EAP took place only after the ice shelf collapse This study was supported by the Spanish Ministry of Science and Innovation, through the project CLIMANT (POL2006- 06399) and the graduate program fellowship FPU AP 2005-5060. Peer reviewed 2012-02-23T11:26:33Z 2012-02-23T11:26:33Z 2011-01 artículo http://purl.org/coar/resource_type/c_6501 Journal of Sea Research 65(1): 94-102 (2011) 1385-1101 http://hdl.handle.net/10261/46115 10.1016/j.seares.2010.07.005 en https://doi.org/10.1016/j.seares.2010.07.005 none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Chlorophyll
Sediment
Antarctic Peninsula
Climate change
Chlorophyll
Sediment
Antarctic Peninsula
Climate change
spellingShingle Chlorophyll
Sediment
Antarctic Peninsula
Climate change
Chlorophyll
Sediment
Antarctic Peninsula
Climate change
Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Gutt, Julian
Vétion, Gilles
DeMaster, D.J.
Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
description 9 pages, 6 figures, 6 tables
format artículo
topic_facet Chlorophyll
Sediment
Antarctic Peninsula
Climate change
author Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Gutt, Julian
Vétion, Gilles
DeMaster, D.J.
author_facet Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Gutt, Julian
Vétion, Gilles
DeMaster, D.J.
author_sort Sañé, Elisabet
title Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
title_short Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
title_full Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
title_fullStr Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
title_full_unstemmed Pigments in sediments beneath recently collapsed ice shelves: The case of Larsen A and B shelves, Antarctic Peninsula
title_sort pigments in sediments beneath recently collapsed ice shelves: the case of larsen a and b shelves, antarctic peninsula
publisher Elsevier
publishDate 2011-01
url http://hdl.handle.net/10261/46115
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