Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica
The measurements of profiles of wind speed and air temperature in the atmospheric surface layer above bare ice surface in the circumference of the Yamato Mountains were carried out under neutral and unstable conditions in December, 1973. The results are summarized as follows: 1) The value of aerodyn...
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| Format: | Article |
| Language: | English |
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National Institute of Polar Research
1978-03-01
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| Series: | Antarctic Record |
| Online Access: | https://doi.org/10.15094/00007979 |
| _version_ | 1818289130780491776 |
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| author | Shun'ichi KOBAYASHI |
| author_facet | Shun'ichi KOBAYASHI |
| author_sort | Shun'ichi KOBAYASHI |
| collection | DOAJ |
| description | The measurements of profiles of wind speed and air temperature in the atmospheric surface layer above bare ice surface in the circumference of the Yamato Mountains were carried out under neutral and unstable conditions in December, 1973. The results are summarized as follows: 1) The value of aerodynamic roughness parameter (Z_0) was constantly 0.085 cm independent on wind speed, and this value corresponded to the depth of spoon-cut features (2-3 cm) on the bare ice surface. 2) The relation between the friction velocity (U_*) and the wind speed at 1 m height (U_1) is expressed by U_*=0.057 U_1. 3) Atmosphere showed an unstable condition (negative Richardson number) with the decrease of wind speed, as the bare ice surface was heated by radiation. 4) Eddy diffusivity obtained on the bare ice surface in neutral condition was larger than that of sea ice around Syowa Station. |
| first_indexed | 2024-12-13T02:07:23Z |
| format | Article |
| id | doaj.art-06b424144e0f44e7aee972a34c59bcd3 |
| institution | Directory Open Access Journal |
| issn | 0085-7289 2432-079X |
| language | English |
| last_indexed | 2024-12-13T02:07:23Z |
| publishDate | 1978-03-01 |
| publisher | National Institute of Polar Research |
| record_format | Article |
| series | Antarctic Record |
| spelling | doaj.art-06b424144e0f44e7aee972a34c59bcd32022-12-22T00:03:05ZengNational Institute of Polar ResearchAntarctic Record0085-72892432-079X1978-03-0161112210.15094/00007979Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, AntarcticaShun'ichi KOBAYASHI0The Institute of Low Temperature Science, Hokkaido UniversityThe measurements of profiles of wind speed and air temperature in the atmospheric surface layer above bare ice surface in the circumference of the Yamato Mountains were carried out under neutral and unstable conditions in December, 1973. The results are summarized as follows: 1) The value of aerodynamic roughness parameter (Z_0) was constantly 0.085 cm independent on wind speed, and this value corresponded to the depth of spoon-cut features (2-3 cm) on the bare ice surface. 2) The relation between the friction velocity (U_*) and the wind speed at 1 m height (U_1) is expressed by U_*=0.057 U_1. 3) Atmosphere showed an unstable condition (negative Richardson number) with the decrease of wind speed, as the bare ice surface was heated by radiation. 4) Eddy diffusivity obtained on the bare ice surface in neutral condition was larger than that of sea ice around Syowa Station.https://doi.org/10.15094/00007979 |
| spellingShingle | Shun'ichi KOBAYASHI Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica Antarctic Record |
| title | Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica |
| title_full | Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica |
| title_fullStr | Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica |
| title_full_unstemmed | Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica |
| title_short | Observation of the Atmospheric Surface Layer on Bare Ice in the Circumference of the Yamato Mountains, Antarctica |
| title_sort | observation of the atmospheric surface layer on bare ice in the circumference of the yamato mountains antarctica |
| url | https://doi.org/10.15094/00007979 |
| work_keys_str_mv | AT shunichikobayashi observationoftheatmosphericsurfacelayeronbareiceinthecircumferenceoftheyamatomountainsantarctica |