1 edition of Sensitivity of the California Coastal Jet to synoptic scale flow found in the catalog.
by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va
Written in English
The California Coastal Jet can have a significant impact on many operations. This study examines the sensitivity of the California Coastal Jet to the synoptic-scale flow by examining the surface reflection of the jet at a particular buoy (buoy 46028) off the Central California coast. Statistical analysis and subjective examination of surface charts were performed to help determine the relationship between the synoptic flow regime and the observed surface winds. The main results of the study are as follows: The magnitude of the California Coastal Jet is sensitive to the geostrophic wind direction. The surface reflection of the California Coastal Jet at buoy 46028 does not exhibit diurnal variation. The day to day variability in the observed winds is much larger than the diurnal variation at buoy 46028. Higher wind speed events at buoy 46028 correspond to periods when the synoptic analyses are not performing adequately (meso-scale effects such as flow blocking and supercritical flow are missed in the model). Lower wind speed events correspond to periods when the synoptic-scale analyses are performing adequately. Recommendations for future study are made.
|The Physical Object|
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comprises a portion of the ESI data for Southern California. ESI data characterize the marine and coastal environments and wildlife by their sensitivity to spilled oil. The ESI data include information for three main components: shoreline habitats, sensitive . Jet and Synoptic Scale Dynamics At the large scale, the January 4 event is characterized by an approaching low pressure system, jet streak, and cold front as shown in Figure 1. Over the time period from January 3 through January 5, an upper level trough and jet streak approach the Northern California Author: K. C. King, M. L. Kaplan, C. Smallcomb.
Synoptic or Large Scale Weather Spanning somewhat smaller, yet large distances of a few hundred to several thousand kilometers, are synoptic scale weather systems. Synoptic scale weather features include those having lifetimes of a few days to a week or more, such as:Author: Rachelle Oblack. This data set contains vector lines and polygons representing the shoreline and coastal habitats of Central California classified according to the Environmental Sensitivity Index (ESI) classification system. This data set comprises a portion of the ESI data for Central California. ESI data characterize the marine and coastal environments and wildlife by their sensitivity to spilled oil.
ways of sensitivity propagation remains, however, an open question, as is the propagation of sensitivity south-ward past Point Conception. This work uses the adjoint of an ocean general circu-lation model to diagnose the response of SSH near Port San Luis, off the coast of central California. This synoptic forcing is related to event cycles that cause wind reversal as in Halliwell and Allen () and Mass and Bond (), but includes weaker events. The wind relaxations extend similar to km offshore, similarly to the California-scale hydraulic expansion fan shaping the prevailing winds, and similar to km alongshore.
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Abstract. Approved for public release; distribution is unlimitedThe California Coastal Jet can have a significant impact on many operations. This study examines the sensitivity of the California Coastal Jet to the synoptic-scale flow by examining the surface reflection of the jet at a particular buoy (buoy ) off the Central California : R.
Scott Stevens. The synoptic-scale offshore flow results in the evacuation of the marine layer to the north, which results in the reversal of the along-coast pressure gradient.
This pressure gradient reversal then initiates a coastally trapped Kelvin wave that propagates north along the coast away from the region of synoptic by: the neighboring ocean, and disrupts the northerly flow along the coast. The strong MABL along the coast of California becomes modulated by the terrain of the California coast, and the dynamics of the low-level flows are significantly different north and south of Cape Mendocino.
Synoptic conditions on 22 June from the EtaCited by: Pressure perturbations associated with the topographic flows induce a complex mesoscale response that adds rich mesoscale structure to the jet including a wake region that forms on the lee side of the coastal range that limits the horizontal scale of the jet.
Sensitivity test results underscore the multiprocess character of the coastal dynamics and the importance of the coastal topography and differential frictional drag at the land–sea interface for the formation and amplification of the by: Strong synoptic scale northerly winds and a strong, elevated temperature inversion offshore the central and northern coast of California typically result from this horizon- tal pressure : Teddy Holt.
The inﬂuence of synoptic scale ﬂow on sea breeze (as seen from the sea), while calm zones appeared near the coast for weak to moderate large-scale ﬂows about 30 THE INFLUENCE OF SYNOPTIC SCALE FLOW ON SEA BREEZE sea breeze. TIBL is very less (24 km) on the west coast under the complex topographic effect.
The sea breeze frontal activity is more intensive on the east coast with vertical velocity of the order of m/sec by the retarding influence of southwesterly synoptic flow. Key words − ARMEX, Synoptic flow, Coastal boundary layer, Land-Sea breeze, TIBL, TKE. Coast-parallel low-level jets are commonplace in the offshore environment along the west coast of the United States during summer.
