کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6362162 | 1622762 | 2010 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inherent optical properties and satellite retrieval of chlorophyll concentration in the lagoon and open ocean waters of New Caledonia
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
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چکیده انگلیسی
The retrieval of chlorophyll-a concentration from remote sensing reflectance (Rrs) data was tested with the NASA OC4v4 algorithm on the inner New Caledonian lagoon (Case 2) and adjacent open ocean (Case 1) waters. The input to OC4v4 was Rrs measured in situ or modeled from water's inherent optical properties (2001-2007). At open ocean stations, backscattering and absorption coefficients were correlated with chlorophyll (R2 = 0.31-0.51, respectively), in agreement with models for Case 1 waters. Taking spectrofluorometric measurement as reference, the OC4v4 model leads to an average underestimation of 33% of the chlorophyll concentration. For the lagoon waters, OC4v4 performed inadequately because the backscattering coefficient, highly correlated with turbidity and suspended matter (R2 = 0.98), was poorly correlated to chlorophyll (R2 = 0.42). The OC4v4 performance was better in deep lagoon waters for stations with a TDT index (Tchla Ã depth/turbidity) higher than 19 mg mâ2 NTUâ1 (R2 = 0.974, bias = 10.2%). Global Imager Rrs provided a good estimate of Tchla (R2 = 0.79, N = 28) in the deeper part of the lagoon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 61, Issues 7â12, 2010, Pages 503-518
Journal: Marine Pollution Bulletin - Volume 61, Issues 7â12, 2010, Pages 503-518
نویسندگان
Cécile Dupouy, Jacques Neveux, Sylvain Ouillon, Robert Frouin, Hiroshi Murakami, Sébastien Hochard, Guillaume Dirberg,