摘要
本文以和田河中上游地区为研究对象,基于MOD17A3数据集、气象数据并结合一元线性回归分析、变异系数、Hurst指数、相关性分析等方法,研究了2000—2020年和田河中上游植被净初级生产力时空变化特征及其与气候因子的关系。结论如下:1)2000—2020年和田河中上游NPP总体呈波动上升趋势,2010年NPP值最大,其值为156.09 gCm^(-2)a^(-1);2)2000—2020年和田河中上游NPP空间上呈北高南低的特征,NPP平均值为136.50 gCm^(-2)a^(-1),最大值为505.26 gCm^(-2)a^(-1),且出现在皮山县境内;3)NPP波动较大且NPP值分布较为离散,变异系数平均值为0.48,最大值为3.06,变异系数大于0.3的区域占比达63.00%,NPP未来变化以持续性特征为主,Hurst指数平均值为0.77,呈持续性特征的区域占比达98.02%;4)NPP和降水呈正相关,与气温的相关性不明显。
Based on MOD17A3 dataset, meteorological data combined with one-dimensional linear regression analysis, coefficient of variation, Hurst index and correlation analysis, this paper explores the spatial and temporal characteristics of vegetation net primary productivity(NPP) and its relationship with climate factors in the middle and upper reaches of Hotan River from 2000 to 2020. The results are as follows:1) NPP in the middle and upper reaches of Hotan River showed an overall fluctuating upward trend from 2000to 2020, and the largest NPP value was 156.09 gCm^(-2)a^(-1)in 2010. 2) NPP in the middle and upper reaches of Hotan River showed a spatially north high-south low pattern from 2000 to 2020, and the mean value of NPP is 136.50 g Cm^(-2)a^(-1)and the maximum value is 505.26 g Cm^(-2)a^(-1)in Pishan County. 3) The mean value of coefficient of variation is 0.48 and the maximum value is 3.06;the area with coefficient of variation greater than 0.3 accounts for 63.00%;the mean value of Hurst index obtained from the simulation of future change trend is 0.77;the area with persistent characteristics accounts for 98.02%. 4) NPP and precipitation are positively correlated, and the correlation with temperature is not obvious.
作者
陈丽梅
阿布都热合曼·哈力克
CHEN Limei;ABUDUREHEMAN·Halike(College of Geographical Science&Xinjiang Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi,Xinjiang 830017,China)
出处
《湖南城市学院学报（自然科学版）》
CAS
2022年第3期59-66,共8页
Journal of Hunan City University:Natural Science
基金
国家自然科学基金项目(42161049,41761019,41061052)
西部地区人才培养特别项目(201408655089)。
关键词
植被净初级生产力
时空变化
气候因子
和田河中上游
net primary productivity
spatial and temporal variation
climate factors
middle and upper reaches of Hotan River
