地理科学 ›› 1983, Vol. 3 ›› Issue (2): 95-102.doi: 10.13249/j.cnki.sgs.1983.02.95

• 论文 •    下一篇

中国不同植被类型水热条件的数值辨识

刘多森, 蔡蔚祺   

  1. 中国科学院南京土壤研究所
  • 出版日期:1983-03-20 发布日期:1983-03-20

ON THE NUMERICAL IDENTIFICATION OF HYDROTHERMAL CONDITION FOR DIFFERENT TYPES OF VEGETATION IN CHINA

Liu Duosen, Cai Weiqi   

  1. Institute of Soil Science, Academia Sinica, Nanjing
  • Online:1983-03-20 Published:1983-03-20

摘要: 气候、地貌、土壤等环境条件对中国植被分布的影响,已有深入论述。气候、地貌是决定地域水热条件的重要因素,而土壤形成过程及土壤类型又受地域水热条件所左右。因此,气候、地貌影响植被分布的信息,与土壤影响植被分布的信息,大部分是重叠的。综合研究植被分布与水热条件的关系,本质上在于阐明气候、地貌对植被分布的影响,当然部分地包含了土壤的影响。

Abstract: In order to identify hydrothermal Condition for distribution of vegetation,nine indices were taken from 586 meteorological stations in China,i.e.temperature effect of Chemical reactions in nature (T),mean air temperature in thecoldest tenday period (t1),number of days with daily mean air temperature≥10℃(Dt),moisture effect (M),effect of saturated water vapour pressure (V),relative humidity (f),numbcr of days with daily precipitation≥10mm (Dp),altitude(A),and latitude (L).The 586×9 original data mentioned above were treated by the method of principal component analysis.No correlation is found among different principalComponents,each component reflecting a different and independent factor.Fromeigenvectors of the first two principal components,it will be seen that the firstprincipal component reflects thermal intensity in a region,and the second reflects moisture intensity in a region.Cumulative variance of first and second principal components to 84.6%.From principal component analysis,we have obtained sets of points of firstand second principal components for 13 vegetation types of China.It is betterto use these polntsets to identify hydrothcrmal condition of different typesof vegetation in China.These vegetation types are:1.savanna,2.tropical bush,3.warm evergreen and deciduous bush,4.warm forest,5.warm deciduousbush,6.temperate dry deciduous bush,7.temperatemoist deciduous bush,8.temperate forest,9.desert,10.desert steppe,11.steppe,12.alpine steppe,and13.alpine meadow.