Understanding the Benefits from Green Areas in Rome: The Role of Evergreen and Deciduous Species in Carbon Dioxide Sequestration Capability

• 作者: Loretta Gratani
• 来源期刊: 美国植物学期刊(英文)
• 学科: 数学
• 关键词: CO₂ Sequestration Green Areas Cities Evergreens Deciduous Species MEADOWS
• 年，卷（期）: 2020,（8）
• 页码范围: 1307-1318
• 页数: 12页
• 分类号: O17

摘要

Urban areas are a major source of anthropogenic carbon dioxide (CO_{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;">) emissions because of road traffic and local heating with natural gas, oil or coal. Rome is among the largest European cities (129,000 ha) with a large volume of green areas (69.6% of the total Municipality area). The CO</span>_{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;"> sequestration (CS) capability for the greenery extending for about 300 km</span>^{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;"> inside the area delimited by the Great Ring Road (GRA) in Rome was calculated combining satellite data with CS data measured in the field. Data from Sentinel-2 were collected and the Normalized Difference Vegetation Index (NDVI) was computed on a pixel-base. Three plant classes homogeneous in terms of annual NDVI profile were identified: deciduous trees (DT), evergreen trees (ET) and meadows (M) covering an area of 14,142.027 ha within the GRA, of which M had the highest percentage (48%), followed by DT (27%) and ET (25%). CS ranged from 428,241</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;">492.9 </span><span style="font-family:Verdana;">T</span><span style="font-family:;" "=""><span style="font-family:Verdana;">ons CO</span>_{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;"> year</span>^{<span style="font-family:Verdana;">-1</span>}<span style="font-family:Verdana;"> (ET) to 263,072</span></span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;">460.6 Tons CO</span>_{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;"> year</span>^{<span style="font-family:Verdana;">-1</span>}<span style="font-family:Verdana;"> (M). The total CS of the greenery inside the GRA was 1049,490,355.4 Tons CO</span><sub><