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LocClim_1, a software cum database to estimate average "local climate" conditions at any location on land

Last modified November 15, 2003 00:46

Dear Collegues, Some of you are familiar with LocClim_1, a software cum database to estimate average "local climate" conditions at any location on land. If interested, you can find details under http://www.fao.org/sd/2002/EN1203a_en.htm.

Dear Collegues,
Some of you are familiar with LocClim_1, a software cum database to estimate average "local climate" conditions at any location on land. If interested, you can find details under http://www.fao.org/sd/2002/EN1203a_en.htm. We distributed about 1000 copies of LocClim_1 since last October and we will shortly receive the new version, which we call the "New_LocClim". A number of functionalities have been added, the details of which are not relevant at this stage. The New_LocCLim will be published in the very first months of 2004.
One of the main criticisms we received for LocClim_1 derives from the fact that we work mainly in developing countries, i.e. we did little efforts in the past to collect certain types of data from the developed world. As a result, we have very few Potential Evapotranspiration (PET) data for such places as the US and Canada.
If possible, we would like to fill this gap before we release the New_LocClim.
The purpose of this email is thus to ask colleagues if they know of easily accessible "average monthly 1961-90 station PET" for a number of areas mentioned at the bottom of this message. Of course, "average monthly 1961-90 station PET" has to be qualified:
- PET is ideally Penman-Monteith PET (details, if necessary, under http://www.fao.org/docrep/X0490E/X0490E00.htm), but if you have values obtained with other methods, we would still give them a look and do some comparisons with what we have;
- strictly, average monthly PET should be obtained by calculating monthly PET values year by year and then averaging them over the years 1961 to 1990. Alternatively, PET calculated with average 1961-90 values of Tx, Tn, moisture, radiation and wind speed would be acceptable to us;
- the reference period is ideally 1961-90, but we would use any "recent" and "long" series, "long" being 20+ years and "recent" being any time series that ends after 1980.
- station PET: we specifically exclude any data from global or local grids (Interpolated data and area-wide ones). We need real station data, with geographic coordinates and altitude.
If you have such data, or know of good sources, kindly let us know. Please not that the data will eventually be packed into a database and that the original data are NOT accessible through the New_LocClim. Of course, we will acknowledge in the New_LocClim CD-ROM the assistance received form any data contributors.
Needless to say, if you have the data used to compute "average monthly 1961-90 station PET", we would do so! Many thanks to everyone.

René GOMMES
Senior agrometeorologist
Environment and natural resources service
FAO of the UN, Rome

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