Results 91 to 100 of about 56,503 (208)

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 ...
openaire   +1 more source

Influence of Deep Convection on Cirrus and Water Vapor Concentration in the Upper Troposphere and Lower Stratosphere [PDF]

It is well known that stratospheric humidity is primarily controlled by freeze drying (ice crystal growth and sedimentation) of air ascending across the cold tropical tropopause.
Jensen, Eric, Ueyama, Rei
core   +1 more source

The impact of resolution on the adjustment and decadal variability of the Atlantic Meridional Overturning Circulation in a coupled climate model [PDF]

, 2012
Variations in the Atlantic Meridional Overturning Circulation (MOC) exert an important influence on climate, particularly on decadal time scales. Simulation of the MOC in coupled climate models is compromised, to a degree that is unknown, by their lack ...
Hodson, Daniel L. R., Sutton, Rowan T.
core   +1 more source

Longwave Radiative Feedback Due To Stratiform and Anvil Clouds

Geophysical Research Letters
Studies have implicated the importance of longwave (LW) cloud‐radiative forcing (CRF) in facilitating or accelerating the upscale development of tropical moist convection. While different cloud types are known to have distinct CRF, their individual roles
Emily Luschen, James Ruppert
doaj   +1 more source

Wind Speed Control of Tropical Orographic Convection

Journal of the Atmospheric Sciences, 2014
Abstract This study compares observations from the Dominica Experiment (DOMEX) field campaign with 3D and 2D Weather Research and Forecasting Model (WRF) simulations to understand how ambient upstream wind speed controls the transition from thermally to mechanically forced moist orographic convection.
Ronald B. Smith, Alison D. Nugent, Justin R. Minder   +2 more
openaire   +1 more source

Convective injection and photochemical decay of peroxides in the tropical upper troposphere: Methyl iodide as a tracer of marine convection [PDF]

, 1999
The convective injection and subsequent fate of the peroxides H2O2 and CH3OOH in the upper troposphere is investigated using aircraft observations from the NASA Pacific Exploratory Mission-Tropics A (PEM-Tropics A) over the South Pacific up to 12 km ...
Blake, DR, Cohan, DS, Heikes, BG, Jacob, DJ, Schultz, MG   +4 more
core  

The Relative Humidity in an Isentropic Advection–Condensation Model: Limited Poleward Influence and Properties of Subtropical Minima [PDF]

, 2011
An idealized model of advection and condensation of water vapor is considered as a representation of processes influencing the humidity distribution along isentropic surfaces in the free troposphere.
Boer, Bolton, Couhert, Derbyshire, Dessler, Frierson, Frierson, Galewsky, Held, Held, Hurley, Hurley, Martin S. Singh, Mitchell, Nicolas Lamquin, O’Gorman, O’Gorman, O’Gorman, Paul A. O’Gorman, Pierrehumbert, Pierrehumbert, Pierrehumbert, Salathé, Schneider, Schneider, Schneider, Schneider, Seidel, Sherwood, Sherwood, Sherwood, Smith, Sukhatme, Tapio Schneider, Thomson, Uppala, Wright, Yang   +37 more
core   +1 more source

A Moist Physics Parameterization Based on Deep Learning

Journal of Advances in Modeling Earth Systems, 2020
Current moist physics parameterization schemes in general circulation models (GCMs) are the main source of biases in simulated precipitation and atmospheric circulation.
Yilun Han, Guang J. Zhang, Xiaomeng Huang, Yong Wang   +3 more
doaj   +1 more source

Comparison of stochastic parameterisation approaches in a single-column model [PDF]

, 2009
We discuss and test the potential usefulness of single-column models (SCMs) for the testing of stochastic physics schemes that have been proposed for use in general circulation models (GCMs).
Ball, Michael, Plant, Robert Stephen
core  

Validation of the Harvard Lyman-α in situ water vapor instrument: Implications for the mechanisms that control stratospheric water vapor [PDF]

, 2009
Building on previously published details of the laboratory calibrations of the Harvard Lyman-α photofragment fluorescence hygrometer (HWV) on the NASA ER-2 and WB-57 aircraft, we describe here the validation process for HWV, which includes laboratory ...
Anderson, J. G., Hanisco, T. F., Hintsa, E. J., Moyer, E. J., Pittman, J. V., Sargent, M. R., Sayres, D. S., Smith, J. B., Spackman, J. R., St. Clair, J. M., Weinstock, E. M.   +10 more
core   +1 more source