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南海北部基础生物生产过程及其对碳循环的调控研究-深化与集成

项目名称: 南海北部基础生物生产过程及其对碳循环的调控研究-深化与集成
项目类型: 国家自然科学基金(重大研究计划)
项目负责人: 蔡昱明
项目成员: 孙军; 张武昌; 刘诚刚; 郝锵; 许建平; 柴扉; 薛惠洁; 史君贤
项目编号: 90711006
父项目编号:
规划期:
立项时间: 2008-01-01
预期结束: 2011-12-01
实际结束:
金额(万元): 190
目录

详细描述

中文摘要

通过国内外南海海洋学历史资料和已结题重点基金项目数据资料的系统分析和集成、海上补充调查和实验、多品种遥感资料的利用与分析、碳循环的物理-生态系统模型的修正等方法,以"季风-环流-营养盐-基础生物生产-生物泵"之间的驱动和响应关系为研究主线,系统阐明南海北部基础生物生产与代谢的关键物理-生物海洋学耦合调控过程;揭示南海北部环境的长时间序列变化和生态系统与生物资源的响应;阐明基础生物生产与代谢对碳循环、生物泵效率和水层碳通量的调控过程与机制;揭示南海北部中尺度冷涡和暖池的生态学效应,冷涡呈现低海面高度、低温、高盐、低DO、高营养、高Chl a和高初级生产力的特征,暖池则相反;通过ROMS-CoSINE模型的系统集成,深入研究南海物理变化、生态系统响应和碳循环的生物地球化学调控,揭示南海CO2的源汇格局,即夏季是CO2的源,冬季是汇,18 N以南是源、以北是汇,整个南海的年平均为弱源,净通量为1258万t C y-1。

中文主题词

基础生物生产过程;碳的源汇格局;调控机制;深化与集成;南海

英文摘要

Through systematically analysis and integration of the last NSFC key project results and relevant oceanographic historical observation data in the nSCS, combining, as well as new supplementary observation and experiment results, multi-species satellite remote sensing data and 3D-physical-ecosystem model, focusing on the driving and responsing relationship of "monsoon - circulation - nutrients - planktonic productivity - biological bump" coupling systems in the nSCS, key physical-biological coupling controlling processes of planktonic productivity and metabolism were systematically eclucidated. Furthermore, through a long time series multidisciplinary observation (1976-2004), the environmental changes and the responses of the ecosystems and living resources in the northern SCS were revealed. Controlling processes and mechanism of planktonic productivity and metabolism to carbon cycle, biological bump efficiency and carbon flux were eclucidated. Ecological effects of mesoscale cyclonic cold eddies and anticyclontic warm pools in the nSCS were realized, the features with low sea level, low temperature, high salinity, low DO, high nutrient concentration, high chlorophyll and high primary production were exhibited in the cold eddies, and the opposite features in the warm pools. System integration of ROMS-CoSINE Model were applied to lucubrate the variation of physical features, the responses of the ecosystems of the SCS, the biogeochemical controls in carbon cycle, and the spatial and temporal patterns of CO2 source and sink. It was found that SCS was CO2 sink during winter, and source during summer; source in the south of 18 N, sink in the north of it. On the annual mean for the whole SCS, it was a week source with annually net flux of 1258 ten thousands t C a-1 to atmosphere.

英文主题词

Planktonic productivity;Source/sink patterns of CO2 flux;Governing mechanisms;Integration and deepening;The northern South China


结题摘要

通过国内外南海海洋学历史资料和已结题重点基金项目数据资料的系统分析和集成、海上补充调查和实验、多品种遥感资料的利用与分析、碳循环的物理-生态系统模型的修正等方法,以"季风-环流-营养盐-基础生物生产-生物泵"之间的驱动和响应关系为研究主线,系统阐明南海北部基础生物生产与代谢的关键物理-生物海洋学耦合调控过程;揭示南海北部环境的长时间序列变化和生态系统与生物资源的响应;阐明基础生物生产与代谢对碳循环、生物泵效率和水层碳通量的调控过程与机制;揭示南海北部中尺度冷涡和暖池的生态学效应,冷涡呈现低海面高度、低温、高盐、低DO、高营养、高Chl a和高初级生产力的特征,暖池则相反;通过ROMS-CoSINE模型的系统集成,深入研究南海物理变化、生态系统响应和碳循环的生物地球化学调控,揭示南海CO2的源汇格局,即夏季是CO2的源,冬季是汇,18 N以南是源、以北是汇,整个南海的年平均为弱源,净通量为1258万t C y-1。