| 杨君楠,狄光智.喀斯特地区植被NPP对城市热岛效应降缓程度研究[J].林业调查规划,2023,48(1):18-22 |
| 喀斯特地区植被NPP对城市热岛效应降缓程度研究 |
| Mitigation Degree of Vegetation NPP on Urban Heat Island Effect in Karst Area |
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| DOI： |
| 中文关键词: 热岛效应 植被NPP 地表温度 喀斯特地区 |
| 英文关键词: heat island effect vegetation NPP surface temperature karst area |
| 基金项目:昆明市林业信息工程技术研究中心项目（20150205）. |
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| 中文摘要: |
| 为了分析研究区植被净初级生产力对热岛效应的降缓程度，基于MODIS和Landsat数据，对百色地区的植被NPP与地表温度进行反演估算，利用ArcGIS软件对地表温度分布图进行等级划分，采用随机样点法提取不同等级的地表温度及植被NPP，分析喀斯特地区植被净初级生产力对热岛效应的降缓程度。研究结果表明，研究区2017年植被NPP整体较好，植被NPP均值为907.83 gC/m2，植被NPP空间分布较为均匀；百色地区热岛分布区较少，在喀斯特地貌背景下整体地表温度较为正常，研究区热岛效应及植被NPP由强到弱依次为：强热岛＞次热岛＞正常区＞绿岛＞冷岛；研究发现，植被NPP与地表温度之间存在明显的负相关，地表温度一定程度上随植被NPP的上升而下降；植被NPP对热岛效应在强热岛向次热岛降缓时程度最为明显。 |
| 英文摘要: |
| In order to analyze the mitigation degree of vegetation net primary productivity on the heat island effect in the study area, based on MODIS and Landsat data, this paper estimated the vegetation NPP and land surface temperature by inversion in Baise area, used ArcGIS software to graded the surface temperature distribution map, extracted different grades of surface temperature and vegetation NPP by random sampling method, and analyzed the mitigation degree of vegetation NPP on heat island effect in karst area. The research results showed that the overall vegetation NPP in the study area in 2017 was relatively good, with the average vegetation NPP of 907.83 gC/m2, and the spatial distribution of vegetation NPP was relatively uniform; the Baise area had fewer heat islands, and the overall surface temperature of the area was relatively high under the background of karst landforms; the heat island effect and vegetation NPP in the study area were divided into strong heat island>secondary heat island>normal area>green island>cold island from strong to weak; the study found that there was a significant negative correlation between vegetation NPP and surface temperature, and the surface temperature decreased with the increase of vegetation NPP to a certain extent; the effect of vegetation NPP on the heat island was most obvious when the strong heat island decreased to the secondary heat island. |
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