Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 39 for “"Moisture Flux"”.
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Precipitation and moisture flux divergence associated with Great Plains low level jet activity
… data have been evaluated to determine moisture flux convergence and precipitation associated with low level jet (LLJ) activity during JJA of 1992 - 1996. Hourly NOAA Profiler Network 404 MHz radar profiler data were used to determine persistent and widespread (PW) LLJ conditions for …
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An analysis of recent severe climate events over Tanzania
… the Congo forests). High values of latent heat flux occurred in the Congo forests during the OND season, suggesting this region to be among the sources of moisture for said season. Generally, the easterly moisture flux dominates the region for both the OND and MAM seasons and this suggests the …
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On tropospheric rivers
… on a daily map of vertically integrated moisture flux. Firstly, an automated procedure for identifying and tracking these rivers (named TRICKS, i.e., the Tropospheric River Identifying and traCKing Scheme) is described and its performance is evaluated. This procedure enables the maxima of …
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Thermohaline circulation stability : a box model
… to the equilibrium state perturbations to the moisture and heat fluxes into the three boxes. High rates of increase in the moisture flux into the northern high-latitude box lead to a THC breakdown at smaller total final increases in the moisture flux than low rates, while the presence of …
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Variability of summer rainfall over southwestern Madagascar
… winds at the surface. Composite anomalies of moisture flux and moisture flux convergence at 850 hPa, 500 hPa omega and velocity potential at .995 sigma level, using NCEP/NCAR reanalysis data, associated with El Niño events, La Niña events that occurred during the period of study were examined. …
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Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer experiment : a case study
… in the determination of the momentum and scalar fluxes remains one of the main obstacles to accurate numerical forecasts in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in …
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Investigations of scalar transfer coefficients in fog during the Coupled Boundary Layers and Air Sea Transfer Experiment : a case study
… in the determination of the momentum and scalar fluxes remains one of the main obstacles to accurate numerical forecasts in low to moderate wind conditions. For example, latent heat fluxes computed from data using direct covariance and bulk aerodynamic methods show that there is good agreement in …
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A multi-scale modeling study of the impact of land surface heterogeneity on the convective boundary layer in the U.S. Midwest
… in the U.S. Midwest include synoptic scale moisture intrusion into the region from the Gulf of Mexico through the Great Plains Low Level Jet (LLJ); passing of meso-scale convective systems, which is influenced by the unique nature of air-mass mixing over the region; and the effect of high …
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North American monsoon precipitation and its precursors: processes at the seasonal and diurnal scale
… between precipitation and the other moisture budget variables, the large-scale flow, and atmospheric stability on the seasonal and diurnal scales. On both the seasonal and diurnal scale, flow was key to the location and intensity of precipitation. In 2004, the subtropical high over …
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An Observational and Modeling Study of the Relationships Between United States Precipitation and Pacific Sea Surface Temperature
… in precipitation is caused by enhanced low-level moisture flux, strong upper-level cyclonic circulation and intensified zonal wind over the U.S. The second part was to assess U.S. precipitation variability in the model, forced by the observed time-varying SST (1950-1994). In both winter and …
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Application of thermocouple psychrometers to field measurements of soil moisture potential.
… has made possible the measurement of soil moisture potentials to values as low as -80 bars. The applicability of this type of psychrometer to "in situ" measurements of moisture potential at a Sonoran desert field site is investigated. An evaluation is made of the effect of variations in …
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On the role of the Agulhas Current on weather and climate of South Africa
… surrounding ocean, leading to a large turbulent flux of moisture from ocean to atmosphere (also called the turbulent latent heat flux). The dynamics of ocean-atmosphere interaction above the Agulhas Current and its impact on the weather and climate of Southern Africa are not well known. This is …
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Moisture transport associated with the summertime North American monsoon.
… July-August wet season. Vertically-integrated fluxes and flux divergences of water vapor are computed for the 8 summers, 1985-1992, from ECMWF mandatory-level analyses possessing a spectral resolution of triangular 106 (T106). The intraseasonal variability of water vapor transports are also …
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The influence of the Agulhas Current on two South African extreme weather events
… midlevel westerly trough. NCEP derived moisture flux diagrams and back trajectories of air parcels constructed from ECMWF data suggest that the Agulhas Current region was a major source of low level moisture for both storms. TRMM satellite imagery captured heavy rainfall above the high …
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Approaching Arctic-midlatitude dynamics from a two-way feedback perspective
… is also explored in the context of Arctic moisture fluxes. The circulation response to sea ice loss also drives changes in Arctic moisture fluxes, with moisture flux out of the Arctic increasing more than moisture flux into the Arctic. The two-way feedback perspective explored in this …
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A 1400 Year Multi-Proxy Record of Hydrologic Variability in the Gulf Of Mexico: Exploring Ocean-Continent Linkages During the Late Holocene
… America continent is directly dependent on the moisture balance (E/P) over the sub-tropical Gulf of Mexico (a major source of moisture to the North America continent). Warm, moist air masses from the south interact with cold/dry air masses from the north over the North American continent to …
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Modeling the impact of atmospheric moisture transport on global ice volume
… ice sheet mass balance. In most cases, poleward moisture flux is fixed and accumulation of snow only depends on local temperature. In this study, a simple coupled atmosphere-ice process model is introduced. An improved representation of the atmospheric hydrological cycle is included, and …
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A numerical simulation of tropical storm Chedza over south-eastern Africa
… northern Mozambique Channel, leading to surface moisture flux convergence in the regions of heavy rainfall. Furthermore, moisture from the southwest Indian Ocean was advected into the region during the heavy rainfall. It is suggested that multiple favourable factors which included strong moisture …
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Investigating laminated sediments of the Al-Azraq basin, Jordan and the implications for paleoenvironmental variability
… possibly aragonite, and accompanying changes in moisture flux. The data demonstrate visible laminated rhythmites. XRF results identify alternating laminae of Ca and Si, SEM scans identify seasonal diatoms and EDS demonstrates an encrusting evaporite matrix. Results reveal variability in …
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