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Direct effects of aerosols on global warming/cooling

气溶胶对全球变暖/变冷的直接影响

基本信息

批准号：
14048228
负责人：
SHIOBARA Masataka
金额：
$ 21.89万
依托单位：
National Institute of Polar Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14048228/
关键词：
aerosol atmospheric environment East Asia global warming cooling Direct effect optical properties single scattering albedo エアロゾル複素屈折率海洋境界層

项目摘要

In this research project, to assess the direct effect of aerosols on the global warming/cooling, physical/optical and chemical properties of aerosols were investigated based on ground-based and ship-board aerosol measurements around Japan. Results from long-term ground measurement at Chichi-jima and the R/V Shirase on-board measurement around Japan are summarized as follows :1) The aerosol single scattering albedo (SSA) is one of important optical parameters for aerosol characteristics. The SSA values observed at Chichi-jima were 0.98-1.0 under typical weather conditions with subtropical high pressure systems, 0.96-0.98 in spring (April) and around 0.9 in winter (January).2) From the R/V Shirase on-board aerosol measurement around Japan in early autumns of 2002-2005, typical three cases with different features of aerosol properties were found: (1) SSA=0.98-1.0 for a sea salt particle rich aerosol under clean maritime atmosphere, (2) SSA=0.94-0.98 for anthropogenic sulfate and soil dust rich aerosols under continental air mass, and (3) SSA=0.85-0.94 for pollution atmosphere contaminated by combustion products during transport over Japan from Chinese Continent.3) As shown above, we obtained a consistent result from both ground-based and ship-board measurements for optical and chemical properties of aerosols around Japan.

在该研究项目中，为了评估气溶胶对全球变暖/变冷的直接影响，根据日本各地的陆基和船上气溶胶测量结果，对气溶胶的物理/光学和化学性质进行了研究。通过对日本秩次岛气溶胶的长期地面观测和白濑号R/V船载观测，总结了以下几点：1）气溶胶单次散射谱（SSA）是表征气溶胶特性的重要光学参数之一。在有副热带高压系统的典型天气条件下，秩支岛观测到的SSA值为0.98-1.0，春季（4月）为0.96-0.98，冬季（1月）为0.9左右。2）2002-2005年早秋，白濑号船在日本附近的气溶胶观测中，发现了三个具有不同气溶胶特征的典型个例：（1）在清洁的海洋大气下，富含海盐颗粒的气溶胶的SSA=0.98-1.0;（2）在大陆气团下，人为的硫酸盐和土壤尘丰富的气溶胶的SSA=0.94-0.98;（3）在从中国大陆经日本输送期间，燃烧产物污染的大气的SSA=0.85-0.94。我们获得了一致的结果，从地面和船上测量的光学和化学性质的气溶胶在日本各地。