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International Journal of OceanographyVolume 2011 2011, Article ID 731828, 6 pages

Research ArticleThe First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received 25 October 2010; Revised 20 January 2011; Accepted 11 March 2011

Academic Editor: Robert Frouin

Copyright © 2011 Baodong Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on historical data, variations in seawater quality and pollutant origins in marginal seas off China in the recent two decades are overviewed. Analysis shows that the total area of nonclean water was increasing continuously in the 1990s, but it has been decreasing since 2000; however, the total polluted area sum of areas of slightly, medium, and heavily polluted waters in China-s standard fluctuated without a clear trend of decline or increase, indicating that although the increasing trend of marine environmental pollution has been kept effectively within certain limits, seawater quality has not been improved essentially in marginal seas off China. Furthermore, the occurrence frequency and affected area of HABs increased rapidly in marginal seas off China in the last 20 years. The amount of industrial and municipal discharges from the mainland China increased from the end of the 1980s to the end of the 1990s but decreased in the 2010s whereas riverine input of nutrients and pollutants from marine sources increased continuously.





Autor: Baodong Wang, Linping Xie, and Xia Sun

Fuente: https://www.hindawi.com/



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