PRECIPITATION

WET-DAY FREQUENCY
Number of days/mo with Precipitation

TEMPERATURE

GROUND-FROST FREQUENCY
Number of days/mo with Min. Temp. < 0°C

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Select a Point Climatology

Click anywhere over land on the map to see barplots of the local monthly climatology of precipitation, monthly average of daily maximum, minimum, and mean temperature, wet-day frequency, and ground frost frequency.

Use the "Map Type" drop-down menu to display maps of the Koeppen climate classification, elevation, and monthly climatological animations of precipitation, wet-day frequency, mean temperature, minimum temperature, maximum temperature, and frost-day frequency. The monthly climatologies are calculated using the University of East Anglia Climatic Research Unit TS2.1 data set on a 0.5° lat/lon grid. The base period used for the climatology is 1971-2000.

Dataset Documentation

Select a Point Climatology

Monthly Climatological Variables

Data
University of East Anglia Climatic Research Unit TS2.1 monthly precipitation, monthly average of daily maximum, minimum, and mean temperature, wet-day frequency, and ground frost frequency on a 0.5° lat/lon grid
Data Source
University of East Anglia Climatic Research Unit (CRU TS2.1)
Analysis
Monthly climatology of monthly precipitation, monthly average of daily maximum, minimum, and mean temperature, wet-day frequency, and ground frost frequency for the 1971-2000 base period
Reference
Mitchell, T. D., P. D. Jones. An improved method of constructing a database of monthly climate observations and associated high-resolution grids. Int. J. Climatol. 25, 2005.

Koeppen Climate Classification

Data Source
U.N. Food and Agriculture Organization (FAO) Agrometeorology Group
Analysis
Koeppen climate classification prepared by the FAO Agrometeorology Group derived from mean monthly climate data prepared in 1991 by R. Leemans and W. Cramer and published by the International Institute for Applied Systems Analysis (IIASA). This Koeppen classification is based upon monthly rainfall and temperatures, including: average monthly temperature of the warmest month, average monthly temperature of the coldest month, average thermal amplitude between the coldest and warmest months, number of months with temperature exceeding 10°C, and winter and summer rains. For more detailed information see this Brief Guide to Koeppen Climate Classification System.

Elevation

Data Source
National Oceanic and Atmospheric Administration (NOAA) National Geophysical Data Center (NGDC) ETOPO1 ice surface elevation/bathymetry
Description
ETOPO1 Grid Registered 1 Arc-Minute Global Relief Model
Reference
Amante, C. and B. W. Eakins, ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce, Boulder, CO, July 2008.

Dataset

Access the dataset used to create this map.

Helpdesk

Contact help@iri.columbia.edu with any technical questions or problems with this Map Room.