Characteristics of atmospheric stability above an evergreen forest in central Cambodia
2008
Tamai, Koji | Nobuhiro, Tatsuhiko | Shimizu, Akira | Kabeya, Naoki | Chann, Sophal | Nang, Keth
Micrometeorological observations from a tower in a forest in central Cambodia were used to estimate forest water yields. For these estimates, the turbulent boundary layer was identified from tower observations of wind profiles. Indices including the stability length, friction velocity, and Richardson numbers were calculated to diagnose boundary layer characteristics. The calculated stability length indicated that the atmospheric condition was between weakly unstable and weakly stable 63% of the time. The calculated friction velocity exceeded 0·5 m s⁻¹ 77% of the time, and the calculated Richardson number was smaller than the critical number (0·2) 72% of the time. The indices calculated in this study indicate that the degree of atmospheric stability over this evergreen forest in central Cambodia is generally suitable for tower flux observations.
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