Rainfall - Time Series

This section is experimental

It aims to explore how far climate change is affecting rainfall? Actually, we have rather good models showing change in temperature, but few expertise up to what extend is it affecting the rainfall.

The information shown on this map was obtained using the rough data of "Chelsa Model" (CHELSA_CLIMATE).

We have aggregated these data (selecting the period 1927 to 2016, 90 years) by year and regrouped by period of 10 years. From this, we have clipped this information to river basin limits and we have prepared interactive maps (rectangular markers) with 2 possible selections :

(1) Difference between Period 1927-1986 (60 years) and 1987-2016 (30 years) in regard to the mean annual value for the whole 1927-2016 period. The result is in %. Positive value means more rainfall in the last 30 years than in the previous 60 years period.

(2) Mean Annual Rainfall in mm per decade for the period 1927-2016.

By clicking any point on the maps appearing in the pop up window, you get the related values. Open the layers by clicking on the upper right icone.

The green markers present graphic at some points of the river basins showing (1) the evolution of the rainfall during the whole period 1927-2016, (2) the average annual rainfall on the whole period and (3) the mobile average on periods of 5 years.

CHELSA is a high resolution (30 arc sec) climate data set for the earth land surface areas currently hosted by the Swiss Federal Institute for Forest, Snow and Landscape Research WSL. It includes monthly mean temperature and precipitation patterns for various time periods.

CHELSA is based on a quasi-mechanistical statistical downscaling of reanalysis and global circulation model output and is freely available in the download section.

Source of the model :

Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P. & Kessler, M. (2017) Climatologies at high resolution for the earth’s land surface areas. Scientific Data 4, 170122.

Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P., Kessler, M. (2017) Data from: Climatologies at high resolution for the earth’s land surface areas. Dryad Digital Repository. https://doi.org/10.5061/dryad.kd1d4

A technical specification including the units used can be found here: CHELSA V1.2: Technical specifications.

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