Climate Change Characteristics of Jiaozishan National Nature Reserve and Its Impact on NDVI

REN Yitong; CHENG Qingping; JIN Hanyu; ZHANG Hongying; WANG Ping

doi:10.13870/j.cnki.stbcxb.2022.04.022

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Climate Change Characteristics of Jiaozishan National Nature Reserve and Its Impact on NDVI

更新时间：2025-03-12

- Climate Change Characteristics of Jiaozishan National Nature Reserve and Its Impact on NDVI
- Vol. 36, Issue 4, Pages: 168-177(2022)
- 作者机构：
  
  1. 西南林业大学地理与生态旅游学院,昆明,650224
  2. 西南生态文明研究中心,昆明,650224
  3. 中国科学院西北生态环境与资源研究院玉龙雪山冰冻圈与可持续发展国家(云南省)科学野外观测研究站,兰州,730000
  4. 云南师范大学地理学部,昆明,650500
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.04.022
  CLC： K903
- Published：2022
- 稿件说明：
移动端阅览
REN Yitong, CHENG Qingping, JIN Hanyu, et al. Climate Change Characteristics of Jiaozishan National Nature Reserve and Its Impact on NDVI[J]. 2022, 36(4): 168-177.
DOI：

REN Yitong, CHENG Qingping, JIN Hanyu, et al. Climate Change Characteristics of Jiaozishan National Nature Reserve and Its Impact on NDVI[J]. 2022, 36(4): 168-177. DOI： 10.13870/j.cnki.stbcxb.2022.04.022.

摘要

轿子山国家级自然保护区保存有最完整的滇中高原植被与生境，是气候敏感性热点地区之一。采用一元线性回归、Pettitt突变检验、Spearman相关系数等方法识别1961—2019年气候要素和极端气候指数变化特征，1999—2016年归一化植被指数（NDVI）时空变化趋势特征及对极端气候指数的响应，旨在辨识轿子山植被变化特征及对极端气候变化的动态响应，以期为保护区的气候风险评估提供参考依据。结果表明：（1）全球变暖下，1961—2019年气候要素（平均气温、日照时间、风速、雾日）变化趋势显著，垂直温度带组合动态变化，2017—2019年基带由南亚热带转为北热带；（2）整体来看，1961—2019年极端气温指数变化率和突变点较极端降水指数显著；（3）1999—2016年NDVI增速随海拔升高降低，以海拔2 736，3 236 m为界，NDVI增长速率的变化率表现为"高—低—高"；（4） NDVImean、NDVImax、NDVImin对极端气温指数的相关性总体上强于极端降水指数，对暖指数、降水强度指数、极端降水日指数响应最为敏感；（5）如果（极端）气候变化超过植被耐受阈值，则可能抑制植被生长。鉴于未来气候变化的不确定性，有必要进一步识别极端气候变化对保护区NDVI的影响，加强保护区极端气候风险预警、监测和管控。

Abstract

Jiaozishan National Nature Reserve preserves the most complete vegetation and habitat of the central Yunnan Plateau

and is one of the hot spots with climate sensitivity. Univariate linear regression

Pettitt mutation test and Spearman correlation and other methods were used to analyze the change characteristics of climate elements and the extreme climate index from 1961 to 2019 in this area

as well as the temporal and spatial change trend characteristics of NDVI and its response to extreme climate index from 1999 to 2016. The aim was to study the climate change characteristics and the dynamic response of vegetation in Jiaozi Mountain

providing a reference for climate risk management in the reserve. The results showed that:(1) Global warming led to a significant change in the climate elements (average temperature

sunshine hours

wind speed and foggy day) from 1961 to 2019. The vertical temperature zones changed dynamically

and the baseband changed from a south subtropical zone to a north tropical zone in 2017-2019. (2) On the whole

the change rate and abrupt change point of the extreme temperature index from 1961 to 2019 were more significant than those of the extreme precipitation index. (3) From 1999 to 2016

the growth rate of NDVI decreased with the increasing of altitude. Taking the altitude of 2 736 m and 3 236 m as the boundary

the change rate of NDVI growth rate showed the trend of "high-low-high". (4) The correlation of NDVImean

NDVImax and NDVImin to extreme temperature index was stronger than that to extreme precipitation index

and NDVImean

NDVImax

NDVImin were most sensitive to warm index

precipitation intensity index and extreme precipitation day index. (5) If (extreme) climate change exceeds the vegetation tolerance threshold

vegetation growth might be inhibited. In view of the uncertainty of future climate change

it is necessary to further identify the impact of extreme climate change on NDVI in the reserve and strengthen the early warning

monitoring and control of extreme climate risk in the reserve.

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