报告详情
  1. 活动首页
  2. 报告清单
  3. 报告详情
Black carbon (BC) and brown carbon (BrC) over South China Sea and the eastern Indian Ocean
编号：1261 访问权限：仅限参会人 更新：2024-10-21 14:05:39 浏览：182次 拓展类型1

报告开始：2025年01月15日 13:30（Asia/Shanghai）

报告时间：15min

所在会场：[S25] Session 25-IGAC-SOLAS: Chemistry and Physics at Surface Ocean and Lower Atmosphere [S25-5] IGAC-SOLAS: Chemistry and Physics at Surface Ocean and Lower Atmosphere

暂无文件

摘要
Black carbon (BC) and brown carbon (BrC) are the key light-absorbing components of atmospheric particulate matter (PM). The sources, compositions, and light absorption properties of BC and BrC over South/East Asian marine regions remain poorly constrained. We carried out ship-based and island-based sampling campaigns. For BC, the source apportionment, using δ13C–14C dual-carbon isotope signatures, showed that ship emission was the predominant BC source (54%) in the South China Sea (SCS) where at proximity to mainland China, while biomass burning (BB) was the major contributor in the open north-eastern Indian Ocean and the open SCS (40-56%). A contribution from BB up to 70% during BB period in Southeast Asia was observed at a coastal background site along the western SCS. For BrC, we found that the mass absorption efficiency (MAE365) of water-soluble organic carbon (WSOC) in the marine aerosols correlated well with absorption Ångström exponent (AAE), but with the lowest response of MAE365 to AAE when compared to those of continental sites, owing to the difference in aromatic compound contents derived from combustion sources. Our observations imply that a better control of ship emission and biomass burning in the region would contribute to climate change mitigation by reducing the direct atmospheric radiative forcing from BC and BrC.
关键词
Black carbon (BC),brown carbon (BrC),radiocarbon (14C),light absorption property,South China Sea (SCS),Indian Ocean,ship emission,biomass burning (BB)
报告人
Gan Zhang
Professor Guangzhou Institute of Geochemistry, Chinese Academy of Science

稿件作者
Gan Zhang Guangzhou Institute of Geochemistry, Chinese Academy of Science
发表评论
验证码 看不清楚，更换一张
全部评论
重要日期

  • 会议日期

    01月13日

    2025

    至

    01月17日

    2025

  • 09月27日 2024

    初稿截稿日期

  • 01月17日 2025

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
承办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
联系方式
登录查看完整联系方式
移动端
在手机上打开
小程序
打开微信小程序
客服
扫码或点此咨询