期刊
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
卷 52, 期 24-26, 页码 3344-3354出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr2.2005.10.001
关键词
primary productivity; Chukchi Sea; Arctic Ocean
类别
In the spring and summer of 2002 primary production in the Chukchi Sea was measured, using C-14 uptake experiments. Our cruise track encompassed the shelf and continental slope area of the Chukchi and Beaufort Seas progressing into deep water over the Canada Basin. The study area experienced upwards of 90% ice cover during the spring, with ice retreating into the basin during the summer. Production in the spring was light-limited due to ice cover, with average euphotic zone production rates of < 0.3 g C m(-2) d(-1). Values of 8g C m(-2) d-1 were observed in association with surface bloom conditions during the initial ice breakup. Considerable nutrient reduction in the surface waters took place between the spring and summer cruise, and although not observed, this was attributed to a spring bloom. Decreased ice cover and increased clarity of surface waters in the summer allowed greater light penetration. The highest rates of production during the second cruise were found at 25-30 m, coincident with the top of the nutricline. Daily euphotic zone productivity in the summer averaged 0.78 g C m(-2) d(-1) on the shelf and 0.32g C m(-2) d(-1) on the edge of the Canada basin. These data provide an estimated annual production of 90g C m(-2) yr(-1) in the study area. (c) 2005 Elsevier Ltd. All rights reserved.
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