Reduction of weather effects in the calculation of sea-ice concentration with the DMSP SSM/I
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A problem in mapping the polar sea-ice covers in both hemispheres has been the sporadic false indication of sea ice over the open ocean and at the ice edge. These spurious sea-ice concentrations result from variations in sea-surface roughening by surface winds, atmospheric water vapor and both precipitating and non-precipitating liquid water. This problem was addressed for sea-ice concentrations derived from the Nimbus-7 scanning multi-channel microwave radiometer (SMMR) data through the development of a weather filter based on spectral information from the 18.0 and 37.0 GHz vertical polarization SMMR channels. Application of a similar filter for use with sea-ice concentration maps derived with the special-sensor microwave imager (SSM/I) sensor is less successful. This results from the position of the 19.35 GHz SSM/I channels, which are closer to the center of the 22.2 GHz atmospheric water-vapor line than are the SMMR 18.0 GHz channels. Thus, the SSM/I 19.35 GHz channels are more sensitive to changes in atmospheric water vapor, which results in greater contamination problems. An additional filter has been developed, based on a combination of the 19.35 and 22.2GHz. SSM/I channels. Examples of the effectiveness of the new filter are presented and limitations are discussed.
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GR2219v is mostly effective at detecting water vapour effects, while GR3719v is effective at screening cloud liquid water and wind-roughening effects.
“Indeed, GR2219v is mostly effective at detecting water vapour effects, while GR3719v is effective at screening cloud liquid water and wind-roughening effects (Cavalieri et al., 1995).”
From Version 2 of the EUMETSAT OSI SAF and ESA CCI sea-ice concentration climate data records (2019) · cites this paper as Cavalieri et al., 1995
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Research works printed but not linked: 1
- St. Germain, K . :\1. 1993. Applications of spectral microwa\'e radio- metry to sen sing of sea ice and th e ocea n surface. (Ph.D. thesis. Uni\-crsity of :'IIassachusetts, Amherst. \
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Version 2 of the EUMETSAT OSI SAF and ESA CCI sea-ice concentration climate data records
Lavergne, T., Sørensen, A. M., Kern, S., Tonboe, R., Notz, D., Aaboe, S., Bell, L., Dybkjær, G., Eastwood, S., Gabarro, C., et al. (2019) · The Cryosphere · doi:10.5194/tc-13-49-2019 · Cited by 469 · see citing works
- Authors
- Cavalieri, D. J., St. Germain, K. M., & Swift, C. T.
- Affiliations
- Goddard Space Flight Center (US)
- University of Massachusetts Amherst (US)
- Venue
- Journal of Glaciology
- Publisher
- International Glaciological Society
- Published
- 1995
- Volume
- 41
- Issue
- 139
- Pages
- 455-464
- ISSN
- 0022-1430 (ISSN-L)
- 1727-5652
- OpenAlex
- W179483504
- Cited by
- 117
- References
- 0
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 3 · 2023: 9 · 2022: 5 · 2021: 7 · 2020: 3 · 2019: 9 · 2018: 2 · 2017: 2 · 2016: 6 · 2015: 6 · 2014: 5 · 2013: 2 · 2012: 2
- FWCI
- 2.16
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Glaciology (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Arctic and Antarctic ice dynamics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Cryospheric studies and observations
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Ocean Waves and Remote Sensing
- Keywords
- sea ice concentration, DMSP SSM/I, ice edge, atmospheric water vapor, sea surface roughness, SMMR, microwave radiometry
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