干旱区生态环境知识资源中心(Arid): Characteristics of dew events in an arid artificial oasis cropland and a sub-humid cropland in China

Arid

	Characteristics of dew events in an arid artificial oasis cropland and a sub-humid cropland in China
	Meng Yao; Wen Xuefa
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:3 页码:399-408
英文摘要	Dew is an important source of water which significantly influences the physiological status of vegetation and the microclimate environment. For quantifying the characteristics of dew events and analyzing the underlying mechanism of dew formation in different ecosystems, we measured, based on the flux-profile method, the amount, frequency and duration of dew events in two croplands, an arid artificial oasis cropland in Zhangye, Gansu province and a sub-humid cropland in Luancheng, Hebei province in China. The results showed that dew events were observed in a total of 69 days in Zhangye, which accounted for 59% of the growing season (from 28 May to 21 September, 2012), while 128 days in Luancheng, which accounted for 79% of the growing season (from 5 April to 13 September, 2008). The frequencies of dew events were 2.8 and 2.4 times of those of precipitation in Zhangye and Luancheng, respectively. In addition, the dew amount reached up to 9.9 and 20.2 mm in Zhangye and Luancheng, which accounted for 9.5% and 4.1% of precipitation, respectively. The average amount of dew was 0.14 and 0.16 mm/night in Zhangye and Luancheng, respectively and the duration of dew events ranged from 0.5 to 12.0 h in the two study sites. Dew amounts were associated with the gradient of atmospheric water vapor concentration and dew duration (P<0.001) in both the two sites. The result implies that dew events play a more important role in crop growth in arid areas in comparison to sub-humid areas considering the dew occurrence frequency and the amount per night.
英文关键词	dew amount frequency of dew duration of dew flux-profile
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5688557
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335640
作者单位	Meng Yao, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Beijing 100101, China.; Wen Xuefa, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Beijing 100101, China.
推荐引用方式 GB/T 7714	Meng Yao,Wen Xuefa. Characteristics of dew events in an arid artificial oasis cropland and a sub-humid cropland in China[J],2016,8(3):399-408.
APA	Meng Yao,&Wen Xuefa.(2016).Characteristics of dew events in an arid artificial oasis cropland and a sub-humid cropland in China.Journal of Arid Land,8(3),399-408.
MLA	Meng Yao,et al."Characteristics of dew events in an arid artificial oasis cropland and a sub-humid cropland in China".Journal of Arid Land 8.3(2016):399-408.