大気接地層中の運動量の乱流輸送量の鉛直輸送過程について

Abstract

The turbulent transfer process of the vertical momentum flux in the atmospheric surface layeris investigated. The transfer process of large vertical momentum flux is associated with the phe-nomena which are not considered as the random fluctuation. The quadrant analysis of windvelocity fluctuation shows that the contribution of vertical momentum flux from the forth quad-rant (u>0, w<0) is lager than that from the second quadrant (u<0, w>0). The intermittenttransfer is evaluated by the conditional sampling method. The vertical momentum flux is trans-ferred efficiently in the case of the maxima of the streamwise wind velocity fluctuation.