The jet often has wind speeds in excess of 30 m s-1 and is. synoptic-scale cyclones characterized by a warm, moist low-level air mass extending poleward beneath a cold, dry midlevel air mass.
Changes in wind speed and direction with height were also observed, and attributed to the presence of a low-level southerly jet stream beneath the exit region of strong mid and upper-level jet streaks.
Journal of Geophysical Research: Atmospheres. Winter and spring temperature and precipitation conditions in Svalbard are most sensitive to synoptic flow direction; •Synoptic‐scale eddies forcing and North Atlantic SST anomalies are crucial to the formation and.
synoptic-scale flow, stability of the air mass (low level inversions), cloud cover, soil moisture, swell types and stream of water, and sea surface temperature (SST), (Bowers ). The first category is static or changes very slowly, whereas the second one alters within a few days and the meteorological parameters vary from day to day or even.
North American regional reanalysis. We provide a synoptic scale perspective with the North American Regional Reanalysis (NARR, Mesinger et al. ).The NARR is a 32 km resolution product that covers North America and part of the Pacific and Atlantic Oceans (Fig.
2).The time series begins inand is updated regularly to extend the dataset to the by: Washington, DC: The National Academies Press. doi: / three-dimensional interactions of the land-sea breeze with variable synoptic-scale flow, nonuniform land and water surfaces, irregular coastlines, and complex terrain; be used to determine the sensitivity of coastal processes to various influences, and be used to study.
the genesis and maintenance of the coastal jet based on several field experiments and modeling studies. Small-scale wind speed maxima observed in the lee of capes and points have led to the hypothesis that supercritical flow is potentially responsible for their formation (Winant et al.
Mountain wave effects have also beenAuthor: Douglas K. Miller, Wendell A. Nuss, Patrick S. Cross. For a typical mid-latitude synoptic-scale disturbance, with similar meridional and zonal scales (l ≈ k) and zonal wavelength of order km, the Rossby wave phase speed relative to the zonal flow calculated from eqn  is approximately −8 m s −1.
Composite analyses illustrate the vastly different synoptic-scale characteristics associated with westerly and south/southwesterly ARs (Cluster 2 and Cluster 3). These different synoptic-scale flow configurations result in differences in synoptic scale forcing co-located over the composite AR and the Russian River watershed (Fig.
Figure 2. THE RELATIONSHIP BETWEEN SYNOPTIC SCALE WINDS AND SURFACE FLOWS IN A DEEP VALLEY Sharon Zhong1, Wenqing Yao1, and C. David Whiteman2 1 Michigan State University, East Lansing, MI, USA 2University of Utah, Salt Lake City, UT, USA E-mail: [email protected] Abstract: The dynamic mechanisms that lead to high wind events in the deep, narrow Owens Valley in the lee of the.
The influence of the main large-scale wind directions on thermally driven mesoscale circulations at the Baltic southwest coast, southeast of Sweden, is examined. The aim of the study is to highlight small-scale alterations in the coastal atmospheric boundary layer.
A numerical three-dimensional mesoscale model is used in this study, which is focused on an overall behaviour of the coastal Cited by: laminar (smooth, steady) flow becomes irregular and turbulent • Most weather disturbances involve turbulence • 3 kinds: – Mechanical turbulence –you, buildings, etc.
– Thermal turbulence –due to warm air rising and cold air sinking caused by surface heating – Clear Air Turbulence (CAT) -due to wind shear, i.e. change in wind speed. This data set contains vector lines and polygons representing the shoreline and coastal habitats of Northern California, classified according to the Environmental Sensitivity Index (ESI) classification system.
This data set comprises a portion of the ESI data for Northern California. ESI data characterize the marine and coastal environments and wildlife by their sensitivity to spilled oil. A ship survey was conducted during 17–27 August after a period of typical strong upwelling-favorable wind stress ().Maps of temperature, salinity and density at 15 m from SeaSoar CTD observations during 19–23 August all show the separating coastal upwelling jet ().Cold, saline upwelled water is evident over the shelf throughout the study region, but is restricted for the most part to Cited by: Coast Guard, Office of Incident Management and Preparedness, Washington, D.C.; and Department of Fish and Game, Office of Spill Prevention and Response, Sacramento, California.
Publication_Date: Title: Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Northern California: HYDRO (Hydrography Lines and Polygons) Edition: Second.5.
In the vertical dimension, the upper level jet stream is located closest to which mandatory synoptic scale pressure level?
a. The millibar level (1, meters) b. The surface c. The millibar level (5, meters) d. The millibar level (9, meters) 6. The seasons of Spring, Summer, Winter, and Fall are a direct result of which.