Biogeochemical controls of surface ocean phosphate

Type Article
Date 2019-08
Language English
Author(s) Martiny Adam C.1, 2, Lomas Michael W.3, Fu Weiwei1, Boyd Philip W.4, Chen Yuh-Ling L.5, Cutter Gregory A.6, Ellwood Michael J.7, Furuya Ken8, Hashihama Fuminori9, Kanda Jota9, Karl David M.10, Kodama Taketoshi11, Li Qian P.12, Ma Jian13, Moutin Thierry14, Woodward E. Malcolm S.15, Moore J. Keith1
Affiliation(s) 1 : Department of Earth System Science, University of California, Irvine, Irvine, CA 92697, USA
2 : Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA 92697, USA.
3 : Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, USA.
4 : Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia.
5 : Department of Oceanography, National Sun Yat-sen University, Kaohsiung, Taiwan.
6 : Department of Ocean, Earth, and Atmospheric Sciences, Old Dominion University, Norfolk, VA 23529, USA.
7 : Research School of Earth Sciences, Australian National University, Canberra, ACT 2601, Australia.
8 : Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
9 : Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan.
10 : Daniel K. Inouye Center for Microbial Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822, USA.
11 : Japan Sea National Fisheries Research Institute, Japan Fisheries Research and Education Agency, 1-5939-22, Suido-cho, Chuo, Niigata, Japan.
12 : South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, People’s Republic of China.
13 : State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, People’s Republic of China.
14 : Aix Marseille Université, CNRS, Université de Toulon, IRD, OSU Pythéas, Mediterranean Institute of Oceanography (MIO), UM 110, 13288 Marseille, France.
15 : Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, UK.
Source Science Advances (2375-2548) (American Association for the Advancement of Science (AAAS)), 2019-08 , Vol. 5 , N. 8 , P. eaax0341 (10p.)
DOI 10.1126/sciadv.aax0341
WOS© Times Cited 42
Abstract

Surface ocean phosphate is commonly below the standard analytical detection limits, leading to an incomplete picture of the global variation and biogeochemical role of phosphate. A global compilation of phosphate measured using high-sensitivity methods revealed several previously unrecognized low-phosphate areas and clear regional differences. Both observational climatologies and Earth system models (ESMs) systematically overestimated surface phosphate. Furthermore, ESMs misrepresented the relationships between phosphate, phytoplankton biomass, and primary productivity. Atmospheric iron input and nitrogen fixation are known important controls on surface phosphate, but model simulations showed that differences in the iron-to-macronutrient ratio in the vertical nutrient supply and surface lateral transport are additional drivers of phosphate concentrations. Our study demonstrates the importance of accurately quantifying nutrients for understanding the regulation of ocean ecosystems and biogeochemistry now and under future climate conditions.

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Supplementary Materials 8 2 MB Open access
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Martiny Adam C., Lomas Michael W., Fu Weiwei, Boyd Philip W., Chen Yuh-Ling L., Cutter Gregory A., Ellwood Michael J., Furuya Ken, Hashihama Fuminori, Kanda Jota, Karl David M., Kodama Taketoshi, Li Qian P., Ma Jian, Moutin Thierry, Woodward E. Malcolm S., Moore J. Keith (2019). Biogeochemical controls of surface ocean phosphate. Science Advances, 5(8), eaax0341 (10p.). Publisher's official version : https://doi.org/10.1126/sciadv.aax0341 , Open Access version : https://archimer.ifremer.fr/doc/00511/62308/