Here are some useful links for research (mainly but not limited to Mexico and the UK):
Climate models
ESGF: Earth System Grid Federation. Includes data from CMIP5, CORDEX, SPECS and CLIPC
Hydrological models
WEAP: Water Evaluation and Planning System developed by the Stockholm Environment Institute
HEC-HMS: Hydrologic Modeling System developed by the Hydrologic Engineering Center from the US Army Corps of Engineers
GR4J: Modèle du Génie Rural à 4 paramètres Journalier developed by the Hydrological Research Group from the National Research Institute of Science and Technology for Environment and Agriculture
HYMOD2: Improved version of the HYMOD model (Matlab code)
AWBM: Australian Water Balance Model developed by Walter Boughton
HBV Light: Based on the HBV model developed by the SMHI
Record of observations
CEH-GEAR: Gridded estimates of daily and monthly areal rainfall for the UK developed by the Centre for Ecology and Hydrology
CHESS-PE: Climate hydrology and ecology research support system potential evapotranspiration for GB
CHESS-met: Climate hydrology and ecology research support system meteorology dataset for GB, includes values of mean air temperature, specific humidity, wind speed, downward long wave radiation, downward shortwave radiation, precipitation, air temperature and daily temperature range
CLICOM Mexico: Mexico’s climate database managed by CICESE
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