EOPACE (Electrooptical Propagation Assessment in Coastal Environments) overview and initial accomplishments

Jensen, D. R.; Gathman, Stuart G.; Zeisse, C. R.; Littfin, Kathleen M.

doi:10.1016/s0021-8502(99)80038-x

Cited by 11 publications

(6 citation statements)

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“…The lidar measurements were collected nearly directly over the shore. (Jensen et al 2001). Even accounting for the large uncertainties in our estimated aerosol scattering values for these measurements (ϳ50% mainly due to poor lidar calibration at that time and uncertainty in the mass scattering efficiency), our Bellows Beach values are significantly lower than those measured at the Scripps Pier (Jensen et al 2001).…”

Section: Sea-salt Fluxesmentioning

confidence: 73%

“…(Jensen et al 2001). Even accounting for the large uncertainties in our estimated aerosol scattering values for these measurements (ϳ50% mainly due to poor lidar calibration at that time and uncertainty in the mass scattering efficiency), our Bellows Beach values are significantly lower than those measured at the Scripps Pier (Jensen et al 2001). This large difference in aerosol concentrations between the two sites is most likely due to lighter winds at the Scripps Pier site (1-3 m s Ϫ1 ), although wave height and bottom topography also play a role.…”

Section: Sea-salt Fluxesmentioning

confidence: 73%

“…Understanding and modeling these aerosol fields is of interest for imaging, laser ranging, and optical communication systems. The U.S. Navy has interest in the surfzone-generated aerosols as these could adversely impact the naval operation in the littoral (coastal) region (Richter and Hughes 1991;Jensen et al 2001). Although the causes of inhomogeneity in marine aerosol optical fields are generally understood, many specific details remain poorly characterized and modeled.…”

Section: Introductionmentioning

confidence: 99%

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Vertical and Horizontal Aerosol Scattering Fields over Bellows Beach, Oahu, during the SEAS Experiment*

Porter¹,

Lienert²,

Sharma³

et al. 2003

J. Atmos. Oceanic Technol.

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Scanning lidar measurements were carried out during the Shoreline Environment Aerosol Study (SEAS) experiment (19-30 April 2000) to characterize the aerosol scattering fields in the coastal marine boundary layer at Bellows Beach on the southeast side of Oahu, Hawaii. The sea salt was found to be well mixed throughout the mixed layer, although the depth of the trade wind mixed layer was found to vary significantly over short timescales. As expected, the frequency distribution of aerosol scatter had a lognormal distribution, with the exception of regions downwind of breaking waves, where the frequency distribution was bimodal. A spatial statistical study revealed that the island-blocking effects cause low-level clouds to develop as they approach the island, with enhanced drizzle near the coastline reaching all the way to the surface. The spray from waves breaking on an outer reef was found to be intermittent and contained to heights of 20 m (on average) for the average wind speed of 7 m s 1. Sea-salt concentrations and fluxes from the breaking waves were estimated from the lidar measurements and found to be within the range of values reported by other investigators.

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Section: Sea-salt Fluxesmentioning

confidence: 73%

Section: Sea-salt Fluxesmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vertical and Horizontal Aerosol Scattering Fields over Bellows Beach, Oahu, during the SEAS Experiment*

Porter¹,

Lienert²,

Sharma³

et al. 2003

J. Atmos. Oceanic Technol.

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“…It was part of the experimental series 5 called Electro-Optical Propagation Assessment in Coastal Environments ͑EOPACE͒. Transmission, aerosol, and meteorological measuring systems were set up across the ocean at Zuniga Shoals just outside San Diego Bay.…”

Section: Methodsmentioning

confidence: 99%

Low-altitude infrared propagation in a coastal zone: refraction and scattering

Doss-Hammel¹,

Zeisse²,

Barrios³

et al. 2002

Appl. Opt.

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Midwave and long-wave infrared propagation were measured in the marine atmosphere close to the surface of the ocean. Data were collected near San Diego Bay for two weeks in November 1996 over a 15-km horizontal path. The data are interpreted in terms of effects expected from molecules, aerosol particles, and refraction. Aerosol particles are a dominant influence in this coastal zone. They induce a diurnal variation in transmission as their character changes with regular changes in wind direction. A refractive propagation factor calculation is introduced, and it is systematically applied to the model and to the data analysis. It is shown that this refractive propagation factor is a necessary component of a complete near-sea-surface infrared transmission model.

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“…It was also an impulse to further studies of manual analysis of meteorological forcing on aerosol optical depth. Similar studies have been performed with satellite observations [10][11][12][13] and meteorological analyses [14][15][16][17] also by using ground-based sun photometry and lidar on land or on the ship, plane platforms, which are very effective in investigations of aerosol optical properties [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Aerosol optical depth measured at different wavelengths is one of the key parameters in aerosol studies [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Aerosol Optical Depth Measured at Different Coastal Boundary Layers and Its Links with Synoptic-Scale Features

et al. 2009

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This paper presents the results of measurements of aerosol optical properties which were made between 2006 and 2008 within the framework of various international projects in different locations such as Spitsbergen, northern Norway and Crete. The investigations were made under different baric topography conditions and in various seasons of the year which facilitated the investigations of spatial and temporal dependencies between upper troposphere mass state and spectral variations of aerosol properties. The results of aerosol optical depth (AOD) measurements showed significant episodes during which jet stream events (300 hPa surface) over the Arctic were present. The mean spectral characteristics of AOD from "before" and "after" the event differ by 0.14 versus the "during" phase of the episode. The macrometeorological relative topography charts shown also the relationships between the 500 hPa, close sea-level pressure SLP (1,000 hPa) charts surfaces and the attenuation caused by aerosol scattering and absorption in vertical profiles during the afternoon hours.

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EOPACE (Electrooptical Propagation Assessment in Coastal Environments) overview and initial accomplishments

Cited by 11 publications

References 0 publications

Vertical and Horizontal Aerosol Scattering Fields over Bellows Beach, Oahu, during the SEAS Experiment*

Vertical and Horizontal Aerosol Scattering Fields over Bellows Beach, Oahu, during the SEAS Experiment*

Low-altitude infrared propagation in a coastal zone: refraction and scattering

Aerosol Optical Depth Measured at Different Coastal Boundary Layers and Its Links with Synoptic-Scale Features

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