Carbon dioxide, water vapor, and heat fluxes over agricultural crop field in an arid oasis of Northwest China, as determined by eddy covariance
文献类型：期刊论文
| 作者 | Ji, Xi Bin1,2; Zhao, Wen Zhi1,2; Kang, Er Si2; Zhang, Zhi Hui1,2; Jin, Bo Wen1,2 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2011-10-01 |
| 卷号 | 64期号:3页码:619-629 |
| 关键词 | Arid region CO(2) flux Eddy covariance Heat flux Turbulent flux |
| ISSN号 | 1866-6280 |
| DOI | 10.1007/s12665-010-0883-x |
| 通讯作者 | Ji, Xi Bin(xuanzhij@ns.lzb.ac.cn) |
| 英文摘要 | Fluxes of carbon dioxide, water vapor, and heat were measured above crop canopy using the eddy covariance method during the 2008 maize growing season, over an agricultural field within an oasis located in the middle reaches of Heihe River basin, northwest China. The values for friction velocity, the Monin-Obukhov stability parameter, and energy balance closure indicated that the eddy covariance system at this study site provided reliable flux estimates. Results from measurements showed that the mean sensible heat flux was 70 W m(-2) with a maximum value of 164 W m(-2) (May) and a minimum value of 45 W m(-2) (July) during the maize growing season. In contrast, the mean latent heat was 278 W m(-2) with a maximum value of 383 W m(-2) (July) and minimum of 101 W m(-2) (May). The mean downward soil heat flux was 55 W m(-2) with a maximum value of 127 W m(-2) (May) and minimum of 49 W m(-2) (July). The magnitude of mean daytime net CO(2) uptake was -11.50 mu mol m(-2) s(-1) with a maximum value of -28.32 mu mol m(-2) s(-1) (18 and 19 July) and a minimum values of -0.32 mu mol m(-2) s(-1) (18 and 19 May). Correlation was observed between daytime half-hourly carbon dioxide flux and canopy conductance. In addition, the relationship between carbon dioxide flux and photosynthetically active radiation for selected days during different stages of maize growing season indicated the carbon dioxide flux uptake by the canopy was controlled by actual photosynthetic activity related to the variation of green leaf area index for the different growing stages. |
| 收录类别 | SCI |
| WOS关键词 | INLAND RIVER-BASIN ; ENVIRONMENT ; VEGETATION ; RESOURCES ; EXCHANGE ; FLUXNET ; CO2 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000295845300003 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556583 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Ji, Xi Bin |
| 作者单位 | 1.Chinese Acad Sci, Linze Inland River Basin Comprehens Res Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Key Lab Ecohydrol & Integrated River Basin Sci, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ji, Xi Bin,Zhao, Wen Zhi,Kang, Er Si,et al. Carbon dioxide, water vapor, and heat fluxes over agricultural crop field in an arid oasis of Northwest China, as determined by eddy covariance[J]. ENVIRONMENTAL EARTH SCIENCES,2011,64(3):619-629. |
| APA | Ji, Xi Bin,Zhao, Wen Zhi,Kang, Er Si,Zhang, Zhi Hui,&Jin, Bo Wen.(2011).Carbon dioxide, water vapor, and heat fluxes over agricultural crop field in an arid oasis of Northwest China, as determined by eddy covariance.ENVIRONMENTAL EARTH SCIENCES,64(3),619-629. |
| MLA | Ji, Xi Bin,et al."Carbon dioxide, water vapor, and heat fluxes over agricultural crop field in an arid oasis of Northwest China, as determined by eddy covariance".ENVIRONMENTAL EARTH SCIENCES 64.3(2011):619-629. |
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来源：寒区旱区环境与工程研究所
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