Results 51 to 60 of about 746 (167)

Transport and freeze‐drying in the tropical tropopause layer [PDF]

Journal of Geophysical Research: Atmospheres, 2004
We use a Lagrangian, one‐dimensional cloud model to simulate ice cloud formation and dehydration along trajectories in the tropical tropopause layer (TTL). Time‐height curtains of temperature along the trajectory paths are extracted from meteorological analyses.
Eric Jensen, Leonhard Pfister
openaire   +1 more source

Dust Decline Amplifies High‐Cloud Ice‐to‐Liquid Transition and Buffers the Radiative Feedback Under Warming

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract The response of the cloud phase to global warming is a critical yet poorly constrained component of Earth's climate sensitivity. While rising temperatures drive a thermodynamic transition from ice to liquid clouds, the role of ice‐nucleating particles in modulating this shift remains underexplored.
Yang Wang, Tianrong Chai, Jiming Li, Lu Feng, Jialing Jian, Jianping Huang, Greg M. McFarquhar   +6 more
wiley   +1 more source

Shift in cold-point tropopause trends derived from radiosonde, satellite and reanalysis data [PDF]

Atmospheric Chemistry and Physics
The tropical tropopause layer is the transition region between the well-mixed convective troposphere and the radiatively controlled stratosphere and plays a crucial role in air mass transport between these layers. In this paper, we present updated trends
M. Zolghadrshojaee, S. Tegtmeier, S. M. Davis, R. Pilch Kedzierski, R. Pilch Kedzierski, L. Haimberger   +5 more
doaj   +1 more source

Bromine partitioning in the tropical tropopause layer: implications for stratospheric injection [PDF]

Atmospheric Chemistry and Physics, 2014
Very short-lived (VSL) bromocarbons are produced at a prodigious rate by ocean biology and these source compounds (SGVSL), together with their inorganic degradation products (PGVSL), are lofted by vigorous convection to the tropical tropopause layer (TTL)
R. P. Fernandez, R. J. Salawitch, D. E. Kinnison, J.-F. Lamarque, A. Saiz-Lopez   +4 more
doaj   +1 more source

Insights into Tropical Tropopause Layer processes using global models [PDF]

Journal of Geophysical Research: Atmospheres, 2007
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.
A. Gettelman, T. Birner
openaire   +1 more source

When Thunderstorms Reach the Stratosphere: Why Storm Structure May Matter for Climate

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract Deep convection that overshoots the tropopause provides one of the fastest pathways for exchanging air between the troposphere and the stratosphere. Using extensive in situ observations from the dynamics and chemistry of the summer stratosphere (DCOTSS) campaign, Shepherd et al.
Francesco Cairo
wiley   +1 more source

Climatic Higher‐Order Balanced Winds Beyond Geostrophic and Gradient Wind Fields

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract We present a novel approach to derive three‐dimensional Climatic Higher‐Order Balanced (CHOB) wind fields from thermodynamic state variables in the free troposphere and stratosphere. The CHOB method is developed for monthly synoptic‐scale wind field estimation, utilizing commonly used balanced winds (geostrophic and gradient wind) enhanced by ...
I. Nimac, J. Unegg, J. Danzer
wiley   +1 more source

Impacts of the Lower Stratosphere on the Development of Intense Tropical Cyclones

Atmosphere, 2017
This study examines potential impacts of the lower stratosphere on the development and the inner-core structure of intense tropical cyclones (TCs).
Zachary Moon, Chanh Kieu
doaj   +1 more source

Impact of tropical land convection on the water vapour budget in the tropical tropopause layer [PDF]

Atmospheric Chemistry and Physics, 2014
The tropical deep overshooting convection is known to be most intense above continental areas such as South America, Africa, and the maritime continent. However, its impact on the tropical tropopause layer (TTL) at global scale remains debated.
F. Carminati, P. Ricaud, J.-P. Pommereau, E. Rivière, S. Khaykin, J.-L. Attié, J. Warner   +6 more
doaj   +1 more source

Temperature Fields in the Tropical Tropopause Transition Layer

Journal of Climate, 2004
Abstract There has been increasing recognition of the role of the tropical tropopause layer (TTL) in determining stratospheric water vapor concentrations—the TTL being a layer of transition between air showing tropospheric properties below and stratospheric properties above. This study investigates the spatial structure of temperatures in the TTL.
Xue Long Zhou, Marvin A. Geller, Minghua Zhang   +2 more
openaire   +1 more source