辽西北地区1998—2020年气候变化对生长季NDVI影响的量化分析

doi:10.13292/j.1000-4890.202407.031

生态学杂志 ›› 2024, Vol. 43 ›› Issue (7): 2189-2197.doi: 10.13292/j.1000-4890.202407.031

辽西北地区1998—2020年气候变化对生长季NDVI影响的量化分析

李雪华¹,季飞龙^1,4,李晓东³,温日红²,王笑影^2*,苏宝玲⁵,蓝慧慧⁵

(¹中国科学院沈阳应用生态研究所，沈阳 110016； ²中国气象局沈阳大气环境研究所，沈阳 110166； ³滨州学院，山东滨州 256600； ⁴中国科学院大学，北京 100049； ⁵沈阳大学生命科学与工程学院，沈阳 110044)

出版日期:2024-08-10 发布日期:2024-07-09

Quantitative analysis of the influence of climate change on NDVI of Northwest Liaoning in the growing season from 1998 to 2020.

LI Xuehua¹, JI Feilong^1,4, LI Xiaodong³, WEN Rihong², WANG Xiaoying^2*, SU Baoling⁵, LAN Huihui⁵

(¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ²Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China; ³Binzhou University, Binzhou 256600, Shandong, China; ⁴University of Chinese Academy of Sciences, Beijing 100049, China; ⁵College of Life Science and Bioengineering, Shenyang University, Shenyang 110044, China).

Online:2024-08-10 Published:2024-07-09

摘要/Abstract

摘要： 精准量化气候变化对NDVI的影响趋势和确定关键驱动气象要素，对于生态脆弱区的植被管理具有重要意义。基于辽西北地区23个气象站点1998—2020年生长季气象数据和MODIS NDVI遥感影像数据，利用Theil-Sen Median斜率估计和Mann-Kendall趋势分析法，分析了NDVI、气温、降水、日照时数和蒸散发的变化趋势。运用空间插值、相关分析、多元回归和波段运算，探讨了NDVI与气象要素的相关性及关键气候驱动力的时空格局。结果表明：辽西北地区1998—2020年NDVI以倾向率0.03 10 a^-1呈显著增加趋势(P<0.01)，但气候变化趋势不显著。1998—2008年和2009—2020年气温、蒸散发、日照时数和降水变化趋势相反。辽西北地区NDVI与气温、蒸散发和日照时数主要呈负相关而与降水呈正相关，2009—2020年NDVI与气候相关性明显弱于1998—2008年。1998—2008年日照时数和蒸散发相对重要值比例分别为54.52%和22.93%，分别是中西部和东部植被变化的主要驱动因子。2009—2020年蒸散发和气温相对重要值比例分别为38.18%和26.89%，蒸散发主要影响中部和西北部，而气温主要驱动的局域分布较分散。辽西北地区植被变化受降水影响相对较小。研究明确了区域植被变化及局域关键气候驱动要素，可为辽西北生态脆弱区修复提供科学依据。

关键词: NDVI, 气候驱动, 变化趋势, 生长季, 辽西北地区

Abstract: Accurately quantifying the influence of climate change on NDVI and determining key driving meteorological factors are of great significance for vegetation management in ecologically fragile areas. Based on the meteorological data and MODIS NDVI remote sensing image data of 23 meteorological stations in Northwest Liaoning during the growing season from 1998 to 2020, we analyzed the change trends of NDVI, air temperature, precipitation, sunshine time and evapotranspiration using Theil-Sen Median slope estimation and Mann-Kendall trend analysis. The correlation between NDVI and meteorological elements and the spatial-temporal variations of key climate drivers were examined by using spatial interpolation, correlation analysis, multiple regression, and bandmath. The results showed that NDVI significantly increased with a rate of 0.03 10a^-1 from 1998 to 2020 in Northwest Liaoning (P<0.01), but the change of climate was not significant. The trends of the changes in air temperature, evapotranspiration, sunshine time, and precipitation during 1998-2008 and 2009-2020 were opposite. In Northwest Liaoning, NDVI was negatively correlated with air temperature, evapotranspiration, and sunshine time, but positively correlated with precipitation. The correlations between NDVI and those four climatic factors during 2009-2020 were obviously weaker than that during 1998-2008. The proportion of relative importance value for sunshine time and evapotranspiration was 54.52% and 22.93% during 1998-2008, which were the main driving factors of NDVI in central-western part and eastern part, respectively. During 2009-2020, the proportion of relative importance value for evapotranspiration and air temperature accounted for 38.18% and 26.89%, respectively. Evapotranspiration mainly affected the NDVI of central-northwest part, while the local distribution pattern of NDVI mainly driven by air temperature was relatively scattered. Precipitation had slight effects on vegetation change in Northwest Liaoning. This study clarified the regional vegetation change and the driving climate factors, which could provide scientific basis for vegetation restoration of ecologically fragile areas in Northwest Liaoning.

Key words: NDVI, climate driven, change trend, growing season, Northwest Liaoning

李雪华, 季飞龙, 李晓东, 温日红, 王笑影, 苏宝玲, 蓝慧慧. 辽西北地区1998—2020年气候变化对生长季NDVI影响的量化分析[J]. 生态学杂志, 2024, 43(7): 2189-2197.

LI Xuehua, JI Feilong, LI Xiaodong, WEN Rihong, WANG Xiaoying, SU Baoling, LAN Huihui. Quantitative analysis of the influence of climate change on NDVI of Northwest Liaoning in the growing season from 1998 to 2020.[J]. Chinese Journal of Ecology, 2024, 43(7): 2189-2197.

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辽西北地区1998—2020年气候变化对生长季NDVI影响的量化分析

Quantitative analysis of the influence of climate change on NDVI of Northwest Liaoning in the growing season from 1998 to 2020.

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