Ocean glider observations of iceberg-enhanced biological production in the northwestern Weddell Sea
Ocean glider observations of iceberg-enhanced biological production in the northwestern Weddell Sea
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DOI：
10.1002/2014gl062850
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发表时间：
2015-01-28
影响因子：
5.2
通讯作者：
Jenkins, Adrian
中科院分区：
文献类型：
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作者：
Biddle, Louise C.;Kaiser, Jan;Jenkins, Adrian
冰山影响着南极洲周围当地的生物生产。2012年初，我们利用海洋滑翔机观测了由南极斜坡流沿威德尔海西北部大陆斜坡平流而来的一座大冰山的影响。高分辨率的滑翔机数据揭示了冰山对海洋特性的显著影响，其氧浓度（134）摩尔千克（-1）高于周围水域的水平，这很可能是由于正的净群落产量。这种反应仅限于冰山轨迹直接附近的三个水域，每个水域不超过2公里。我们的研究结果表明，冰山对南极生产的影响可能是通过当地微量营养素的注入，其规模小于南大洋生物生产的典型卫星观测。
Icebergs affect local biological production around Antarctica. We used an ocean glider to observe the effects of a large iceberg that was advected by the Antarctic Slope Current along the continental slope in the northwestern Weddell Sea in early 2012. The high-resolution glider data reveal a pronounced effect of the iceberg on ocean properties, with oxygen concentrations of (134) molkg(-1) higher than levels in surrounding waters, which are most likely due to positive net community production. This response was confined to three areas of water in the direct vicinity of the iceberg track, each no larger than 2 km(2). Our findings suggest that icebergs have an impact on Antarctic production presumably through local micronutrient injections, on a scale smaller than typical satellite observations of biological production in the Southern Ocean.