Spatial patterns of primary production on the shelf, slope and basin of the Western Arctic in 2002
Spatial patterns of primary production on the shelf, slope and basin of the Western Arctic in 2002
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DOI：
10.1016/j.dsr2.2005.10.001
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发表时间：
2005-01-01
影响因子：
3
通讯作者：
Cota, G
中科院分区：
文献类型：
--
作者：
Hill, V;Cota, G
在2002年春季和夏季的楚科奇海的初级生产力进行了测量，使用C-14吸收实验。我们的巡航轨迹包括楚科奇海和博福特海的大陆架和大陆坡地区，并在加拿大海盆上空延伸到深水。研究区域在春季经历了90%以上的冰盖，夏季冰退缩到盆地中。春季的生产由于冰层覆盖而受到光照限制，透光层的平均生产率< 0.3 g C m（-2）d（-1）。在最初的冰破裂过程中，观察到8 g Cm（-2）d-1的值与表面水华条件有关。春季和夏季巡航之间，表层沃茨的营养物质大量减少，尽管没有观察到，但这是由于春季水华造成的。在夏季，冰盖的减少和表面沃茨透明度的增加使得光线的穿透力更强。在第二次巡航期间，在25-30米处发现了最高的生产率，与营养线的顶部一致。夏季，陆架区真光层的日生产力平均为0.78gCm（-2）d（-1），加拿大海盆边缘区为0.32gCm（-2）d（-1）。这些数据提供了一个估计的年产量为90克C m（-2）年（-1）在研究区。(c)2005爱思唯尔有限公司保留所有权利。
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.