Analysis of Climatic Characteristics of Lushan Rime and Construction of Tourism Meteorological Index

Zhang Kaimei; Wu Jianming; Wang Ruliang; Xie Keyong; Duan Yiping

doi:10.16765/j.cnki.1673-7148.2025.03.008

Abstract：Using daily rime and meteorological observation data from 1981 to 2020 in Lushan Scenic Area,the multi-scale climate change characteristics of rime in Lushan Mountain are statistically ana-lyzed.The correlation between rime and meteorological factors is analyzed and the rime landscape tourism meteorological index is established.Then,this index is verified by the rime observation data from Novem-ber 2022 to April 2023.The results are that:(1)The annual average number of rime days in Lushan Mountain is 37.2 d,with a maximum of 60 d in 1984.In 1999,it was the least,only 15 d.The overall annual rime days show a significant decreasing trend,with a distinct mutation point appearing in 1998.The number of rime days had a significant 2-4 year oscillation period in the late 1980s,and from late 1990s to the early 21st century,and a significant 12-14 year oscillation period from the mid-1990s to the early 21st century.(2)Lushan rime usually occurs from November to April of the following year,with the highest occurrence frequency in January and the lowest frequency in April.Winter is the main season for Lushan rime,accounting for more than 70％of the whole year.The first recorded date to see rime in Lus-han Mountain is November 8th,and the averaged initial date of Lushan rime is November 14th and the averaged latest date is April 16th.The averaged end day of Lushan rime is March 19th and the longest du-ration of rime is 39 days.The minimum temperature range for the occurrence of Lushan rime is-16.7 to 4.2 ℃,the relative humidity range is 8％to 100％,and the wind speed range is 0 to 24.4 m·s-1.(3)Adequate water vapor,temperature low enough,and relatively low wind speed are the key factors for the formation of the rime landscape.The average annual number of days for the rime landscape in Lushan Mountain is 16.3 d.In the past 40 years,the lowest temperature range for the rime landscape in Lushan Mountain has been-13.4 to-0.2℃,with an average temperature range of-9.7 to1.6 ℃,a relative humidity range of 40％to 100％,and a wind speed range of 0.3 to 12.3 m·s-1.Under such conditions,the probability of fog formation is almost 100％,and the probability of rainfall that occurs on the previous day is greater than that on the very day.(4)The established Rime Tourism Meteorological Index(RTMI)has been tested and can be applied to practical operations.It can be a guide for tourists to enjoy the rime landscape,and helps improve the quality of tourism meteorological services in Lushan Mountain.