A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica
The present study describes the optical technique that has been developed to measure the variation of the spatial density of blowing snow particles suspended in air. The light source (the emitter) used was an incandescent lamp (12V, 20 W), and a diameter of light beam was 46mm. The receiver was used...
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National Institute of Polar Research
1975
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ftdoajarticles:oai:doaj.org/article:9c1d65027d6945bd9a7161345cc80f69 2023-05-15T13:59:54+02:00 A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica Shun'ichi KOBAYASHI Kinken MAKINO 1975-08-01T00:00:00Z https://doi.org/10.15094/00007813 https://doaj.org/article/9c1d65027d6945bd9a7161345cc80f69 EN JA eng jpn National Institute of Polar Research https://doi.org/10.15094/00007813 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00007813 0085-7289 2432-079X https://doaj.org/article/9c1d65027d6945bd9a7161345cc80f69 Antarctic Record, Iss 53, Pp 45-52 (1975) Geography (General) G1-922 article 1975 ftdoajarticles https://doi.org/10.15094/00007813 2022-12-31T05:23:28Z The present study describes the optical technique that has been developed to measure the variation of the spatial density of blowing snow particles suspended in air. The light source (the emitter) used was an incandescent lamp (12V, 20 W), and a diameter of light beam was 46mm. The receiver was used a photo transister. This instruments were set in two levels of 1 m and 2m at Syowa Station (69° S, 39.5°E) in 1973. The transmission path of light were 4.5m in both case. If it is assumed that snow particles in blowing snow are the same size and the same shape, then the attenuation of a light beam should depend on the spatial density of blowing snow. The emprical correlations between the attenuation of a light beam (the transmittivity) and the mean visibility, and between the transmittivity and the drift flux were given for practical use. Observations made only in night time and during the period of high winds (also called Antarctic blizzards). For example, when the mean wind speed at 10m level was 30 m/s, the drift flux at 1 m level changed quickly between 80 and 400g/m^2・s. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Syowa Station |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Shun'ichi KOBAYASHI Kinken MAKINO A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
topic_facet |
Geography (General) G1-922 |
description |
The present study describes the optical technique that has been developed to measure the variation of the spatial density of blowing snow particles suspended in air. The light source (the emitter) used was an incandescent lamp (12V, 20 W), and a diameter of light beam was 46mm. The receiver was used a photo transister. This instruments were set in two levels of 1 m and 2m at Syowa Station (69° S, 39.5°E) in 1973. The transmission path of light were 4.5m in both case. If it is assumed that snow particles in blowing snow are the same size and the same shape, then the attenuation of a light beam should depend on the spatial density of blowing snow. The emprical correlations between the attenuation of a light beam (the transmittivity) and the mean visibility, and between the transmittivity and the drift flux were given for practical use. Observations made only in night time and during the period of high winds (also called Antarctic blizzards). For example, when the mean wind speed at 10m level was 30 m/s, the drift flux at 1 m level changed quickly between 80 and 400g/m^2・s. |
format |
Article in Journal/Newspaper |
author |
Shun'ichi KOBAYASHI Kinken MAKINO |
author_facet |
Shun'ichi KOBAYASHI Kinken MAKINO |
author_sort |
Shun'ichi KOBAYASHI |
title |
A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
title_short |
A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
title_full |
A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
title_fullStr |
A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
title_full_unstemmed |
A Preliminary Report on the Blowing Snow Observation using the Light Scattering in High Winds at Syowa Station, Antarctica |
title_sort |
preliminary report on the blowing snow observation using the light scattering in high winds at syowa station, antarctica |
publisher |
National Institute of Polar Research |
publishDate |
1975 |
url |
https://doi.org/10.15094/00007813 https://doaj.org/article/9c1d65027d6945bd9a7161345cc80f69 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Antarctic Record, Iss 53, Pp 45-52 (1975) |
op_relation |
https://doi.org/10.15094/00007813 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00007813 0085-7289 2432-079X https://doaj.org/article/9c1d65027d6945bd9a7161345cc80f69 |
op_doi |
https://doi.org/10.15094/00007813 |
_version_ |
1766268829768351744 |