High particle export over the continental shelf of the west Antarctic Peninsula
High particle export over the continental shelf of the west Antarctic Peninsula
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DOI：
10.1029/2010gl045448
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发表时间：
2010-11-24
影响因子：
5.2
通讯作者：
Ducklow, Hugh W.
中科院分区：
文献类型：
--
作者：
Buesseler, Ken O.;McDonnell, Andrew M. P.;Ducklow, Hugh W.
漂流圆柱形陷阱和通量代理 Th-234 表明，2009 年 1 月颗粒碳和 Th-234 的下沉通量比南极半岛西部陆架 (WAP) 常用的时间序列圆锥形陷阱测量的要高出一个数量级以上。本研究中测得的较高流量对于我们了解 WAP 生态系统具有多种意义。较大的沉没通量导致修正后的输出效率至少为 10%（C 通量/净初级产量），并且地表水的再生效率也相应降低。高通量还导致大量下沉有机物质，以支持大陆架上的地下和底栖食物网。这些新发现对颗粒通量的季节性和年际变化幅度提出了质疑，并重申了使用系泊锥形陷阱作为浅水中定量通量收集器的困难。引用：Buesseler, K. O.、A. M. P. McDonnell、O. M. E. Schofield、D. K. Steinberg 和 H. W. Ducklow (2010)，南极半岛西部大陆架的高颗粒输出，地球物理学。资源。 Lett.，37，L22606，doi：10.1029/2010GL045448。
Drifting cylindrical traps and the flux proxy Th-234 indicate more than an order of magnitude higher sinking fluxes of particulate carbon and Th-234 in January 2009 than measured by a time-series conical trap used regularly on the shelf of the west Antarctic Peninsula (WAP). The higher fluxes measured in this study have several implications for our understanding of the WAP ecosystem. Larger sinking fluxes result in a revised export efficiency of at least 10% (C flux/net primary production) and a requisite lower regeneration efficiency in surface waters. High fluxes also result in a large supply of sinking organic matter to support subsurface and benthic food webs on the continental shelf. These new findings call into question the magnitude of seasonal and interannual variability in particle flux and reaffirm the difficulty of using moored conical traps as a quantitative flux collector in shallow waters. Citation: Buesseler, K. O., A. M. P. McDonnell, O. M. E. Schofield, D. K. Steinberg, and H. W. Ducklow (2010), High particle export over the continental shelf of the west Antarctic Peninsula, Geophys. Res. Lett., 37, L22606, doi: 10.1029/2010GL045448.