西双版纳州低温寒害基本特征及减灾对策

根据西双版纳州热带经济作物生长指标划分西双版纳州低温寒害标准，并把出现严重低温寒害天气过程作为主要研究对象。通过对西双版纳州多站点面气象资料普查分析，发现当地受寒天气影响的区域差异性大，地面辐射降温强烈，且山地逆温现象突出，得出高空冷空气的不断补充和地面辐射冷却的共同作用是造成低温寒害的的主要原因，并提出了不同热带作物的防寒减灾对策。

Analysis of Chilling Injury Weather and the Disaster-Reducing Countermeasures in Xishuanbanna

The standard of chilling injury in Xishuanbanna in delimited according to the indexes of tropical crops, then regarded the cause of chilling injury weather as the main subject of study in this article. The surface meteorological data from many stations in Xishuanbanna were analyzed and found that there were great regional differences in chilling injury, strong dropping in temperature arising from terrestrial radiation and the prominent phenomenon of temperature inversion in hilly area when chilling injury weather influenced Xishuanbanna. By analyzing the background of upper air circulation, it is concluded initially that the path of cold air influencing Xishuanbanna is the return current to the east plus the joint affect of continuous supplement of the cold air and cooling surface arising from terrestrial radiation was the main contributing factor that caused chilling injury. Then disaster-reducing countermeasures for different tropical crops are also put forward.