摘要
以南海海域1997年10月至2002年9月SeaWiFS卫星遥感叶绿素浓度的资料为基础,分析了多年平均的南海叶绿素浓度的时空分布,初步分析结果表明,冬季南海大部分海域叶绿素浓度普遍较高,春季大部分海域较低;南海各个海区的叶绿素月平均最低浓度基本出现在春季的4月或5月,而最高浓度出现的月份却有不同的特征,在中央海盆区出现在12月,在广东沿岸海区出现在7月,在越南东南部近岸海域在8月和12月有两个最高值;在吕宋海峡的西部区域,尽管叶绿素浓度的最高值也出现在12月,但是叶绿素浓度的最低值却出现在夏季的7月.在空间上近岸区域的叶绿素浓度明显高于中央海盆区,西部海域普遍高于东部海域.南海叶绿素浓度的这一时空分布特征与流场(如上升流等)、海面温度场和风场等的变化有关,也与陆源物质的输入等关系密切.
On the basis of the chlorophyll-a data remote sensed by SeaWiFS from October 1997 to September 2002, the spatial and temporal distributions of the monthly mean chlorophyll-a concentration in the South China Sea (SCS) are presented, and their results show that the chlorophyll-a concentrations are usually high in winter and low in spring in the most areas of the SCS; the minimum monthly mean of chlorophyll-a concentration in the SCS generally appears in April or May, but their maximums in different areas appear in different months, that is, the maximum appears in December in the center of the sea basin, and in July along the coast area of Guangdong Province, and there are two peaks in August and December respectively in the southeast inshore area of Vietnam; it is special in the western area of the Luzon Strait that the maximum appears in December and the minimum in July. Spatially, the chlorophyll-a concentrations in inshore areas are higher than those in the central sea basin obviously, and higher in the western areas of the SCS than those in the eastern areas generally. The spatial and temporal features of the chlorophyll-a concentration in the SCS can be affected by the variations of the circulation (such as upwelling), sea surface temperature and wind field, and related to the nutrient transport from land.
出处
《海洋学报》
CAS
CSCD
北大核心
2005年第4期45-52,共8页
基金
中国科学院知识创新工程资助项目(KZCX3SW227)
国家自然科学基金资助项目(40376004)
国家"863"计划资助项目(2002AA639250).
关键词
南海
叶绿素浓度
SEAWIFS
上升流
South China Sea
chlorophyll-a concentration
SeaWiFS
upwelling
