Publication Date:
2014-11-29
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Il-Nam -- Lee, Kitack -- Gruber, Nicolas -- Karl, David M -- Bullister, John L -- Yang, Simon -- Kim, Tae-Wook -- New York, N.Y. -- Science. 2014 Nov 28;346(6213):1102-6. doi: 10.1126/science.1258396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Environmental Sciences and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea. ; School of Environmental Sciences and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea. ktl@postech.ac.kr. ; Environmental Physics Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland. ; Daniel K. Inouye Center for Microbial Oceanography, University of Hawaii at Manoa, 1950 East West Road, Honolulu, HI 96822, USA. ; Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration (NOAA), Seattle, WA 98115, USA. ; Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology, Ansan, 426-744, Republic of Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25430767" target="_blank"〉PubMed〈/a〉
Keywords:
Asia
;
Humans
;
Nitrates/*analysis
;
Nitrogen/*analysis
;
Pacific Ocean
;
Phosphates/analysis
;
Seawater/*chemistry
;
Water Pollutants, Chemical/*analysis
;
*Water Pollution
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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