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中国农学通报 ›› 2026, Vol. 42 ›› Issue (6): 150-163.doi: 10.11924/j.issn.1000-6850.casb2025-0798

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

2001—2022年江苏NDVI变化及其对极端气候的响应

徐恩(), 沈伟(), 周航, 王锦杰, 颜雅琼, 姚海涛   

  1. 宿迁市气象局, 江苏宿迁 223800
  • 收稿日期:2025-09-17 修回日期:2026-01-07 出版日期:2026-03-25 发布日期:2026-03-30
  • 通讯作者:
    沈伟,男,1985年出生,江苏宿迁人,高级工程师,本科,研究方向:气象服务与应用气象。通信地址:223800 江苏省宿迁市宿城区洪泽湖路722号 宿迁市气象局,E-mail:
  • 作者简介:

    徐恩,女,1995年出生,江苏宿迁人,工程师,本科,研究方向:极端天气与气候变化。通信地址:223800 江苏省宿迁市宿城区洪泽湖路722号 宿迁市气象局,E-mail:

  • 基金资助:
    江苏省气象局北极阁基金科研项目“江苏城市(群)对极端小时降水影响的研究及数值模式评估”(KM202623); 江苏省气象局指导性科研项目“江苏省极端气候事件与植被时空演变及响应关系研究”(ZD202424)

NDVI Variation and Its Response to Extreme Climate in Jiangsu During 2001-2022

XU En(), SHEN Wei(), ZHOU Hang, WANG Jinjie, YAN Yaqiong, YAO Haitao   

  1. Suqian Meteorological Bureau, Suqian, Jiangsu 223800
  • Received:2025-09-17 Revised:2026-01-07 Published:2026-03-25 Online:2026-03-30

摘要:

本研究基于2001—2022年江苏省NDVI遥感数据和气象数据,旨在探讨江苏省极端气候对植被的影响,重点关注植被和极端气候指数的时空演变及二者响应关系。研究计算了18个极端气候指数,采用Sen趋势分析、MK检验、R/S分析和相关分析等方法进行分析。结果表明:(1)2001—2022年江苏省年最大NDVI呈波动下降趋势,空间呈“北高南低”格局,未来51.70%的地区可能退化。(2)江苏省极端高温和极端低温的强度均增强,暖指数变化幅度大于冷指数,白天变化速率高于夜间,极端降水整体呈上升趋势,南部增幅大于中北部。(3)NDVI与极端气温暖指数在沿淮及其以北地区主要呈正相关,淮河以南以负相关为主;与冷指数在沿江及长江以北的东部沿海地区呈负相关,长江以北中西部和东南沿海则以正相关为主;NDVI与极端降水指数主要呈负相关。研究结果可为江苏省生态保护、植被恢复及气候变化适应性管理提供科学支撑。

关键词: NDVI, 极端气候, 时空变化, Hurst指数, 江苏省

Abstract:

Based on NDVI remote sensing data and meteorological data of Jiangsu from 2001 to 2022, aiming at exploring the impact of extreme climate events on vegetation in Jiangsu, the paper calculated 18 extreme climate indices and employed the methods including Sen’s trend analysis, Mann-Kendall (MK) test, R/S analysis, and Pearson correlation to analyze the spatio-temporal characteristics of extreme climate and vegetation changes, as well as their response relationships. The results showed that: (1) from 2001 to 2022, the annual maximum NDVI in Jiangsu exhibited a fluctuating downward trend, with a spatial pattern of ‘higher in the north and lower in the south’; over the 22-year period, 18.50% of the area in province experienced extremely significant degradation, while 9.62% showed extremely significant improvement; in the future, 51.70% of the region might degrade. (2) In Jiangsu, both extreme high and low temperatures had intensified, with the magnitude of change in warm indices being greater than that in cold indices; the rate of daytime changes was higher than nighttime changes; extreme precipitation showed an overall increasing trend, with greater increases in the south compared to the central and northern regions. (3) NDVI and extreme temperature warm indices were mainly positively correlated in areas along the Huaihe River and to its north, while negative correlations dominated south of the Huaihe River; for cold indices, negative correlations were observed along the Yangtze River and the eastern coastal areas to the north of the river, whereas positive correlations prevailed in the central-western and southeastern coastal regions to the north of the Yangtze River; NDVI and extreme precipitation indices were mainly negatively correlated, with negative correlation areas exceeding 50%. In a word, the relationship between extreme climate and vegetation growth shows significant spatial heterogeneity, providing a scientific support for ecological conservation, vegetation restoration, and climate adaptation management in Jiangsu.

Key words: NDVI, extreme climate, spatio-temporal change, Hurst index, Jiangsu