Modeling the impact of reduced sea ice cover in future climate on the Baltic Sea biogeochemistry
Modeling the impact of reduced sea ice cover in future climate on the Baltic Sea biogeochemistry
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DOI：
10.1029/2012gl054375
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发表时间：
2013-01-16
影响因子：
5.2
通讯作者：
Meier, H. E. M.
中科院分区：
文献类型：
--
作者：
Eilola, K.;Martensson, S.;Meier, H. E. M.
在未来气候变暖的情况下，海冰覆盖面积预计将减少，很可能对海洋生态系统产生重大影响。我们研究了未来海冰退缩对波罗的海海洋地球化学的影响，在世纪末，使用区域化的全球气候模拟的合奏。我们发现，春季水华将提前一个月开始，风和波浪引起的再悬浮将增加，导致营养物质从沿海生产区向更深区域的运输增加。内部营养盐通量不一定增加，因为它们还取决于底层水的氧气和温度条件。冬季混合增加的地区有减少冰盖和地区有减少分层由于淡水供应增加。因此，海冰覆盖的减少部分抵消了富营养化，因为垂直混合的增加改善了低层的氧气条件。引文：Eilola，K.，S. Martensson和H. E. M. Meier（2013），模拟未来气候中海冰覆盖减少对波罗的海海洋地球化学的影响，Geophys。保留信函：40，149-154，doi：10.1029/2012GL054375。
In a warming future climate, the sea ice cover is expected to decrease, with very likely large consequences for the marine ecosystem. We investigated the impact of future sea ice retreat on the Baltic Sea biogeochemistry at the end of the century, using an ensemble of regionalized global climate simulations. We found that the spring bloom will start by up to one month earlier and winds and wave-induced resuspension will increase, causing an increased transport of nutrients from the productive coastal zone into the deeper areas. The internal nutrient fluxes do not necessarily increase because they also depend on oxygen and temperature conditions of the bottom water. Winter mixing increases in areas having reduced ice cover and in areas having reduced stratification due to increased freshwater supply. The reduced sea ice cover therefore partly counteracts eutrophication because increased vertical mixing improves oxygen conditions in lower layers. Citation: Eilola, K., S. Martensson, and H. E. M. Meier (2013), Modeling the impact of reduced sea ice cover in future climate on the Baltic Sea biogeochemistry, Geophys. Res. Lett., 40, 149-154, doi:10.1029/2012GL054375.