Abstract

We document the occurrence in December 2015 of unprecedented high monthly mean temperatures in the observational record of mountain sites in the eastern Alps. For the first time in the last 150 years mean December temperature exceeded 0 °C at elevations between 2100 and 2500 m, with December mean anomalies exceeding 6.5 °C with respect to the 1971–2000 mean. Along with the absence of snow cover, such temperatures might have lead to unprecedented winter ablation of glaciers in this elevation range. Smaller temperature anomalies occurred in surrounding low elevation sites, highlighting the key role of topography in this event. Specifically, strong inversions associated with the very stable synoptic conditions during the month amplified the anomalies at the high elevations of the mountain glacier sites. We analyze the processes underlying this exceptional event and place this anomaly within the context of future warming scenarios over the region.

Details

Title
Unprecedented heat wave in December 2015 and potential for winter glacier ablation in the eastern Alps
Author
Colucci, Renato R 1 ; Giorgi, Filippo 2 ; Torma, Csaba 3 

 Department of Earth System Sciences and Environmental Technology, Trieste, Italy 
 Earth System Physics Section, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy 
 Earth System Physics Section, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Department of Meteorology, Eötvös Loránd University and HAS Post-Doctoral Research Program, Budapest, Hungary 
Pages
1-7
Publication year
2017
Publication date
Aug 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1957129590
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.