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Mesoscale Atmospheric Simulations Of Marine Layer Structure And Refractivity In The Southern California Bight
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Book Synopsis Mesoscale Atmospheric Simulations of Marine-Layer Structure and Refractivity in the Southern California Bight by : Robert T Williams (Jr)
Download or read book Mesoscale Atmospheric Simulations of Marine-Layer Structure and Refractivity in the Southern California Bight written by Robert T Williams (Jr) and published by . This book was released on 1997-06-01 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculation of electromagnetic (EM) propagation in the littoral (marine coastal zone) can be a challenging problem for current numerical propagation models because of the sparsity of meteorological data necessary to describe the propagation medium. It is believed, however, that with sufficient improvement such models can simulate characteristics of the marine boundary layer depth, inversion height, and inversion strength, on temporal scales from an hour to several days. It may also be possible to estimate the subgrid scale statistics of the critical fields. The Penn State/National Center for Atmospheric Research non-hydrostatic mesoscale model (MM5) is used to test the predictability of marine temperature and moisture structures in the coastal zone of Southern California during the VOCAR (Variability of Coastal Atmospheric Refractivity) experiment of 1993. Hundreds of soundings taken at several sites in the VOCAR study area are analyzed to characterize the dependence of atmospheric refractivity and marine layer structure on time of day and distance offshore. High vertical resolution numerical simulations are performed using MMS and are evaluated against the special data over a period of about one week. The ability of a mesoscale numerical model to predict both short term (1-6 hours) and longer range (days) variations in marine layer structure and refractivity is demonstrated. The major conclusions are that the numerical model is capable of predicting (1) the basic evolution of marine boundary layer depth over a period of 7 days, (2) inversion structures in temperature and water vapor that account for the observed strength of trapping and ducting layers in the refractivity (M) profiles, and (3) gravity wave propagation in and above the marine boundary layer
Book Synopsis Mesoscale Atmospheric Simulations of Marine-Layer Structure and Refractivity in the Southern California Bight by :
Download or read book Mesoscale Atmospheric Simulations of Marine-Layer Structure and Refractivity in the Southern California Bight written by and published by . This book was released on 1997 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculation of electromagnetic (EM) propagation in the littoral (marine coastal zone) can be a challenging problem for current numerical propagation models because of the sparsity of meteorological data necessary to describe the propagation medium. It is believed, however, that with sufficient improvement such models can simulate characteristics of the marine boundary layer depth, inversion height, and inversion strength, on temporal scales from an hour to several days. It may also be possible to estimate the subgrid scale statistics of the critical fields. The Penn State/National Center for Atmospheric Research non-hydrostatic mesoscale model (MM5) is used to test the predictability of marine temperature and moisture structures in the coastal zone of Southern California during the VOCAR (Variability of Coastal Atmospheric Refractivity) experiment of 1993. Hundreds of soundings taken at several sites in the VOCAR study area are analyzed to characterize the dependence of atmospheric refractivity and marine layer structure on time of day and distance offshore. High vertical resolution numerical simulations are performed using MMS and are evaluated against the special data over a period of about one week. The ability of a mesoscale numerical model to predict both short term (1-6 hours) and longer range (days) variations in marine layer structure and refractivity is demonstrated. The major conclusions are that the numerical model is capable of predicting (1) the basic evolution of marine boundary layer depth over a period of 7 days, (2) inversion structures in temperature and water vapor that account for the observed strength of trapping and ducting layers in the refractivity (M) profiles, and (3) gravity wave propagation in and above the marine boundary layer
Book Synopsis Mesoscale Atmospheric Simulations of Marine-layer Structure by : Williams, Jr. (Robert Travis)
Download or read book Mesoscale Atmospheric Simulations of Marine-layer Structure written by Williams, Jr. (Robert Travis) and published by . This book was released on 1997 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Curricula in the Atmospheric, Oceanic, Hydrologic, and Related Sciences by :
Download or read book Curricula in the Atmospheric, Oceanic, Hydrologic, and Related Sciences written by and published by . This book was released on 1998 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earth and Mineral Sciences written by and published by . This book was released on 1996 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summertime Characteristics of the Central California Coastal Marine Atmospheric Boundary Layer by : Stephen Robert Lightfoote
Download or read book Summertime Characteristics of the Central California Coastal Marine Atmospheric Boundary Layer written by Stephen Robert Lightfoote and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface and upper air meteorological variables and sea surface temperature observations for the period of April-August 2005, 2006 and 2007 were analyzed to determine the vertical structure, temporal variability, and controlling parameters of the Central California Coastal Marine Atmospheric Boundary Layer (MABL) focusing at Bodega Bay, CA. In addition, atmospheric simulations using the Weather Research and Forecasting (WRF) model were performed for the month of June 2006 to determine the dominant coastal weather regimes during summer. Lastly, a sensitivity study was performed to determine the effect on short time scales of the magnitude of the surface fluxes of sensible and latent heat on the MABL structure during an upwelling and relaxation period. Observational results confirm that semi-persistent coastal upwelling during summer leads to the presence of a cool, shallow marine layer capped aloft by a stable subsidence inversion and to the east by the coastal topography. In addition, a Low Level Jet is located near the base of the inversion. Stability analysis indicates that on average the shallow surface layer is below the critical Richardson # (Rc~0.25) suggesting the presence of turbulence. The value of the Richardson # on average increases at the base of the subsidence inversion and remains supercritical (Rb>1.0) above the inversion base, suggesting laminar flow aloft. Spectral analysis indicates that the diurnal and synoptic wavelengths dominate the temporal variability of the MABL height parameter during the summertime. Lag correlation values of MABL depth with variables indicative of upwelling strength are consistent with a conceptual framework in which temporal changes in MABL depth are at least partially controlled by changes in upwelling strength. Model results confirm the presence of three dominant coastal weather regimes at Bodega Bay: Upwelling, Relaxation, and a special case known as a Coastally Trapped Wind Reversal. Lastly, the results of the sensitivity study indicate that over short time scales (~1 day), the flux of heat at the surface is not significant in determining the MABL depth during an upwelling regime, but that it may be significant during a relaxation period.
