Chlorophyll a reconstruction from in situ measurements: 1. Method description
Chlorophyll a reconstruction from in situ measurements: 1. Method description
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DOI：
10.1002/2014jg002691
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
B. Fründt;J. Dippner;J. Waniek
中科院分区：
文献类型：
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作者：
B. Fründt;J. Dippner;J. Waniek
了解初级生产的发展情况对于在气候变化背景下预测全球碳循环至关重要。通过对硝酸盐、叶绿素a和温度的原位测量，获得了作为主要生产指标的叶绿素a后继预测。所得到的拟合函数适用于模拟的温度场。将该方法应用于对北大西洋亚热带环流东北部的马德拉盆地的观测，从1989年至2008年获得了一个叶绿素a场，其月分辨率与SeaWiFS遥感测量的地表叶绿素a数据进行了验证。用我们的方法测定的叶绿素a后投值解决了真光层浮游植物生物量的季节和年际变化以及深部叶绿素的最大值。此外，它还可以估计长期尺度上的碳吸收。
Understanding the development of primary production is essential for projections of the global carbon cycle in the context of climate change. A chlorophyll a hindcast that serves as a primary production indicator was obtained by fitting in situ measurements of nitrate, chlorophyll a, and temperature. The resulting fitting functions were adapted to a modeled temperature field. The method was applied to observations from the Madeira Basin, in the northeastern part of the oligotrophic North Atlantic Subtropical Gyre and yielded a chlorophyll a field from 1989 to 2008 with a monthly resolution validated with remotely measured surface chlorophyll a data by SeaWiFS. The chlorophyll a hindcast determined with our method resolved the seasonal and interannual variability in the phytoplankton biomass of the euphotic zone as well as the deep chlorophyll maximum. Moreover, it will allow estimation of carbon uptake over long time scales.