See if these two papers might be relevant:

1. http://onlinelibrary.wiley.com/doi/10.1002/joc.1216/full

2. http://onlinelibrary.wiley.com/doi/10.1002/joc.1118/full

Very interesting! Thank you!

There is a good and comprehensive report for Switzerland inclding Alps region using instrumental data for the last say 100 - 150 years. It is written by my professor in Bern University.

https://boris.unibe.ch/53522/1/wcc280.pdf

Another paper is witten by Thomas Frey from Meteoswiss:

http://onlinelibrary.wiley.com/store/10.1256/wea.278.05/asset/200661708_ftp.pdf?v=1&t=jbrf8r1h&s=9b75bb910fa5b1feaa93df3c7cc89e7dec1bd832

Hi Giacomo.

There are several papers on the subject.

Precipitation:

http://onlinelibrary.wiley.com/doi/10.1002/joc.3794/full

http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1097-0088(19980630)18:8%3C873::AID-JOC255%3E3.0.CO;2-9/abstract

Climate change scenarios:

Article 21st century climate change in the European Alps-A review

Temperature and related:

http://www.meteoswiss.admin.ch/home/climate/present-day/climate-trends.html?filters=ths200m0_swiss_year_1864-trend

https://www.climatechangepost.com/austria/climate-change/

One thing, though, needs to be considered when talking about precipitation. Rainfall is one thing, but snowfall is very difficult to measure and subject to large errors. Current datasets are in the making for this latter aspect and thus the use of data must be done with care.

Cheers,

Vincenzo