Open ocean gas transfer velocity derived from long‐term direct measurements of the CO2 flux
Open ocean gas transfer velocity derived from long‐term direct measurements of the CO2 flux
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DOI：
10.1029/2010gl045597
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发表时间：
2010-12
影响因子：
5.2
通讯作者：
J. Prytherch;M. Yelland;R. Pascal;B. Moat;I. Skjelvan;M. Srokosz
中科院分区：
文献类型：
--
作者：
J. Prytherch;M. Yelland;R. Pascal;B. Moat;I. Skjelvan;M. Srokosz
2006年9月至2009年12月期间，在北大西洋的气象船Polarfront上使用涡流协方差（EC）技术进行了海气开放海洋CO2通量测量。使用自主系统“AutoFlux”进行通量测量。用开路红外气体分析仪测量CO2质量密度。根据质量控制程序，在平均风速高达19.6 m/s的情况下进行了3938次20分钟通量测量，风速明显高于先前公布的结果。在确定气体传输速度的不确定性是大的，但平均风速的关系允许一个新的参数化的气体传输速度被确定。发现气体传输对风速的立方依赖性，这表明气泡介导的交换对气体传输有显著影响。
Air‐sea open ocean CO2 flux measurements have been made using the Eddy Covariance (EC) technique onboard the weathership Polarfront in the North Atlantic between September 2006 and December 2009. Flux measurements were made using an autonomous system ‘AutoFlux’. CO2 mass density was measured with an open‐path infrared gas analyzer. Following quality control procedures, 3938 20‐minute flux measurements were made at mean wind speeds up to 19.6 m/s, significantly higher wind speeds than previously published results. The uncertainty in the determination of gas transfer velocities is large, but the mean relationship to wind speed allows a new parameterisation of the gas transfer velocity to be determined. A cubic dependence of gas transfer on wind speed is found, suggesting a significant influence of bubble‐mediated exchange on gas transfer.