The 1997 Pan American Climate Studies Tropical Eastern Pacific Process Study. Part II: Stratocumulus Region

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  • 1 Department of Atmospheric Sciences, University of Washington, Seattle, Washington
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An ad hoc experiment in the marine stratocumulus region to the west of Mexico was conducted from 29 August to 6 September 1997 as part of the Pan American Climate Studies Tropical Eastern Pacific Process Study cruise on the National Oceanic and Atmospheric Administration ship Ronald H. Brown after a medical emergency cut short the planned time in the eastern Pacific ITCZ. The joint variation of cloud structure, drizzle, and tropospheric stratification was documented by a combination of three hourly upper air soundings, scanning C-band radar, hourly cloud photography, and visual observation. The sensitive C-band Doppler radar mounted on the ship was able to obtain observations of drizzle cells with regions of greater than 10 dBZ of 2–3-km scale in the horizontal and peak reflectivities of greater than 25 dBZ.

*JISAO Contribution Number 639.

Corresponding author address: Professor Sandra Yuter, Atmospheric Sciences, Box 351640, University of Washington, Seattle, WA 98195-1640. E-mail: yuter@atmos.washington.edu

An ad hoc experiment in the marine stratocumulus region to the west of Mexico was conducted from 29 August to 6 September 1997 as part of the Pan American Climate Studies Tropical Eastern Pacific Process Study cruise on the National Oceanic and Atmospheric Administration ship Ronald H. Brown after a medical emergency cut short the planned time in the eastern Pacific ITCZ. The joint variation of cloud structure, drizzle, and tropospheric stratification was documented by a combination of three hourly upper air soundings, scanning C-band radar, hourly cloud photography, and visual observation. The sensitive C-band Doppler radar mounted on the ship was able to obtain observations of drizzle cells with regions of greater than 10 dBZ of 2–3-km scale in the horizontal and peak reflectivities of greater than 25 dBZ.

*JISAO Contribution Number 639.

Corresponding author address: Professor Sandra Yuter, Atmospheric Sciences, Box 351640, University of Washington, Seattle, WA 98195-1640. E-mail: yuter@atmos.washington.edu
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