Interpreting the Progressive Eutrophication in the Bohai Sea and the Yellow Sea with Water Quality and Ocean Color Data

Xing, Qianguo and Tosi, Luigi and Braga, Federica and Gao, Xuelu and Gao, Meng (2016) Interpreting the Progressive Eutrophication in the Bohai Sea and the Yellow Sea with Water Quality and Ocean Color Data. In: Proceedings of Dragon 3 Final Results & Dragon 4 Kick-Off Symposium. SP (739). ESA Communications, Netherlands, pp. 1-13. ISBN 978-92-9221-304-6

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Abstract

World-largest macroalgal blooms (MAB) caused by Ulva prolifera outbreak every summer in the Yellow Sea since 2007, which bring potential damage to regional aquatic environment and economic. Evaluation of the evolution of historic eutrophication status is of importance for exploring the reasons of the blooms and further management. In this study, a novel nutrient pollution index weighted by area (AWCPI-NP) and ocean color data were proposed to assess temporal changes in eutrophication status in the in the Yellow Sea basin, and significant shifts were observed from the pre-MAB phase (2001-2006) to MAB phase (2007-2012): the average AWCPI-NP was higher than that in the pre-MAB phase (2001-2006) by about 45%; Chlorophyll a concentration (Chl-a), an indicator of eutrophication, increased by about 15% in the bloom region. Meanwhile, in the Jiangsu Shoal, the origin place of the floating macroaglae, the annual in-situ nutrient concentrations increased rapidly from 2000 to 2011. This new finding of progressive eutrophication behind the MAB implies that the large scale of MAB in the Yellow Sea might be primarily linked to eutrophication. Accordingly, we suggest policymakers include this new knowledge when countermeasures are considered to control this hazard.

Item Type:	Book Section
Additional Information:	Proceedings 4–8 July 2016 Wuhan, PR China; Co-organised by The National Remote Sensing Center of China (NRSCC) European Space Agency (ESA).
Uncontrolled Keywords:	macroalgal blooms, Ulva prolifera, nutrient pollution index weighted by area (AWCPI-NP), MODIS terra/aqua, NDVI, Sea-viewing Wide Field-ofview Sensor (SeaWIFS)
Subjects:	500 Scienze naturali e Matematica > 550 Scienze della Terra 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.4 Geomorfologia e idrosfera 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.4 Geomorfologia e idrosfera > 551.46 Idrosfera, Geologia sottomarina e Oceanografia (Classificare qui le acque marine, l'Idrografia, l'Oceanografia fisica; le opere interdisciplinari sulla Scienza del mare, sugli oceani e i mari) 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.4 Geomorfologia e idrosfera > 551.48 Idrologia (Classificare qui il bilancio idrologico, il ciclo idrologico, la Limnologia) (Classificare le opere d'insieme su Oceanografia e Idrologia in 551.46; classificare le risorse idriche, le opere interdisciplinari sull'acqua in 553.7)
Depositing User:	Dr Luigi Tosi
Date Deposited:	12 Dec 2016 13:33
Last Modified:	12 Dec 2016 13:33
URI:	http://eprints.bice.rm.cnr.it/id/eprint/15480

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