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遥感技术与应用  2023, Vol. 38 Issue (5): 1071-1080    DOI: 10.11873/j.issn.1004-0323.2023.5.1071
海南遥感观测专栏     
1982~2015年海南岛NDVI时空变化及气候驱动力分析
陈甲豪(),胡中民,吴凯()
海南大学 生态与环境学院,海南 海口 570228
Spatiotemporal Variations of NDVI and the Analysis of Its Climate Driving Factors in Hainan Island During 1982~2015
Jiahao CHEN(),Zhongmin HU,Kai WU()
College of Ecology & Environment,Hainan University,Haikou 570228,China
 全文: PDF(6040 KB)   HTML
摘要:

为了揭示海南岛植被覆盖长期变化趋势以及进一步确定影响海南岛植被变化的主要气候驱动因子,为海南岛植被应对气候变化以及植被的良性发展提供科学指导。基于GIMMS NDVI数据,采用趋势分析法,探究1982~2015年海南岛植被的时空变化趋势;利用偏相关分析和主成分回归分析研究34 a里温度、降水和太阳辐射对海南岛植被变化的影响。研究表明:①空间上海南岛植被在北部和沿海地区呈明显增加趋势,而三亚及周边地区存在多处植被退化区域;②时间上海南岛植被整体以缓慢增长为主,增速为0.019/10 a,年际变化明显;③温度和太阳辐射显著主导海南岛88%地区的植被生长,其驱动因子存在如下关系:太阳辐射作用>温度作用>降水的驱动作用;④温度主导海南岛北部及西部地区植被的生长,太阳辐射主导驱动岛屿南部的植被生长,而降水是岛屿中部植被的主导气候驱动因子。综上所述,海南岛植被总体呈现良性发展的趋势,温度和太阳辐射是促进植被生长的主要气候因子。

关键词: 海南岛归一化植被指数时空变化气候驱动力    
Abstract:

To reveal the long-term variation trend of vegetation cover and further determine the main climatic driving factors affecting vegetation variation in Hainan Island. Also, to provide scientific evidence related to the impact of climate change on vegetation and scientific basis for achieving vegetation optimum development in island regions. The spatiotemporal variation trend of vegetation in Hainan Island from 1982 to 2015 was explored by applying trend analysis method to the GIMMS NDVI data. The effects of temperature, precipitation, and solar radiation on vegetation variability in Hainan Island were investigated by partial correlation analysis and principal component regression analysis over the 34 years. Results show that: ①Spatially, vegetation exhibited a significant increasing trend in the northern and coastal regions of Hainan Island while displayed a degeneration trend in Sanya city and its surrounding areas. ②Temporally, we found the vegetation in Hainan Island showed a slowly increased trend in most areas with a speed of 0.019/10 a and its intra-annual variability was obvious. ③In general, temperature and solar radiation jointly dominate the vegetation growth in 88% areas of Hainan Island in a significant way. Solar radiation was the most important climate driving factor to control vegetation variability in Hainan Island, followed by temperature, and precipitation had a small impact on the vegetation variability. ④Temperature dominated the vegetation variability in the northern and western areas of the Hainan Island. By contrast, solar radiation dominated the vegetation variability in the southern areas of the Hainan Island. Precipitation was the dominant climate driving factor to explain the variability of forests in the middle of the Hainan Island. Overall, this study found that temperature and solar radiation were two major climate driving factors which affected vegetation growth in the Hainan Island.

Key words: Hainan Island    NDVI    Spatiotemporal variations    Climate driving factors
收稿日期: 2022-03-16 出版日期: 2023-11-07
ZTFLH:  TP79  
基金资助: 中国工程科技发展战略海南研究院咨询研究项目(21?HN?ZT?09);海南大学科研启动基金项目(KYQD(ZR)?22084);海南省科技项目(ZDYF2022SHFZ042)
通讯作者: 吴凯     E-mail: cjh15546450951@163.com;kaiwu@hainanu.edu.cn
作者简介: 陈甲豪(1998–),男,河南驻马店人,硕士研究生,主要从事生态遥感研究。E?mail:cjh15546450951@163.com
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引用本文:

陈甲豪,胡中民,吴凯. 1982~2015年海南岛NDVI时空变化及气候驱动力分析[J]. 遥感技术与应用, 2023, 38(5): 1071-1080.

Jiahao CHEN,Zhongmin HU,Kai WU. Spatiotemporal Variations of NDVI and the Analysis of Its Climate Driving Factors in Hainan Island During 1982~2015. Remote Sensing Technology and Application, 2023, 38(5): 1071-1080.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2023.5.1071        http://www.rsta.ac.cn/CN/Y2023/V38/I5/1071

图1  2000年海南岛土地利用类型
图2  1982~2015海南岛NDVI变化趋势空间分布和显著性检验
图3  1982~2015海南岛NDVI年内变化和年际变化趋势
图4  海南岛NDVI与温度、降水和太阳辐射偏相关系数(P<0.05)
气候因子

正相关

面积比

正相关系数空间均值

负相关

面积比

负相关系数空间均值

极显著区域

(P<0.01)

显著区域

(0.01≤P≤0.05)

不显著区域

(P>0.05)

温度68.47%0.1631.53%-0.1067.76%7.06%25.18%
降水76.00%0.0624.00%-0.0419.29%11.06%69.65%
太阳辐射87.06%0.1212.94%-0.0956.00%7.53%36.47%
表1  海南岛NDVI与气候因子偏相关系数和显著性
图5  海南岛NDVI与温度、降水和太阳辐射的主成分回归系数(P<0.05)
图6  海南岛植被变化气候驱动力
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