沿海防护林体系海陆风环流的近地面层风温湿廊线特征

THE CHARACTERISTICS OF WIND SPEED,TEMPERATURE AND HUMIDITY PROFILE IN THEATMOSPHERE SURFACE LAYER ABOVE PROTECTIVEPLANTATION SYSTEM ALONG THE COASTUNDER THE SEA AND LAND BREEZE CIRCULATION

利用系留气球观测系统观测了沿海防护林体系海陆风环流时近地面的风、温、湿廊线特征，有如下结论：（１）海防林体系海陆风廓线均呈单峰形，但海风的厚度比陆风大；（２）海防林体系对近地面层的海陆风有较明显的减弱作用，但对陆风的影响高度比对海风的影响高，在林带高度附近风速降低最多，１～１．５Ｈ可降低５０％～６０％，１．５～５Ｈ可降低２０％～３０％，（３）对近地面层有一定的增温增湿作用，防风环流时１ｍ高度可增温约１℃，增加比温１．０ｇ／ｋｇ。

According to the analysis by the tethered baloon observation data, the charcatetistics of windspeed, temperature and Humidity profile in the atmosphere surface layer above the protective plantation system along the coast under the sea and land breeze circulation are as follows: (1) the sea and land breeze prfiles' forms are similar, but the sea breeze is deeper than the land breeze ; (2) the windbreak network reducesthe windspeed near surfece obviously, decreases 50%￣60% and 20% ￣ 30 % at 1 ￣ 1. 5H and 1. 5￣ 5H respectively, and the land breeze is reduced more deeply than the sea breeze ; (3) the windbreak increases thetemperature about 1 ℃ and the specific humidity about 1g/kg under the land breeze circultion.