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The Vamos Ocean-cloud-atmosphere-land Study Regional Experiment (Vocals-rex): Goals, Platforms, and Field Operations : Volume 10, Issue 9 (01/09/2010)

By Wood, R.

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Book Id: WPLBN0003972118
Format Type: PDF Article :
File Size: Pages 54
Reproduction Date: 2015

Title: The Vamos Ocean-cloud-atmosphere-land Study Regional Experiment (Vocals-rex): Goals, Platforms, and Field Operations : Volume 10, Issue 9 (01/09/2010)  
Author: Wood, R.
Volume: Vol. 10, Issue 9
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description
Description: Department of Atmospheric Sciences, University of Washington, Seattle, USA. The VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) was an international field program designed to make observations of poorly understood but critical components of the coupled climate system of the southeast Pacific. This region is characterized by strong coastal upwelling, the coolest SSTs in the tropical belt, and is home to the largest subtropical stratocumulus deck on Earth. The field intensive phase of VOCALS-REx took place during October and November 2008 and constitutes a critical part of a broader CLIVAR program (VOCALS) designed to develop and promote scientific activities leading to improved understanding, model simulations, and predictions of the southeastern Pacific (SEP) coupled ocean-atmosphere-land system, on diurnal to interannual timescales. The other major components of VOCALS are a modeling program with a model hierarchy ranging from the local to global scales, and a suite of extended observations from regular research cruises, instrumented moorings, and satellites.

The two central themes of VOCALS-REx are designed to improve understanding of (a) links between aerosols, clouds and precipitation and their impacts on marine stratocumulus radiative properties, and (b) physical and chemical couplings between the upper ocean and the lower atmosphere, including the role that mesoscale ocean eddies play. A set of hypotheses designed to be tested with the combined field, monitoring and modeling work in VOCALS is presented here. VOCALS-REx involved five research aircraft, two ships and two surface sites in northern Chile. We describe the instrument payloads and key mission strategies for these platforms and given a summary of the missions conducted.


Summary
The VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx): goals, platforms, and field operations

Excerpt
Abel, S. J., Walters, D. N., and Allen, G.: Evaluation of stratocumulus cloud prediction in the Met Office forecast model during VOCALS-REx, Atmos. Chem. Phys. Discuss., 10, 16797–16835, doi:10.5194/acpd-10-16797-2010, 2010.; Ackerman, A. S., Kirkpatrick, M. P., Stevens, D. E., and Toon, O. B.: The impact of humidity above stratiform clouds on indirect aerosol climate forcing, Nature, 432, 1014–1017, 2004.; Andreae, M. O. and Merlet, P.: Emission of trace gases and aerosols from biomass burning, Global Biogeochem. Cy., 15, 955–966, 2001.; Avey, L., Garrett, T., and Stohl, A.: Evaluation of the aerosol indirect effect using satellite, tracer transport model, and aircraft data from the International Consortium for Atmospheric Research on Transport and Transformation, J. Geophys. Res., 112, D10S33, doi:10.1029/2006JD007581, 2007.; Bennartz, R.: Global assessment of marine boundary layer cloud droplet number concentration from satellite, J. Geophys. Res., 112, D02201, doi:10.1029/2006JD007547, 2007.; Brenguier, J.-L. and Wood, R.: Observational strategies from the micro to meso scale, in: Perturbed clouds in the climate system, MIT Press, 2009.; Bretherton, C. S., Uttal, T., Fairall, C. W., Yuter, S. E., Weller, R. A., Baumgardner, D., Comstock, K., and Wood, R.: The E}{P}{I}{C 2001 stratocumulus study, B. Am. Meteor. Soc., 85, 967–977, 2004.; Bretherton, C. S., Wood, R., George, R. C., Leon, D., Allen, G., and Zheng, X.: Southeast Pacific stratocumulus clouds, precipitation and boundary layer structure sampled along 20 S during VOCALS-REx, Atmos. Chem. Phys. Discuss., 10, 15921–15962, doi:10.5194/acpd-10-15921-2010, 2010.; Brioude, J., Cooper, O. R., Feingold, G., Trainer, M., Freitas, S. R., Kowal, D., Ayers, J. K., Prins, E., Minnis, P., McKeen, S. A., Frost, G. J., and Hsie, E.-Y.: Effect of biomass burning on marine stratocumulus clouds off the California coast, Atmos. Chem. Phys., 9, 8841–8856, doi:10.5194/acp-9-8841-2009, 2009.; Caldwell, P., Wood, R., and Bretherton, C. S.: Mixed-layer budget analysis of the diurnal cycle of entrainment in SE {P}acific stratocumulus, J. Atmos. Sci., 62, 3775–3791, 2005.; Chand, D., Hegg, D. A., Wood, R., Shaw, G. E., Wallace, D., and Covert, D. S.: Source attribution of climatically important aerosol properties measured at Paposo (Chile) during VOCALS, Atmos. Chem. Phys. Discuss., 10, 17853–17887, doi:10.5194/acpd-10-17853-2010, 2010.; Colbo, K. and Weller, R.: The variability and heat budget of the upper ocean under the Chile-Peru stratus, J. Marine. Res., 65, 607–637, 2007.; Colbo, K. and Weller, R.: Accuracy of the IMET Sensor Package in the Subtropics, J. Atmos. Oceanic. Technol., 9, 1867–1890, 2009.; Comstock, K., Bretherton, C. S., and Yuter, S.: Mesoscale variability and drizzle in {S}outheast {P}acific stratocumulus, J. Atmos. Sci., 62, 3792–3807, 2005.; Comstock, K., Yuter, S. E., Wood, R., and Bretherton, C. S.: The three dimensional structure and kinematics of drizzling stratocumulus, Mon. Wea.\ Rev., 135, 3767–3784, 2007.; deSzoeke, S. P. and Xie, S. P.: The Tropical Eastern Pacific seasonal cycle: Assessment of errors and mechanisms in IPCC AR4 coupled ocean-atmosphere general circulation models, J. Climate, 21, 2473–2590, 2008.; Garreaud, R. D. and Muñoz, R.: The low-level jet off the sub-tropical coast of South America: Structure and variability, Mon. Weather Rev., 133, 2246–2261, 2005.; Garreaud, R. D. and Muñoz, R.: The diurnal cycle in circulation and cloudiness over the subtropical southeast {P}acific: A modeling study, J. Climate, 17, 1699–1710, 2004.; Geoffroy, O., Brenguier, J.-L., and Sandu, I.: Relationship between drizzle rate, liquid water path and droplet concentration at the scale of a stratocumulus cloud system, Atmos. Chem. Phys., 8, 4641–4654, doi:10.5194/acp-8-4641-2008, 2008.; George, R.

 

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