近50年呼和浩特市植物气候生产力与气候变化特征

利用呼和浩特市近50年年平均气温及年降水量资料,应用Thornth waite Memorial模型,计算植物气候生产力(TSPV)对年均气温和降水量变化的响应情况,评估该地区植物气候生产力的年代际变化及未来气候变化情景下变化趋势。结果表明,近50年该区增温率为0.35℃/10a,降水呈弱减趋势,减少率为2.91 mm/10a;近50年呼和浩特市TSPV变化缓慢,表现为不显著的增加趋势;"冷湿型"、"暖干型"气候类型均出现TSPV正负距平现象,说明气温和降水不是该地区植物气候生产力变化的唯一限制因子;TSPV增减与年平均气温和降水变化同步,其中降水变化对TSPV的影响大于气温变化的影响。

Change Characteristics of Phytoclimate Productivity and Climate in Hohhot in Nearly 50 Years

According to the annual average temperature and precipitation data in Hohhot in nearly 50 years,the response of phytoclimate productivity to the change of annual climate and precipitation was measured with the Thornth waite Memorial model,the interannual and interdecadal change as well as the future climate change of the phytoclimate productivity were evaluated.As indicated by the results,the temperature increased at a rate of 0.35 ℃ /10a,while the precipitation decreased at a rate of 2.91 mm/10a;the phytoclimate productivity presented a slow increasing trend in Hohhot during the 50 years;the TSPV of "cold-wet" and "warm-dry" climate all showed positive and negative anomaly phenomenon,indicating that the temperature and precipitation were not the only limit factors to Hohhot TSPV change;the TSPV increase and decrease were synchronized with the temperature and precipitation change,and the precipitation produced larger influence on TSPV than the temperature.