globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6238580
论文题名:
青藏高原植被覆盖时空变化及其对气候因子的响应
其他题名: Spatio-temporal variation of vegetation coverage over the Tibetan Plateau and its responses to climatic factors
作者: 卓嘎1; 陈思蓉2; 周兵3
刊名: 生态学报
ISSN: 1000-0933
出版年: 2018
卷: 38, 期:9, 页码:654-661
语种: 中文
中文关键词: 归一化植被指数 ; 青藏高原 ; 时空特征 ; 气候变化
英文关键词: normalized difference vegetation index ; the Tibetan Plateau ; spatio-temporal distribution ; climate change
WOS学科分类: PLANT SCIENCES
WOS研究方向: Plant Sciences
中文摘要: 研究青藏高原植被覆盖时空分布特征对加深气候变化的认识及生态环境保护具有重要的生态价值和现实意义。利用20002016年MODIS NDVI 1km/月分辨率数据以及气象观测数据,采用最大合成法、趋势性分析以及相关分析方法,探讨了不同时间尺度青藏高原地区NDVI的分布特征及其与降水、气温的关系。结果表明: ( 1)青藏高原东南部植被状况明显好于西北部,植被覆盖的分布格局与区域水热条件的时空分布保持了较好的一致性;近17年来青藏高原植被覆盖改善的地区要比退化的地区面积大,严重退化的区域主要位于青藏高原西南部;青藏高原NDVI值在20002016年呈幅度较小的增加趋势。( 2)除夏季降水量外,研究时段内其他季节降水量均呈增加趋势;气温均呈增加趋势,尤其以春季增加最为显著,整体上青藏高原气候呈现暖湿化趋势。总体上年降水量与年最大合成NDVI呈较好的正相关;年平均气温与年最大合成NDVI在高原东南部呈正相关,西南部呈负相关。降水量和热量条件均是高原植被生长的影响因素,降水与植被覆盖的影响较气温密切。
英文摘要: The study of the spatio-temporal distribution of vegetation over the Tibetan Plateau has an important ecological value and practical significance for increased understanding of climate change and ecological environmental protection. Using the monthly normalized difference vegetation index( NDVI) with 1km resolution,determined using the moderate-resolution imaging spectrometer ( MODIS),from 2000 to 2016,and meteorological observations,this study analyzed the distribution of the NDVI over different time scales and its relationship with precipitation and temperature over the Tibetan Plateau based on maximum value composites ( MVC),linear trends,and correlation analysis method. The results showed that: 1) Vegetation status in the southeastern part of the plateau was healthy than that in the northwest. The distribution pattern of the vegetation was consistent with the spatio-temporal distribution of the regional hydrothermal condition. The coverage area of improved vegetation was larger than the areas with degraded vegetation over the past 17 years,and serious degradation areas were mainly situated in the southwestern part of the plateau. The NDVI exhibited an increasing variation tendency with small amplitudes from 2000 to 2016 over the Tibetan Plateau. 2) Seasonal precipitation showed an increasing tendency during the study period except in summer,while seasonal temperature presented an increasing trend,with the temperature in spring increasing at the highest rate. Generally,climate change exhibited awarm and humidvariation trend over the plateau. Annual precipitation was positively correlated with the annual maximum NDVI. Mean annual temperature was positively correlated with the NDVI in the southeastern plateau,and showed an inverse relationship with the NDVI in the southwestern part. Both precipitation and heat conditions affected vegetation growth,and the effect of precipitation on the vegetation was more significant than that of temperature.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/154673
Appears in Collections:气候变化事实与影响

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作者单位: 1.中国气象局成都高原气象研究所拉萨分部
2.西藏自治区气候中心,
3., 拉萨
4.拉萨,
5.850000
6.850000
7.广西省气候中心, 南宁, 广西 530000, 中国
8.中国气象局国家气候中心, 北京 100081, 中国

Recommended Citation:
卓嘎,陈思蓉,周兵. 青藏高原植被覆盖时空变化及其对气候因子的响应[J]. 生态学报,2018-01-01,38(9):654-661
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