TY - JOUR
T1 - Comparison of data for Ozone amounts and UV doses obtained from simultaneous measurements with various standard UV instruments
AU - Dahlback, Arne
AU - Eide, Hans A.
AU - Høiskar, Britt Ann K.
AU - Olsen, Robert O.
AU - Schmidlin, Francis J.
AU - Tsay, Si Chee
AU - Stamnes, Knut
PY - 2003
Y1 - 2003
N2 - Recent technology advances have made measurements of UV doses and ozone column amounts with multi-channel filter instruments not only possible, but also an attractive alternative to other more labor-intensive and weather dependent methods. Filter instruments can operate unattended for long periods of time, and it is possible to obtain accurate ozone column amounts even on cloudy days. We present results from extensive comparisons of the performance of several NILU-UV and GUV filter instruments against Dobson and Brewer instruments and the EP-TOMS instrument. The data used in the comparisons are from four different sites where we have had the opportunity to operate more than one type of UV instruments for extended periods of time. The sites include the University of Oslo, Norway, Ny-Ålesund, Spitzbergen, Norway, the NASA Goddard Space Flight Center facilities at Wallops Island, VA, and Greenbelt, MD and the University of Alaska, Fairbanks. Our results show that ozone column amounts obtained with current filter-type instruments are just as good as those obtained with the Dobson instrument. The mean difference between NILU-UV and Dobson direct sun measurements were 0.4%±1.9% (1σ) in Oslo 2000-2003. The difference between a GUV and the same Dobson was 1.7%±1.4% for the same time period. The mean difference between GUV and TOMS in Ny-Ålesund 79°N and Oslo 60°N in the period 1996-1999 was < 0.5%±3% for days with noon SZA < 80°.
AB - Recent technology advances have made measurements of UV doses and ozone column amounts with multi-channel filter instruments not only possible, but also an attractive alternative to other more labor-intensive and weather dependent methods. Filter instruments can operate unattended for long periods of time, and it is possible to obtain accurate ozone column amounts even on cloudy days. We present results from extensive comparisons of the performance of several NILU-UV and GUV filter instruments against Dobson and Brewer instruments and the EP-TOMS instrument. The data used in the comparisons are from four different sites where we have had the opportunity to operate more than one type of UV instruments for extended periods of time. The sites include the University of Oslo, Norway, Ny-Ålesund, Spitzbergen, Norway, the NASA Goddard Space Flight Center facilities at Wallops Island, VA, and Greenbelt, MD and the University of Alaska, Fairbanks. Our results show that ozone column amounts obtained with current filter-type instruments are just as good as those obtained with the Dobson instrument. The mean difference between NILU-UV and Dobson direct sun measurements were 0.4%±1.9% (1σ) in Oslo 2000-2003. The difference between a GUV and the same Dobson was 1.7%±1.4% for the same time period. The mean difference between GUV and TOMS in Ny-Ålesund 79°N and Oslo 60°N in the period 1996-1999 was < 0.5%±3% for days with noon SZA < 80°.
KW - Brewer
KW - Clouds
KW - Dobson
KW - Filter-instruments
KW - Ozone measurements
KW - TOMS
KW - UV radiation
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U2 - 10.1117/12.509072
DO - 10.1117/12.509072
M3 - Conference article
AN - SCOPUS:2342483168
SN - 0277-786X
VL - 5156
SP - 15
EP - 27
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
T2 - Ultraviolet Ground- and Space-based Measurements, Models and Effects III
Y2 - 4 August 2003 through 6 August 2003
ER -