Studies on strategic control of photochemical oxidants in mega-cities

特大城市光化学氧化剂的战略控制研究

• 批准号: 14208061
• 负责人: KONDO Yutaka
• 金额: $ 33.61万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14208061/
• 关键词: mega-city; ozone; CO; NOx; NOy; nitric acid; aerosol; 3D-Chemistry-Transport Model; Noy; Nox NOy; 硝酸イオン; 分光光度放射計; 3次元モデル; NOx NOy; PTR-MS; 航空機観測

We have developed instruments for precise measurements of ozone precursors (NOx,HNO_3,PAN,VOCs, and CO), OH and HO_2 radicals, and actinic flux. Measurement campaigns using these instruments were conducted in different seasons in 2003-2005. Especially, in July-August 2004, intensive measurements were made at two sites ; one in Tokyo and the other in Kisai-city in Saitama. At the same time, aerosol chemical composition at each size range was measured using an Aerodyne Aerosol Mass Spectrometer. Air mass which left Tokyo reaches Saitama in the afternoon, providing ideal conditions for investigationg chemical processes during transport. In mid-August, sea-land breeze developed under the influence of stable high pressure system. Under these conditions, O_3 reached high levels in northern Tokyo around 1300 LT. This O_3 levels further increased while the air mass was transported to Saitama by sea breeze. During the transport, NOx oxidation and O_3 formation occurred simultaneously. Organic aerosol was observed to be formed efficiently under high O_3 conditions. 3D-CTM has been developed taking into account the chemical and transport processes. This model well reproduces O_3 and precursors in Kanto area. By this model, it is indicated that O_3 was produced within a few hours near noon.

我们开发了精密测量臭氧前体（NOx、HNO_3、PAN、VOCs和CO）、OH和HO_2自由基以及光化通量的仪器。使用这些仪器的测量活动在2003-2005年的不同季节进行。特别是在2004年7 - 8月，在两个地点进行了密集测量；一个在东京，另一个在埼玉县的基赛市。同时，使用Aerodyne气溶胶质谱仪测量了每个尺寸范围内的气溶胶化学成分。离开东京的气团在下午到达埼玉，为研究运输过程中的化学过程提供了理想的条件。8月中旬，海陆风在稳定高压系统影响下发展。在这些条件下，东京北部的O_3在1300左右达到高水平。当气团被海风输送到埼玉时，O_3水平进一步增加。在输运过程中，NOx氧化和O_3生成同时发生。在高氧条件下，有机气溶胶的形成效率较高。3D-CTM的开发考虑了化学和运输过程。该模型较好地再现了关东地区的O_3和前体。根据该模型，O_3是在中午附近的几个小时内产生的。

项目成果

Takegawa, N., Y.Kondo, M.Koike, 他: "Removal of NOx and NOy in biomass burning plumes in the boundary layer over northern Australia"Journal of Geophysical Research. 108. doi:10.10292002JD002505 (2003)

Takekawa, N.、Y.Kondo、M.Koike 等人：“澳大利亚北部边界层生物质燃烧羽流中 NOx 和 NOy 的去除”108. doi:10.10292002JD002505 (2003)

Impacts of biomass burning in Southeast Asia on ozone and reactive nitrogen over the western Pacific in spring

• DOI: 10.1029/2003jd004203
• 发表时间: 2004-08
• 期刊: Journal of Geophysical Research
• 作者: Y. Kondo;Y. Morino;N. Takegawa;M. Koike;K. Kita;Y. Miyazaki;G. Sachse;S. Vay;M. Avery;F. F

Intercontinental Transport and Chemical Transformation 2002 (ITCT 2K2) and Pacific Exploration of Asian Continental Emission (PEACE) experiments: An overview of the 2002 winter and spring intensives

• DOI: 10.1029/2004jd004980
• 发表时间: 2004-12
• 期刊: Journal of Geophysical Research
• 作者: D. Parrish;Y. Kondo;O. Cooper;C. Brock;D. Jaffe;M. Trainer;T. Ogawa;G. Hübler;F. Fehsenfeld

Daniel J.Jcob著, 近藤豊訳: "大気化学入門"東京大学出版会. 278 (2002)

Daniel J. Jcob，Yutaka Kondo 译：《大气化学导论》，东京大学出版社 278 (2002)。

Removal of NOx and NOy in Asian outflow plumes: Aircraft measurements over the western Pacific in January 2002

• DOI: 10.1029/2004jd004866
• 发表时间: 2004-12
• 期刊: Journal of Geophysical Research
• 作者: N. Takegawa;Y. Kondo;M. Koike;Gao Chen;T. Machida;T. Watai;D. Blake;D. Streets;J. Woo;G. Carmichael;K. Kita;Y. Miyazaki;T. Shirai;J. Liley;T. Ogawa