Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0132.1 |
Testing the Sensitivity of the Extratropical Response to the Location, Amplitude, and Propagation Speed of Tropical Convection | |
Goss, Michael; Feldstein, Steven B. | |
2018-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:2页码:639-655 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The dynamical core of a dry global model is used to investigate the role of central Pacific versus warm pool tropical convection on the extratropical response over the North Pacific and North America. A series of model runs is performed in which the amplitude of the warm pool (WP) and central Pacific (CP) heating anomalies associated with the MJO and El Nino-Southern Oscillation (ENSO) is systematically varied. In addition, model calculations based on each of the eight MJO phases are performed, first using stationary heating, and then with heating corresponding to a 48-day MJO cycle and to a 32-day MJO cycle. In all model runs, the extratropical response to tropical convection occurs within 7-10 days of the convective heating. The response is very sensitive to the relative amplitude of the heating anomalies. For example, when heating anomalies in theWP and CP have similar amplitude but opposite sign, the amplitude of the extratropical response is much weaker than is typical for theMJO and ENSO. For the MJO, when theWP heating anomaly is much stronger than the CP heating anomaly (vice versa for ENSO), the extratropical response is amplified. For the MJO heating, it is found that the extratropical responses to phases 4 and 8 are most distinct. A likely factor contributing to this distinctiveness involves the relative amplitude of the two heating anomalies. The stationary and moving (48-and 32-day) heating responses are very similar, revealing a lack of sensitivity to theMJO phase speed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425753300014 |
WOS关键词 | CIRCULATION RESPONSE ; SOUTHERN-OSCILLATION ; EL-NINO ; MJO ; TEMPERATURE ; ANOMALIES ; PACIFIC ; WIND |
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/29652 |
专题 | 地球科学 |
作者单位 | Penn State Univ, Dept Meteorol, 503 Walker Bldg, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Goss, Michael,Feldstein, Steven B.. Testing the Sensitivity of the Extratropical Response to the Location, Amplitude, and Propagation Speed of Tropical Convection[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(2):639-655. |
APA | Goss, Michael,&Feldstein, Steven B..(2018).Testing the Sensitivity of the Extratropical Response to the Location, Amplitude, and Propagation Speed of Tropical Convection.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(2),639-655. |
MLA | Goss, Michael,et al."Testing the Sensitivity of the Extratropical Response to the Location, Amplitude, and Propagation Speed of Tropical Convection".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.2(2018):639-655. |
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