Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I)

Jungang Miao; Klaus Peter Johnsen; Georg Heygster

Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I)

Jungang Miao^*
, Klaus Peter Johnsen
, Georg Heygster

^*Corresponding author for this work

University of Bremen

Research output: Contribution to conference › Paper › peer-review

Abstract

Quantitative determination of cloud parameters over sea ice using the radiometric measurements at SSM/I frequencies has been difficult due to the strong and highly variable surface emissions from sea ice. Here we try to suppress these variations using a ratio of polarisation differences at two frequencies, which is called the R-factor. Using a simple radiative transfer equation for a one-layer atmosphere, we proved that the surface signal and the atmospheric signal can be easily separated in the logarithmic expression of this R factor. If it is valid to assume that the surface parameter changes within two days are not very significant, the day-to-day variation of the cloud parameters (mainly the cloud liquid water) over sea ice can be detected using the SSM/I measurements.

Original language	English
Pages	2075-2077
Number of pages	3
State	Published - 1999
Externally published	Yes
Event	Proceedings of the 1999 IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99) 'Remote Sensing of the Systems Earth - A Challenge for the 21st Century' - Hamburg, Ger Duration: 28 Jun 1999 → 2 Jul 1999

Conference

Conference	Proceedings of the 1999 IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99) 'Remote Sensing of the Systems Earth - A Challenge for the 21st Century'
City	Hamburg, Ger
Period	28/06/99 → 2/07/99

Cite this

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title = "Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I)",

abstract = "Quantitative determination of cloud parameters over sea ice using the radiometric measurements at SSM/I frequencies has been difficult due to the strong and highly variable surface emissions from sea ice. Here we try to suppress these variations using a ratio of polarisation differences at two frequencies, which is called the R-factor. Using a simple radiative transfer equation for a one-layer atmosphere, we proved that the surface signal and the atmospheric signal can be easily separated in the logarithmic expression of this R factor. If it is valid to assume that the surface parameter changes within two days are not very significant, the day-to-day variation of the cloud parameters (mainly the cloud liquid water) over sea ice can be detected using the SSM/I measurements.",

author = "Jungang Miao and Johnsen, \{Klaus Peter\} and Georg Heygster",

year = "1999",

language = "英语",

pages = "2075--2077",

note = "Proceedings of the 1999 IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99) 'Remote Sensing of the Systems Earth - A Challenge for the 21st Century' ; Conference date: 28-06-1999 Through 02-07-1999",

}

Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I). / Miao, Jungang; Johnsen, Klaus Peter; Heygster, Georg.
1999. 2075-2077 Paper presented at Proceedings of the 1999 IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99) 'Remote Sensing of the Systems Earth - A Challenge for the 21st Century', Hamburg, Ger.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I)

AU - Miao, Jungang

AU - Johnsen, Klaus Peter

AU - Heygster, Georg

PY - 1999

Y1 - 1999

N2 - Quantitative determination of cloud parameters over sea ice using the radiometric measurements at SSM/I frequencies has been difficult due to the strong and highly variable surface emissions from sea ice. Here we try to suppress these variations using a ratio of polarisation differences at two frequencies, which is called the R-factor. Using a simple radiative transfer equation for a one-layer atmosphere, we proved that the surface signal and the atmospheric signal can be easily separated in the logarithmic expression of this R factor. If it is valid to assume that the surface parameter changes within two days are not very significant, the day-to-day variation of the cloud parameters (mainly the cloud liquid water) over sea ice can be detected using the SSM/I measurements.

AB - Quantitative determination of cloud parameters over sea ice using the radiometric measurements at SSM/I frequencies has been difficult due to the strong and highly variable surface emissions from sea ice. Here we try to suppress these variations using a ratio of polarisation differences at two frequencies, which is called the R-factor. Using a simple radiative transfer equation for a one-layer atmosphere, we proved that the surface signal and the atmospheric signal can be easily separated in the logarithmic expression of this R factor. If it is valid to assume that the surface parameter changes within two days are not very significant, the day-to-day variation of the cloud parameters (mainly the cloud liquid water) over sea ice can be detected using the SSM/I measurements.

UR - https://www.scopus.com/pages/publications/0033310970

M3 - 论文

AN - SCOPUS:0033310970

SP - 2075

EP - 2077

T2 - Proceedings of the 1999 IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99) 'Remote Sensing of the Systems Earth - A Challenge for the 21st Century'

Y2 - 28 June 1999 through 2 July 1999

ER -

Signature of clouds over sea ice detected by the Special Sensor Microwave/Imager (SSM/I)

Abstract

Conference

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