首页|祁连山国家公园酒泉片区生长季植被覆盖的时空变化及其与气候因子的相关性研究

祁连山国家公园酒泉片区生长季植被覆盖的时空变化及其与气候因子的相关性研究

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基于空间分辨率为30 m的Landsat5 TM影像、Landsat7 ETM+影像和Landsat8 OLI影像,通过对影像逐像元信息的提取和分析,结合相应的气象资料,运用均值法、斜率分析法、最小二乘法和相关性分析法,研究了2006-2021年祁连山国家公园酒泉片区生长季植被覆盖的时空变化及其与气候因子的相关性.结果表明:(1)气温和降水量等气候因子主导了祁连山国家公园酒泉片区植被生长季的归一化植被指数(Normalized Difference Vegetation Index,NDVI)变化趋势;(2)在长时间序列上,2006-2021年祁连山国家公园酒泉片区植被生长季的NDVI年际变化总体上以0.19%/a的速率增加,其空间特征为南北两侧显著增加、中部轻度增加、其他地区基本不变;(3)在短时间序列上2006-2011年和2016-2021年祁连山国家公园酒泉片区植被生长季NDVI年际变化呈减少趋势,而2011-2016年NDVI年际变化呈增加趋势.
Temporal and Spatial Changes of Vegetation during the Growing Season and Its Correlation with Climate Factors in Jiuquan Area of Qilian Mountain National Park
Based on the extraction and analysis of image-by-pixel information of satellite remote sensing image data including Landsat 5TM images,Landsat 7 ETM+images,and Landsat8 OLI images with a spatial resolution of 30 meters,combining with corresponding meteorological data,the temporal and spatial changes of vegetation during the growing season in Jiuquan area of Qilian Mountain National Park from 2006 to 2021 were studied by means of mean value,slope analysis,least square method and correlation analysis studied by means of mean value,slope analysis,least square method and correla-tion analysis.The results showed that:(1)Climate factors such as temperature and precipitation domi-nated the normalized difference vegetation index(NDVI)variation trend during the vegetation growth season in the Jiuquan area of Qilian Mountain National Park;(2)On a long-term series,the annual var-iation of NDVI during the vegetation growth season in the Jiuquan area of Qilian Mountain National Park from 2006 to 2021 generally increased at a rate of 0.19%/a,with spatial characteristics of signifi-cant increase on the north and south sides,slight increase in the middle,and basically unchanged in other areas;(3)On a short time series,the annual variation of NDVI during the vegetation growth sea-son in the Jiuquan area of Qilian Mountain National Park showed a decreasing trend from 2006 to 2011 and from 2016 to 2021,while the annual variation of NDVI showed an increasing trend from 2011 to 2016.

Qilian mountain national parkJiuquan areaVegetationTemporal and spatial changesND-VIClimatic factors

宋智军、董众祥、色拥军、张帆、卢书祥

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宁夏天昱科技有限公司,宁夏银川 750000

甘肃盐池湾国家级自然保护区管护中心,甘肃酒泉 736300

祁连山国家公园 酒泉片区 植被覆盖 时空变化 NDVI 气候因子

祁连山国家公园酒泉分局生态监测科技专项资助项目

XDA2006700

2024

云南师范大学学报(自然科学版)
云南师范大学

云南师范大学学报(自然科学版)

CSTPCD
影响因子:0.54
ISSN:1007-9793
年,卷(期):2024.44(5)