秦岭南北生态地理界线对气候变化的响应

以吉良的热量指数(温暖指数WI和寒冷指数CI)和徐文铎的湿度指数HI为指标,以10a为尺度研究1961-2010年秦岭南北3条主要生态地理界线变化。在此基础上分析秦岭南北生态地理界线变化对气候变化的响应。结果表明:秦岭南北1961-2010年整体上纬向生态地理界线向高纬移动;经向生态地理界线受秦岭山脉东-西走向对季风所输送水汽的阻挡作用呈现南移,而非东西移动,但阶段性上表现波动性移动。秦岭南北生态地理区域界线从整体上位置、移动速度的变化和阶段性位置、移动速度的变化都很好响应气候变化。

Interdecadal changes of eco-geographical boundaries in Qinling Mountains

Hydrothermal changes caused by climate change are one of the important causes for eco-system change,whose long-term changes and short-term fluctuations are essential causes of formation,distribution and change of eco-geographical boundaries.In this paper,the changes of the three main eco-geographical boundaries were quantitatively studied based on the heat index(warmth index WI and coldness index CI) firstly developed by Kira and the humidity index HI put forward by Xu Wenduo for each 10 years of the north and south of Qinling in 1961-2010.The results indicated that zonal eco-geographical boundaries have been moving to higher latitude and meridional eco-graphical boundaries have been moving northward in the whole sequence,but the movements of stages were volatility.The changes of eco-geographical boundaries expressed in distribution and moving speed responded to climate change well,not only in the whole sequence but also in the stages.