The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea

MA Aohui; LIU Xiangnan; LI Ting; LIU Meiling

doi:10.3969/j.issn.0253-4193.2013.04.012

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Article Navigation > Haiyang Xuebao > 2013 > 35(4): 98-105

MA Aohui, LIU Xiangnan, LI Ting, LIU Meiling. The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea[J]. Haiyang Xuebao, 2013, 35(4): 98-105. doi: 10.3969/j.issn.0253-4193.2013.04.012

Citation:

MA Aohui, LIU Xiangnan, LI Ting, LIU Meiling. The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea[J]. Haiyang Xuebao, 2013, 35(4): 98-105. doi: 10.3969/j.issn.0253-4193.2013.04.012

Citation:

MA Aohui, LIU Xiangnan, LI Ting, LIU Meiling. The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea[J]. Haiyang Xuebao, 2013, 35(4): 98-105. doi: 10.3969/j.issn.0253-4193.2013.04.012

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The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea

doi: 10.3969/j.issn.0253-4193.2013.04.012

School of Information Engineering, China University of Geoscences, Beijing 100083, China

Received Date: 2012-05-24
Rev Recd Date: 2013-02-02

Abstract

Abstract

The temporal and spatial distribution of a chlorophyll a (Chl-a) concentration in the northern South China Sea (NSCS) and its relationship with marine environmental factors were studied based on the annually and monthly mean images (January 2007 to December 2010) of the Chl-a concentration, which were obtained from the MODIS chlorophyll a concentration Level 2 products, then classified into seven regions based on the isobaths and divided into six grades. The preliminary results showed that during 2007-2010 in the NSCS, the highest value area(>5 mg/m³) of Chl-a concentration was mainly distributed in Guangdong coastal estuaries, and the biggest in summer, followed in spring and autumn, the smallest in winter; The second highest value area(1.0～5.0 mg/m³) of the Chl-a concentration was mainly in the waters between coastline and 50m isobaths. The distribution range of Chl-a concentration in summer and winter was larger, extending to the vicinity the 50 m isobath, smaller in spring and autumn, keeping within 50 m isobath; the mid-value area(0.3～1.0 mg/m³) of the Chl-a concentration mainly distrubuted between 50 and 100 m isobath with complex temporal and spatial variation; the low value area(<0.3 mg/m³) of the Chl-a concentration distributed basically in the waters beyond the 100 m isobath, where the regional average of monthly mean Chl-a concentration was the lowest in summer, followed by spring and autumn, the highest in winter, and where the spatial distributions of the Chl-a concentration were homogeneous in spring, summer and autumn, but due to the monsoon and the intrusion of Kuroshio, became more complex in winter. The temporal and spatial features of the Chl-a concentration in the NSCS were affected by the variations of the marine environmental factors, such as monsoon, coastal rivers, ocean currents, sea surface temperature, etc．
- northern South China Sea,
- MODIS,
- chlorophyll-a concentration,
- temporal and spatial variability

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