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学科主题: Oceanography
题名: Seasonal variability of light absorption properties and water optical constituents in Hudson Bay, Canada
作者: [Xi, Hongyan ; Larouche, Pierre] Fisheries & Oceans Canada, Maurice Lamontagne Inst, Mont Joli, PQ G5H 3Z4, Canada ; [Tang, Shilin ; Michel, Christine] Fisheries & Oceans Canada, Inst Freshwater, Winnipeg, MB R3T 2N6, Canada ; [Tang, Shilin] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
通讯作者: pierre.larouche@dfo-mpo.gc.ca
关键词: seasonal variability ; absorption properties ; optically significant water constituents ; Hudson Bay
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2013
卷: 118, 期:6, 页:3087-3102
部门归属: LTO
资助者: This work was made possible with the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), the Department of Fisheries and Oceans Canada, and the Canadian Space Agency. We are grateful to the crew of the NGCC Amundsen for their dedication supporting science activities. We thank Remi Coulombe for his help with sample measurement in 2005 and Corrine B. Brunelle, Thomas Jaegler, and Real Gagnon for their help in the absorption measurements. The comments of Emmanuel Boss and Xiang-guang Zhang contributed substantially to this paper. This is a contribution to the Arctic-Net research network.
摘要: Previous studies have shown that the properties of optically significant water constituents (phytoplankton, suspended matter, and colored dissolved organic matter (CDOM)) in Hudson Bay are different from other Arctic regions. A new bio-optical data set collected in summer 2010 shows that this region also presents seasonal variability of the light absorption coefficients by the different constituents, with a higher relative proportion of CDOM absorption in summer than in the fall as a result of decreased phytoplankton absorption in summer. The slope of the exponential function describing nonalgal particles and CDOM spectral absorption shows little variability between fall and summer. Seasonal variability of light absorption coefficients and water optical constituents is more pronounced near the coast, while less variability is observed in the central part of the bay. Very low summertime chlorophyll-specific absorption coefficients by phytoplankton, among the lowest reported in the literature, are attributed to the high proportion of large size phytoplankton (microphytoplankton) and important packaging effect. There is also a smaller contribution of accessory pigments to total pigments in the summer than in the fall, resulting in a lower blue-to-red phytoplankton absorption ratio. These results emphasize that it is necessary to take into account the seasonal variability of light absorption properties in bio-optical models for further remote sensing applications in Hudson Bay.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000324885500023
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10905
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[Xi, Hongyan; Larouche, Pierre] Fisheries & Oceans Canada, Maurice Lamontagne Inst, Mont Joli, PQ G5H 3Z4, Canada; [Tang, Shilin; Michel, Christine] Fisheries & Oceans Canada, Inst Freshwater, Winnipeg, MB R3T 2N6, Canada; [Tang, Shilin] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China.Seasonal variability of light absorption properties and water optical constituents in Hudson Bay, Canada,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(6):3087-3102
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