Numerical Simulation of Topographically Forced Mesoscale Variability in a Well-Mixed Marine Layer

Eddington, Lee; O’Brien, James J.; Stuart, David W.

doi:10.1175/1520-0493(1992)120<2881:nsotfm>2.0.co;2

Cited by 12 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The features found in this simulation are very similar to those in a modeling study by Eddington et al (1992) of a persistent wind maximum observed near Point Conception, California. In their study, the low-level flow is forced around an elevated headland, smaller than but…”

Section: The Veracruz Jetsupporting

confidence: 80%

Low-Level Jet Development during a Numerically Simulated Return Flow Event

Igau¹,

Nielsen‐Gammon²

1998

Mon. Wea. Rev.

View full text Add to dashboard Cite

The evolution of the southerly low-level jet (LLJ) during a return flow event is studied using output from the Penn State/NCAR Mesoscale Model (Version 4). Three geographically different southerly LLJs develop in the simulation: one over the southern Plains of the United States, a second southwest of Brownsville, Texas, and a third over the western Gulf of Mexico. The LLJ over the Plains is found to form first as an inertial oscillation and later as a response to lee troughing and an elevated mixed layer that develops over the region. Over Mexico, the temperature structure over the Altiplanicie Mexicana (Mexican High Plain) is responsible for a locally intense low-level pressure gradient east of the High Plain which remains nearly stationary over two diurnal cycles. The LLJ over the western Gulf of Mexico results largely from topographic blocking of the low-level southerly flow by the eastern end of the Neovolcanic Cordillera northwest of Veracruz, Mexico.The evolution of the lower troposphere over the southern Plains resembles the Carlson and Ludlam conceptual model for a severe storm environment, but the structure of the return flow is complex. When midlevel westerlies are weak, mesoscale and boundary layer processes govern the development of LLJs. As the west and southwesterly winds increase with an approaching upper-level disturbance, synoptic influences overwhelm the mesoscale processes leading to a single, larger-scale LLJ.

show abstract

Section: The Veracruz Jetsupporting

confidence: 80%

Low-Level Jet Development during a Numerically Simulated Return Flow Event

Igau¹,

Nielsen‐Gammon²

1998

Mon. Wea. Rev.

View full text Add to dashboard Cite

show abstract

“…For this reason, we implemented a single-layer diagnostic model of the marine boundary layer that is forced by the NORAPS winds but includes orography at the 10-km resolution of the modeling system. This model of the marine boundary layer is similar t o that used by Eddington et al [1992]. Essentially, what this model does is to adjust each 12-hourly NORAPS wind speed analysis to a higher resolution orography.…”

Section: Meteorological Forcing Fieldsmentioning

confidence: 99%

“…The terms underlined in (A1) and (A3) have been ignored, and (A4) to (A7) are not used. This simplified version is similar to that used by Eddington et al [1992]. Current versions of our forecast systems including the one for the Red Sea utilize the full two-layer model documented here for later reference.…”

Section: Ri = Gao(h -S) 001v_v01mentioning

confidence: 99%

A real‐time oceanographic nowcast/forecast system for the Mediterranean Sea

Horton¹,

Clifford²,

Schmitz³

et al. 1997

J. Geophys. Res.

View full text Add to dashboard Cite

Abstract. We describe here a nowcast/forecast system for the entire Mediterranean Sea, designed for real-time forecasts and closely resembling operational numerical weather prediction systems. The core of the system is a high-resolution (10 km) three-dimensional primitive equation-based, sigma-coordinate numerical circulation model, assimilating remotely sensed multi-channel sea surface temperature and in situ expendable bathythermograph/conductivity-temperature-depth observational data, using an optimal-interpolational scheme. We present results for 1993 and 1994 from this data-assimilation model, focusing principally on the mesoscale features prevalent in the western and eastern Mediterranean Sea. We show that the model exhibits considerable skill in simulating both the permanent and transient mesoscale features in the Mediterranean. In particular, hitherto less well-known and less well-studied circulation features in the Adriatic and Aegean Seas are carefully examined and presented. Particular care is given to discussing the circulation in the entire Mediterranean, with particular attention to flows through various straits and their variability.

show abstract

“…Mass et al (1986) gives a good description of a case of offshore fog on the U.S. west coast. Further work on these surges, with application in the Point Mugu area, was done by Eddington et al (1992).…”

Section: ) Dorman (1985)mentioning

confidence: 99%

“…An unusual area Backes (1977) remarks that Point Arguello (34.4°N) seemed almost decoupled in one set of observed fog phases. Rosenthal (1974), Edinger (1963), Dorman (1985), and Eddington et al (1992) describe the Catalina eddy in the same general area.…”

Section: B Offshore and Island Datamentioning

confidence: 99%

Fog on the U.S. West Coast: A Review

Leipper¹

1994

Bull. Amer. Meteor. Soc.

113

View full text Add to dashboard Cite

Weather forecasts and warnings are the most important services provided by the meteorological profession. The effective development of forecasting methods rests upon comprehensive knowledge of the phenomena to be forecast. To help provide such knowledge, this review includes a chronological summary of pertinent information concerning fog on the U.S. west coast. There is increasing evidence that periods of dense fog at National Weather Service west coast stations fall within a 5-to 15-day sequence of synoptic events. Further, such sequences may be divided into four distinct phases: initial conditions, fog formation, fog development and extension, and stratus. A separate article will review West Coast fog forecasting approaches and present resulting methods.

show abstract

Numerical Simulation of Topographically Forced Mesoscale Variability in a Well-Mixed Marine Layer

Cited by 12 publications

References 0 publications

Low-Level Jet Development during a Numerically Simulated Return Flow Event

Low-Level Jet Development during a Numerically Simulated Return Flow Event

A real‐time oceanographic nowcast/forecast system for the Mediterranean Sea

Fog on the U.S. West Coast: A Review

Contact Info

Product

Resources

About