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。
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.
作者
陈甲豪
胡中民
吴凯
CHEN Jiahao;HU Zhongmin;WU Kai(College of Ecology&Environment,Hainan University,Haikou 570228,China)
出处
《遥感技术与应用》
CSCD
北大核心
2023年第5期1071-1080,共10页
Remote Sensing Technology and Application
基金
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)资助。
关键词
海南岛
归一化植被指数
时空变化
气候驱动力
Hainan Island
NDVI
Spatiotemporal variations
Climate driving factors
