122
Chapter 13
the model has been prescribed using a land use and land cover data, which
include the intensity of agriculture.
3. RESULTS AND DISCUSSION
Zonal average (5° latitude bands) values of annual evaporation (19871988 average) are shown in Fig. 2 (a, b), and compared with previous
estimates. Although the pattern of zonal variation agree well with the
previous calculations, our values are generally closer to Budyko than
Baumgartner and Reichel, Mintz and Walker or Henning. For latitudes
around the equator, our evaporation values are higher than those of Budyko
and Henning by about 100 mm, but lower than those of Baumgartner and
Reichel and Mintz and Walker by about 50 and 100 mm, respectively. Both
Henning and Baumgartner and Reichel show minimum evaporation in the
latitude band 45°-50°S, which does not appear in our calculations, although
a weak minimum appears in the latitude band 50°-55°S. Evaporation values
of Mintz and Walker are 150-200 mm higher than ours for the latitude band
45°-55°S, although the difference is less than 20 mm for the latitude band
35°-40°S. Henning, and Mintz and Walker show a small peak in the latitude
band 30°-35°N, while Baumgartner and Reichel show a similar peak in the
latitude band 35°-40°N. Such peaks do not appear in our calculations.
Chapter 13
the model has been prescribed using a land use and land cover data, which
include the intensity of agriculture.
3. RESULTS AND DISCUSSION
Zonal average (5° latitude bands) values of annual evaporation (19871988 average) are shown in Fig. 2 (a, b), and compared with previous
estimates. Although the pattern of zonal variation agree well with the
previous calculations, our values are generally closer to Budyko than
Baumgartner and Reichel, Mintz and Walker or Henning. For latitudes
around the equator, our evaporation values are higher than those of Budyko
and Henning by about 100 mm, but lower than those of Baumgartner and
Reichel and Mintz and Walker by about 50 and 100 mm, respectively. Both
Henning and Baumgartner and Reichel show minimum evaporation in the
latitude band 45°-50°S, which does not appear in our calculations, although
a weak minimum appears in the latitude band 50°-55°S. Evaporation values
of Mintz and Walker are 150-200 mm higher than ours for the latitude band
45°-55°S, although the difference is less than 20 mm for the latitude band
35°-40°S. Henning, and Mintz and Walker show a small peak in the latitude
band 30°-35°N, while Baumgartner and Reichel show a similar peak in the
latitude band 35°-40°N. Such peaks do not appear in our calculations.