Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0545.1 |
MJO Prediction Skill of the Subseasonal-to-Seasonal Prediction Models | |
Lim, Yuna1; Son, Seok-Woo1; Kim, Daehyun2 | |
2018-05-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:10页码:4075-4094 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; USA |
英文摘要 | The Madden-Julian oscillation (MJO), the dominant mode of tropical intraseasonal variability, provides a major source of tropical and extratropical predictability on a subseasonal time scale. This study conducts a quantitative evaluation of the MJO prediction skill in state-of-the-art operational models, participating in the subseasonal-to-seasonal (S2S) prediction project. The relationship of MJO prediction skill with model biases in the mean moisture fields and in the longwave cloud-radiation feedbacks is also investigated. The S2S models exhibit MJO prediction skill out to a range of 12 to 36 days. The MJO prediction skills in the S2S models are affected by both the MJO amplitude and phase errors, with the latter becoming more important at longer forecast lead times. Consistent with previous studies, MJO events with stronger initial MJO amplitude are typically better predicted. It is found that the sensitivity to the initial MJO phase varies notably from model to model. In most models, a notable dry bias develops within a few days of forecast lead time in the deep tropics, especially across the Maritime Continent. The dry bias weakens the horizontal moisture gradient over the Indian Ocean and western Pacific, likely dampening the organization and propagation of the MJO. Most S2S models also underestimate the longwave cloud-radiation feedbacks in the tropics, which may affect the maintenance of the MJO convective envelope. The models with smaller bias in the mean horizontal moisture gradient and the longwave cloud-radiation feedbacks show higher MJO prediction skills, suggesting that improving those biases would enhance MJO prediction skill of the operational models. |
英文关键词 | Atmosphere Madden-Julian oscillation Forecast verification skill Intraseasonal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430910200003 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; INTRASEASONAL OSCILLATION ; NORTHERN WINTER ; FORECAST SYSTEM ; TEMPERATURE ; PROPAGATION ; CLIMATE ; BUDGET ; TELECONNECTIONS ; PREDICTABILITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20877 |
专题 | 气候变化 |
作者单位 | 1.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Lim, Yuna,Son, Seok-Woo,Kim, Daehyun. MJO Prediction Skill of the Subseasonal-to-Seasonal Prediction Models[J]. JOURNAL OF CLIMATE,2018,31(10):4075-4094. |
APA | Lim, Yuna,Son, Seok-Woo,&Kim, Daehyun.(2018).MJO Prediction Skill of the Subseasonal-to-Seasonal Prediction Models.JOURNAL OF CLIMATE,31(10),4075-4094. |
MLA | Lim, Yuna,et al."MJO Prediction Skill of the Subseasonal-to-Seasonal Prediction Models".JOURNAL OF CLIMATE 31.10(2018):4075-4094. |
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