研究报告

  • 王宇程,朱君,徐国杰.亚洲碳质气溶胶与生物质燃烧分布特征及相关性研究[J].环境科学学报,2023,43(2):330-339

  • 亚洲碳质气溶胶与生物质燃烧分布特征及相关性研究
  • Distribution characteristics and correlation of carbonaceous aerosols and biomass burning in Asia
  • 基金项目:国家重点研发计划(No.2022YFE0106500);国家自然科学基金(No.41975161,42030608)
  • 作者
  • 单位
  • 王宇程
  • 南京信息工程大学大气物理学院,江苏省大气环境监测与污染控制实验室,中国气象局气溶胶与云降水重点开放实验室,南京 210044
  • 朱君
  • 南京信息工程大学大气物理学院,江苏省大气环境监测与污染控制实验室,中国气象局气溶胶与云降水重点开放实验室,南京 210044
  • 徐国杰
  • 南京信息工程大学大气物理学院,江苏省大气环境监测与污染控制实验室,中国气象局气溶胶与云降水重点开放实验室,南京 210044
  • 摘要:气溶胶与气候的相互影响随全球变暖趋势日渐显著,生物质燃烧(Biomass burning,BB)对气候环境的影响同样不容小觑.基于MODIS气溶胶与火点遥感数据和MERRA-2再分析数据,研究了亚洲气溶胶光学厚度(Aerosol optical depth,AOD)、黑碳(Black carbon,BC)、有机碳(Organic carbon,OC)与BB分布变化特征,并分析了亚洲BB与碳质气溶胶的相关性.结果表明:①亚洲AOD高值集中于阿拉伯半岛(春季:0.815,夏季:0.947)、中国中东部和青藏高原南侧,阿拉伯海海域夏季AOD由岸向海降低,青藏高原南侧冬季BC较为突出(6.517 μg·m-2),中南半岛OC高值时间上不连续.②亚洲BB多发于印尼群岛(夏、秋两季)、中南半岛(冬、春两季)、青藏高原南侧和俄罗斯部分地区.③中南半岛秋、冬、春三季碳质气溶胶与BB密切关系:柬埔寨秋季西南部出现BB与BC的正相关高值,相关系数为0.602;缅甸、老挝地区冬季为正相关 关系区(BC:0.773,OC:0.839);老挝北部春季表现为负相关高值(BC:-0.745,OC:-0.739).④青藏高原BB罕见但其与BC呈高度负相关(春季: -0.724,夏季:-0.686,秋季:-0.64),青藏高原南缘BB与碳质气溶胶关系密切,其中,孟加拉国南部和印度两邦BB对中国西南、西北地区碳质 气溶胶有一定贡献.
  • Abstract:The impact of biomass burning (BB) on the climate cannot be underestimated, as aerosol-climate interactions are becoming more pronounced with the global warming. Based on MODIS aerosol and fire point remote sensing data and MERRA-2 reanalysis data, we characterized the changes in aerosol optical depth (AOD), black carbon (BC), organic carbon (OC), and BB distribution in Asia. The correlation between BB and carbonaceous aerosols in Asia was also analyzed. The results show that: ① The high values of AOD in Asia are concentrated in the Arabian Peninsula (spring: 0.815, summer: 0.947), central-eastern China, and the southern side of the Qinghai-Tibet Plateau. AOD decreases from shore to sea over the Arabian Sea in summer, BC is more prominent in winter on the southern side of the Qinghai-Tibet Plateau (6.517 μg·m-2), and high values of OC are temporally discontinuous in the south-central peninsula. ② Asian BB occurs mostly in the Indonesian Archipelago (summer and autumn), the Central-South Peninsula (winter and spring), the southern side of the Qinghai-Tibet Plateau, and parts of Russia.③ Carbonaceous aerosols are closely related to BB in autumn, winter and spring in the South-Central Peninsula: A strong positive correlation (correlation coefficient value is 0.602) of BB and BC occurs in the southwestern part of Cambodia in autumn; the value is 0.773 for BC and 0.839 for OC in Myanmar and Laos in winter. A strong negative correlation (BC: -0.745, OC: -0.739) occurs in Northern Laos in spring. ④ BB is sparse on the Qinghai-Tibetan Plateau in South Asia but it shows a strong negative correlation with BC (spring: -0.724, summer: -0.686, autumn: -0.64). BB is closely related to carbonaceous aerosols on the southern margin of the Qinghai-Tibetan Plateau, among which BB in two states of southern Bangladesh and India may have some contributions to carbonaceous aerosols in the southwest and northwest China.

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