Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11430-015-5133-3 |
Influence of environmental factors on land-surface water and heat exchange during dry and wet periods in the growing season of semiarid grassland on the Loess Plateau | |
Yue Ping1,2,3,4; Zhang Qiang1,2,3; Zhao Wen1,2,3; Wang RunYuan1,2,3; Zhang Liang1,2,3; Wang WenYu1,2,3; Shi JinSen4; Hao XiaoCui1,2,3 | |
通讯作者 | Yue Ping |
来源期刊 | SCIENCE CHINA-EARTH SCIENCES |
ISSN | 1674-7313 |
EISSN | 1869-1897 |
出版年 | 2015 |
卷号 | 58期号:11页码:2002-2014 |
英文摘要 | On the basis of information from the project "Land-surface Processes and their Experimental Study on the Chinese Loess Plateau", we analyzed differences in land-surface water and heat processes during the main dry and wet periods of the semiarid grassland growing season in Yuzhong County, as well as the influences of these environmental factors. Studies have shown that there are significant differences in changes of land-surface temperature and humidity during dry and wet periods. Daily average normalized temperature has an overall vertical distribution of "forward tilting" and "backward tilting" during dry and wet periods, respectively. During the dry period, shallow soil above 20-cm depth is the active temperature layer. The heat transfer rate in soil is obviously different during dry and wet periods. During the dry period, the ratio of sensible heat flux to net radiation (H/Rn) and the value of latent heat flux to net radiation (LE/Rn) have a linear relationship with 5-cm soil temperature; during the wet period, these have a nonlinear relationship with 5-cm soil temperature, and soil temperature of 16A degrees C is the critical temperature for changes in the land-surface water and heat exchange trend on a daily scale. During the dry period, H/Rn and LE/Rn have a linear relationship with soil water content. During the wet period, these have a nonlinear relationship with 5-cm soil water content, and 0.21 m(3) m(-3) is the critical point for changes in the land-surface water and heat exchange trend at daily scale. During the dry period, for vapor pressure deficit less than 0.7 kPa, H/Rn rises with increased vapor pressure deficit, whereas LE/Rn decreases with that increase. When that deficit is greater than 0.7 kPa, both H/Rn and LE/Rn tend to be constant. During the wet period, H/Rn increases with the vapor pressure deficit, whereas LE/Rn decreases. The above characteristics directly reflect the effect of differences in land-surface environmental factors during land-surface water and heat exchange processes, and indirectly reflect the influences of cloud precipitation processes on those processes. |
英文关键词 | Loess Plateau dry and wet periods environmental factors land-surface water and heat exchange |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000363258600010 |
WOS关键词 | ENERGY-BALANCE CLOSURE ; SOIL-TEMPERATURE ; TIBETAN PLATEAU ; ARID REGION ; FLUX ; PARAMETERS ; CLIMATE ; ALBEDO ; CHINA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190344 |
作者单位 | 1.China Meteorol Adm, Inst Arid Meteorol, Lanzhou 730020, Peoples R China; 2.Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Peoples R China; 3.Key Open Lab Arid Climat Change & Disaster Reduct, Lanzhou 730020, Peoples R China; 4.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China |
推荐引用方式 GB/T 7714 | Yue Ping,Zhang Qiang,Zhao Wen,et al. Influence of environmental factors on land-surface water and heat exchange during dry and wet periods in the growing season of semiarid grassland on the Loess Plateau[J]. 兰州大学,2015,58(11):2002-2014. |
APA | Yue Ping.,Zhang Qiang.,Zhao Wen.,Wang RunYuan.,Zhang Liang.,...&Hao XiaoCui.(2015).Influence of environmental factors on land-surface water and heat exchange during dry and wet periods in the growing season of semiarid grassland on the Loess Plateau.SCIENCE CHINA-EARTH SCIENCES,58(11),2002-2014. |
MLA | Yue Ping,et al."Influence of environmental factors on land-surface water and heat exchange during dry and wet periods in the growing season of semiarid grassland on the Loess Plateau".SCIENCE CHINA-EARTH SCIENCES 58.11(2015):2002-2014. |
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