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Response of Hydrological Cycle to Recent Climate Changes in the Tibetan Plateau

Title data

Yang, Kun ; Ye, Baisheng ; Zhou, Degang ; Wu, Bingyi ; Foken, Thomas ; Qin, Jun ; Zhou, Zhaoye:
Response of Hydrological Cycle to Recent Climate Changes in the Tibetan Plateau.
In: Climatic Change. Vol. 109 (December 2011) Issue 3/4 . - pp. 517-534.
ISSN 1573-1480
DOI: https://doi.org/10.1007/s10584-011-0099-4

Abstract in another language

The Tibetan Plateau (TP) surfaces have been experiencing an overall rapid warming and wetting while wind speed and solar radiation have been declining in the last three decades. This study investigated how climate changes influenced the hydrological cycle on the TP during 1984-2006. To facilitate the analysis, a land surface model was used to simulate surface water budget at all CMA (China Meteorological Administration) stations on the TP. The simulated results were first validated against observed ground temperature and observation-derived heat flux on the western TP and observed discharge trends on the eastern TP. The response of evaporation and runoff to the climate changes was then analyzed. Major finding are as follows.(1) Surface water balance has been changed in recent decades. Observed precipitation shows insignificant  increasing trends in central TP and decreasing trends along the TP periphery while evaporation shows overall  increasing trends, leading to decreased discharge at major TP water resource areas (semi-humid and humid  zones in the eastern and southern TP).(2) At the annual scale, evaporation is water-limited in dry areas and energy-limited (radiation and air temperature) in wet areas; these constraints can be interpreted by the Budyko-curve. Evaporation in autumns and winters was strongly controlled by soil water storage in summers, weakening the dependence of evaporation on precipitation at seasonal scales.(3) There is a complementary effect between the simulated actual evaporation and potential evaporation, but this complementary relationship may deviate from Bouchet’s hypothesis when vapor pressure deficit (or air temperature) is too low, which suppresses the power of vapor transfer.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER92258
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 13 Aug 2015 06:11
Last Modified: 13 Aug 2015 06:11
URI: https://eref.uni-bayreuth.de/id/eprint/17937