globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6309521
论文题名:
黄土高原昼夜不对称性增温及其对植被NDVI的影响
其他题名: Diurnal asymmetry of temperature and its effect on NDVI in Loess Plateau
作者: 马利群1; 秦奋1; 孙九林2; 王浩3; 夏浩铭1
刊名: 资源科学
ISSN: 1007-7588
出版年: 2018
卷: 40, 期:8, 页码:787-793
语种: 中文
中文关键词: 黄土高原 ; 生长季 ; 日最高气温 ; 夜最低气温 ; 不对称增温 ; 植被动态响应 ; 昼夜增温 ; 气候变暖
英文关键词: NDVI ; Loess Plateau ; growing season ; maximum temperature ; minimum temperature ; asymmetric warming ; NDVI ; vegetation dynamics ; day and nighttime warming ; global warming
WOS学科分类: PLANT SCIENCES
WOS研究方向: Plant Sciences
中文摘要: 本文选取19822015年黄土高原及周边地区102个气象站点的气象观测资料,结合归一化植被指数(NDVI)和植被类型数据,采用Mann-Kendall(M-K)非参数检验法和二阶偏相关分析法,分析了黄土高原植被生长季日最高气温(T_(max))和夜间最低气温(T_(min))的时间序列变化趋势和空间格局、并分植被类型探讨昼夜不对称性增温对植被的影响。研究表明:①19822015年间黄土高原植被生长季T_(max)及T_(min)都存在极为显著的上升趋势(P<0.01),植被生长季T_(min)的增温速率约为T_(max)增温速率的1.6倍,昼夜增温呈不对称性;②昼夜不对称性增温对植被动态的影响呈现明显的分异特征,植被生长季植被NDVI与T_(min)表现出比T_(max)更显著的相关性,即相对于白天增温,夜间增温的变化对黄土高原植被的影响程度更加显著;③不同植被类型的NDVI与昼夜增温的偏相关分析可知,除草原、农作物外其他植被类型均与T_(max)表现为显著偏正相关(P<0.05);不同植被类型与T_(min)的偏相关关系差异明显,农作物与T_(min)表现为显著偏负相关(P<0.01),其他植被类型与T_(min)均呈偏正相关性(P<0.05)。
英文摘要: In this paper,the meteorological observation data of 102 meteorological stations in the Loess Plateau and its surrounding areas in 1982-2015 were selected.The Normalized Difference Vegetation Index (NDVI) and vegetation type data were used.And the Mann-kendall (m-k) Nonparametric test method and the second-order partial correlation analysis were adopted.The time series change trend and spatial pattern in the growing seasonal minimum temperature (T_(min)) and maximum temperature (T_(max)) over the Loess Plateau between 1982 and 2015 were analyzed,and the effects of asymmetric warming on different vegetation type were discussed.The results show that:① We found a persistent increase (P<0.01) in the growing seasonal T_(min) and T_(max) over the Loess Plateau between 1982-2015,whereas the rate of increase of T_(min) was 1.6 times that of T_(max).②The influence of diurnal asymmetry on vegetation dynamics showed an obvious difference,and NDVI and T_(min) showed a more significant correlation than NDVI and T_(max) in vegetative growth season.The effect of nighttime warming on NDVI in the Loess plateau is more significant than that of daytime warming.③We also found diverse responses of vegetation type to daytime and night-time warming across the Loess Plateau.We found that the partial correlation between NDVI and T_(max) was positive(P<0.05) except grassland and crop.The partial correlation between T_(min) and NDVI of crop was negative(P<0.01),and the partial correlation between T_(min) and NDVI of other vegetation was positive(P<0.05).Our results provide a demonstration for studying regional responses of vegetation to climate extremes under global climate change.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/155449
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作者单位: 1.河南大学环境与规划学院, 开封, 河南 475004, 中国
2.中国科学院地理科学与资源研究所, 北京 100101, 中国
3.河南大学土木建筑学院, 开封, 河南 475004, 中国

Recommended Citation:
马利群,秦奋,孙九林,等. 黄土高原昼夜不对称性增温及其对植被NDVI的影响[J]. 资源科学,2018-01-01,40(8):787-793
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