Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements
Spectral measurements of the direct solar radiation were made by a pyrheliometer at Mizuho Station, Antarctica in the POLEX-South radiation measuring program. From the broadband measurement using cutoff filters, aerosol optical depths were derived by the Langley method without using a predetermined...
Main Author: | |
---|---|
Format: | Report |
Language: | English |
Published: |
National Institute of Polar Research
1982
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1324 http://id.nii.ac.jp/1291/00001324/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1324&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00001324 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00001324 2023-05-15T13:47:59+02:00 Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements Takashi Yamanouchi 1982-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1324 http://id.nii.ac.jp/1291/00001324/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1324&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1324 http://id.nii.ac.jp/1291/00001324/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 24, 1-12(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1324&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1982 ftnipr 2022-11-12T19:42:11Z Spectral measurements of the direct solar radiation were made by a pyrheliometer at Mizuho Station, Antarctica in the POLEX-South radiation measuring program. From the broadband measurement using cutoff filters, aerosol optical depths were derived by the Langley method without using a predetermined extraterrestrial solar radiation. Average aerosol optical depths were obtained as 0.020,0.015 and 0.010 for the wavelength region 0-532nm, 532-632nm and 632-693nm respectively. The Ångstrom turbidity coefficient β=0.007,wavelength exponent α=1.4 and optical depth at 500nm _<^τM>(500)=0.017±0.005 were estimated. Comparing with the optical depth measured in Antarctica in the past, present result was in good accordance with the recent measurements made by SHAW using the sun-photometer. Several difficulties in making the results accurate and some disadvantages in broadband measurements are discussed. Report Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Station ENVELOPE(44.317,44.317,-70.683,-70.683) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Spectral measurements of the direct solar radiation were made by a pyrheliometer at Mizuho Station, Antarctica in the POLEX-South radiation measuring program. From the broadband measurement using cutoff filters, aerosol optical depths were derived by the Langley method without using a predetermined extraterrestrial solar radiation. Average aerosol optical depths were obtained as 0.020,0.015 and 0.010 for the wavelength region 0-532nm, 532-632nm and 632-693nm respectively. The Ångstrom turbidity coefficient β=0.007,wavelength exponent α=1.4 and optical depth at 500nm _<^τM>(500)=0.017±0.005 were estimated. Comparing with the optical depth measured in Antarctica in the past, present result was in good accordance with the recent measurements made by SHAW using the sun-photometer. Several difficulties in making the results accurate and some disadvantages in broadband measurements are discussed. |
format |
Report |
author |
Takashi Yamanouchi |
spellingShingle |
Takashi Yamanouchi Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
author_facet |
Takashi Yamanouchi |
author_sort |
Takashi Yamanouchi |
title |
Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
title_short |
Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
title_full |
Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
title_fullStr |
Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
title_full_unstemmed |
Derivation of atmospheric turbidity at Mizuho Station, Antarctica from the broadband solar radiation measurements |
title_sort |
derivation of atmospheric turbidity at mizuho station, antarctica from the broadband solar radiation measurements |
publisher |
National Institute of Polar Research |
publishDate |
1982 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1324 http://id.nii.ac.jp/1291/00001324/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1324&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(44.317,44.317,-70.683,-70.683) |
geographic |
Mizuho Mizuho Station |
geographic_facet |
Mizuho Mizuho Station |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1324 http://id.nii.ac.jp/1291/00001324/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 24, 1-12(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1324&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248259812065280 |