干旱区生态环境知识资源中心(Arid): Dew amount and its long-term variation in the Kunes River Valley, Northwest China

Arid

DOI	10.1007/s40333-022-0099-4
	Dew amount and its long-term variation in the Kunes River Valley, Northwest China
	Feng Ting; Huang Farong; Zhu Shuzhen; Bu Lingjie; Qi Zhiming; Li Lanhai
通讯作者	Li, LH
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2022
卷号	14 期号:7 页码:753-770
英文摘要	Dew is an essential water resource for the survival and reproduction of organisms in arid and semi-arid regions. Yet estimating the dew amount and quantifying its long-term variation are challenging. In this study, we elucidate the dew amount and its long-term variation in the Kunes River Valley, Northwest China, based on the measured daily dew amount and reconstructed values (using meteorological data from 1980 to 2021), respectively. Four key results were found: (1) the daily mean dew amount was 0.05 mm during the observation period (4 July-12 August and 13 September-7 October of 2021). In 35 d of the observation period (i.e., 73% of the observation period), the daily dew amount exceeded the threshold (>0.03 mm/d) for microorganisms; (2) air temperature, relative humidity, and wind speed had significant impacts on the daily dew amount based on the relationships between the measured dew amount and meteorological variables; (3) for estimating the daily dew amount, random forest (RF) model outperformed multiple linear regression (MLR) model given its larger R-2 and lower MAE and RMSE; and (4) the dew amount during June-October and in each month did not vary significantly from 1980 to the beginning of the 21(st) century. It then significantly decreased for about a decade, after it increased slightly from 2013 to 2021. For the whole meteorological period of 1980-2021, the dew amount decreased significantly during June-October and in July and September, and there was no significant variation in June, August, and October. Variation in the dew amount in the Kunes River Valley was mainly driven by relative humidity. This study illustrates that RF model can be used to reconstruct long-term variation in the dew amount, which provides valuable information for us to better understand the dew amount and its relationship with climate change.
英文关键词	dew amount long-term variation meteorological variables random forest model multiple linear regression model Kunes River Valley
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000828116300004
WOS关键词	GRASSLAND AREA ; ENERGY-BALANCE ; NEGEV DESERT ; LAND-USE ; WATER ; FOG ; COLLECTION ; ABSORPTION ; DEPOSITION ; ECOSYSTEM
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393324
推荐引用方式 GB/T 7714	Feng Ting,Huang Farong,Zhu Shuzhen,et al. Dew amount and its long-term variation in the Kunes River Valley, Northwest China[J],2022,14(7):753-770.
APA	Feng Ting,Huang Farong,Zhu Shuzhen,Bu Lingjie,Qi Zhiming,&Li Lanhai.(2022).Dew amount and its long-term variation in the Kunes River Valley, Northwest China.JOURNAL OF ARID LAND,14(7),753-770.
MLA	Feng Ting,et al."Dew amount and its long-term variation in the Kunes River Valley, Northwest China".JOURNAL OF ARID LAND 14.7(2022):753-770.