School of Environmental Sciences and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea.
Environmental Physics Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland.
Science. 2014 Nov 28;346(6213):1102-6. doi: 10.1126/science.1258396.
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.
近年来，来自东北亚的人为排放的活性氮增加，随后在北太平洋（NPO）的广大地区的沉积增强，导致上层海洋中硝酸盐（N）浓度的可检测增加。发现过量 N 相对于磷酸盐（P）的增长率在亚洲源大陆附近最高（~0.24 微摩尔/千克/年），随着氮的大气沉积的强度和分布，向东穿越 NPO 而降低。这种人为驱动的 NPO 上层 N 含量的增加可能会增强这个 N 限制区域的初级生产力，可能导致 NPO 从 N 限制长期转变为 P 限制。
