| On Recent Interannual Variability of the Arctic Winter Mesosphere: Implications for Tracer Descent |
2007 |
6 pages |
| Authors:
David E. Siskind; Stephen D. Eckermann; Lawrence Coy; John P. McCormack; Cora E. Randall; NAVAL RESEARCH LAB WASHINGTON DC
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 | Observations from the Sounding of the Atmosphere with Broadband Emission Radiometry (SABER) experiment on the NASA/Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite show an unusual vertical displacement of the winter Arctic stratopause in 2006 with zonal mean temperatures at 0.01 hPa (~78 km) exceeding 250 K. By contrast, at the conventional stratopause location near 0.7 hPa (~50 km), temperatures were unusually cold. Simulations with the NOGAPS-ALPHA model suggest that ... |
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| NOGAPS-ALPHA Simulations of the 2002 Southern Hemisphere Stratospheric Major Warming |
2006 |
22 pages |
| Authors:
Douglas R. Allen; Lawrence Coy; Stephen D. Eckermann; John P. McCormack; Gloria L. Manney; Timothy F. Hogan; Young-Joon Kim; NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV
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| A high-altitude version of the Navy Operational Global Atmospheric Prediction System (NOGAPS) spectral forecast model is used to simulate the unusual September 2002 Southern Hemisphere stratospheric major warming. Designated as NOGAPS-Advanced Level Physics and High Altitude (NOGAPS-ALPHA), this model extends from the surface to 0.005 hPa (~85 km altitude) and includes modifications to multiple components of the operational NOGAPS system, including a new radiative heating scheme, middle-atmosphere gravity wave drag ... |
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| Remote Sounding of Atmospheric Gravity Waves with Satellite Limb and Nadir Techniques |
06 JUL 2005 |
10 pages |
| Authors:
Dong L. Wu; Peter Preusse; Stephen D. Eckermann; Jonath H. Jiang; Manuel de la Torre Juarez; Lawrence Coy; Ding Y. Wang; CALIFORNIA INST OF TECHNOLOGY PASADENA JET PROPULSION LAB
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| Recent advances in satellite techniques hold great potential for mapping global gravity wave (GW) processes at various altitudes. Poor understanding of small-scale GWs has been a major limitation to numerical climate and weather models for making reliable forecasts. Observations of short-scale features have important implication for validating and improving future high-resolution numerical models. This paper summarizes recent GW observations and sensitivities from several satellite instruments, including MLS, AMSU-A, AIRS, GPS, ... |
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| The NRL Mountain Wave Forecast Model (MWFM) [Preprint] |
17 JUN 2004 |
21 pages |
| Authors:
Stephen D. Eckermann; Jun Ma; Dave Broutman; NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH
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| The Department of Defense has a large and increasing investment in high-altitude long-endurance (HALE) reconnaissance aircraft. HALE aircraft have lightweight broad-winged designs, enabling them to reach stratospheric altitudes. These properties make them both aerodynamically and structurally vulnerable to any severe turbulence they intercept at altitude. Since the stratosphere is very dry and thus has no in situ cloud-related sources of turbulence from severe weather, only clear-air turbulence (CAT) can occur. ... |
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| NOGAPS-ALPHA: A Prototype High-Altitude Global NWP Model |
JUN 2004 |
24 pages |
| Authors:
Stephen D. Eckermann; John P. McCormack; Lawrence Coy; Douglas Allen; Tim Hogan; Young-Joon Kim; NAVAL RESEARCH LAB WASHINGTON DC
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| The Navy Operational Global Atmospheric Prediction System (NOGAPS) is the Department of Defense's (DoD's) high-resolution global numerical weather prediction (NWP) system. Its development and operation is a joint activity of the Naval Research Laboratory (NRL) and the Navy's Fleet Numerical Meteorology and Oceanography Center (FNMOC). NOGAPS is a complete operational forecasting system that includes data quality control, tropical cyclone bogusing, operational data assimilation, balanced initialization, and a global forecast model. ... |
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