Equivalent-barotropic definition of tropospheric mean temperature
文献类型：期刊论文
| 作者 | Sun, C |
| 刊名 | JOURNAL OF THE ATMOSPHERIC SCIENCES
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 62期号:9页码:3172-3192 |
| 关键词 | Antarctic Circumpolar Current Gravest Empirical Mode Disturbances Circulation |
| ISSN号 | 0022-4928 |
| 文献子类 | Article |
| 英文摘要 | An equivalent-barotropic (EB) description of the tropospheric temperature field is derived from the geostrophic empirical mode (GEM) in the form of a scalar function Gamma(p, phi), where p is pressure and phi is 300-850-mb thickness. Baroclinic parameter phi plays the role of latitude at each longitudinal section. Compared with traditional Eulerian-mean methods, GEM defines a mean field in baroclinic streamfunction space with a time scale much longer than synoptic variability. It prompts an EB concept that is only based on a baroclinic field.; An equivalent-barotropic (EB) description of the tropospheric temperature field is derived from the geostrophic empirical mode (GEM) in the form of a scalar function Gamma(p, phi), where p is pressure and phi is 300-850-mb thickness. Baroclinic parameter phi plays the role of latitude at each longitudinal section. Compared with traditional Eulerian-mean methods, GEM defines a mean field in baroclinic streamfunction space with a time scale much longer than synoptic variability. It prompts an EB concept that is only based on a baroclinic field. Monthly GEM fields are diagnosed from NCEP-NCAR reanalysis data and account for more than 90% of the tropospheric thermal variance. The circumglobal composite of GEM fields exhibits seasonal, zonal, and hemispheric asymmetries, with larger rms errors occurring in winter and in the Northern Hemisphere (NH). Zonally asymmetric features and planetary deviation from EB are seen in the NH winter GEM. Reconstruction of synoptic sections and correlation analysis reveal that the tropospheric temperature field is EB at the leading order and has a 1-day phase lag behind barotropic variations in extratropical regions. |
| 学科主题 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000232275300010 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2453]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, C. Equivalent-barotropic definition of tropospheric mean temperature[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2005,62(9):3172-3192. |
| APA | Sun, C.(2005).Equivalent-barotropic definition of tropospheric mean temperature.JOURNAL OF THE ATMOSPHERIC SCIENCES,62(9),3172-3192. |
| MLA | Sun, C."Equivalent-barotropic definition of tropospheric mean temperature".JOURNAL OF THE ATMOSPHERIC SCIENCES 62.9(2005):3172-3192. |
入库方式： OAI收割
来源：海洋研究所
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