Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-8971-2017 |
Intraseasonal to interannual variability of Kelvin wave momentum fluxes as derived from high-resolution radiosonde data | |
Sjoberg, Jeremiah P.1,2; Birner, Thomas1; Johnson, Richard H.1 | |
2017-07-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:14 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Observational estimates of Kelvin wave momentum fluxes in the tropical lower stratosphere remain challenging. Here we extend a method based on linear wave theory to estimate daily time series of these momentum fluxes from high-resolution radiosonde data. Daily time series are produced for sounding sites operated by the US Department of Energy (DOE) and from the recent Dynamics of the Madden-Julian Oscillation (DYNAMO) field campaign. Our momentum flux estimates are found to be robust to different data sources and processing and in quantitative agreement with estimates from prior studies. Testing the sensitivity to vertical resolution, our estimated momentum fluxes are found to be most sensitive to vertical resolution greater than 1 km, largely due to overestimation of the vertical wavelength. Climatological analysis is performed over a selected 11-year span of data from DOE Atmospheric Radiation Measurement (ARM) radiosonde sites. Analyses of this 11-year span of data reveal the expected seasonal cycle of momentum flux maxima in boreal winter and minima in boreal summer, and variability associated with the quasi-biennial oscillation of maxima during easterly phase and minima during westerly phase. Comparison between periods with active convection that is either strongly or weakly associated with the Madden-Julian Oscillation (MJO) suggests that the MJO provides a nontrivial increase in the lowermost stratospheric momentum fluxes. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406388700002 |
WOS关键词 | QUASI-BIENNIAL OSCILLATION ; MADDEN-JULIAN OSCILLATION ; EQUATORIAL LOWER STRATOSPHERE ; QBO ; TEMPERATURE ; MJO ; DISTURBANCES ; CONVECTION ; PREDICTION ; TRACKING |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/22791 |
专题 | 地球科学 |
作者单位 | 1.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80521 USA; 2.Univ Corp Atmospher Res, COSMIC Project Off, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Sjoberg, Jeremiah P.,Birner, Thomas,Johnson, Richard H.. Intraseasonal to interannual variability of Kelvin wave momentum fluxes as derived from high-resolution radiosonde data[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(14). |
APA | Sjoberg, Jeremiah P.,Birner, Thomas,&Johnson, Richard H..(2017).Intraseasonal to interannual variability of Kelvin wave momentum fluxes as derived from high-resolution radiosonde data.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(14). |
MLA | Sjoberg, Jeremiah P.,et al."Intraseasonal to interannual variability of Kelvin wave momentum fluxes as derived from high-resolution radiosonde data".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.14(2017). |
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