Leslie Holdridge

Infobox Scientist
name = Leslie Rensselaer Holdridge
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birth_date = September 29, 1907
birth_place = Ledyard, Connecticut
death_date = June 19, 1999
death_place = Easton, Maryland
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citizenship = USA
nationality = USA
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work_institutions = Institute Tecnologico de Costa Rica
alma_mater = H. B.S. in Forestry, University of Maine, 1931, postgrad., 1931-32; M.S. in Ecology, University of Michigan, 1946, Ph.D., 1947.
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religion = Congregationalist
footnotes = Professor Leslie Ransselaer Holdridge (1907 to 1999) was an American botanist and climatologist. He was the son of Samuel Eneas Holdridge and Phebe J. Holmes.

Overview

In his famous 1947 paper, he defined "life zones" using three indicators:

# Mean annual biotemperature (average temperature, after data values below 0°C or above 30°C have been eliminated)
# Total annual precipitation
# The ratio of mean annual potential evapotranspiration to mean total annual precipitation.

See also

*Climate classification

References

* Holdridge, L.R. (1947) Determination of world plant formations from simple climatic data. Science, 105, 367--368.

Persondata
NAME=Holdridge, Leslie
ALTERNATIVE NAMES=
SHORT DESCRIPTION=American botanist and climatologist
DATE OF BIRTH=September 29, 1907
PLACE OF BIRTH=Ledyard, Connecticut, USA
DATE OF DEATH=June 19, 1999
PLACE OF DEATH=Easton, Maryland, USA