[OANNES Foro] Increasing anthropogenic nitrogen in the North Pacific Ocean

[Mario Cabrejos]

Science 28 November 2014: 
Vol. 346 no. 6213 pp. 1102-1106 
DOI: 10.1126/science.1258396


 


Increasing anthropogenic nitrogen in the North Pacific Ocean


1.     <http://www.sciencemag.org/search?author1=Il-Nam+Kim&sortspec=date&submit=Submit> Il-Nam Kim <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-1> 1,  <http://www.sciencemag.org/search?author1=Kitack+Lee&sortspec=date&submit=Submit> Kitack Lee <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-1> 1, <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#corresp-1> *,  <http://www.sciencemag.org/search?author1=Nicolas+Gruber&sortspec=date&submit=Submit> Nicolas Gruber <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-2> 2,  <http://www.sciencemag.org/search?author1=David+M.+Karl&sortspec=date&submit=Submit> David M. Karl <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-3> 3,  <http://www.sciencemag.org/search?author1=John+L.+Bullister&sortspec=date&submit=Submit> John L. Bullister <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-4> 4,  <http://www.sciencemag.org/search?author1=Simon+Yang&sortspec=date&submit=Submit> Simon Yang <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-2> 2,  <http://www.sciencemag.org/search?author1=Tae-Wook+Kim&sortspec=date&submit=Submit> Tae-Wook Kim <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#aff-5> 5

1.    1School of Environmental Sciences and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790–784, Republic of Korea.
2.    2Environmental Physics Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland.
3.    3Daniel K. Inouye Center for Microbial Oceanography, University of Hawaii at Manoa, 1950 East West Road, Honolulu, HI 96822, USA.
4.    4Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration (NOAA), Seattle, WA 98115, USA.
1.    5Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology, Ansan, 426–744, Republic of Korea. <http://www.sciencemag.org/content/346/6213/1102.abstract?utm_campaign=email-sci-toc&utm_source=eloqua#xref-corresp-1-1> ↵*Corresponding author. E-mail:  <mailto:ktl en postech.ac.kr> ktl en postech.ac.kr
2.     

·          <http://www.sciencemag.org/content/346/6213/tab-abstract> ABSTRACT

The recent increase in anthropogenic emissions of reactive nitrogen from northeastern Asia and the subsequent enhanced deposition over the extensive regions of the North Pacific Ocean (NPO) have led to a detectable increase in the nitrate (N) concentration of the upper ocean. The rate of increase of excess N relative to phosphate (P) was found to be highest (∼0.24 micromoles per kilogram per year) in the vicinity of the Asian source continent, with rates decreasing eastward across the NPO, consistent with the magnitude and distribution of atmospheric nitrogen deposition. This anthropogenically driven increase in the N content of the upper NPO may enhance primary production in this N-limited region, potentially leading to a long-term change of the NPO from being N-limited to P-limited.

 



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