Stratospheric BrO profiles measured at different latitudes and seasons: Instrument description, spectral analysis and profile retrieval

被引：30

作者：

Ferlemann, F ^{[1
]}

Camy-Peyret, C

Fitzenberger, R

Harder, H

Hawat, T

Osterkamp, H

Schneider, M

Perner, D

Platt, U

Vradelis, P

Pfeilsticker, K

机构：

[1] Univ Heidelberg, Inst Umweltphys, D-69120 Heidelberg, Germany

[2] Max Planck Inst Chem, D-55128 Mainz, Germany

[3] Univ Paris 06, CNRS, LPMA, Paris, France

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 20期

关键词：

D O I：

10.1029/1998GL900020

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Measurements of stratospheric BrO profiles are reported using a novel DOAS instrument (Differential Optical Absorption Spectrometry) operated on the LPMA/DOAS balloon gondola (LPMA/Laboratoire de Physique Moleculaire et Applications) during three flights (Leon, Nov. 23, 1998, Kiruna, Feb. 14, 1997, and Gap, June 20,1997). BrO was detected by its vibrational bands (4-0 at 354.7 nm; 5-0 at 348.8 nm) of the A((2)pi)<--X((2)pi) transition in direct sunlight spectra from balloon ascent, descent and during solar occultation at maximum (float) altitude. We show that our accuracy is about +/-18% (1 sigma) during balloon ascent (solar zenith angles, SZA < 88 degrees), and about +/-25% for solar occultation measurements. For altitudes above the balloon float our observations indicate average BrO mixing ratios of (14.4+/-2.5)ppt, (15.6+/-2.8)ppt, and (15.3+/-2.8)ppt above 30.0 km, 30.0 km, and 39.8 km, respectively.

引用

页码：3847 / 3850

页数：4

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