MAX-DOAS measurements of BrO and NO2 in the marine boundary layer -: art. no. 1537

被引：105

作者：

Leser, H ^{[1
]}

Hönninger, G ^{[1
]}

Platt, U ^{[1
]}

机构：

[1] Univ Heidelberg, Inst Umweltphys, D-69122 Heidelberg, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2003年 / 30卷 / 10期

关键词：

D O I：

10.1029/2002GL015811

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] During a cruise of the German research vessel Polarstern from Bremerhaven, Germany to Capetown, South Africa in October 2000 mid latitude tropospheric bromine oxide (BrO) and nitrogen dioxide (NO2) abundances were investigated by ground-based MAX-DOAS ( scattered light Multi Axis Differential Optical Absorption Spectroscopy). By comparing the slant column densities of absorbers measured at different elevation angles above the horizon (5degrees to 90degrees) it is possible to draw conclusions regarding the vertical distribution of the investigated absorbers (i.e., BrO and NO2). During a period of 2 days in the region north of the Canary Islands (around 35degreesN, 13degreesW) significant boundary layer BrO in the 1 ppt range was found. For the remaining time all data points ranged below the detection limit. Boundary layer NO2 was found near Europe and the Canary Islands with mixing ratios in the range of several ppb. In the remote marine air south west of Africa upper limits were derived.

引用

页码：44 / 1

页数：4

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