气候变化领域集成服务门户(CCPortal): Does Sea Surface Temperature Affect Solubility of Iron in Mineral Dust? The Gulf of California as a Case Study

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DOI	10.1029/2019JC015999
	Does Sea Surface Temperature Affect Solubility of Iron in Mineral Dust? The Gulf of California as a Case Study
	Félix-Bermúdez A.; Delgadillo-Hinojosa F.; Torres-Delgado E.V.; Muñoz-Barbosa A.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	Eolian transport of mineral dust is one of the main inputs of iron (Fe) to the global ocean; however, the magnitude and biogeochemical impact of this supply depends on the solubility of the deposited dust. In particular, the effect of temperature on Fe-bearing dust solubility has been scarcely investigated even though a seasonal gradient of sea surface temperature (SST) is a common feature in coastal zones adjacent to the major dust source regions of the world. In this work, the effect of temperature on the fractional solubility of Fe (FFeS) was evaluated experimentally using sieved soils (as a dust proxy) from the Baja California Peninsula and surface seawater from the Gulf of California (GC). Two incubations were performed at 17°C (winter) and 29°C (summer) considering the seasonal variability of SST in the GC. Differences in FFeS up to 3 orders of magnitude (0.003–4.49%) were linked to incubation temperature, dust load, and contact time between seawater and dust. After 72 hr of incubation, the effect of temperature was statistically significant (p < 0.05) for all dust treatments, with FFeS higher (4–24 times) at 29°C. High FFeS in warmer waters are a result of increased Fe-bearing dust dissolution and decreased scavenging of Fe by dust particles. Since temperature appears to control the magnitude of FFeS in the GC, we suggest that this factor could have an effect on the atmospheric inputs of soluble Fe in marginal seas with similar seasonal SST contrasts; including the global ocean, where well-defined latitudinal temperature gradients exist. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric input; fractional solubility; Gulf of California; iron; scavenging; sea surface temperature
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/186665
作者单位	Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
推荐引用方式 GB/T 7714	Félix-Bermúdez A.,Delgadillo-Hinojosa F.,Torres-Delgado E.V.,et al. Does Sea Surface Temperature Affect Solubility of Iron in Mineral Dust? The Gulf of California as a Case Study[J],2020,125(9).
APA	Félix-Bermúdez A.,Delgadillo-Hinojosa F.,Torres-Delgado E.V.,&Muñoz-Barbosa A..(2020).Does Sea Surface Temperature Affect Solubility of Iron in Mineral Dust? The Gulf of California as a Case Study.Journal of Geophysical Research: Oceans,125(9).
MLA	Félix-Bermúdez A.,et al."Does Sea Surface Temperature Affect Solubility of Iron in Mineral Dust? The Gulf of California as a Case Study".Journal of Geophysical Research: Oceans 125.9(2020).