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福建省海洋学会2014年学术年会暨福建省科协第十四届学...

作者： Suqing Xu Liqi Chen Haiying Chen Jonathan Li Key Laboratory of Global Change and Marine-Atmospheric Chemistry Third Institute of OceanographyState Oceanic Administration Laboratory of Marine Acoustics and Remote Sensing Technology Third Institute of OceanographyState Oceanic Administration University of Waterloo

The Southern Ocean is an important sink of atmospheric CO2 and the magnitude of the CO2 sink is uncertain because its ability to absorb CO2 changes significantly in the decades. An empirical relationship was deduced based on the in-situ p CO2 in the surface seawater and its main controls including Chl-a and SST obtained during the 26 th CHINARE cruise. An extrapolation model was set up combining the empirical relationship with remote sensing data to compute the air-sea carbon fluxes and carbon uptake in the Southern Ocean(south of 50°S). Results of the extrapolation model show that it was a weak source of atmospheric CO2 in the area from 90°E to 90°W(clockwise) and 50°S to 75°S in November 2009. In December 2009, the study area was a weak sink. When the empirical relationship was extended spatially to the whole area from 50°S to 75°S, the results show that in November 2009 the Southern Ocean was a source of 2.8 TgC and in December 2009 it was a sink of-3.5 TgC. The peak flux estimation in 2009 from our results shows that the ability of carbon uptake in the Southern Ocean decreased by 47% compared to the climatological year 2000 of Takahashi et al.(2009). We also estimated the carbon absorption in three ocean sectors namely the south Pacific ocean, the south Indian ocean and the south Atlantic ocean. For the austral summer, the south Atlantic ocean remained a strong carbon sink while the south Indian ocean declined by 40% between 1999 and 2009.

关键词： CHINARE the Southern Ocean extrapolation model remote sensing carbon flux

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Developments of Arctic carbon sink from 1999 to 2008

Developments of Arctic carbon sink from 1999 to 2008

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第28届中国气象学会年会

作者： Zhongyong Gao1,2,Liqi Chen1,2,3,Heng Sun1,2,Wei-jun Cai4,Baoshan Chen4 1 Key Laboratory of Global Change and Marine-Atmospheric Chemistry,State Oceanic Administration(SOA),Xiamen,361005,China 2 Third Institute of Oceanography,SOA,Xiamen 361005,China 3 Chinese Arctic and Antarctic Administration,Beijing 100860,China 4 University of Georgia,Athens,GA 30622,USA

Polar oceans play an important role in the global carbon cycle.Measurements of atmospheric and surface sea water pCO2 were conducted during the 1st,2nd and 3rd Chinese National Arctic Research Expedition cruises in July to September of 1999,2003 and 2008,respectively.The Arctic carbon sink increases during the past 10 years from 1999 to 2008 accompanying the receding of sea ice cover.Especially,our summer 2008 CO2 data suggest that increased initial ice-melting will enhance air-sea CO2 flux greatly in the western Arctic Ocean.Greater summertime ice melting is projected to occur in the following years with an increasing speed.The increased CO2 uptake by the Arctic Ocean slopes and basins,thus,may provide a negative feedback mechanism to reduce atmospheric CO2 and thus rate of warming.However,such CO2 sink will be weakened gradually as our data also suggest that a complete ice-free condition in the slope and basin areas for a prolong period during the summer may result in an increase in surface pCO2 and reduced CO2 flux（though still higher than today）.Furthermore,warming and ice-melt also will promote permafrost thawing in the Arctic continent and thus increases river inputs of dissolved inorganic carbon（DIC） and organic carbon that are expected to be recycled as CO2,thus further reducing the capacity of the Arctic Ocean to absorb the atmospheric CO2.

关键词： carbon flux Arctic Ocean pCO2 Rapid Changing

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国际重大研究计划与中国生态系统研究展望

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地理 2014年第6期

作者：孙鸿烈陈宜瑜于贵瑞于秀波

以“传播新知识、交流新思想、展示新成果”为宗旨的中国生态大讲堂百期学术演讲暨2014年春季研讨会于2014年4月25日在北京举行。本次研讨会以“国际重大研究计划与中国生态系统研究展望”为主题，邀请秦大河、姚檀栋、傅伯杰、崔鹏4位... 详细信息

以“传播新知识、交流新思想、展示新成果”为宗旨的中国生态大讲堂百期学术演讲暨2014年春季研讨会于2014年4月25日在北京举行。本次研讨会以“国际重大研究计划与中国生态系统研究展望”为主题，邀请秦大河、姚檀栋、傅伯杰、崔鹏4位中国科学院院士和马克平、于贵瑞、张佳宝、秦伯强4位知名专家作了主题报告。8位报告人分别介绍了政府间气候变化专门委员会(IPCC)、未来地球(Future Earth)、第三极环境(Third Pole Environment)、国际长期生态监测研究网络(ILTER)、生物多样性和生态系统服务政府间科学—政策平台(IPBES)、生物多样性计划(DIVERSITAS)、通量观测研究计划(fluxNet)等国际重大研究计划的进展和趋势，并就山洪泥石流风险分析与管理、碳通量空间格局及生物地理生态学机制、农田地力提升和湖泊富营养化治理等领域的前沿科学问题和研究进展作了系统阐释。基于8位报告人的演讲，本文评述了8个报告的主要内容和亮点工作，分析了国际生态环境领域重大国际研究计划的发展趋势及其对中国生态系统研究的启示，讨论了中国相关领域的科学研究方向和主要问题。

关键词：中国生态大讲堂国际重大研究计划政府间气候变化专门委员会未来地球 “第三极环境”计划国际长期生态监测研究网络生物多样性和生态系统服务政府间科学—政策平台生物多样性计划通量观测研究计划生态系统服务山洪泥石流碳通量农田地力湖泊富营养化 China Ecological Forum major international research programs IPCC Future Earth Third Pole Environment Ilter Ipbes fluxnet Diversitas ecosystem service debris flow carbon flux farmland fertility lake eutrophication

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