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首页> 外文期刊>ICES Journal of Marine Science >Satellite remote sensing of primary productivity in the Bering and Chukchi Seas using an absorption-based approach
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Satellite remote sensing of primary productivity in the Bering and Chukchi Seas using an absorption-based approach

机译：利用基于吸收的方法对白令海和楚科奇海的初级生产力进行卫星遥感

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摘要

Ocean colour remote sensing has been utilized for studying primary productivity in the Arctic Ocean. However, phytoplankton chlorophyll a (Chl a) is not predicted accurately because of the interference of coloured dissolved organic matter (CDOM) and non-algal particles (NAP). To enhance the estimation accuracy, a phytoplankton absorption-based primary productivity model (ABPM) was applied to the Bering and Chukchi Seas. The phytoplankton absorption coefficient was determined correctly from sea surface remote sensing reflectance (R_(rs)) and reduced the effect of CDOM and NAP in primary productivity (PP_(eu)) estimates. PP_(eu) retrieved from in situ R_(rs) using the ABPM satisfied a factor of 2 of measured values. PP_(eu) estimated from the Moderate Resolution Imaging Spectroradiometer R_(rs) data were within the range of historical values. These estimated PP_(eu) values were less than half of those of the model based on Chl a, and the difference between the two models reflected the influence of CDOM and NAP absorptions. Interannual variation in August and September over the period 2002-2010 showed an increase in primary productivity. The increase in 2007 was especially large, by a factor of 1.51 -2.71, compared with 2006. The significant temporal increase in productivity detected here differs from earlier studies that detected little, if any, change in the region.
机译：海洋色彩遥感已被用于研究北冰洋的主要生产力。但是，由于有色溶解性有机物（CDOM）和非藻类颗粒（NAP）的干扰，浮游植物叶绿素a（Chl a）不能准确预测。为了提高估算的准确性，将基于浮游植物吸收的初级生产力模型（ABPM）应用于白令海和楚科奇海。浮游植物的吸收系数是根据海面遥感反射率（R_（rs））正确确定的，并减少了CDOM和NAP在初级生产力（PP_（eu））估计中的影响。使用ABPM从原位R_（rs）检索的PP_（eu）满足测量值的2倍。根据中分辨率成像光谱仪R_（rs）数据估算的PP_（eu）在历史值范围内。这些估计的PP_（eu）值小于基于Chla的模型的一半，并且两个模型之间的差异反映了CDOM和NAP吸收的影响。 2002-2010年期间8月和9月的年际变化表明初级生产力有所提高。与2006年相比，2007年的增幅尤其大，增幅为1.51 -2.71。这里发现的生产力的显着时间增长与早期的研究不同，早期的研究表明该地区几乎没有变化。

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