Interdecadal variation of the lower trophic ecosystem in the northern Pacific between 1948 and 2002, in a 3-D implementation of the NEMURO model

被引:48
作者
Aita, Maki Noquchi
Yamanaka, Yasuhiro
Kishi, Michio J.
机构
[1] Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Ecosyst Change Res Program, Kanazawa Ku, Kanagawa 2360001, Japan
[2] Hokkaido Univ, Grad Sch Environm Earth Sci, Kita Ku, Sapporo, Hokkaido 0600810, Japan
[3] Hokkaido Univ, Fac Fisheries Sci, Sapporo, Hokkaido 0600813, Japan
关键词
ecosystem model; NEMURO; Northern Pacific; PDO; regime shift;
D O I
10.1016/j.ecolmodel.2006.07.045
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Regime shifts, consisting of decadal-scale oscillations in atmosphere-ocean systems, have recently been the focus of many marine ecosystem studies. These 'regime shifts' effect the sea surface temperature and mixed layer depth (MLD), changing the environment for marine ecosystems. We simulated changes in the marine ecosystem caused by interdecadal climate variability, using data from 1948 to 2002 to drive an ecosystem model, NEMURO, embedded in a global three-dimensional physical-biological coupled model, '3D-NEMURO'. The results were consistent with observations. Comparing before and after the late 1970s regime shift, primary production and biomass of phytoplankton increased in the north central Pacific but decreased in the sub-tropical northwestern and eastern Pacific. This corresponds to the Pacific decadal oscillation (PDO) index that indicates interdecadal climate variability in the sub-tropical and tropical Pacific. In the north central Pacific, biomass correlated positively with PDO while that in the north eastern and western Pacific correlated negatively with PDO. (c) 2006 Elsevier B.V. All rights reserved.
引用
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页码:81 / 94
页数:14
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