| ESTIMATE OF METHANE EMISSIONS FROM RICE FIELDS IN CHINA BY CLIMATE-BASED NET PRIMARY PRODUCTIVITY |
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| 作者姓名： | KANG Guo-ding CAI Zu-cong ZHANG Zi-heng XIAO Peng-feng |
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| 作者单位： | 1.Department of Demography and Economics，Nanjing College for Population Programme Management，Nanjing 210042，P. R. China; 2. Institute of Soil Science，Chinese Academy of Sciences，Nanjing 210008，P. R. China; 3. Department of Urban and Resources Sciences，Nanjing University，Nanjing 210093，P. R. China |
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| 基金项目： | UndertheauspicesoftheMajorStateBasicResearchDevelopmentProgramofChina (No.G1999011805)，Asi-a-PacificNetworkforGlobalChangeResearch(No.APN2000-01，APN2001-16) andNanjingCollegeforPopulationPro-grammeManagement ScienceFund (No.NJCPPM200301) |
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| 摘 要： | 1INTRODUCTIONIrrigated ricefieldsarecharacterizedbylargespatialandtemporalvariationsin CH4 emissiontotheatmo-sphere.Accordingly,thereisagreatuncertaintyintheestimate ofCH4 emissionsfromricefields.GreateffortshavebeenmadetoestimatetheCH4 emissionsfromricefieldsandseveralapproacheshavebeendeveloped.TherepresentativemethodsincludetheIPCC(Inter-governmentPanelofClimateChange)region-specificemissionfactormethodandthemodelcalculationmethod.Toimprovethecalculationaccuracy,theIPCCmethodreq…
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| 关 键 词： | 甲烷泄漏 稻田 气候因素 剩余初级产品 |
| 收稿时间： | 7 June 2004 |
Estimate of methane emissions from rice fields in China by climate-based net primary productivity |
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| KANG Guo-ding,,CAI Zu-cong,ZHANG Zi-heng,,XIAO Peng-feng.ESTIMATE OF METHANE EMISSIONS FROM RICE FIELDS IN CHINA BY CLIMATE-BASED NET PRIMARY PRODUCTIVITY[J].Chinese Geographical Science,2004,14(4):326-331. |
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| Authors: | Kang Guo-ding Cai Zu-cong Zhang Zi-heng Xiao Peng-feng |
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| Institution: | (1) Department of Demography and Economics, Nanjing College for Population Programme Management, 210042 Nanjing, P.R. China;(2) Institute of Soil Science, Chinese Academy of Sciences, 210008 Nanjing, P. R. China;(3) Department of Urban and Resources Sciences, Nanjing University, 210093 Nanjing, P. R. China |
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| Abstract: | Rice fields provide food for over half of the world population but are also an important source of atmospheric CH4. Using the climate-based GIS empirical model and the meteorological data collected from 600 meteorological stations in China,
with county as the basic unit, the net primary productivity (NPP) of rice fields in China in 1990, 1995, 1998, and 2000 were
estimated to be in the range from 202.19×1012g C in 1990 to 163.46×1012g C in 2000. From the measured data of the factors affecting CH4 emission and NPP, the conversion ratio of the NPP into CH4 emission for the rice fields of China was determined to be 1.8%. Using this ratio and estimated NPP, the CH4 emissions from rice fields of China in 1990, 1995, 1998, and 2000 were estimated to be 7.24×1012, 6.31×1012, 6.77×1012 and 5.85×1012g CH4, respectively.
Foundation item: Under the auspices of the Major State Basic Research Development Program of China (No. G1999011805), Asia-Pacific
Network for Global Change Research (No. APN2000-01, APN2001-16) and Nanjing College for Population Programme Management Science
Fund (No. NJCPPM200301)
Biography: KANG Guo-ding (1955-), male, a native of Jiangyin of Jiangsu Province, Ph.D., specialized in remote sensing & GIS,
and global change. E-mail: kgdnju@126.com |
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| Keywords: | CH4 emissions rice fields net primary productivity climatic factor |
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