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Detailed Reference Information |
Beine, H.J., Dahlback, A. and Ørbæk, J.B. (1999). Measurements of J(NO2) at Ny-Ålesund, Svalbard. Journal of Geophysical Research 104: doi: 10.1029/1999JD900237. issn: 0148-0227. |
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The photolytic rate constant of NO2,J(NO2), has been determined using two independent methods at the Ny-¿lesund International Arctic Research and Monitoring Facility. At the Zeppelin mountain station the Norwegian Institute for Air Research (NILU) has operated a commercially available J(NO2) radiometer since 1994. Additionally, a five-channel UV irradiance radiometer (GUV-541) was operated at Ny-¿lesund during 1995/1996. The results of the latter, together with surface albedo measured by the Norwegian Polar Institute (NP), are used as input in a radiative transfer model using the discrete ordinate method to calculate J(NO2) data. In this paper we present a detailed error discussion for the radiometer data and the quality controlled measurements of J(NO2). J(NO2) reached an annual maximum between 1994 and 1996 of up to 0.012 s-1 during springtime. Surface albedo was found to have a large influence on the radiative balance in the Arctic. Measured noontime data are compared with model results. Unweighted linear regression showed for 1996 a J(NO2)model/J(NO2)measure ratio of 0.90. This good agreement suggests that multichannel irradiance radiometers have the potential to be used to derive J values for a variety of trace gases. ¿ 1999 American Geophysical Union |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Troposphere—composition and chemistry, Atmospheric Composition and Structure, Instruments and techniques, Atmospheric Composition and Structure, Transmission and scattering of radiation, Atmospheric Composition and Structure, Chemical kinetic and photochemical properties, Atmospheric Composition and Structure, Aerosols and particles (0345, 4801), Meteorology and Atmospheric Dynamics, Polar meteorology, Meteorology and Atmospheric Dynamics, Precipitation |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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