Book Synopsis Variability of Marine Fog Along the West Coast by : Maria K. Filonczuk
Download or read book Variability of Marine Fog Along the West Coast written by Maria K. Filonczuk and published by . This book was released on 1994 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric and Oceanic Mesoscale Processes by : Maithili Sharan
Download or read book Atmospheric and Oceanic Mesoscale Processes written by Maithili Sharan and published by Birkhäuser. This book was released on 2007-10-19 with total page 1880 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains many original findings on mesoscale processes in atmospheric and oceanic systems through mathematical modeling, numerical simulations and field experiments. These scientific papers examine and provide the latest developments on a range of topics that include tropical cyclones/hurricanes, mesoscale variability and modeling, seasonal monsoons and land surface processes including atmospheric boundary layer.
Book Synopsis Symposium on Boundary Layers and Turbulence by :
Download or read book Symposium on Boundary Layers and Turbulence written by and published by . This book was released on with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mesoscale Dynamics of the Marine Atmospheric Boundary Layer by : Hugh A. Rand
Download or read book Mesoscale Dynamics of the Marine Atmospheric Boundary Layer written by Hugh A. Rand and published by . This book was released on 1995 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Interactions Between the Marine Layer and the Western United States by : Timothy W. Juliano
Download or read book Atmospheric Interactions Between the Marine Layer and the Western United States written by Timothy W. Juliano and published by . This book was released on 2018 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal marine environments are regions of significant meteorological interest as a result of the direct impact of atmospheric processes on, for example, commerce and trade, naval operations, and civilian activities. Because the coastal topography of the Western United States acts as a lateral boundary for the marine layer over the Northeastern Pacific Ocean, it plays a critical role in the life cycle of various marine boundary layer (MBL) processes. The work presented here will investigate two MBL phenomena — namely hydraulic jumps and coastally trapped disturbances (CTDs) — that are strongly influenced by coastal terrain and highlight the influence of large-scale meteorological conditions on meso- and micro-scale processes. The first portion of this research focuses on a case study of an atmospheric hydraulic jump offshore California on 24 May 2012. Observations from the University of Wyoming King Air are compared with simulations using the Weather Research and Forecasting (WRF) model. A sharp thinning of the upstream MBL and the downstream development of a hydraulic jump was captured by both the aircraft and the WRF model. Numerical simulations reveal that a strongly divergent wind field, consistent with expansion fan dynamics, is present upwind of the hydraulic jump. Results from large-eddy simulations show a large increase in the turbulent kinetic energy field in the jump region. Part two of this study investigates 23 CTD events — spanning the years from 2004 to 2016 — from a climatological perspective using several data products, including model reanalyses, buoys, and satellites. For the first time, satellite retrievals suggest that CTD cloud decks may play a unique role in the radiation budget due to a combination of aerosol sources that increase cloud albedo by ∼2% on average. Three of the 23 CTD cases are examined in more detail using aircraft and satellite measurements in addition to the WRF model. A set of WRF configurations suggests that the treatment of model physics strongly influences CTD cloud field evolution. Moreover, cloud water-soluble ionic composition analyses conducted for two of the CTD cases indicate that continental aerosol sources may impact CTD cloud decks.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical & Electronics Abstracts by :
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 2240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts written by and published by . This book was released on 1996-04 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aquatic Sciences and Fisheries Abstracts by :
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1991 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms by : Babin, Marcel
Download or read book Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Book Synopsis Wind Stress and Wind Stress Curl Over the California Current by : Craig S. Nelson
Download or read book Wind Stress and Wind Stress Curl Over the California Current written by Craig S. Nelson and published by . This book was released on 1976 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historical surface marine observations are summarized by 1-degree square area and long term month to describe the seasonal distribution of wind stress over the California Current. Off the coasts of southern California and Baja California, an alongshore equatorward component is present throughout the year. The distributions north of Cape Mendocino are characterized by marked changes in direction and magnitude between summer and winter. The predominant wind stress maximum shifts northward coherently from off Point Conception in March to south of Cape Blanco in September, and extends approximately 500 km in the offshore direction and 1000 km in the alongshore direction. Maximum values of surface wind stress occur during July near Cape Mendocino. The wind stress curl is positive near the coast and negative in the region offshore.
