[目的]分析2008年湖南低温雨雪冰冻灾害的成因.[方法]基于基本气象观测资料,对2008年初发生在湖南的一次强低温雨雪冰冻天气进行了初步分析,探讨致灾因子、地形及人类活动在此次低温雨雪冰冻巨大灾害形成中的作用.[结果]2008年初低温雨雪冰冻天气造成湖南巨大灾害的原因是:致灾因子强度为历史罕见(较1954年还强);地形影响加剧了灾害发展;人类活动对灾害起着放大作用.此外,提出了通过提高极端天气的预测预警能力、加强气候可性行论证、加大自然灾害防御宣传力度等措施来减轻极端天气事件的影响程度.[结论]该研究为低温雨雪冰冻灾害天气的预测预报提供理论依据.%[Objective] The aim was to analyze the causes of low-temperature rain and snow disasters in 2008. [Method] Based on the basic meteorological observation data, a primary study was implemented about the severe cold air and frozen rain event. The importance of factors causing disaster, territory and human activity in the formation of low-temperature rain and snow disasters were expounded. [ Result] The factors triggering the disasters were so strong that were rarely seen in previous ( stronger than that in 1954 ) ; the specific terrain was beneficial to the occurrence of the frozen rain; the human being' s action amplified the impacts of disaster events while suffering it. Furthermore, a point of view to minimize the climate disaster damage like this severe frozen rain was proposed. Improvement of forecast capability and accuracy, implementation of the demonstration about climatic feasibility, and propagation to public about the natural disaster's protection and mitigation and so on were functional aspects. [ Conclusion] The study provided theoretical basis for the prediction and forecast of low-temperature rain and snow disasters.
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