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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25353

Title: The effect of typhoon on particulate organic carbon flux in the southern East China Sea
Authors: C.-C. Hung;G.-C. Gong;W.-C. Chou;C.-C. Chung;M.-A. Lee;Y. Chang;H.-Y. Chen;S.-J. Huang;Y. Yang;W.-R. Yang;W.-C. Chung;S.-L. Li;E. Laws
Contributors: NTOU:Institute of Marine Environmental Chemistry and Ecology
Keywords: Yyphoon
Date: 2010
Issue Date: 2011-10-20T08:22:22Z
Publisher: Biogeosciences Discuss
Abstract: abstract:Severe tropical storms play an important role in triggering phytoplankton blooms, but the extent to which such storms influence carbon flux from the euphotic zone is unclear. In 2008, typhoon Fengwong provided a unique opportunity to study the in situ biological responses including phytoplankton blooms and particulate organic carbon fluxes associated with a severe storm in the southern East China Sea (SECS). After passage of the typhoon, the sea surface temperature (SST) in the SECS was markedly cooler (~25 to 26 °C) than before typhoon passage (~28 to 29 °C). The POC flux 5 days after passage of the typhoon was 265 ± 14 mg-C m−2 d−1, which was ~1.7-fold that (140–180 mg-C m−2 d−1) recorded during a period (June–August, 2007) when no typhoons occurred. A somewhat smaller but nevertheless significant increase in POC flux (224–265 mg-C m−2 d−1) was detected following typhoon Sinlaku which occurred approximately 1 month after typhoon Fengwong, indicating that typhoon events can increase biogenic carbon flux efficiency in the SECS. Remarkably, phytoplankton uptake accounted for only about 5% of the nitrate injected into the euphotic zone by typhoon Fengwong and it is likely that phytoplankton population growth was presumably constrained by a combination of light limitation and grazing pressure. Modeled estimates of new/export production were remarkably consistent with the average of new and export production following typhoon Fengwong. The same model suggested that during non-typhoon conditions approximately half of the export of organic carbon occurs via convective mixing of dissolved organic carbon, a conclusion consistent with earlier work at comparable latitudes in the open ocean.
Relation: 7, pp.3521-3550
URI: http://ntour.ntou.edu.tw/handle/987654321/25353
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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