Intercomparison of tropospheric OH measurements by different laser techniques during the POPCORN campaign 1994

被引：37

作者：

Hofzumahaus, A ^{[1
]}

Aschmutat, U ^{[1
]}

Brandenburger, U ^{[1
]}

Brauers, T ^{[1
]}

Dorn, HP ^{[1
]}

Hausmann, M ^{[1
]}

Hessling, M ^{[1
]}

Holland, F ^{[1
]}

Plass-Dülmer, C ^{[1
]}

Ehhalt, DH ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Atmosphar Chem, Julich, Germany

来源：

JOURNAL OF ATMOSPHERIC CHEMISTRY | 1998年 / 31卷 / 1-2期

关键词：

OH intercomparison; laser absorption spectroscopy; DOAS; laser induced fluorescence; LIF; troposphere;

D O I：

10.1023/A:1006014707617

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In-situ OH measurements by laser-induced fluorescence (LIF) spectroscopy and folded long-path differential optical absorption spectroscopy (DOAS) were carried out in a rural environment in North-East Germany as part of the field experiment POPCORN in August 1994. The large set of OH data obtained allowed an intercomparison of both techniques based on relative diurnal profiles and simultaneously measured absolute concentrations. Most of the time the two OH instruments encountered the same air and agreed well in the measured relative diurnal variations. Only on a few occasions the measurements significantly disagreed due to a perturbation of the DBAS measurements by a local OH source in the north-western wind sector. Excluding data from this wind direction, the statistical analysis of 137 data pairs yields a correlation coefficient of r = 0.90 and a weighted linear fit with a slope of 1.09 +/- 0.12. The correlations are carefully analyzed. The comparison of both instruments is discussed in the light of newly published effective absorption cross-sections for H(2)O and O(2) that affect the calibration of LIF.

引用

页码：227 / 246

页数：20

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