Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-793-2017 |
Tropical temperature variability and Kelvin-wave activity in the UTLS from GPS RO measurements | |
Scherllin-Pirscher, Barbara1,2,3; Randel, William J.4; Kim, Joowan4,5 | |
2017-01-18 | |
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:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; USA; South Korea |
英文摘要 | Tropical temperature variability over 10-30 km and associated Kelvin-wave activity are investigated using GPS radio occultation (RO) data from January 2002 to December 2014. RO data are a powerful tool for quantifying tropical temperature oscillations with short vertical wavelengths due to their high vertical resolution and high accuracy and precision. Gridded temperatures from GPS RO show the strongest variability in the tropical tropopause region (on average 3K(2)). Large-scale zonal variability is dominated by transient sub-seasonal waves (2K(2)), and about half of sub-seasonal variance is explained by eastward-traveling Kelvin waves with periods of 4 to 30 days (1K(2)). Quasi-stationary waves associated with the annual cycle and interannual variability contribute about a third (1K(2)) to total resolved zonal variance. Sub-seasonal waves, including Kelvin waves, are highly transient in time. Above 20 km, Kelvin waves are strongly modulated by the quasi-biennial oscillation (QBO) in stratospheric zonal winds, with enhanced wave activity during the westerly shear phase of the QBO. In the tropical tropopause region, however, peaks of Kelvin-wave activity are irregularly distributed in time. Several peaks coincide with maxima of zonal variance in tropospheric deep convection, but other episodes are not evidently related. Further investigations of convective forcing and atmospheric background conditions are needed to better understand variability near the tropopause. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394593900002 |
WOS关键词 | RADIO OCCULTATION MEASUREMENTS ; STRATOSPHERE-TROPOSPHERE EXCHANGE ; COUPLED EQUATORIAL WAVES ; WATER-VAPOR ; EARTHS ATMOSPHERE ; TROPOPAUSE LAYER ; GRAVITY-WAVES ; ZONAL WIND ; SAC-C ; CHAMP |
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/29505 |
专题 | 地球科学 |
作者单位 | 1.Graz Univ, Wagener Ctr Climate & Global Change WEGC, Graz, Austria; 2.Graz Univ, IGAM, IP, Graz, Austria; 3.Zent Anstalt Meteorol & Geodynam, Vienna, Austria; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 5.Kongju Natl Univ, Dept Atmospher Sci, Gongju, South Korea |
推荐引用方式 GB/T 7714 | Scherllin-Pirscher, Barbara,Randel, William J.,Kim, Joowan. Tropical temperature variability and Kelvin-wave activity in the UTLS from GPS RO measurements[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Scherllin-Pirscher, Barbara,Randel, William J.,&Kim, Joowan.(2017).Tropical temperature variability and Kelvin-wave activity in the UTLS from GPS RO measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Scherllin-Pirscher, Barbara,et al."Tropical temperature variability and Kelvin-wave activity in the UTLS from GPS RO measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
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