Estimation of solar backscatter ultraviolet albedo using ground-based Umkehr measurements
- National Oceanic and Atmospheric Administration, Boulder, CO (United States)
- Univ. of Colorado, Boulder (United States)
- NASA Langley Research Center, Hampton, VA (United States)
A retrieval method was developed to estimate the solar backscatter ultraviolet (SBUV) satellite albedo for the ozone profiler wavelengths using ground-based ultraviolet measurements. For the present investigation the Umkehr was used as the ground-based ultraviolet measurement. Simulated SBUV data and Umkehr data theoretically computed from a priori ozone profiles observed by the SAGE II satellite were used to develop the retrieval algorithm and to test its capability. The test indicated that albedos for the SBUV ozone profiler wavelengths should allow estimates to a precision of [plus minus]5% or better, depending on the accuracy of the ultraviolet measurement. Retrievals using actual Umkehr observations were also performed to provide a preliminary look at the magnitude and annual variation of retrieved albedos. A case study was performed, comparing retrieved albedos with SBUV-measured albedos. The SBUV albedo change was seen to be approximately twice as large as the albedo changes estimated by the Umkehr method. Results of the investigation suggest that the method of estimation may be useful for determining the drift rate of the SBUV calibration. 20 refs., 5 figs., 4 tabs.
- OSTI ID:
- 6721308
- Journal Information:
- Journal of Geophysical Research; (United States), Vol. 98:D2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
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