Research On Low-Temperature Risk Assessment for Spatial and Temporal Distribution in Northeast and South China

Low-temperature disasters seriously affect the ecological environment and people's daily lives. In the research, the spatial distribution of low-temperature risk over 30 years has been obtained by collecting meteorological and socio-economic data from 1991 to 2020, and then a risk assessment model based on hazard, exposure, and vulnerability indicators is built. The results show that the high-risk areas are mainly concentrated in the central, eastern, and southern parts of Northeast China, and the overall risk shows an increasing trend; the regions at high risk are primarily found in Hunan Province and the central part of Jiangxi Province in south China. Further, the change in risk is most obvious between 1991-2005, and the overall risk value decreased about 41.28%. The Contribution to low-temperature risk in Northeast China comes mainly from vulnerability. While, In South China, the contribution of various factors to risk is more evenly distributed.