State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, 1-A Fuxing Road, Haidian District, Beijing 100038, China.
Department of Water Resources, China Institute of Water Resources and Hydropower Research, A-922, 1 Yuyuantan South Road, Haidian District, Beijing 100038, China.
Int J Environ Res Public Health. 2018 Oct 16;15(10):2271. doi: 10.3390/ijerph15102271.
Analysis of the suitability of hydrothermal conditions for vegetation growth would benefit the ecological barrier construction, water resources protection and climate change adaptation. The suitability of hydrothermal conditions in Naqu Prefecture was studied based on the spatial displacement of 500 mm precipitation and 2000 °C accumulated temperature contours. Results showed that the 500 mm precipitation contour had a shifting trend toward the southwest, with a 3.3-year and 7.1-year period, respectively, in the longitudinal and latitudinal direction, and the longitude changed suddenly around 1996. The 2000 °C accumulated temperature contour had a shifting trend toward the northwest, with a 1.8-year period and a 7-year sub-period in the longitudinal direction; the longitude had a catastrophe point between 1966 and 1967, while the latitude had a catastrophe point between 2005 and 2006. When located in the same vegetation zone, the annual precipitation in Naqu Prefecture was higher than the national average, while the accumulated temperature was lower than the national average, indicating that areas with suitable hydrothermal conditions suitable for vegetation growth showed a northwestward shift tendency. This research would help to support some recommendations for plants' ecological system protection in alpine areas, and also provide guidelines for climate change adaptation.
分析水热条件对植被生长的适宜性将有助于生态屏障建设、水资源保护和气候变化适应。本研究基于 500mm 降水和 2000°C 积温等间距面空间位移，对那曲地区的水热条件适宜性进行了分析。结果表明，500mm 降水等间距面具有向西南方向移动的趋势，在经、纬度方向上分别存在 3.3 年和 7.1 年的周期，1996 年左右经度方向上发生了突变；2000°C 积温等间距面具有向西北方向移动的趋势，在经度方向上存在 1.8 年和 7 年的次周期，经度方向上存在 1966-1967 年的突变点，纬度方向上存在 2005-2006 年的突变点。在同一植被带内，那曲地区年降水量高于全国平均水平，积温低于全国平均水平，表明水热条件适宜植被生长的地区具有向西北方向移动的趋势。本研究结果可为高寒地区植物生态系统保护提供一些建议，也可为气候变化适应提供指导。
