A PRELIMINARY STUDY ON THE IMPACT OF MESOSCALE IRRIGATION OVER ARID LAND ON MESOSCALE CLIMATE

The present study investigated the modification of mesoscale inhomogeneous distribu-tion of soil wetness, resulting from mesoscale irrigation over arid or semiarid lands in mid-latitude in the later summer or early autumn, on mesoscale climate under conditions withand without synoptic flow influence, using an interactive model between soil and atmo-sphere. The simulations indicated that after a mesoscale irrgation, a wet soil breeze circu-lation was thermally forced, which was, in many features, similar to that of the sea breezecirculation. The influence of synoptic flows on the structure of thermally--induced wet soilbreeze circulation was also discussed.     

干旱地区大面积灌溉中尺度气候效应的初步研究

本文使用土壤-大气相互作用的中尺度模式研究在干旱的中纬度地区大面积灌溉对中尺度气候的调整。研究表明,在干旱地区大面积灌溉可导致由于热力强迫作用产生一个在性质上非常类似于海风环流的潮湿土壤风环流。在该环流的作用下,使该地区从干旱气候向类似于沿海气候的方向调整。文中还讨论了地转风对这个中尺度环流的影响。     

一个新的流泄风参数化公式及验证

本文推导了一个新的由热力强迫的流泄风参数化公式。该公式用数值模拟计算结果和场地实验观测结果作了验证。这些验证结果表明,该参数化公式能再现流泄风的结构。     

A New Parameterization Formulation of Drainage Flows and Evaluation

A new parameterization formulation of thermally forced drainage flow was derived in the present study. The parameterization was tested with both the numerical model simulation results and the observational data available from recent papers. The verification indicated that the parameterization formulation can quite well reproduce the structure of drainage flow.