Spatiotemporal variations of total suspended matter (TSM) in the Pearl River estuary using MERIS full-resolution (FR) level-2 TSM product
Feng Gao A B , Yunpeng Wang A D , Xinyi Hu A B , Chao Xu A B and Ned Horning C
+ Author Affiliations
- Author Affiliations
A State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, PR China.
B University of Chinese Academy of Sciences, Beijing, 100049, PR China.
C American Museum of Natural History Center for Biodiversity and Conservation, Central Park West at 79th Street, New York, NY 10024, USA.
D Corresponding author. Email: wangyp@gig.ac.cn
Marine and Freshwater Research 70(8) 1065-1077 https://doi.org/10.1071/MF18111
Submitted: 21 March 2018 Accepted: 12 December 2018 Published: 18 February 2019
Abstract
In this study, we first use self-organising map (SOM) and medium-resolution imaging spectrometer (MERIS) full-resolution (FR) level-2 total suspended matter (TSM) product to identify spatial-distribution patterns of TSM concentration in the Pearl River estuary. Second, the spatial and temporal variation of TSM concentration in the Pearl River estuary was investigated using 9-year (2003–2011) MERIS FR level-2 TSM products. The spatial-distribution patterns of TSM concentration identified by SOM in the Pearl River estuary showed that there are high values in west and north and low values in east and south. On the basis of the analysis of the sample points randomly extracted from the Pearl River estuary, the results showed that the spatial variation of TSM in eight gates varied greatly, and the Lingdingyang Bay from Humen to offshore waters (i.e. Xitan, Zhongtan and Dongtan) presents a decreasing trend. Moreover, extreme climate events (e.g. EI Niño and La Niña) may have a great effect on spatial and temporal variation of TSM concentration in the Pearl River estuary. These results could provide a new insight for a better understanding of the dynamics of TSM concentration in the Pearl River estuary and the effect of soil- and water-conservation measures in the upstream of Pearl River.
Additional keywords: EI Niño and La Niña, precipitation, SOM, spatial and temporal variation.
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