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Showing 1 to 20 of 49 for “"midlatitude"”.
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Midlatitude sporadic-E layers
… is the partially transparent echo from midlatitude sporadic-E layers as recorded by ionosondes; this is the range of frequencies between the blanketing frequency and the maximum frequency. One interpretation is that it is a partial reflection at the steep gradients of electron density …
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Numerical Simulations of a Midlatitude Squall Line
… replicate the observed structure of a typical midlatitude squall line. The basic simulations described in this report were made using common temperature and moisture profiles in the vertical, and emphasis was placed on varying the microphysics and the vertical wind shear. The temperature and …
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Midlatitude Storm Track Response to Increased Greenhouse Warming
… the precipitation and hydrological cycle in midlatitudes. The changes in the location and amplitude of the storm tracks in response to global warming will have significant impacts on the poleward transport of heat, momentum and moisture and on the hydrological cycle. Recent studies have …
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Midlatitude Mesoscale Convective Complex precipitation cycles and structures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1983.
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Midlatitude D Region Variations Measured from Broadband Radio Atmospherics
… the time scales, magnitudes and sources for the midlatitude nighttime <italic>D</italic> region variations, we analyzed the sferic data of July and August 2005, and extracted both the height and sharpness of the <italic>D</italic> region electron density profile. The heights show large temporal …
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Moist Baroclinic Instability and Macroturbulence of the Midlatitude Atmosphere
… of phase greatly enrich the dynamics of the midlatitude atmosphere and challenge us to extend our theories of baroclinic instability and macroturbulence beyond dry adiabatic dynamics. Two specific phenomena in which latent heating plays a key role and that are poorly understood form the …
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Approaching Arctic-midlatitude dynamics from a two-way feedback perspective
Arctic variability and the variability of the midlatitude circulation are closely intertwined. Although these connections are interrelated and bi-directional, and occur on a variety of timescales, they are not often studied together. Modeling studies generally focus on a single direction of …
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Far-flung influences on midlatitude weather and climate: The stratospheric pathway
… influence, and enhance the predictability of, midlatitude winter weather on timescales of weeks to months – including the likelihood of weather extremes and associated impacts. This thesis first explores the response of the polar vortex to projected Arctic climate change, in terms of both the …
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Fabry-Perot Observations of Midlatitude Neutral Winds and Atmospheric Gravity Wave Activity
<p>The mesosphere and lower thermosphere displays a wide range of dynamical phenomena resulting in a complex and variable regions. Governed primarily by fluid dynamics, the motion of the upper atmosphere is modulated by a number of atmospheric waves propagating upward from various sources in the …
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Ionospheric Disturbances: Midlatitude Pi2 Magnetospheric ULF Pulsations and Medium Scale Traveling Ionospheric Disturbances
… ionospheric disturbances (MSTIDs) at both midlatitudes and high latitudes. Consistent with prior studies, the climatological MSTID population in both latitudinal regions was found to peak in the fall and winter and have a dominant equatorward propagation direction. Prior studies suggested …
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Midlatitude thermospheric wind and temperature: networked Fabry-Perot interferometer observations and radiative transfer modeling
This dissertation presents studies of the midlatitude and low-latitude thermosphere, primarily using networks of Fabry-Perot interferometers (FPIs). First, we describe an algorithm which estimates thermospheric line-of-sight wind and temperature from raw FPI data. This new algorithm has the …
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Analysis Of A Parallel Stratiform Mesoscale Convective System During The Midlatitude Continental Convective Clouds Experiment
<p>During the Midlatitude Continental Convective Clouds Experiment, a PS MCS traversed north-central Oklahoma on 11 May 2011. In-situ measurements of the stratiform precipitation region were obtained from six horizontal flight legs flow by the University of North Dakota Citation II Weather Research …
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A Climatology of the Structure, Frequency, and Propagation of Midlatitude Cyclones that Affect North Carolina
The seasonal and interannual variability of midlatitude cyclone structure, frequency, and propagation was studied based on composites of precipitation over North Carolina. This analysis showed significant changes in the structure, frequency, and propagation of midlatitude cyclones on seasonal and …
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Interannual variability in cloudiness, sea surface temperature, and atmospheric circulation over the midlatitude North Pacific during summer
… and cloud gradient between subtropics and midlatitudes. Investigation of variability in low cloud types indicates that a shift in the SST gradient region produces corresponding shifts in the transition from subtropical cumulus to midlatitude stratus and the transition from midlatitude …
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Structure and statistical analysis of the microphysical properties of the comma-head region of cold-season midlatitude cyclones
This dissertation presents analyses of the microphysical structure and processes producing precipitation in the comma-head region of cold-season continental cyclones, using data collected by the W-band Wyoming Cloud Radar and in-situ instrumentation aboard the NSF/NCAR C-130 research aircraft …
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A preliminary assessment of the capability of GOES visible and infrared sensors in detecting rainfall in midlatitude cyclones
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1981.
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Interactions between clouds and atmospheric circulation in the extratropics
… models. In the mean state, the position of the midlatitude jet correlates well with the midlatitude shortwave cloud-radiative effect (SW CRE), which suffers from very large biases in models. Models in which midlatitude SW CRE is too negative have anomalously cold midlatitudes, leading to an …
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A kinematic modeling study of the re-organization of snowfall between cloud top generating cells and low-level snowbands in midlatitude winter storms
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Atmospheric Predictability in the Presence of Tropical Forcing
… forecast experiments including and excluding midlatitude orography.
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Three-Dimensional Tomographic Imaging of the Ionosphere Using Global Positioning System Measurements
… explores the localized 3D imaging of quiet midlatitude conditions and of two classes of structures: equatorial-originating ionospheric depletions and mesoscale traveling ionospheric disturbances (MS-TIDs). A time-series of reconstructed images unravels the evolution and movement of …
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