Arid
DOI10.1016/j.dsr.2017.10.008
Atmospheric iron fluxes in the northern region of the Gulf of California: Implications for primary production and potential Fe limitation
Munoz-Barbosa, Albino1,2; Segovia-Zavala, Jose A.3; Angel Huerta-Diaz, Miguel2; Delgadillo-Hinojosa, Francisco2; Torres-Delgado, Eunice V.2; Lares, Maria L.3; Marinone, Silvio G.3; Gutierrez-Galindo, Efrain A.4
通讯作者Angel Huerta-Diaz, Miguel
来源期刊DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN0967-0637
EISSN1879-0119
出版年2017
卷号129页码:69-79
英文摘要

To study the temporal variability of atmospheric mineral dust and Fe fluxes to the northern region of the Gulf of California, dust samples were collected at San Felipe, Baja California (Site 1) and Puerto Penasco, Sonora (Site 2), from May 2010 to December 2011. Dust fluxes were partially associated with monsoon circulation, with highest (38 +/- 20 mg m(-2) d(-1)) and lowest (8.8 +/- 4.9 mg m(-2) d(-1)) fluxes linked to southwesterly winds (monsoon season) and north-northwesterly winds (non-monsoon season), respectively. Our analysis suggests that the surrounding deserts are the most probable source of dust arriving into the Gulf of California. However, analyses of Al and Fe concentrations in dusts showed no trends that could identify specific particulate Fe provenance. Average particulate Fe atmospheric fluxes Fe-Atm) showed no clear temporal trends and their magnitudes (3.2 +/- 3.4 and 6 +/- 10 mu mol m(-2) d(-1) for sites 1 and 2, respectively) could be considered medium-to-low in magnitude within a global context. An Fe limitation index (FeLI), calculated as the ratio of phytoplankton Fe requirements to atmospheric and upwelling Fe fluxes, is proposed to estimate the impact of atmospheric mineral dust on phytoplankton primary production in surface waters of the Gulf of California. On a seasonal time scale, FeLI results suggest that under winter conditions, there is no evidence of Fe limitation because upwelling Fe contribution (Fe-Up) is high enough to support primary production. In contrast, during summer conditions, when Fe-Up is very low or negligible, high Fe-Atm combined with, high particulate Fe dissolution factors could prevent the northern Gulf of California from becoming Fe-limited. Finally, we postulate that at an interannual scale, conditions prevailing during ENSO events could increase atmospheric Fe fluxes to the Gulf of California, further contributing to prevent Fe limitation in this marginal sea.


英文关键词Iron limitation Index Dust fluxes Monsoonal circulation Gulf of California
类型Article
语种英语
国家Mexico
收录类别SCI-E
WOS记录号WOS:000416191600007
WOS关键词ATLANTIC OCEAN ; DUST TRANSPORT ; PACIFIC-OCEAN ; SAHARAN DUST ; TRACE-METALS ; SEA-SURFACE ; DEPOSITION ; VARIABILITY ; AEROSOL ; TRAJECTORIES
WOS类目Oceanography
WOS研究方向Oceanography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198270
作者单位1.Inst Invest Oceanol, Fac Ciencias Marinas, Posgrad Oceanog Costera, Ensenada, Baja California, Mexico;
2.Univ Autonoma Baja Calif, Inst Invest Oceanol, Carretera Ensenada Tijuana 3917, Ensenada 22860, Baja California, Mexico;
3.Ctr Invest Cient & Educ Super Ensenada, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico;
4.Ctr Estudios Tecnol Mar 11, Direcc Gen Ciencia & Tecnol Mar SEP, Carretera Ensenada Tijuana Apartado Postal 1788, Ensenada 22800, Baja California, Mexico
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Munoz-Barbosa, Albino,Segovia-Zavala, Jose A.,Angel Huerta-Diaz, Miguel,et al. Atmospheric iron fluxes in the northern region of the Gulf of California: Implications for primary production and potential Fe limitation[J],2017,129:69-79.
APA Munoz-Barbosa, Albino.,Segovia-Zavala, Jose A..,Angel Huerta-Diaz, Miguel.,Delgadillo-Hinojosa, Francisco.,Torres-Delgado, Eunice V..,...&Gutierrez-Galindo, Efrain A..(2017).Atmospheric iron fluxes in the northern region of the Gulf of California: Implications for primary production and potential Fe limitation.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,129,69-79.
MLA Munoz-Barbosa, Albino,et al."Atmospheric iron fluxes in the northern region of the Gulf of California: Implications for primary production and potential Fe limitation".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 129(2017):69-79.
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