Results 31 to 40 of about 30,800 (166)

Stratospheric warming influence on the mesosphere/lower thermosphere as seen by the extended CMAM [PDF]

Annales Geophysicae, 2014
The response of the upper mesosphere/lower thermosphere region to major sudden stratospheric warming (SSW) is examined employing temperature, winds, NOX and CO constituents from the extended Canadian Middle Atmosphere Model (CMAM) with continuous ...
M. G. Shepherd, S. R. Beagley, V. I. Fomichev   +2 more
doaj   +1 more source

The GFDL Global Atmospheric Chemistry‐Climate Model AM4.1: Model Description and Simulation Characteristics

Journal of Advances in Modeling Earth Systems, 2020
We describe the baseline model configuration and simulation characteristics of the Geophysical Fluid Dynamics Laboratory (GFDL)'s Atmosphere Model version 4.1 (AM4.1), which builds on developments at GFDL over 2013–2018 for coupled carbon‐chemistry ...
Larry W. Horowitz, Vaishali Naik, Fabien Paulot, Paul A. Ginoux, John P. Dunne, Jingqiu Mao, Jordan Schnell, Xi Chen, Jian He, Jasmin G. John, Meiyun Lin, Pu Lin, Sergey Malyshev, David Paynter, Elena Shevliakova, Ming Zhao   +15 more
doaj   +1 more source

Climate, Variability, and Climate Sensitivity of “Middle Atmosphere” Chemistry Configurations of the Community Earth System Model Version 2, Whole Atmosphere Community Climate Model Version 6 (CESM2(WACCM6))

Journal of Advances in Modeling Earth Systems, 2023
Simulating whole atmosphere dynamics, chemistry, and physics is computationally expensive. It can require high vertical resolution throughout the middle and upper atmosphere, as well as a comprehensive chemistry and aerosol scheme coupled to radiation ...
N. A. Davis, D. Visioni, R. R. Garcia, D. E. Kinnison, D. R. Marsh, M. Mills, J. H. Richter, S. Tilmes, C. G. Bardeen, A. Gettelman, A. A. Glanville, D. G. MacMartin, A. K. Smith, F. Vitt   +13 more
doaj   +1 more source

3-4 day Kelvin waves observed in the MLT region at 7.4o S, Brazil [PDF]

Geofísica Internacional, 2008
Meteor wind measurements obtained from São João do Cariri-PB (7.4° S, 36.5° W), Brazil, during 2005, have been used to examine the ultra-fast Kelvin wave characteristics in the mesopause and lower thermosphere region.
P. P. Batista, R. A. Buriti, A. F. Medeiros, E. de Oliveira Alves, L. Mota Lima, B. R. Clemesha, H. Takahashi   +6 more
doaj  

Modeling of the effect of internal gravity waves on upper atmospheric conditions during sudden stratospheric warming

Solar-Terrestrial Physics, 2016
We present results of modeling of the effect of internal gravity waves (IGW), excited in the region of development of a sudden stratospheric warming (SSW), on upper atmospheric conditions.
Vasilyev P.A., Karpov I.V., Kshevetskii S.P.   +2 more
doaj   +1 more source

Results of an interactively coupled atmospheric chemistry – general circulation model: Comparison with observations [PDF]

Annales Geophysicae, 2001
The coupled climate-chemistry model ECHAM4.L39(DLR)/CHEM is presented which enables a simultaneous treatment of meteorology and atmospheric chemistry and their feedbacks.
R. Hein, M. Dameris, C. Schnadt, C. Land, C. Land, V. Grewe, I. Köhler, M. Ponater, R. Sausen, B. B. Steil, J. Landgraf, J. Landgraf, C. Brühl   +12 more
doaj   +1 more source

Active upper-atmosphere chemistry and dynamics from polar circulation reversal on Titan [PDF]

Nature, 2012
Saturn's moon Titan has a nitrogen atmosphere comparable to Earth's, with a surface pressure of 1.4 bar. Numerical models reproduce the tropospheric conditions very well but have trouble explaining the observed middle-atmosphere temperatures, composition and winds.
Teanby, Nicholas, Irwin, Patrick, Nixon, Conor, de Kok, Remco, Vinatier, Sandrine, Coustenis, Athena, Sefton-Nash, Elliot, Calcutt, Simon, Flasar, F. Michael   +8 more
openaire   +3 more sources

MANGO: An optical network to study the dynamics of the Earth’s upper atmosphere

Journal of Geophysical Research: Space Physics, 2023
The Mid-latitude All-sky-imaging Network for Geophysical Observations (MANGO) employs a combination of two powerful optical techniques used to observe the dynamics of Earth’s upper atmosphere: wide-field imaging and high-resolution spectral interferometry.
A. N. Bhatt, B. J. Harding, J. J. Makela, L. Navarro, L. J. Lamarche, T. Valentic, E. A. Kendall, P. Venkatraman   +7 more
openaire   +1 more source

MAPPING GLOBAL OCEAN SURFACE ALBEDO FROM SATELLITE OBSERVATIONS: MODELS, ALGORITHMS, AND DATASETS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Ocean surface albedo (OSA) is one of the important parameters in surface radiation budget (SRB). It is usually considered as a controlling factor of the heat exchange among the atmosphere and ocean.
X. Li, X. Fan, H. Yan, A. Li, M. Wang, Y. Qu   +5 more
doaj   +1 more source

The effect of dynamics on the composition of Titan's upper atmosphere [PDF]

Geophysical Research Letters, 2002
Using a global time‐dependent general circulation model, we calculate the distribution of constituents in Titan's thermosphere resulting from transport caused by winds and molecular and eddy diffusion. Our simulations reveal that thermospheric winds effectively mix constituents in Titan's upper atmosphere.
I. C. F. Müller‐Wodarg, R. V. Yelle
openaire   +1 more source