Updated scheme for eco-geographical regionalization in China
With the increasing global warming over the past three decades,the climatic zones and eco-geographical regions characteristics in China have changed.This study used the climatic data of 641 meteorological stations over the past three decades(1991-2020),as well as the high-precision data of eco-geographical elements to optimize the eco-geographical regions in China.The study updated the map of eco-geographical regionalization in China(2023)and increased the scale to 1∶4000000.The new map divided China into 11 temperature zones,22 dry and wet regions,and 50 natural regions.The results show that compared with eco-geographical regionalization in 2007,the overall pattern of eco-geographical regions in China has not changed significantly over the past three decades,but the boundaries of temperature zones,dry and wet regions,and eco-geographical regions(natural regions)in some areas have changed to some extent.Firstly,the boundary change of temperature zones is more obvious in the east.Particularly,in the middle and lower reaches of the Yangtze River,the northward shift of the temperature zone boundary between the northern subtropical and the mid-subtropical zones is obvious.Secondly,the boundary between dry and wet regions has changed,and that between semi-arid and arid regions in the north of the second-order landform step has shifted slightly to the west.In addition,the boundary between semi-arid and sub-humid regions in the Qinghai-Tibet Plateau has shifted slightly to the southeast,reflecting a slight expansion of the scope of semi-arid regions.Finally,boundary changes in natural regions in some areas vary greatly.This study can provide a macro-regional framework for guiding ecological conservation and restoration in different regions.
climate changeeco-geographical regionalizationshift of boundaryChina
万方数据
维普
