Bulk transfer coefficient over a snow surface |
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| Authors: | Junsei Kondo Hiromi Yamazawa |
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| Institution: | (1) Geophysical Institute, Tohoku University, Sendai, Japan |
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| Abstract: | The drag coefficient C
D
and the bulk transfer coefficient for sensible heat C
H
over a flat snow surface were determined experimentally. Theoretical considerations reveal that C
D
depends on the friction velocity u
* as well as on the geometrical roughness h of the snow surface. It is found that C
D
increases with increasing u
* and/or h. The dependency of C
H
on u
* and h is so small that it is possible to consider C
H
as a constant for practical purposes: C
H, 1
= 2.0 × 10–3 for a reference height of 1 m. The bulk transfer coefficient for water vapor is estimated at C
E, 1
= 2.1 × 10–3 for a reference height of 1 m. |
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| Keywords: | |
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