EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA
The effective emissivity of Antarctic clouds is calculated from radiation measurements using the radiometersonde in 1987 at Syowa Station, Antarctica. The accuracy of the radiometersonde near the surface is evaluated by comparison with a pyrgeometer on the ground surface. The effective emissivity is...
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Meteorological Research Institute
1995
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ftnipr:oai:nipr.repo.nii.ac.jp:00003885 2023-05-15T13:49:01+02:00 EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA ヤマモト アキラ ヤマノウチ タカシ ワダ マコト Akira YAMAMOTO Takashi YAMANOUCHI Makoto WADA 1995-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3885 http://id.nii.ac.jp/1291/00003885/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3885&item_no=1&attribute_id=18&file_no=1 en eng Meteorological Research Institute National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3885 http://id.nii.ac.jp/1291/00003885/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 9, 133-145(1995-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3885&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1995 ftnipr 2022-12-24T19:48:15Z The effective emissivity of Antarctic clouds is calculated from radiation measurements using the radiometersonde in 1987 at Syowa Station, Antarctica. The accuracy of the radiometersonde near the surface is evaluated by comparison with a pyrgeometer on the ground surface. The effective emissivity is referred to vertical integrated liquid water content (LWC) from microwave radiation measurements. Though disagreement of measured volume might occur between the microwave radiometer and the sonde, the effective emissivity for downward flux correlates well to the LWC, but that for upward flux does not. A large discrepancy is found between the effective emissivity for upward flux and that for downward flux, and especially, for upward flux, the effective emissivity is very small in some cases. It is assumed that the scattering of longwave radiation by water and ice particles produces this discrepancy. The value of the LWC suggests that water particles may exist much closer to the cloud top than the cloud base. Difference among features of the effective emissivity due to type of cloud systems resolved from NOAA/AVHRR imagery is not found in this study. Report Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology National Institute of Polar Research Repository, Japan Antarctic Syowa Station |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
The effective emissivity of Antarctic clouds is calculated from radiation measurements using the radiometersonde in 1987 at Syowa Station, Antarctica. The accuracy of the radiometersonde near the surface is evaluated by comparison with a pyrgeometer on the ground surface. The effective emissivity is referred to vertical integrated liquid water content (LWC) from microwave radiation measurements. Though disagreement of measured volume might occur between the microwave radiometer and the sonde, the effective emissivity for downward flux correlates well to the LWC, but that for upward flux does not. A large discrepancy is found between the effective emissivity for upward flux and that for downward flux, and especially, for upward flux, the effective emissivity is very small in some cases. It is assumed that the scattering of longwave radiation by water and ice particles produces this discrepancy. The value of the LWC suggests that water particles may exist much closer to the cloud top than the cloud base. Difference among features of the effective emissivity due to type of cloud systems resolved from NOAA/AVHRR imagery is not found in this study. |
format |
Report |
author |
ヤマモト アキラ ヤマノウチ タカシ ワダ マコト Akira YAMAMOTO Takashi YAMANOUCHI Makoto WADA |
spellingShingle |
ヤマモト アキラ ヤマノウチ タカシ ワダ マコト Akira YAMAMOTO Takashi YAMANOUCHI Makoto WADA EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
author_facet |
ヤマモト アキラ ヤマノウチ タカシ ワダ マコト Akira YAMAMOTO Takashi YAMANOUCHI Makoto WADA |
author_sort |
ヤマモト アキラ |
title |
EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
title_short |
EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
title_full |
EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
title_fullStr |
EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
title_full_unstemmed |
EFFECTIVE EMISSIVITY OF CLOUDS FROM RADIOMETERSONDE MEASUREMENTS AT SYOWA STATION, ANTARCTICA |
title_sort |
effective emissivity of clouds from radiometersonde measurements at syowa station, antarctica |
publisher |
Meteorological Research Institute |
publishDate |
1995 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3885 http://id.nii.ac.jp/1291/00003885/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3885&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
genre_facet |
Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3885 http://id.nii.ac.jp/1291/00003885/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 9, 133-145(1995-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3885&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250443791400960 |