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Chlorophyll a increase induced by surface winds in the northern South China Sea

ISSN号：0253-505X
期刊名称：Acta Oceanologica Sinica
时间：2012.7.7
页码：76-88
分类：P732.1[天文地球—海洋科学] X832[环境科学与工程—环境工程]
作者机构：[1]College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China, [2]National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081,China, [3]State Key Laboratory of Oceanography in the Tropics, Guangzhou 510301, China, [4]Key Laboratory of Marine, Bio-resources Sustainable Utilization, Chinese Academy of Sciences,Guangzhou 510301, China
相关基金：Foundation item： The National Natural Science Foundation of China under contract Nos 41076011, 40531006, 41130855 and 40906057; the Knowledge Innovation Project of Chinese Academy of Sciences under contract No. KZCX2-YW-Q07. This study is supported by the South China Sea open cruise by R/V Shiyan 3, the South China Sea Institute of Oceanology （SCSIO）, Chinese Academy of Sciences. The dataset of in-situ Chl a concentra- tion was provided by the Research Group of Marine Ecology, the SCSIO.
相关项目：南海海洋生态系统碳循环的数值模拟研究

关键词：叶绿素A浓度, 南海北部, 中国南海, 海面风, SEAWIFS, 遥感数据, 相关系数, AVHRR, South China Sea, phytoplankton bloom, chlorophyll a, surface wind, vertical ,nixingand upwelling

中文摘要：

叶绿素的反应一( Chl 一)弯屈应力的集中在华南海( SCS )被分析，在原处使用 Chl 的数据一个and 遥感数据(QuikScat海表面风( SSW )，AVHRR海表面温度( SST )，通报合并海的水平异例( SLA )，导出SeaWiFS 的 Chl and MODIS 导出地的 Chl 一)在8月/9月/10月 2004 ， 2006 和 2009 。SSW， SST 和 SLA 7 d 在前的可变性在原处 Chl 采样(包括工作天在原处 Chl 采样) 与一样，学习区域的纬度和经度被调查，并且关联系数在这些水道学的因素之间并且在原处是计算的 Chl 集中。结果证明在上面的层的 Chl a-SSW 关联系数(例如 0 m 和 25 m )是比在更深的层的那些更重要的(例如 50 ， 75 和 100 m ) 13 d 在前，它显示有一时间强壮的表面风刺激落后浮游植物花蕾。由在遥感导出的日报( RSderived )之中分析关系， SSW ， SST ， SLA 和 3 d 平均 SeaWiFS/MODIS-derived Chl 在在2004年9月的北 SCS 的集中并且 2009 分别地，它证明表面风的紧张和速度能穿上大影响 Chl 延长增加。如果表面风到达 45 m/s 在上，集中将增加的 Chl 在强壮的表面的过程以后的 13 d 主要在 9 月期间在北 SCS 的公海区域弯屈。

英文摘要：

The response of chlorophyll a （Chl a） concentration to wind stress is analyzed in the South China Sea （SCS）, using in-situ data of Chl a and remote sensing data （QuikScat-sea surface wind （SSW）, AVHRR-sea surface temperature （SST）, AVISO merged-sea level anomalies （SLA）, SeaWiFS- derived Chl a and MODIS Terra-derived Chl a） in August/September/October 2004, 2006 and 2009. The variability of SSW, SST and SLA 7 d before in-situ Chl a sampling （including the work day of in~situ Chl a sampling） with the same latitude and longitude of the study area are investigated, and the correlation coefficients are calculated between these hydrographic factors and in-situ Chl a concentration. The results show that the Chl a-SSW correlation coefficients at upper layers （such as 0 m and 25 m） are more significant than those at deeper layers （such as 50, 75 and 100 m） 1 3 d before, which indicates that there is a time lag of strong surface winds stimulating phytoplankton bloom. By analyzing the relationship among the daily remote sensing derived （RS- derived） SSW, SST, SLA and 3 d averaged SeaWiFS/MODIS-derived Chl a concentration in the northern SCS in September 2004 and 2009 respectively, it shows that the intensity and speed of surface winds could have great influence on extend of Chl a increase. If surface winds reach 4-5 m/s over, Chl a concentration would increase 1-3 d after the process of strong surface winds in open sea area of the northern SCS mainly during September.

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