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Chlorophyll-a in Antarctic Landfast Sea Ice : A First Synthesis of Historical Ice Core Data

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Title: Chlorophyll-a in Antarctic Landfast Sea Ice : A First Synthesis of Historical Ice Core Data
Authors: Meiners, K. M. Browse this author
Vancoppenolle, M. Browse this author
Carnat, G. Browse this author
Castellani, G. Browse this author
Delille, B. Browse this author
Delille, D. Browse this author
Dieckmann, G. S. Browse this author
Flores, H. Browse this author
Fripiat, F. Browse this author
Grotti, M. Browse this author
Lange, B. A. Browse this author
Lannuzel, D. Browse this author
Martin, A. Browse this author
McMinn, A. Browse this author
Nomura, D. Browse this author →KAKEN DB
Peeken, I. Browse this author
Rivaro, P. Browse this author
Ryan, K. G. Browse this author
Stefels, J. Browse this author
Swadling, K. M. Browse this author
Thomas, D. N. Browse this author
Tison, J.-L. Browse this author
van der Merwe, P. Browse this author
van Leeuwe, M. A. Browse this author
Weldrick, C. Browse this author
Yang, E. J. Browse this author
Keywords: Antarctica
fast ice
ice algae
Issue Date: 20-Dec-2018
Journal Title: Journal of Geophysical Research : Oceans
Volume: 123
Issue: 11
Start Page: 8444
End Page: 8459
Publisher DOI: 10.1029/2018JC014245
Abstract: Historical sea ice core chlorophyll‐a (Chla) data are used to describe the seasonal, regional, and vertical distribution of ice algal biomass in Antarctic landfast sea ice. The analyses are based on the Antarctic Fast Ice Algae Chlorophyll‐a data set, a compilation of currently available sea ice Chla data from landfast sea ice cores collected at circum‐Antarctic nearshore locations between 1970 and 2015. Ice cores were typically sampled from thermodynamically grown first‐year ice and have thin snow depths (mean = 0.052 ± 0.097 m). The data set comprises 888 ice cores, including 404 full vertical profile cores. Integrated ice algal Chla biomass (range: <0.1–219.9 mg/m2, median = 4.4 mg/m2, interquartile range = 9.9 mg/m2) peaks in late spring and shows elevated levels in autumn. The seasonal Chla development is consistent with the current understanding of physical drivers of ice algal biomass, including the seasonal cycle of irradiance and surface temperatures driving landfast sea ice growth and melt. Landfast ice regions with reported platelet ice formation show maximum ice algal biomass. Ice algal communities in the lowermost third of the ice cores dominate integrated Chla concentrations during most of the year, but internal and surface communities are important, particularly in winter. Through comparison of biomass estimates based on different sea ice sampling strategies, that is, analysis of full cores versus bottom‐ice section sampling, we identify biases in common sampling approaches and provide recommendations for future survey programs: for example, the need to sample fast ice over its entire thickness and to measure auxiliary physicochemical parameters.
Rights: Copyright 2018 American Geophysical Union.
Type: article
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野村 大樹

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