NDLI: Changes in terrestrial surface dry and wet conditions on the Loess Plateau (China) during the last half century

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Changes in terrestrial surface dry and wet conditions on the Loess Plateau (China) during the last half century

Content Provider	Springer Nature Link
Author	Xiao, GuoJu Wang, Yang Lu, DengRong Wang, RunYuan Yue, Ping Liu, LinChun Yao, YuBi Yang, JinHu
Copyright Year	2013
Abstract	This paper, using a revised Penman-Monteith model, computed the terrestrial surface humidity index of the Loess Plateau (China) based on climatic factors of monthly mean temperature, maximum temperature, minimum temperature, relative humidity, precipitation, wind speed and sunshine duration observed on the plateau from 1961 to 2008. The temporal-spatial distribution, anomaly distribution and sub-regional temporal variations of the terrestrial surface dry and wet conditions were analyzed as well. The results showed a decreasing trend in the annual average surface humidity from the southeast to the northwest in the research area. Over the period of 1961–2008, an aridification tendency appeared sharply in the central interior region of the Loess Plateau, and less sharply in the middle part of the region. The border region showed the weakest tendency of aridification. It is clear that aridification diffused in all directions from the interior region. The spatial anomaly distribution of the terrestrial surface dry and wet conditions on the Loess Plateau can be divided into three key areas: the southern, western and eastern regions. The terrestrial annual humidity index displayed a significantly descending trend and showed remarkable abrupt changes from wet to dry in the years 1967, 1977 and 1979. In the above mentioned three key areas for dry and wet conditions, the terrestrial annual humidity index exhibited a fluctuation period of 3–4 years, while in the southern region, a fluctuation period of 7–8 years existed at the same time.
Starting Page	15
Ending Page	24
Page Count	10
File Format	PDF
ISSN	16746767
Journal	Journal of Arid Land
Volume Number	5
Issue Number	1
Language	English
Publisher	SP Science Press
Publisher Date	2012-12-04
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	dry and wet conditions temporal variation Sustainable Development Physical Geography spatial distribution Penman-Monteith model Loess Plateau Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Water Science and Technology Management, Monitoring, Policy and Law

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