Mean Offshore Refractive Conditions during the CASPER East Field Campaign
Alappattu, Denny P.
MetadataShow full item record
In this study, we use observational and numerical model data from the Coupled Air Sea Processes and Electromagnetic Ducting Research (CASPER) field campaign to describe the mean refractive conditions offshore Duck, North Carolina. The U.S. Navy operational numerical weather prediction model known as the Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) performed well forecasting large-scale conditions during the experiment, with an observed warm bias in SST and cold and dry biases in temperature and humidity in the lowest 2000 m. In general, COAMPS underpredicted the number of ducts, and they were weaker and at lower height than those seen in observations. It was found that there is a noticeable diurnal evolution of the ducts, more over land than over the ocean. Ducts were found to be more frequent over land but overall were stronger and deeper over the ocean. Also, the evaporative duct height increases as one moves offshore. A case study was chosen to describe the electromagnetic properties under different synoptic conditions. In this case the continental atmospheric boundary layer dominates and interacts with the marine atmospheric boundary layer. As a result, the latter moves around 80 km offshore and then back inland after 2 h.
The article of record as published may be found at http://dx.doi.org/10.1175/JAMC-D-18-0029.1
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Ulate, M.; Wang, Q.; Haack, T.; Holt, T.; Alappattu, D.P. (American Meteorological Society (AMS), 2019);In this study, we use observational and numerical model data from the Coupled Air Sea Processes and Electromagnetic Ducting Research (CASPER) field campaign to describe the mean refractive conditions offshore Duck, North ...
Strub, Ted P.; Kosro, Michael P.; Huyer, Adriana; James, C.; Walstad, L.J.; Smith, R.L.; Barth, J.A.; Hood, R.R.; Abbott, M.R.; Brink, K.H.; Hayward, T.L.; Niiler, P.P.; Swenson, M.S.; Dewey, R.K.; Chavez, F.; Ramp, S.R.; Batteen, M.L.; Haney, R.L.; Mackas, D.L.; Washburn, L.; Kadko, D.C.; Barber, R.T.; Haidvogel, D.B.; CTZ Collaborators (1991-08-15);Data from the Coastal Transition Zone (CTZ) experiment axe used to describe the velocity fields and water properties associated with cold filaments in the California Current. Combined with previous field surveys and ...
Thornton, Michael Albert (2000-12-01);The objective of this report is to describe the results of a worldwide industry survey of the atmospheric diving suit (ADS). A glimpse into the past of significant ADSs from Lethbridge's 1715 "diving engine" to the well- ...