GLOBAL CLIMATE DATABASE, MAY 15, 1996
Gazetteer: Identification Information
Originator: Global Change Department National Institute of Public Health and Environmental Protection
Title: Global Climate Database
Abstract: README for the updated global climate database, dd may 15, 1996
Reference to version 1.0 of this database:
Leemans, R., Cramer, W., 1991. The IIASA database for mean monthly values of temperature, precipitation and cloudiness on a global terrestrial grid. IIASA Research Report RR-91-18. International Institute of Applied Systems Analyses, Laxenburg. 61 pp. November 1991.
The documentation of the updated version is in preparation. The name of this updated version will be CLIMATE (Cramer & Leemans Interpolated Meteorology for Applications in Terrestrial Ecology).
The quality has been improved by using stringent station selection criteria for the climatic normal period 1931-1960. The database is now based on c. high-quality 16000-20000 stations world wide. The interpolation methodology has been improved by using a emperical correction scheme with locally derived lapse rates. This scheme works well for both temperature and precipiation.
The evapotranspiration scheme used is developed by Prentice et al. It reference is: Prentice, I.C., Sykes, M. Cramer, W., 1993. A simulation model for the transient effects of climate change on forest landscapes. Ecological Modelling, 65: 51-70.
Global GIS NOTE: Cloud
Coverage or Cloudiness is defined as the actual number of bright sunshine hours
over the potential number, and is thus expressed as a percentage figure. The
number in the database can be confusing. A low percentage means more sunshine
and fewer clouds. To look at this from the assigned colors in the legend the
darker-blue the values are the more sunshine and fewer clouds. Inserted by Trent
The files all contain:
Longitute (degrees (2 decimals), lower left corner of the 0.5 degree cells).
Latitude (degrees (2 decimals), lower left corner of the 0.5 degree cells).
Altitude (m asl)
12 monthly values (jan, feb.....nov, dec.)
tmp.shp mean temperature (C, 1 decimal)
prc.shp mean precipitation (mm, 0 decimal)
clo.shp mean sunshine or cloudines (%, 0 decimal)
pet.shp potential evapotranspiration (mm, 0 decimal)
aet.shp actual evapotranspiration (mm, 0 decimal)
Access Constraints: none
Use Constraints: It is ultimately the user's responsibility to assess the accuracy and completeness of a data set extracted from the database and to determine if these are sufficient for the purposes to which the data set would be applied.
Ordering Instructions: available online, see online linkage below
Contact Person: Rik Leemans
Contact Organization: National Institute of Public Health and Environmental Protection
Address: P.O.Box 12233
City: Research Triangle Park
State or Province: NC
Postal Code: 27709
Online Linkage: http://www.niehs.nih.gov
Entity and Attribute Information (table heading explanations)
Shape: ArcView file type (tmp.shp, prc.shp, aet.shp, clo.shp, pet.shp)