基于气候区划的中国建成区绿地率区域差异研究

气候是影响城市绿地的基础性自然因素，定量研究气候对建成区绿地率的影响，利于合理调控城市绿地建设。以中国县级市及以上城市为样本，综合运用标准差、变异系数和锡尔系数等方法，探究1996—2015年不同气候区划建成区绿地率区域差异状况。结果表明：1)从发展水平看，不同气候区划具显著差异，热带高于温带，湿润、半湿润区高于半干旱、干旱区，其中，热带与湿润区、半湿润区城市重合度高，是气候优势区位；2)从差异度看，不同气候区划差异度具明显区别，温带差异度高于热带，干旱、半干旱区高于湿润、半湿润区；3)从差异分解看，温度带间建成区绿地率不平衡对全国总差异的影响度大于干湿区间，温度带间差异是我国总体差异的主要原因。以期为揭示气候对城市绿地建设水平的影响作用提供理论依据。

Study on the Regional Difference in Green Space Rate of Built District in China Based on Climate Division

Climate is the basic natural factor that affects urban green space. Quantitatively studying the influence of climate on the green space rate of built district. Is conducive to the reasonable regulation and control of urban green space. Taking the county-level cities in China and above cities as samples, this article utilized standard deviation and coefficient of variation, and Syr-Coefficient to explore the regional differences in the green rates of the built-up areas with different climatic zoning from 1996 to 2015. The results showed that: 1) From the perspective of the level of development, there are significant differences among different climatic zones. The tropical zone is higher than that in the temperate zone, while the humid and semi-humid zones are higher than in the semi-arid and arid zones.Among them, the tropical and wet areas as well as the semi-humid areas of the city are highly coincidental, and they have the dominant location. 2) In the aspect of the degree of difference, the difference of different climate zoning is obviously different. The difference of temperate zone is higher than that in tropical, arid and semi-arid areas. 3) From the perspective of difference decomposition, the influence of Unbalanced green space rate of built district. In urban temperature region on the overall national differences is greater than that on wet and dry regions. The difference between temperature bands is the main reason for the overall difference in China. This article is to reveal the role of climate on the impact of urban green space to provide a theoretical basis.