Comparison of Brewer ultraviolet irradiance measurements with total ozone mapping spectrometer satellite retrievals

Vitali E. Fioletov; James B. Kerr; David I. Wardle; Nickolay A. Krotkov; Jay R. Herman

doi:10.1117/1.1516818

1 December 2002 Comparison of Brewer ultraviolet irradiance measurements with total ozone mapping spectrometer satellite retrievals

Vitali E. Fioletov, James B. Kerr, David I. Wardle, Nickolay A. Krotkov, Jay R. Herman

Author Affiliations +

Optical Engineering, Vol. 41, Issue 12, (December 2002). https://doi.org/10.1117/1.1516818

Comparison of measured UV irradiance with estimates from satellite observation is potentially effective for the validation of data from the two sources. Summer data from ten Canadian Brewer sites were compared in this study with noon UV irradiance estimated from total ozone mapping spectrometer (TOMS) measurements. In general, TOMS estimates can successfully reproduce long-term and major short-term UV variations. However, there are some systematic differences between the measurements at the ground and satellite-retrieved UV irradiance. From 3 to 11% of the Brewer-TOMS difference can be attributed to the Brewer angular response error. This error depends on the solar zenith angle and cloud conditions, and is different from instrument to instrument. When the angular response of the Brewer instrument is considered and applied, the Brewer data are still lower than TOMS-estimated UV irradiance by 9 to 10% on average at all sites except one. The difference is close to zero at one station (Saturna Island), possibly due to its much cleaner air. The bias can be seen in clear sky conditions and at the 324-nm wavelength, i.e., it is not related to local cloud conditions or absorption by ozone or SO2.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Vitali E. Fioletov, James B. Kerr, David I. Wardle, Nickolay A. Krotkov, and Jay R. Herman "Comparison of Brewer ultraviolet irradiance measurements with total ozone mapping spectrometer satellite retrievals," Optical Engineering 41(12), (1 December 2002). https://doi.org/10.1117/1.1516818

Published: 1 December 2002

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available