| GAO Shan,WANG Hui,LIU Guimei,HUANG Liangmin,SONG Xingyu. 2012. Chlorophyll a increase induced by surface winds in the northern South China Sea. Acta Oceanologica Sinica, (4):76－88 |
| Chlorophyll a increase induced by surface winds in the northern South China Sea |
| Chlorophyll a increase induced by surface winds in the northern South China Sea |
| Received:January 25, 2011 Revised:April 29, 2011 |
| DOI：10.1007/s13131-012-0222-z |
| Key words:South China Sea phytoplankton bloom chlorophyll a surface wind vertical mixing and upwelling |
| 中文关键词: South China Sea phytoplankton bloom chlorophyll a surface wind vertical mixing and upwelling |
| 基金项目: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. |
| Author Name | Affiliation | E-mail | | GAO Shan | College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China | gaoshan_shining@163.com | | WANG Hui | National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China | | | LIU Guimei | National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China | | | HUANG Liangmin | State Key Laboratory of Oceanography in the Tropics, Guangzhou 510301, China
Key Laboratory of Marine, Bio-resources Sustainable Utilization, Chinese Academy of Sciences, Guangzhou 510301, China | | | SONG Xingyu | State Key Laboratory of Oceanography in the Tropics, Guangzhou 510301, China
Key Laboratory of Marine, Bio-resources Sustainable Utilization, Chinese Academy of Sciences, Guangzhou 510301, China | |
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| Abstract: |
| 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), SeaWiFSderived 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 (RSderived) 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. |
| 中文摘要: |
| 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), SeaWiFSderived 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 (RSderived) 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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