Spatial extent and historical context of North Sea oxygen depletion in August 2010.
Spatial extent and historical context of North Sea oxygen depletion in August 2010.
复制标题
2010 年 8 月北海氧气消耗的空间范围和历史背景。
DOI：
10.1007/s10533-012-9729-9
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发表时间：
2013
期刊：
影响因子：
4
通讯作者：
Queste BY
中科院分区：
文献类型：
--
作者：
Queste BY
根据最近对北海两个系泊处季节性低溶解氧的观测，2010年8月的水文调查绘制了夏季氧气消耗的空间范围。北海分层区域的典型近床溶解氧饱和度为75- 80%，而北海南部混合良好的区域达到90%。两个热分层强烈的区域，杜利海流和北海中部海流之间的区域和牡蛎地（Oyster Grounds），氧饱和度分别低至65%和70%（200和180 μmol dm−3）。低溶解氧是明显的，其特征在于低平流，高分层，提高有机物生产从春季水华和深叶绿素最大值的地区。国际海洋勘探理事会海洋学数据库上世纪的历史数据突出表明，过去20年来，季节性氧气消耗增加，气候变暖。2010年的调查结果与历史数据（尽管稀少）中所见的关键地点近期氧气耗尽的信号一致，并加强了这一信号。
Prompted by recent observations of seasonal low dissolved oxygen from two moorings in the North Sea, a hydrographic survey in August 2010 mapped the spatial extent of summer oxygen depletion. Typical near-bed dissolved oxygen saturations in the stratified regions of the North Sea were 75–80 % while the well-mixed regions of the southern North Sea reached 90 %. Two regions of strong thermal stratification, the area between the Dooley and Central North Sea Currents and the area known as the Oyster Grounds, had oxygen saturations as low as 65 and 70 % (200 and 180 μmol dm−3) respectively. Low dissolved oxygen was apparent in regions characterised by low advection, high stratification, elevated organic matter production from the spring bloom and a deep chlorophyll maximum. Historical data over the last century from the International Council for the Exploration of the Sea oceanographic database highlight an increase in seasonal oxygen depletion and a warming over the past 20 years. The 2010 survey is consistent with, and reinforces, the signal of recent depleted oxygen at key locations seen in the (albeit sparse) historical data.