气候变化领域集成服务门户(CCPortal): Hierarchy of calibrated global models reveals improved distributions and fluxes of biogeochemical tracers in models with explicit representation of iron

CCPortal

DOI	10.1088/1748-9326/ab4c52
	Hierarchy of calibrated global models reveals improved distributions and fluxes of biogeochemical tracers in models with explicit representation of iron
	Yao W.; Kvale K.F.; Achterberg E.; Koeve W.; Oschlies A.
发表日期	2019
ISSN	17489318
卷号	14 期号:11
英文摘要	Iron is represented in biogeochemical ocean models by a variety of structurally different approaches employing generally poorly constrained empirical parameterizations. Increasing the structural complexity of iron modules also increases computational costs and introduces additional uncertainties, with as yet unclear benefits. In order to demonstrate the benefits of explicitly representing iron, we calibrate a hierarchy of iron modules and evaluate the remaining model-data misfit. The first module includes a complex iron cycle with major processes resolved explicitly, the second module applies iron limitation in primary production using prescribed monthly iron concentration fields, and the third module does not explicitly include iron effects at all. All three modules are embedded into the same circulation model. Models are calibrated against global data sets of NO3, PO4 and O2 applying a state-of-the-art multi-variable constraint parameter optimization. The model with fully resolved iron cycle is marginally (up to 4.8%) better at representing global distributions of NO3, PO4 and O2 compared to models with implicit or absent parameterizations of iron. We also found a slow down of global surface nutrient cycling by about 30% and a shift of productivity from the tropics to temperate regions for the explicit iron module. The explicit iron model also reduces the otherwise overestimated volume of suboxic waters, yielding results closer to observations. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	calibration; iron model; nutrient pathways; scavenging
语种	英语
scopus关键词	Biogeochemistry; Calibration; Nutrients; Scavenging; Biogeochemical tracers; Computational costs; Explicit representation; Global distribution; Iron concentrations; Nutrient pathways; Parameter optimization; Structural complexity; Iron; biogeochemical cycle; calibration; complexity; concentration (composition); data set; hierarchical system; iron; nutrient cycling; optimization; oxygen; primary production
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154733
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, Kiel, D-24105, Germany
推荐引用方式 GB/T 7714	Yao W.,Kvale K.F.,Achterberg E.,et al. Hierarchy of calibrated global models reveals improved distributions and fluxes of biogeochemical tracers in models with explicit representation of iron[J],2019,14(11).
APA	Yao W.,Kvale K.F.,Achterberg E.,Koeve W.,&Oschlies A..(2019).Hierarchy of calibrated global models reveals improved distributions and fluxes of biogeochemical tracers in models with explicit representation of iron.Environmental Research Letters,14(11).
MLA	Yao W.,et al."Hierarchy of calibrated global models reveals improved distributions and fluxes of biogeochemical tracers in models with explicit representation of iron".Environmental Research Letters 14.11(2019).