摘要
中亚地区植被对保障区域生态安全和"新丝绸之路经济带"建设具有重要作用,然而气候如何影响植被在中亚地区的生长模式尚不清楚。基于2000—2017年中亚地区遥感植被指数,结合气象、地形和中亚人口数据,研究了近18年中亚地区植被的时空分布规律和变化趋势,确定了植被变化与不同因子的相关性并大致预测植被未来长势。结果表明,2000—2017年中亚地区整体植被呈降低趋势,主要分布在中部和西南部且植被沿山脉分布,西坡比东坡植被长势旺盛。2010年整体植被由退化趋势转变成改善趋势。降水和温度对植被生长均有促进作用,但植被对降水的响应比温度的更敏感。未来中亚地区植被整体上呈现改善的趋势。此外,不同地理分区,人类活动对植被也有一定程度影响。
Vegetation in Central Asia plays an important role in the protection of regional ecological security and the construction of"The Silk Road Economic Belt". However, the influence of climate on vegetation growth mode in Central Asia is still not clear. Based on the index of NDVI combined with meteorology, terrain and population data, we studied the time-space distribution rule and change trend of the vegetation in Central Asia for nearly 18 years and confirmed the correlation between the vegetation change and different influencing factors, and predicted roughly the future growth trend of the vegetation. The results showed that the whole vegetation in Central Asia between 2000 and 2017 presented a decreasing trend, mainly distributed in the middle area and south-western area and along the mountains. The vegetation in west slope was stronger than that in east slope. In 2010, the vegetation was changed from degradation trend to improving trend as a whole.The precipitation and temperature had a promotion role for the vegetation growth, but vegetation was more sensitive to precipitation than to temperature. In the future, the vegetation in Central Asia will show an improving trend on the whole. In addition, different geographical demarcation and human activities will have certain influence on vegetation.
作者
郭岩
何毅
张立峰
邱丽莎
张国强
张志华
Guo Yan;He Yi;Zhang Lifeng;Qiu Lisha;Zhang Guoqiang;Zhang Zhihua(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070;National-local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070)
出处
《中国农学通报》
2021年第8期123-131,共9页
Chinese Agricultural Science Bulletin
基金
兰州交通大学青年基金“基于GIS和RS的祁连山冰川和植被变化研究”(2017002)
兰州交通大学‘天佑青年托举人才计划’基金资助
兰州交通大学优秀平台
甘肃省教育厅“兰州市主城区地面沉降InSAR监测”(2019A-043)
中国博士后科学基金“天山小流域尺度冰川——冰湖协同演变定量关系”(2019M660092XB)。
