Representing twentieth-century space-time climate variability. Part 1: Development of a 1961--90 mean monthly terrestrial climatology

Journal Article · Mon Mar 01 04:00:00 EST 1999 · Journal of Climate

DOI:https://doi.org/10.1175/1520-0442(1999)012<0829:RTCSTC>2.0.CO;2· OSTI ID:332700

New, M; Hulme, M; Jones, P ^[1]

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1. Univ. of East Anglia, Norwich (United Kingdom)

The construction of a 0.5{degree} lat x 0.5 {degree} long surface climatology of global land areas, excluding Antarctica, is described. The climatology represents the period 1961--90 and comprises a suite of nine variables: precipitation, wet-day frequency, mean temperature, diurnal temperature range, vapor pressure, sunshine, cloud cover, ground frost frequency, and wind speed. The climate surfaces have been constructed from a new dataset of station 1961--90 climatological normals, numbering between 19,800 (precipitation) and 3,615 (wind speed). The station data were interpolated as a function of latitude, longitude, and elevation using thin-plate splines. The accuracy of the interpolations are assessed using cross validation and by comparison with other climatologies. This new climatology represents an advance over earlier published global terrestrial climatologies in that it is strictly constrained to the period 1961--90, describes an extended suite of surface climate variables, explicitly incorporates elevation as a predictor variable, and contains an evaluation of regional errors associated with this and other commonly used climatologies. The climatology is already being used by researchers in the areas of ecosystem modelling, climate model evaluation, and climate change impact assessment. The data are available from the Climatic Research Unit and images of all the monthly fields can be accessed via the World Wide Web.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 332700
• Journal Information: Journal of Climate, Journal Name: Journal of Climate Journal Issue: 3 Vol. 12; ISSN JLCLEL; ISSN 0894-8755
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AMBIENT TEMPERATURE
ATMOSPHERIC PRECIPITATIONS
CLIMATIC CHANGE
CLOUDS
MONTHLY VARIATIONS
WIND