Past (1971-2018) and future (2021-2100) pan evaporation rates in the Czech Republic

被引：33

作者：

Mozny, Martin ^{[1
,2
]}

Trnka, Miroslav ^{[3
,4
]}

Vlach, Vojtech ^{[1
,6
]}

Vizina, Adam ^{[5
]}

Potopova, Vera ^{[2
]}

Zahradnicek, Pavel ^{[3
]}

Stepanek, Petr ^{[3
]}

Hajkova, Lenka ^{[1
]}

Staponites, Linda ^{[5
]}

Zalud, Zdenek ^{[4
]}

机构：

[1] Czech Hydrometeorol Inst, Dept Biometeorol Applicat, Na Sabatce 17, Prague 14306, Czech Republic

[2] Czech Univ Life Sci Prague, Kamycka 129, Prague 16500 6, Suchdol, Czech Republic

[3] Czech Acad Sci, Global Change Res Inst, Belidla 986-4b, Brno 60300, Czech Republic

[4] Mendel Univ Brno, Zemedelska 1, Brno 61300, Czech Republic

[5] TG Masaryk Water Res Inst, Podbabska 2582-30, Prague 16000 6, Czech Republic

[6] Charles Univ Prague, Fac Sci, Dept Phys Geog & Geoecol, Albertov 6, Prague 12843 2, Czech Republic

来源：

JOURNAL OF HYDROLOGY | 2020年 / 590卷

关键词：

Pan evaporation; Hydrological cycle; Climate change; Drought; Vapor pressure deficit; REFERENCE EVAPOTRANSPIRATION; WIND SPEEDS; TRENDS; PLATEAU; SERIES;

D O I：

10.1016/j.jhydrol.2020.125390

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Evaporation from open water surfaces is often estimated based on the pan evaporation (E-pan), which is an essential measure for estimating atmospheric evaporative demand. Within the Central European region, E-pan appears to be slightly underestimated in the case of the hydrological balance of water bodies. In the context of the recent multi-year period of drought, significant losses of surface water deposits were observed in countries of Central Europe. In spite of the 'evaporation paradox' phenomenon, E-pan is not generally decreasing as expected by many studies from past decades. Recorded observations from the Czech Republic show an increase in E-pan, which is associated with an increase in global radiation and vapor pressure deficit. The vast majority of meteorological stations show a strong or very strong increase in E-pan during April, June, July and August. During the 1971-2018 period, the annual mean E-pan has been increasing by an average of 2.97 mm yr(-1). For the period 2001-2018, the mean E-pan was 18% higher (519 mm) than the 1971-2000 average (440 mm). Our simulations of future scenarios, using regional climate models, predicted a growth in E-pan of up to 27-54%. Such an increase in evaporation would cause serious consequences for surface water availability and agricultural production during the periods of drought in the Czech Republic, as the drought period 2014-2018 has clearly demonstrated.

引用

页数：10