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Indexed by:期刊论文

Date of Publication:2010-05-01

Journal:ACTA OCEANOLOGICA SINICA

Included Journals:SCIE、CSCD、Scopus

Volume:29

Issue:3

Page Number:97-105

ISSN No.:0253-505X

Key Words:physical structure; chlorophyll a; Antarctica; winter sea-ice

Abstract:The investigation on sea-ice biology in combination with physics, chemistry and ecology was carried out in the northwestern Weddell Sea, Antarctica, during the cruise ANT/XX III-7 on board POLARSTERN in the austral winter (August-October) in 2006. The distribution of chlorophyll a was measured and related to sea ice texture. The mean concentrations of chlorophyll a in the sea ice varied considerably with ice texture. The concentration of chlorophyll a per core ranged from 2.10-84.40 mu g/dm(3) with a mean of 16.56 mu g/dm(3). And the value of R (chlorophyll a / gross chlorophyll) ranged from 0.79-0.83. These high winter chlorophyll values indicate that primary production is considerable and confirms that there is significant primary production in Antarctic sea ice during winter. Thus this constitutes a major proportion of southern ocean primary production and carbon flux before the sea ice retreats.