Watch data explained

A number of core datasets have been generated by the WATCH project. These are publicly available from 1 August 2011. They include the meteorological data used by global hydrological or land surface models and model outputs. All the WATCH data is in NetCDF format. NetCDF is an extremely efficient data format for large volumes of data and is becoming popular with modellers as both an input and output format. Data conforms to the ALMA data exchange convention.

The data sets can be accessed via the CEH Gateway catalogue.
Note: this Gateway catalogue is functional and data can be found using the search term WATCH

Outline of what is available (click on each heading for a visual representation):

  1. WATCH Forcing Data 20th Century –a meteorological forcing dataset for land surface and hydrological models. Five variables are it 6 hourly resolution and five variables are at 3 hourly resolution. Rainfall maps shown on this website used this rainfall+snowfall data, to map total precipitation.
  2. WATCH Driving Data 21st Century – Similar to the WATCH forcing data but for the 21st Century and is constructed from model output not interpolated observational data. Two climate scenarios, B2, A2 and a Control were each run through three climate models, CNRM, ECHAM5 and IPSL to produce a total of 9 sets of future driving data. Output data is at monthly resolution.
  3. WATCH 20th Century Model Output Datasets – The WATCH forcing data has been run through nine land surface or global hydrological models, to produce a range of output variables. CEH ran the data through JULES to produce the maps shown on this website under Freshwater, Evaporation and Land.
  4. WATCH 21st Century Model Output The 21st century WATCH driving data was put through ten land surface and global hydrological models.

This data is currently hosted by IIASA in Austria on a basic FTP site available to project partners only.