Journal metrics

Journal metrics

  • IF value: 4.256 IF 4.256
  • IF 5-year value: 4.819 IF 5-year 4.819
  • CiteScore value: 4.10 CiteScore 4.10
  • SNIP value: 1.412 SNIP 1.412
  • SJR value: 2.023 SJR 2.023
  • IPP value: 3.97 IPP 3.97
  • h5-index value: 58 h5-index 58
  • Scimago H index value: 99 Scimago H index 99
Discussion papers | Copyright
https://doi.org/10.5194/hess-2018-226
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 23 May 2018

Research article | 23 May 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

Resolution-dependence of future European soil moisture droughts

Eveline C. van der Linden, Reindert J. Haarsma, and Gerard van der Schrier Eveline C. van der Linden et al.
  • Royal Netherlands Meteorological Institute, De Bilt, Netherlands

Abstract. Global climate models project an intensification of future soil moisture droughts over large parts of Europe. 
This paper investigates the impact of model resolution on the severity and seasonal cycle of future European droughts.
 We use a 6-member ensemble of the general circulation model EC-Earth to study two periods representative of the start and end of the 21st century under low-to-moderate greenhouse gas forcing (RCP4.5).
 In our study area, central-western Europe, at high spatial resolution (~25km) droughts are more severe and start earlier in the season than at standard resolution (~112km).
 Here, changes in the large-scale atmospheric circulation and local soil moisture feedbacks lead to enhanced evapotranspiration in spring and reduced precipitation in summer.
 A more realistic position of the storm track at high model resolution leads to reduced biases in precipitation and temperature in the present-day climatology, which act to amplify evapotranspiration in spring.
 Furthermore, in the high resolution model a stronger anticyclonic anomaly over the British Isles extends over our study region and supports soil drying.
 The resulting drier soil induces stronger soil moisture feedbacks that amplify drought conditions in summer. 
In addition, soil moisture-limited evapotranspiration in summer promotes sensible heating of the boundary layer, which leads to a lower relative humidity with less cloudy conditions, an increase of dry summer days, and more incoming solar radiation. As a result a series of consecutive hot and dry summers appears in the future climate. 
The enhanced drying at high spatial resolution suggests that future projections of central-western European droughts by CMIP5 models have been potentially underestimated.

Download & links
Eveline C. van der Linden et al.
Interactive discussion
Status: open (extended)
Status: open (extended)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Eveline C. van der Linden et al.
Eveline C. van der Linden et al.
Viewed
Total article views: 647 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
518 124 5 647 5 5
  • HTML: 518
  • PDF: 124
  • XML: 5
  • Total: 647
  • BibTeX: 5
  • EndNote: 5
Views and downloads (calculated since 23 May 2018)
Cumulative views and downloads (calculated since 23 May 2018)
Viewed (geographical distribution)
Total article views: 647 (including HTML, PDF, and XML) Thereof 645 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 15 Aug 2018
Publications Copernicus
Download
Short summary
This paper provides a process-based assessment on the impact of spatial model resolution on projections of European soil moisture droughts. In central-western Europe, simulated future droughts are more severe and start earlier in the season at higher global resolution compared to conventional resolution simulations. The enhanced drying suggests that future projections of central-western European droughts by conventional resolution global climate models have been potentially underestimated.
This paper provides a process-based assessment on the impact of spatial model resolution on...
Citation
Share