GSTDTAP  > 气候变化
DOI10.1029/2019GL083319
Ligand Binding Strength Explains the Distribution of Iron in the North Atlantic Ocean
Pham, Anh L. D.; Ito, Takamitsu
2019-07-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
卷号46期号:13页码:7500-7508
文章类型Article
语种英语
国家USA
英文摘要

Observations of dissolved iron (dFe) in the subtropical North Atlantic revealed remarkable features: While the near-surface dFe concentration is low despite receiving high dust deposition, the subsurface dFe concentration is high. We test several hypotheses that might explain this feature in an ocean biogeochemistry model with a refined Fe cycling scheme. These hypotheses invoke a stronger lithogenic scavenging rate, rapid biological uptake, and a weaker binding between Fe and a ubiquitous, refractory ligand. While the standard model overestimates the surface dFe concentration, a 10-time stronger biological uptake run causes a slight reduction in the model surface dFe. A tenfold decrease in the binding strength of the refractory ligand, suggested by recent observations, starts reproducing the observed dFe pattern, with a potential impact for the global nutrient distribution. An extreme value for the lithogenic scavenging rate can also match the model dFe with observations, but this process is still poorly constrained.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000476960100050
WOS关键词DISSOLVED IRON ; ORGANIC COMPLEXATION ; MODEL ; PHYTOPLANKTON ; PACIFIC
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/185069
专题气候变化
作者单位Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
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GB/T 7714
Pham, Anh L. D.,Ito, Takamitsu. Ligand Binding Strength Explains the Distribution of Iron in the North Atlantic Ocean[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7500-7508.
APA Pham, Anh L. D.,&Ito, Takamitsu.(2019).Ligand Binding Strength Explains the Distribution of Iron in the North Atlantic Ocean.GEOPHYSICAL RESEARCH LETTERS,46(13),7500-7508.
MLA Pham, Anh L. D.,et al."Ligand Binding Strength Explains the Distribution of Iron in the North Atlantic Ocean".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7500-7508.
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