Zobrazeno 1 - 10
of 55
pro vyhledávání: '"David A. Ortland"'
Publikováno v:
Journal of Geophysical Research: Atmospheres. 127
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5137aa5fcef5d34ce3e956c4faf49dc9
https://doi.org/10.1029/2021jd036007
https://doi.org/10.1029/2021jd036007
Autor:
David A. Ortland
Publikováno v:
Journal of Geophysical Research: Atmospheres. 122:3754-3785
Satellites provide a global view of the structure in the fields that they measure. In the mesosphere and lower thermosphere, the dominant features in these fields at low zonal wave number are contained in the zonal mean, quasi-stationary planetary wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8023e62aa8cddff2c47ad1e813e20d6
https://doi.org/10.1002/2016jd025573
https://doi.org/10.1002/2016jd025573
Autor:
Scott Palo, Vu Nguyen, David E. Siskind, Ruth S. Lieberman, David A. Ortland, Jeffrey M. Forbes
Publikováno v:
Journal of Geophysical Research: Atmospheres. 121:7762-7780
Theory and past observations have provided evidence that atmospheric tides and other global-scale waves interact nonlinearly to produce additional secondary waves throughout the space-atmosphere interaction region. However, few studies have investiga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27cedb9dbade88bea808f753c5f16773
https://doi.org/10.1002/2016jd024794
https://doi.org/10.1002/2016jd024794
Publikováno v:
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 1997, 15 (9), pp.1187-1197
Annales Geophysicae, Vol 15, Pp 1187-1197 (1997)
Annales Geophysicae, Vol 15, Iss 9, Pp 1187-1197 (0000)
Annales Geophysicae, European Geosciences Union, 1997, 15 (9), pp.1187-1197
Annales Geophysicae, Vol 15, Pp 1187-1197 (1997)
Annales Geophysicae, Vol 15, Iss 9, Pp 1187-1197 (0000)
Wind and temperature observations in the mesosphere and lower thermosphere (MLT) from the Upper Atmosphere Research Satellite (UARS) reveal strong seasonal variations of tides, a dominant component of the MLT dynamics. Simulations with the Spectral m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c56ad9dcb1975a20a8f76c5ee396d34c
https://www.ann-geophys.net/15/1187/1997/
https://www.ann-geophys.net/15/1187/1997/
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 136:126-133
We present direct observations of the semidiurnal lunar tide zonal winds at 260 km and 350 km during low solar activity in 2007–2008, and 2010–2011. The migrating semidiurnal lunar tide, or M2, is a global feature with amplitudes of about 10 m s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37106f2b9f8bf04bb91b5b84ada16749
https://doi.org/10.1016/j.jastp.2015.05.019
https://doi.org/10.1016/j.jastp.2015.05.019
Using an idealized model framework with high-frequency tropical latent heating variability derived from global satellite observations of precipitation and clouds, the authors examine the properties and effects of gravity waves in the lower stratosphe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83993f427e04245eb3c707d29f402724
https://europepmc.org/articles/PMC5786383/
https://europepmc.org/articles/PMC5786383/
Autor:
M. Joan Alexander, David A. Ortland
Publikováno v:
Journal of the Atmospheric Sciences. 71:1305-1322
Latent heating estimates derived from rainfall observations are used to construct model experiments that isolate equatorial waves forced by tropical convection from midlatitude synoptic-scale waves. These experiments are used to demonstrate that quas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f90a4f0deb8a0f1411e84407cd8977a9
https://doi.org/10.1175/jas-d-13-0100.1
https://doi.org/10.1175/jas-d-13-0100.1
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. :61-67
Using TIMED data as the lower boundary condition at 95 km altitude for both the migrating and nonmigrating tide source, we run the NCAR Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) to simulate the mesospheric and lower t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c7ebf4338c865a072d808cbb345cb69
https://doi.org/10.1016/j.jastp.2012.02.009
https://doi.org/10.1016/j.jastp.2012.02.009
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 73:2482-2502
Based on TIDI mesospheric wind observations, we analyzed the semidiurnal tide westward zonal wavenumber 1 and 2 (SW1 and SW2) component seasonal, inter-annual variations, and possible sudden stratospheric warming (SSW) related changes. Major findings
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8acaa0b1f2249c753659d26c5bdebabb
https://doi.org/10.1016/j.jastp.2011.08.007
https://doi.org/10.1016/j.jastp.2011.08.007
Publikováno v:
Journal of the Atmospheric Sciences. 68:2321-2342
Equatorial atmospheric waves in the upper troposphere and lower stratosphere (UTLS), excited by latent heating, are investigated by using a global spectral model. The latent heating profiles are derived from the 3-hourly Tropical Rainfall Measuring M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23400fb8e25d3a70ccb60c0965fc1704
https://doi.org/10.1175/2011jas3647.1
https://doi.org/10.1175/2011jas3647.1