Characteristics of land surface heat and water exchange under different soil freeze/thaw conditions over the central Tibetan Plateau
文献类型：期刊论文
| 作者 | Guo, Donglin1,3; Yang, Meixue2; Wang, Huijun1 |
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2011-07-30 |
| 卷号 | 25期号:16页码:2531-2541 |
| ISSN号 | 0885-6087 |
| 关键词 | Tibetan Plateau soil freeze/thaw process energy closure budget |
| DOI | 10.1002/hyp.8025 |
| 通讯作者 | Guo, Donglin(guodl@mail.iap.ac.cn) |
| 英文摘要 | Freezing and thawing processes at the soil surface play an important role in determining the nature of Tibetan land and atmosphere interactions. In this study, land surface water and heat exchanges under different freezing and thawing conditions over the central Tibetan Plateau were investigated using observations from the Coordinated Enhanced Observing Period/Asia-Australia Monsoon Project on the Tibetan Plateau, and the Simultaneous Heat and Water Model. During the freezing and thawing stages, significant diurnal variation of soil temperature resulted in a diurnal cycle of unfrozen water content at the surface. Radiation and energy components and evapotranspiration averaged over four freeze/thaw stages also changed diurnally. On average, the surface albedo (0.68) during the completely frozen stage was sharply higher than those during the freezing, thawing, and completely thawed stages due to the snow cover. The Bowen ratios were 3.1 and 2.5 in the freezing and thawing stages, respectively, but the ratio was only 0.5 in the completely thawed stage. Latent heat flux displayed distinctly better correlation with unfrozen soil water content during the freezing and thawing stages than during the completely frozen and thawed stages. This implies that the diurnal cycle of unfrozen soil water, resulting from diurnal freeze/thaw cycles at the surface, has a significant impact on latent heat flux. A surface energy imbalance problem was encountered, and the possible sources of error were analysed. Copyright. (C) 2011 John Wiley & Sons, Ltd. |
| 收录类别 | SCI |
| WOS关键词 | ENERGY-BALANCE CLOSURE ; ASIAN SUMMER MONSOON ; EURASIAN SNOW COVER ; PARAMETERIZATION SIB2 ; FLUX MEASUREMENTS ; ATMOSPHERIC GCMS ; PINE FOREST ; BUDGET ; NORTHERN ; EVAPOTRANSPIRATION |
| WOS研究方向 | Water Resources |
| WOS类目 | Water Resources |
| 语种 | 英语 |
| 出版者 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000294200800005 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556565 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Guo, Donglin |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Nansen Zhu Int Res Ctr, Beijing 100029, Peoples R China 2.Chinese Acad Sci, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Donglin,Yang, Meixue,Wang, Huijun. Characteristics of land surface heat and water exchange under different soil freeze/thaw conditions over the central Tibetan Plateau[J]. HYDROLOGICAL PROCESSES,2011,25(16):2531-2541. |
| APA | Guo, Donglin,Yang, Meixue,&Wang, Huijun.(2011).Characteristics of land surface heat and water exchange under different soil freeze/thaw conditions over the central Tibetan Plateau.HYDROLOGICAL PROCESSES,25(16),2531-2541. |
| MLA | Guo, Donglin,et al."Characteristics of land surface heat and water exchange under different soil freeze/thaw conditions over the central Tibetan Plateau".HYDROLOGICAL PROCESSES 25.16(2011):2531-2541. |
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来源：寒区旱区环境与工程研究所
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