Article (Scientific journals)
Impact of climate change on potential evapotranspiration under a historical and future climate scenario in the Huang-Huai-Hai Plain, China
Liu, Qin; Yan, Changrong; Ju, Hui et al.
2018In Theoretical and Applied Climatology
Peer Reviewed verified by ORBi
 

Files


Full Text
Impact of climate change on potential evapotranspiration under a historical and future climate scenario in the Huang-Huai-Hai Plain, China final.docx
Author preprint (203.76 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
potential evapotranspiration; RCP 8.5 scenario; spatiotemporal trends; sensitivity analysis; Huang-Huai-Hai plain
Abstract :
[en] Climate change is widely accepted to be one of the most critical problems faced by the Huang-Huai-Hai Plain (3H Plain), which is a region in which there is an over-exploitation of groundwater region and where future warmer and drought conditions might intensify crop water demand. In this study, the spatiotemporal patterns of ET0 and primary driving meteorological variables were investigated based on a historical and RCP 8.5 scenario daily data set from 40 weather stations over the 3H Plain using linear regression, spline interpolation method, a partial derivative analysis and multivariate regression. The results indicated a negative trend in all the analysis periods (except spring) of the past 54 years of which only summer and the entire year were statistically significant (p < 0.01) with slopes of -1.09 and -1.30 mm·a-1 respectively. In contrast, a positive trend was observed in all four seasons and the entire year under the RCP 8.5 scenario, with the biggest increment equal to 1.36 mm·a-1 in summer and an annual increment of 3.37 mm·a-1. The spatial patterns of the seasonal and annual ET0 exhibited the lowest values in southeastern regions and the highest values in northeastern parts of Shandong Province, probably because of the combined effects of various meteorological variables over the past 54 years. Relative humidity (RH) together with solar radiation (RS) were detected to be the main climatic factors controlling the reduction of ET0 in summer, autumn, and the entire year on the 3H Plain. ET0 in spring was mainly sensitive to changes in RS and RH, whereas ET0 in winter was most sensitive to changes in wind speed (WS) and decreased due to declining RH. Under the future RCP 8.5 scenario, the annual ET0 distribution displays a rich spatial structure with a clear northeast-west gradient and anarea with low values in the southern regions, which is similarly detected in spring and summer. The most sensitive and primary controlling variables with respect to the increment of future ET0 are in the first place RS and then mean temperature in spring, while turn to be mean temperature and then RS in summer. In autumn, future ET0 is most sensitive to RH changes. WS and RH are the controlling variables for ET0 in winter. Annual future ET0 is most sensitive to RH changes and accordingly RS is responsible for the predicted increment of the annual ET0. Better understanding of current and future spatiotemporal patterns of ET0 and of the regional response of ET0 to climate change can contribute to the establishment of a policy to realize a more efficient use of water resources and a sustainable agricultural production in the 3H Plain.
Research center :
TERRA Teaching and Research Centre - TERRA
BIOSE - Ingénierie des Bio‐Systèmes - ULiège
Disciplines :
Agriculture & agronomy
Author, co-author :
Liu, Qin
Yan, Changrong
Ju, Hui
Garré, Sarah  ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Echanges Eau-Sol-Plantes
Language :
English
Title :
Impact of climate change on potential evapotranspiration under a historical and future climate scenario in the Huang-Huai-Hai Plain, China
Publication date :
2018
Journal title :
Theoretical and Applied Climatology
ISSN :
0177-798X
eISSN :
1434-4483
Publisher :
Springer Science & Business Media B.V.
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
This research was supported by the 12th five-year plan of the National Key Technologies R&D Program (2012BAD09B01), the National Basic Research Program of China (973 Program) (2012CB955904) and the National Science Foundation for Young Scientists of China (41401510). We thank the University of Liège-Gembloux Agro-Bio Tech and more specifically the research platform AgricultureIsLife for the funding of the scientific stay in Belgium that made this paper possible
Available on ORBi :
since 23 January 2017

Statistics


Number of views
153 (17 by ULiège)
Number of downloads
3 (3 by ULiège)

Scopus citations®
 
25
Scopus citations®
without self-citations
25
OpenCitations
 
20

Bibliography


Similar publications



Contact ORBi