干旱气象 ›› 2024, Vol. 42 ›› Issue (6): 934-943.DOI: 10.11755/j.issn.1006-7639-2024-06-0934

• 论文 • 上一篇    下一篇

气候和人类活动对黄河干流甘肃段NDVI变化的影响

殷菲1(), 白冰1,2(), 黄鹏程1, 马玉龙1   

  1. 1.兰州区域气候中心,甘肃 兰州 730020
    2.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃 兰州 730020
  • 收稿日期:2024-01-16 修回日期:2024-06-25 出版日期:2024-12-31 发布日期:2025-01-15
  • 通讯作者: 白冰(1983—),男,辽宁阜新人,博士,高级工程师,主要从事生态气象监测评估及预警研究。E-mail:baibing_119@163.com
  • 作者简介:殷菲(1995—),女,甘肃酒泉人,硕士,工程师,主要从事气候变化与影响评估研究。E-mail:yinfei_0508@163.com
  • 基金资助:
    国家自然基金项目(42375039);中国气象局气象能力提升联合研究专项重点项目(22NLTSZ003);干旱气象科学研究基金项目(IAM202404);干旱气象科学研究基金项目(IAM202205);甘肃省科技基金计划项目(22JR5RA752)

Impact of climate and human activities on NDVI change in Gansu section of the Yellow River main stream

YIN Fei1(), BAI Bing1,2(), HUANG Pengcheng1, MA Yulong1   

  1. 1. Lanzhou Regional Climate Center,Lanzhou 730020,China
    2. Institute of Arid Meteorology, CMA, Key laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Disaster Reduction of CMA,Lanzhou 730020,China
  • Received:2024-01-16 Revised:2024-06-25 Online:2024-12-31 Published:2025-01-15

摘要:

研究气候变化和人类活动对黄河干流甘肃段植被的影响,对于黄河流域生态安全建设有一定意义。基于黄河干流甘肃段中分辨率成像光谱仪(Moderate-resolution Imaging Spectroradiometer,MODIS)归一化植被指数(Normalized Difference Vegetation Index,NDVI)、18个地面气象观测站的降水和气温数据,采用线性趋势分析、偏相关分析、残差分析等方法,对黄河干流甘肃段2001—2020年NDVI时空变化特征及气候变化和人类活动对NDVI变化的贡献度进行了定量分析。结果表明:黄河干流甘肃段2001—2020年NDVI增长速率为0.05·(10 a)-1,其中2001—2010年为缓慢上升阶段,增长率为0.04·(10 a)-1,2011—2020年为快速上升阶段,增长率为0.08·(10 a)-1;近20 a黄河干流甘肃段植被生态整体呈良性发展,植被改善区位于临夏回族自治州中北部、兰州市及白银市东南部地区。研究区内对NDVI变化起主导作用的气候因子各有不同,甘南州大部NDVI与气温的正相关性更高;临夏州北部、兰州市及白银市NDVI与降水量的相关性更显著。黄河流域甘肃段植被变化是气候因子和人类活动共同作用的结果,2001—2020年气候因子对NDVI变化的贡献度为75.27%,人类活动贡献度为24.73%,气候因子仍是黄河流域甘肃段植被变化的主导因素,但人类活动对植被变化的影响程度逐渐加深。

关键词: NDVI, 时空变化, 气候因子, 人类活动, 黄河干流甘肃段

Abstract:

The study of the impacts of climate change and human activities on the vegetation of the Gansu section of the Yellow River main stream is of significance for the construction of ecological security in the Yellow River Basin. Based on the NDVI (Normalized Difference Vegetation Index) of MODIS (Moderate-resolution Imaging Spectroradiometer) and the precipitation and air temperature data of 18 ground meteorological observation stations in the Gansu section of the Yellow River main stream, the spatial and temporal characteristics of NDVI and the contribution of climate change and human activities to the changes of NDVI in the Gansu section of the Yellow River main stream from 2001 to 2020 were quantitatively analyzed by using the methods of linear trend analysis, bias correlation analysis and residual analysis. The results show that the growth rate of NDVI in the Gansu section of the Yellow River main stream was 0.05·(10 a)-1 from 2001 to 2020, of which the 2001-2010 period was a slow increase stage with a growth rate of 0.04·(10 a)-1, and the 2011-2020 period was a rapid increase stage with a growth rate of 0.08·(10 a)-1. The vegetation ecology of the Gansu section of the Yellow River main stream showed a benign development in the past 20 years, and the vegetation improvement area was located in the north-central part of Linxia Hui Autonomous Prefecture, Lanzhou City and the southeastern part of Baiyin City. The climatic factors that dominate the changes of NDVI in the study area are different, the positive correlation between NDVI and air temperature is higher in most parts of Gannan Prefecture, while the correlation between NDVI and precipitation is more significant in the northern part of Linxia Prefecture, Lanzhou City and Baiyin City. The vegetation change in the Gansu section of the Yellow River Basin is the result of the joint action of climate factors and human activities, and the contribution of climate factors to the NDVI change from 2001 to 2020 is 75.27%, while the contribution of human activities is 24.73%. Climate factors are still the dominant factors for the vegetation change in the Gansu section of the Yellow River Basin, but the influence of human activities on the vegetation change is gradually deepening.

Key words: NDVI, spatial-temporal changes, climatic factors, human activities, Gansu section of the Yellow River main stream

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