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ANGLIA_CLIMATE_MONTH Global Monthly Climatology for the Twentieth Century (New et al.) NEW, M.; HULME, M.; JONES, P.D. Global Monthly Climatology for the Twentieth Century (New et al.) 2000 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/551 551

ABSTRACT: This is a data set of mean monthly surface climate data over global land areas, excluding Antarctica, for nearly all of the twentieth century. The data set is gridded at 0.5 degree latitude/longitude resolution and includes seven variables: precipitation, mean temperature, diurnal temperature range, wet-day frequency, vapour pressure, cloud cover, and ground-frost frequency. All variables have mean monthly values for the period 1901-1995, several have data as recent as 1998, and more data will be added by the data originators. In constructing the monthly grids the authors used an anomaly approach which attempts to maximize station data in space and time (New et al., 2000). In this technique, grids of monthly historic anomalies are derived relative to a standard normal period. Station measurement data for the years 1961-1990, extracted from the monthly data holdings of the Climatic Research Unit and the Global Historic Climatology Network (GHCN), served as the normal period (New et al., 1999). The anomaly grids were then combined with high-resolution mean monthly climatology to arrive at fields of estimated historical monthly surface climate. Data users are encouraged to see the companion file New et al. (2000) for a complete description of this technique and potential applications and limitations of the data set. For additional information, refer to the IPCC Data Distribution Centre. Access to the complete year-by-year monthly data set or to data more recent than posted here can be achieved by making a request with the Climate Impacts LINK Project at the Climatic Research Unit (email: d.viner@uea.ac.uk, web site: www.cru.uea.ac.uk/link ).

1900-01-01 1998-12-31 COMPLETE -90 90 -180 180 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

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Oak Ridge Tennessee 37831-6407 USA 2000-09-18 ORNL_DAAC THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) http://daac.ornl.gov/ 551 DATA CENTER CONTACT ORNL DAAC USER SERVICES ornldaac@ornl.gov +1(865)241-3952 +1(865)574-4665

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Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE ATMOSPHERE WEATHER EVENTS FREEZE/FROST EARTH SCIENCE ATMOSPHERE ATMOSPHERIC TEMPERATURE SURFACE TEMPERATURE EARTH SCIENCE ATMOSPHERE ATMOSPHERIC TEMPERATURE SURFACE TEMPERATURE EARTH SCIENCE ATMOSPHERE ATMOSPHERIC WATER VAPOR WATER VAPOR EARTH SCIENCE ATMOSPHERE CLOUDS CLOUD PROPERTIES EARTH SCIENCE ATMOSPHERE PRECIPITATION PRECIPITATION AMOUNT GLOBAL CLIMATE GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=551 VIEW RELATED INFORMATION https://daac.ornl.gov//CLIMATE/guides/eastanglia_1901_1995.html Global Monthly Climatology for the Twentieth Century (New et al.) USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0