Multimethod assessment of evapotranspiration shifts due to non-irrigated agricultural development in Sweden

JOURNAL OF HYDROLOGY

卷:484

Article

Jaramillo, Fernando¹  Prieto, Carmen¹  Lyon, Steve W.¹  Destouni, Georgia¹ 

[1] Stockholm Univ, Dept Phys Geog & Quaternary Geol, Bert Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden

关键词: Evapotranspiration;    Climate change;    Land use change;    Agriculture;    Hydrological flow partitioning;    Hydroclimatic change;   

DOI  :  10.1016/j.jhydrol.2013.01.010

来源: Elsevier

【 摘 要 】

During the 20th century, Sweden underwent a persistent agricultural development. In this study, we use and combine historical hydroclimatic and agricultural data to investigate how this large scale change of land use, and subsequent intensification of crop production, affected regional hydrology in two adjacent Swedish drainage basins. We find a main increase of evapotranspiration (ET) as cultivated area and/or crop production increased during the period 1901-1940. Thereafter, ET stabilized at a new higher level. Comparison between the data given, water balance constrained ET quantification (ETwb), and a range of different comparative estimates of purely climate driven ET (ETclim) shows that only 31% of the steep 1901-1940 increase of ETwb can be explained by climate change alone. The remaining 69% of this ETwb shift, which occurred in both investigated drainage basins, is instead explainable to large degree by the regional land use conversion from seminatural grasslands to cultivated land and associated enhanced productivity of herbaceous species. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free