Results 11 to 20 of about 746 (167)

Tropical tropopause layer [PDF]

Reviews of Geophysics, 2009
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
S. Fueglistaler, A. E. Dessler, T. J. Dunkerton, I. Folkins, Q. Fu, P. W. Mote   +5 more
openaire   +3 more sources

Maintenance of tropical tropopause layer cirrus [PDF]

Journal of Geophysical Research: Atmospheres, 2010
A two‐dimensional cloud resolving model with explicit bin microphysics is used to study the maintenance of tropical tropopause layer (TTL) cirrus. Numerical simulations using this model show that a TTL cirrus with a maximum radiative heating rate of 3 K/day is able to self‐maintain for as long as 2 days if it contains ice crystals whose initial mean ...
T. P. Dinh, D. R. Durran, T. P. Ackerman
openaire   +3 more sources

Radiation balance of the tropical tropopause layer [PDF]

Journal of Geophysical Research: Atmospheres, 2004
The radiation balance of the tropical tropopause layer (TTL) is examined using several different radiation codes with standard profiles compiled from observations in the tropics assuming clear sky conditions. These codes include detailed radiative transfer models and simplified codes for global climate models.
Gettelman, Andrew, Forster, Piers M. de F., Masatomo, Fujiwara, Fu, Qiang, Vomel, Holger, Gohar, Laila K., Johanson, Celeste, Ammerman, Marie   +7 more
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Recent variability of the tropical tropopause inversion layer [PDF]

Geophysical Research Letters, 2013
The recent variability of the tropopause temperature and the tropopause inversion layer (TIL) are investigated with Global Positioning System Radio Occultation data and simulations with the National Center for Atmospheric Research's Whole Atmosphere Community Climate Model (WACCM).
Wang, W., Matthes, K., Schmidt, T., Neef, L.   +3 more
openaire   +7 more sources

The CO2 tracer clock for the Tropical Tropopause Layer [PDF]

Atmospheric Chemistry and Physics, 2007
Observations of CO2 were made in the upper troposphere and lower stratosphere in the deep tropics in order to determine the patterns of large-scale vertical transport and age of air in the Tropical Tropopause Layer (TTL).
R.-S. Gao, E. L. Atlas, T. P. Bui, A. Bright, D. M. Matross, D. J. Curran, E. W. Gottlieb, V. Y. Chow, L. Pfister, T. J. Conway, B. C. Daube, R. Jiménez, S. Park, C. H. Twohy, S. C. Wofsy   +14 more
doaj   +6 more sources

A model of HDO in the tropical tropopause layer [PDF]

Atmospheric Chemistry and Physics, 2003
Any theory of water vapor in the tropical tropopause layer (TTL) must explain both the abundance and isotopic composition of water there. In previous papers, we presented a model of the TTL that simulated the abundance of water vapor as well as the ...
A. E. Dessler, S. C. Sherwood
doaj   +6 more sources

The effect of deep, tropical convection on the tropical tropopause layer [PDF]

Journal of Geophysical Research: Atmospheres, 2002
There is evidence that most detrainment from tropical convection occurs below ∼14 km, about 2 km below the tropopause. On the other hand, it is also generally accepted that convection does occasionally reach the altitude of the tropopause. The question is whether the relatively infrequent penetrations above 14 km are sufficient to influence the ...
Andrew Dessler
openaire   +3 more sources

A simple model to assess the impact of gravity waves on ice-crystal populations in the tropical tropopause layer [PDF]

Atmospheric Chemistry and Physics, 2023
The role of gravity waves on microphysics of tropical cirrus clouds and air-parcel dehydration was studied using the combination of Lagrangian observations of temperature fluctuations and a 1.5D model. High-frequency measurements during isopycnal balloon
M. Corcos, A. Hertzog, R. Plougonven, A. Podglajen   +3 more
doaj   +1 more source

Airborne measurements of organic bromine compounds in the Pacific tropical tropopause layer. [PDF]

Proc Natl Acad Sci U S A, 2015
Navarro MA, Atlas EL, Saiz-Lopez A, Rodriguez-Lloveras X, Kinnison DE, Lamarque JF, Tilmes S, Filus M, Harris NR, Meneguz E, Ashfold MJ, Manning AJ, Cuevas CA, Schauffler SM, Donets V.   +14 more
europepmc   +2 more sources

Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor

Atmosphere, 2021
Stratospheric water vapor (SWV) changes play an important role in regulating global climate change, and its variations are controlled by tropopause temperature.
Jinpeng Lu, Fei Xie, Hongying Tian, Jiali Luo   +3 more
doaj   +1 more source