气候变化领域集成服务门户(CCPortal): Improved Representation of Underwater Light Field and Its Impact on Ecosystem Dynamics: A Study in the North Sea

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DOI	10.1029/2020JC016122
	Improved Representation of Underwater Light Field and Its Impact on Ecosystem Dynamics: A Study in the North Sea
	Skákala J.; Bruggeman J.; Brewin R.J.W.; Ford D.A.; Ciavatta S.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	Understanding ecosystem state on the North-West European (NWE) Shelf is of major importance for both economy and climate research. The purpose of this work is to advance our modeling of in-water optics on the NWE Shelf, with important implications for how we model primary productivity, as well as for assimilation of water-leaving radiances. We implement a stand-alone bio-optical module into the existing coupled physical-biogeochemical model configuration. The advantage of the bio-optical module, when compared to the preexisting light scheme is that it resolves the underwater light spectrally and distinguishes between direct and diffuse downwelling streams. The changed underwater light compares better with both satellite and in situ observations. The module lowered the underwater photosynthetically active radiation, decreasing the simulated primary productivity, but overall, the improved underwater light had relatively limited impact on the phytoplankton seasonal dynamics. We showed that the model skill in representing phytoplankton seasonal cycle (e.g., phytoplankton bloom) can be substantially improved either by assimilation of satellite phytoplankton functional type (PFT) chlorophyll, or by assimilating a novel PFT absorption product. Assimilation of the two PFT products yields similar results, with an important difference in the PFT community structure. Both assimilative runs lead to lower plankton biomass and increase the nutrient concentrations. We discuss some future directions on how to improve our model skill in biogeochemistry without using assimilation, for example, by improving nutrient forcing, retuning the model parameters, and using the bio-optical module to provide a two-way physical-biogeochemical coupling, improving the consistency between model physical and biogeochemical components. © 2020. Crown copyright. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland.
英文关键词	assimilation of radiances; bio-optical module; ecosystem dynamics; North-West European Shelf biogeochemistry
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186788
作者单位	Plymouth Marine Laboratory, The Hoe, Plymouth, United Kingdom; National Centre for Earth Observation, Plymouth, United Kingdom; College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Cornwall, United Kingdom; Met Office, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Skákala J.,Bruggeman J.,Brewin R.J.W.,et al. Improved Representation of Underwater Light Field and Its Impact on Ecosystem Dynamics: A Study in the North Sea[J],2020,125(7).
APA	Skákala J.,Bruggeman J.,Brewin R.J.W.,Ford D.A.,&Ciavatta S..(2020).Improved Representation of Underwater Light Field and Its Impact on Ecosystem Dynamics: A Study in the North Sea.Journal of Geophysical Research: Oceans,125(7).
MLA	Skákala J.,et al."Improved Representation of Underwater Light Field and Its Impact on Ecosystem Dynamics: A Study in the North Sea".Journal of Geophysical Research: Oceans 125.7(2020).