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• CN 62-1072/P
• ISSN 1000-0240
• 创刊于1979年
• 主管单位：中国科学院
• 主办单位：中国科学院寒区旱区
•                  环境与工程研究所
•                  中国地理学会

• 研究论文 •

高海拔多年冻土分布的地带性数学模式之探讨

1. 中国科学院兰州冰川冻土研究所
• 收稿日期:1982-07-23 出版日期:1984-08-25 发布日期:2012-04-26

Approach to the Mathematical Model of Zonality of High-Altitude Permafrost

Cheng Guodong, Wu Bangjun

1. Lanzhou Institute of Glaciology and Cryopedology, Academia Sinica
• Received:1982-07-23 Online:1984-08-25 Published:2012-04-26

Abstract: The changing trends of timberline, snow line, boundary line of mountain cold desert soil and permafrost lower limit with latitude are quite similar. By using the method of curve-fitting,the empirical relationship between lower limit of high-altitude permafrost(H) and latitude (φ) has been obtained.H = 3650 exp[-0.003(φ-25.37)2] + 1428. Tentatively applied, the results are satisfactory.This function has an extreme value and an inflection point, which is different from those mathematical models obtained before. As indicated by this function, starting from equator, the permafrost lower limit rises with increase of latitude, and reaches its extreme value of 5078 m a.s.l. at the latitude of 25°22’N, then it descends with increase of latitude; at the initial stage, the descending slope is steep, and reaches its maximum at the latitude of 38°N, then becomes gentle with increase of latitude. These features of the function are closely related to the features of mean latitudinal distribution of earth’s radiation budget.