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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40854

Title: Field observations of changes in SST, chlorophyll, and POC flux in the southern East China Sea before and after the passage of typhoon Jangmi
Authors: Yung-Yen Shih;Jin-Sheng Hsieh;Gwo-Ching Gong;Chin-Chang Hung;Wen-Chen Chou;Ming-An Lee;Kuo-Shu Chen;Meng-Hsien Chen;Chau-Ron Wu
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Keywords: Typhoon;Hurricane;Sea surface temperature;Chlorophyll;East China Sea;POC flux
Date: 2013-10
Issue Date: 2017-02-07T02:51:55Z
Publisher: Terr. Atmos. Ocean Science
Abstract: Abstract:Severe tropical storms play an important role in triggering phytoplankton blooms, yet direct field observation of evidence of the effects of a typhoon is very rare. Sea surface temperature (SST), nitrate concentration, chlorophyll a (chl a) concentration, and particulate organic carbon (POC) flux were measured before and shortly after Typhoon Jangmi which affected the southern East China Sea (SECS) on September 28 ~ 29, 2008. In situ SST (27.5 ~ 28.0°C) on September 19 ~ 21, decreased to ~24.0°C (October 3 ~ 6) in the SECS 4 ~ 7 days after the passage of Typhoon Jangmi. In situ nitrate and chl a concentrations 7-days (on October 6) after the passage of Jangmi were 1.9 μM and 1.61 mg m-3, respectively, much higher than those (nitrate: 0.3 μM and chl a: 0.73 mg m-3) concentrations before the typhoon (September 21). The enhanced chl a concentration is thus caused by a nutrient supply via vertical mixing or upwelling in the euphotic zone. The POC flux 7-days after Jangmi¡¦s passage was 552 ± 28 mg-C m-2 d-1, a ~2.5-fold increases before the typhoon (224 ± 33 mg-C m-2 d-1, on September 21). Our results suggest that typhoons indeed can stimulate efficient POC export out of the euphotic zone, while it is still poorly understood with regard to the total effects of a typhoon on nutrient dynamics and detailed carbon sequestration due to sampling difficulty. Therefore, successional sea-going observations ought to be conducted in the affected area after the passage of typhoons.
Relation: 24(5), pp.899-910
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40854
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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