Change conalysis of chlorophyll concentration in the East China Sea and its response to seawater temperature

doi:10.13474/j.cnki.11-2246.2020.0177

Abstract

Abstract: The analysis of temporal and spatial pattern of ocean chlorophyll concentration and its response to sea water temperature are of great significance for the development and protection of ocean resources and the prevention of red tide. Based on the data of chlorophyll concentration and sea water temperature in the East China Sea from 2004 to 2018, the paper uses the trend analysis and ArcGIS10.2 software, does the space-time analysis of Chlorophyll concentration in the East China Sea, and combines with the water temperature carried on the regression analysis to explore the Chlorophyll of the response mechanism of the water temperature changes. The results show that: ①Chlorophyll concentration in the East China Sea shows no significant interannual variation between 2004 and 2018.Chlorophyll concentration in the East China Sea fluctuates up and down during the year, with peaks in winter and troughs in summer. The closer to the coastal zone, the higher the chlorophyll concentration.②The sea water temperature in the East China Sea area fluctuates on an interannual scale, with a higher temperature in summer and autumn on a seasonal scale, followed by spring and the lowest in winter. Sea surface temperature rises gradually from the coast to the open sea. ③In terms of spatial correlation, chlorophyll concentration in the East China Sea is negatively correlated with seawater temperature as a whole, and the degree of correlation is different in different sea areas. There is a strong correlation between chlorophyll concentration and seawater temperature in the Yangtze River Delta and offshore area. In coastal areas, due to the influence of urban environment, economic development and human production and life, the correlation between seawater temperature and chlorophyll concentration is not obvious.

Key words: chlorophyll concentration, seawater temperature, spatial temporal variability, remote sensing monitoring, East China Sea

CLC Number:

P237

JIANG Shan, WANG Yicheng, MA Renfeng. Change conalysis of chlorophyll concentration in the East China Sea and its response to seawater temperature[J]. Bulletin of Surveying and Mapping, 2020, 0(6): 39-44.

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