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Potential benefit of extra radiosonde observations around the Chukchi Sea for the Alaskan short-range weather forecast
https://nipr.repo.nii.ac.jp/records/15924
https://nipr.repo.nii.ac.jp/records/15924bf6a2637-b83b-4280-9918-53a633dcbfb8
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-09-30 | |||||
タイトル | ||||||
タイトル | Potential benefit of extra radiosonde observations around the Chukchi Sea for the Alaskan short-range weather forecast | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Potential benefit of extra radiosonde observations around the Chukchi Sea for the Alaskan short-range weather forecast | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Arctic ocean | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Weather forecasts | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Ship-borne radiosonde observation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Data assimilation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Observing system experiment | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Lee, Min-Hee
× Lee, Min-Hee× Kim, Joo-Hong× Song, Hyo-Jong× Inoue, Jun× Sato, Kazutoshi× Yamazaki, Akira |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In recent years, growing attentions have been paid to the potential benefit of extra observations over the data-sparse Arctic Ocean for weather forecasts. Here we also focus on such a case by targeting the inhabited land area, Alaska. During 2–18 August 2015, ship-borne radiosonde sounding observations were performed every 12 h (except 6-hourly from 12:00 UTC 11 August to 00:00 UTC 14 August) around the Chukchi Sea. To assess the impact of those extra radiosonde observations, two sets of ensemble forecast experiments (CTLf and OSE_Af) were produced, which were respectively initialized by atmospheric reanalysis data without (CTL) and with (OSE_A) additional assimilation of those data. The tropospheric circulation fields are compared to verify their differences in forecast performance. While two forecasts have similar performance in the earlier spin-up period of the analysis-forecast cycle (from 4 to 7 August), their performance tends to diverge in the later period (from 11 to 18 August) due to the accumulated influence on the error reduction in OSE_Af. Among the improved forecasts in OSE_Af, two most outperformed forecasts, each initialized on 00:00 UTC 12 and 00:00 UTC 14, show a notable improvement in predicting the developing trough over Alaska on 16–17 August by suppressing the development of erroneous high anomalies in CTLf. Though the positive impact of single-point observations is limited in a space, our results suggest that enhanced radiosonde profile observations in the data-sparse polar ocean could be beneficial for the forecasts beyond the observational area. | |||||
書誌情報 |
en : Polar Science 巻 21, p. 124-135, 発行日 2019-09 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.polar.2018.12.005 | |||||
関連名称 | 10.1016/j.polar.2018.12.005 |