Journal Article

PreJuSER-40828

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement of atmospheric O3--> O(1D) photolysis frequencies using filterradiometry

Bohn, B.FZJ* ; Kraus, A.FZJ* ; Müller, M.FZJ* ; Hofzumahaus, A.FZJ*

2004
Union Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/20547  doi:10.1029/2003JD004319

Abstract: [1] In this work the instrumentation and characterization of a filterradiometer suitable for field measurements of O-3 --> O(D-1) photolysis frequencies, j((OD)-D-1), is described. A nonlinear calibration function considering ozone column and solar zenith angle is derived as well as a procedure utilizing an irradiance standard as an absolute reference. The measurement concept is tested by a field comparison with a spectroradiometer. Based solely on laboratory characterizations and simulated solar actinic flux spectra, a systematic deviation of 4% is obtained with a standard deviation of 3% at solar zenith angles below 70degrees. The standard deviation rises to 8% at solar zenith angles in the range 70degrees - 85degrees. The systematic difference is within the accuracy of the applied radiometric calibrations while the standard deviation is mainly caused by insufficient synchronization of the different measurement techniques under variable field conditions. In addition, the relative temperature dependence of j((OD)-D-1) as a function of solar zenith angle and ozone column is derived which is applicable to any ground-based j((OD)-D-1) measurement.

Keyword(s): J ; radiometry (auto) ; photolysis frequency (auto) ; ozone (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Troposphäre (ICG-II)

Research Program(s):

1. Chemie und Dynamik der Geo-Biosphäre (U01)

Appears in the scientific report 2004

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Database coverage:
; JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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