TTL climatology
نویسندگان
چکیده
Long-term climatology of air mass transport through the Tropical Tropopause Layer (TTL) during NH winter K. Krüger, S. Tegtmeier, and M. Rex IFM-GEOMAR, Kiel, Germany University of Toronto, Toronto, Canada Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany Received: 11 September 2007 – Accepted: 21 September 2007 – Published: 28 September 2007 Correspondence to: K. Krüger ([email protected])
منابع مشابه
A Climatology of the Tropical Tropopause Layer
The tropical tropopause layer (TTL) is a transition region between the troposphere and the stratosphere. In this study the vertical extent of the TTL is diagnosed from radiosonde and ozonesonde profiles in the tropics and a climatology of this layer is presented. The radiative balance in the TTL is also characterized. The TTL is locally defined as extending from the level of the lapse rate mini...
متن کاملLong-term climatology of air mass transport through the Tropical Tropopause Layer (TTL) during NH winter
A long-term climatology of air mass transport through the tropical tropopause layer (TTL) is presented, covering the period from 1962–2005. The transport through the TTL is calculated with a Lagrangian approach using radiative heating rates as vertical velocities in an isentropic trajectory model. We demonstrate the improved performance of such an approach compared to previous studies using ver...
متن کاملInsights into Tropical Tropopause Layer processes using global models
[1] The climatology of the Tropical Tropopause Layer (TTL) in two state-of-the-art general circulation models is compared with observations. Results indicate that global models are able to resolve key features of the TTL, including the mean state and the variability of temperature, ozone, clouds, and thermal structure. The agreement indicates that large-scale processes, and the large-scale effe...
متن کاملUntangling the annual cycle of the tropical tropopause layer with an idealized moist model
The processes regulating the climatology and annual cycle of the tropical tropopause layer (TTL) and cold point are not fully understood. Three main drivers have been identified: planetary scale equatorial waves excited by tropical convection, planetary scale extratropical waves associated with the deep Brewer-Dobson Circulation, and synoptic scale waves associated with the midlatitude storm tr...
متن کاملUntangling the annual cycle of the tropical tropopause layer with an idealized moist model: Tropical versus extratropical control
The processes regulating the climatology and annual cycle of the tropical tropopause layer (TTL) and cold point are not fully understood. Three main drivers have been identified: planetary scale equatorial waves excited by tropical convection, planetary scale extratropical waves associated with the deep Brewer-Dobson Circulation, and synoptic scale waves associated with the midlatitude storm tr...
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