書誌事項
- タイトル別名
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- A study of methods to estimate visibility based on weather conditions.
- キショウ ジョウケン カラ シテイ オ スイテイ スル シュホウ ノ ケンキュウ
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説明
Provision of real-time information on the distribution of poor visibility caused by blowing snow will enable drivers to select safer routes. Visibility meters currently are used to monitor visibility on roads. However, too few such devices are installed to adequately monitor the regional distribution of blowing snow. This has led us to seek estimation methods for the degree of poor visibility based on wind velocity and snowfall intensity, data that are available relatively easily. First, based on findings of past studies on mass flux of snow (Mf) and visibility (Vis) we established that log (Vis)=-0.733·log(Mf)+2.845 when the visibility is 3000 m or less. We then attempted to establish methods to obtain snow concentration based on the fact that the mass flux of snow is snow concentration multiplied by wind velocity. For this, we used two specific scenarios in order to estimate snow concentration based on wind velocity and snowfall intensity: the case in which the wind velocity at 10 m above the ground was 8.5 m/s or greater and the temperature was -2°C or lower; and the case in which the wind velocity at 10 m above the ground was less than 8.5 m/s and snow was falling. The visibility estimated by our formulae corresponded fairly well to measured values, which indicates that our visibility estimation method can be used for regional monitoring of poor visibility on roads.
収録刊行物
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- 雪氷
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雪氷 64 (1), 77-85, 2002
公益社団法人 日本雪氷学会
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詳細情報 詳細情報について
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- CRID
- 1390282681439095424
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- NII論文ID
- 10007760945
- 10011063089
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- NII書誌ID
- AN00131221
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- ISSN
- 18836267
- 03731006
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- NDL書誌ID
- 6059849
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDLサーチ
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
