Ocean processes at the Antarctic continental slope.
Ocean processes at the Antarctic continental slope.
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DOI：
10.1098/rsta.2013.0047
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发表时间：
2014-07-13
期刊：
影响因子：
--
通讯作者：
Smith W
中科院分区：
文献类型：
--
作者：
Heywood KJ;Schmidtko S;Heuzé C;Kaiser J;Jickells TD;Queste BY;Stevens DP;Wadley M;Thompson AF;Fielding S;Guihen D;Creed E;Ridley JK;Smith W
南极大陆架和斜坡面积相对较小，但对全球气候、地球化学循环和生态系统的运作都很重要。通过海冰形成/融化和海洋-大气相互作用的水团转化过程是形成深层和底层沃茨以及确定冰架下热通量的关键。然而，气候模型很难捕捉这些物理过程，无法再现该地区的水团特性。大陆坡的动态是正确模拟气候的关键，但其空间尺度小，对海洋建模和观测研究都构成挑战。跨陆坡交换过程对于铁等营养物质从大陆架流入南大洋混合层也至关重要。一个铁循环模型嵌入在一个涡流允许的海洋模型揭示了沉积铁在南大洋的重要性。海洋滑翔机在提高我们观察和理解大陆架断裂处这些小规模过程的能力方面发挥着关键作用。滑翔机：2012年初，“观测海洋的优秀新工具”项目部署了三架海洋滑翔机，为期两个月，以前所未有的时间和空间细节对南极半岛以东的海水进行采样。滑翔机的数据解决了小规模的交换过程，在货架断裂前（南极斜坡锋）和前线的地球化学特征。GENTOO展示了海洋滑翔机在未来多学科南大洋观测系统中发挥关键作用的能力。
The Antarctic continental shelves and slopes occupy relatively small areas, but, nevertheless, are important for global climate, biogeochemical cycling and ecosystem functioning. Processes of water mass transformation through sea ice formation/melting and ocean–atmosphere interaction are key to the formation of deep and bottom waters as well as determining the heat flux beneath ice shelves. Climate models, however, struggle to capture these physical processes and are unable to reproduce water mass properties of the region. Dynamics at the continental slope are key for correctly modelling climate, yet their small spatial scale presents challenges both for ocean modelling and for observational studies. Cross-slope exchange processes are also vital for the flux of nutrients such as iron from the continental shelf into the mixed layer of the Southern Ocean. An iron-cycling model embedded in an eddy-permitting ocean model reveals the importance of sedimentary iron in fertilizing parts of the Southern Ocean. Ocean gliders play a key role in improving our ability to observe and understand these small-scale processes at the continental shelf break. The Gliders: Excellent New Tools for Observing the Ocean (GENTOO) project deployed three Seagliders for up to two months in early 2012 to sample the water to the east of the Antarctic Peninsula in unprecedented temporal and spatial detail. The glider data resolve small-scale exchange processes across the shelf-break front (the Antarctic Slope Front) and the front's biogeochemical signature. GENTOO demonstrated the capability of ocean gliders to play a key role in a future multi-disciplinary Southern Ocean observing system.
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DOI：
10.1016/j.dsr2.2010.11.013
发表时间：
2011-07-01
影响因子：
3
作者：
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影响因子：
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