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Geotail And Lfm Comparisons Of Plasma Sheet Climatology: 2. Flow Variability, T. B. Guild, Harlan E. Spence, E. L. Kepko, V. Merkin, J. G. Lyon, M. Wiltberger, C. C. Goodrich
Geotail And Lfm Comparisons Of Plasma Sheet Climatology: 2. Flow Variability, T. B. Guild, Harlan E. Spence, E. L. Kepko, V. Merkin, J. G. Lyon, M. Wiltberger, C. C. Goodrich
Physics & Astronomy
[1] We characterize the variability of central plasma sheet bulk flows with a 6-year Geotail data set and a 2-month Lyon-Fedder-Mobarry (LFM) global MHD simulation at two spatial resolutions. Comparing long databases of observed and simulated parameters enable rigorous statistical tests of the model's ability to predict plasma sheet properties during routine driving conditions and represent a new method of global MHD validation. In this study, we use probability density functions (PDFs) to compare the statistics of plasma sheet velocities in the Geotail observations with those in the LFM simulations. We find that the low-resolution model grossly underestimates the occurrence …
Geotail And Lfm Comparisons Of Plasma Sheet Climatology: 1. Average Values, T. B. Guild, Harlan E. Spence, E. L. Kepko, V. Merkin, J. G. Lyon, M. Wiltberger, C. C. Goodrich
Geotail And Lfm Comparisons Of Plasma Sheet Climatology: 1. Average Values, T. B. Guild, Harlan E. Spence, E. L. Kepko, V. Merkin, J. G. Lyon, M. Wiltberger, C. C. Goodrich
Physics & Astronomy
[1] We compare the statistics of central plasma sheet properties from 6 years of Geotail observations with 2 months of Lyon-Fedder-Mobarry (LFM) global MHD simulations. This statistical validation effort represents an inherently new method of systematically characterizing and quantifying global MHD model performance. For our comparison, we identify the central plasma sheet in the observations and simulation by identical criteria and select the simulation interval to ensure statistically similar distributions of solar wind conditions in both studies. After verifying our plasma sheet selection by inspecting the magnetic signatures of both studies, we compare the resultant number densities, thermal pressures, thermal …
Climatology Of Mesopause Region Temperature, Zonal Wind, And Meridional Wind Over Fort Collins,Colorado (41°N, 105°W), And Comparison With Model Simulations, Tao Yuan, C. Y. She, D. A. Krueger, F. Sassi, R. Garcia, R. G. Roble, H. Liu, H. Schmidt, Steven Reising
Climatology Of Mesopause Region Temperature, Zonal Wind, And Meridional Wind Over Fort Collins,Colorado (41°N, 105°W), And Comparison With Model Simulations, Tao Yuan, C. Y. She, D. A. Krueger, F. Sassi, R. Garcia, R. G. Roble, H. Liu, H. Schmidt, Steven Reising
All Physics Faculty Publications
Between May 2002 and April 2006, many continuous observations of mesopause region temperature and horizontal wind, each lasting longer than 24 h (termed full-diurnal-cycle observations), were completed at the Colorado State University Na Lidar Facility in Fort Collins, Colorado (41°N, 105°W). The combined data set consists of 120 full-diurnal-cycle observations binned on a monthly basis, with a minimum of 7 cycles in April and a maximum of 18 cycles in August. Each monthly data set was analyzed to deduce mean values and tidal period perturbations. After removal of tidal signals, monthly mean values are used for the study of seasonal …