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- S. Fueglistaler
- Department of Applied Mathematics and Theoretical Physics University of Cambridge Cambridge UK
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- A. E. Dessler
- Department of Atmospheric Sciences Texas A&M University College Station Texas USA
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- T. J. Dunkerton
- NorthWest Research Associates Redmond Washington USA
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- I. Folkins
- Department of Physics and Atmospheric Science Dalhousie University Halifax, Nova Scotia Canada
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- Q. Fu
- Department of Atmospheric Sciences University of Washington Seattle Washington USA
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- P. W. Mote
- NorthWest Research Associates Redmond Washington USA
書誌事項
- 公開日
- 2009-02-17
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2008rg000267
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>Observations of temperature, winds, and atmospheric trace gases suggest that the transition from troposphere to stratosphere occurs in a layer, rather than at a sharp “tropopause.” In the tropics, this layer is often called the “tropical tropopause layer” (TTL). We present an overview of observations in the TTL and discuss the radiative, dynamical, and chemical processes that lead to its time‐varying, three‐dimensional structure. We present a synthesis definition with a bottom at 150 hPa, 355 K, 14 km (pressure, potential temperature, and altitude) and a top at 70 hPa, 425 K, 18.5 km. Laterally, the TTL is bounded by the position of the subtropical jets. We highlight recent progress in understanding of the TTL but emphasize that a number of processes, notably deep, possibly overshooting convection, remain not well understood. The TTL acts in many ways as a “gate” to the stratosphere, and understanding all relevant processes is of great importance for reliable predictions of future stratospheric ozone and climate.</jats:p>
収録刊行物
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- Reviews of Geophysics
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Reviews of Geophysics 47 (1), RG1004-, 2009-02-17
American Geophysical Union (AGU)
