Index Catalog // ScholarsArchive@OSU

Variability in the Southerly Flow into the Eastern Pacific ITCZ

Creator:: de Szoeke, Simon P. and Bretherton, Christopher S.
Abstract:: During boreal summer and fall, there is a strong southerly boundary layer flow across the equator into the east Pacific intertropical convergence zone (ITCZ). The modulation of this flow on synoptic to seasonal time scales is studied using an index of meridional pressure difference between the equator and the ITCZ...
Resource Type:: Article
Full Text:: * School of Ocean and Earth Science and Technology Contri- bution Number 6629 and International Pacific

Effect of shallow cumulus convection on the eastern Pacific climate in a coupled model

Creator:: de Szoeke, Simon P., Wang, Yuqing, Xie, Shang-Ping, and Miyama, Toru
Abstract:: Shallow cumulus convection evaporates stratocumulus clouds in the atmospheric boundary layer. The effect of shallow convection on the large-scale climate of the eastern tropical Pacific is investigated with a coupled ocean-atmosphere model by disabling the shallow convection parameterization (noSC). Without shallow convection, the stratiform cloud fraction increases and surface solar...
Resource Type:: Article
Full Text:: for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan. Copyright

A regional real-time forecast of marine boundary layers during VOCALS-REx

Creator:: Wang, S., O'Neill, L. W., Jiang, Q., de Szoeke, Simon P., Hong, X., Jin, H., Thompson, W. T., and Zheng, X.
Abstract:: This paper presents an evaluation and validation of the Naval Research Laboratory's COAMPS® real-time forecasts during the VOCALS-REx over the area off the west coast of Chile/Peru in the Southeast Pacific during October and November 2008. The analyses focus on the marine boundary layer (MBL) structure. These forecasts are compared...
Resource Type:: Article
Full Text:: . Atmospheric Chemistry and Physics A regional real-time forecast of marine boundary layers during VOCALS-REx

Stratocumulus Cloud-Top Height Estimates and Their Climatic Implications

Creator:: Zuidema, Paquita, Painemal, David, de Szoeke, Simon P., and Fairall, Chris
Abstract:: A depth-dependent boundary layer lapse rate was empirically deduced from 156 radiosondes released during six month-long research cruises to the southeast Pacific sampling a variety of stratocumulus conditions. The lapse-rate dependence on boundary layer height is weak, decreasing from a best fit of 7.6 to 7.2 K km⁻¹ as the...
Resource Type:: Article
Full Text:: jcli2708 4652..4666 Stratocumulus Cloud-Top Height Estimates and

Air-sea interaction over ocean fronts and eddies

Creator:: Small, R. J., de Szoeke, Simon P., Xie, S. P., O'Neill, L., Seo, H., Song, Q., Cornillon, P., Spall, M., and Minobe, S.
Abstract:: Air-sea interaction at ocean fronts and eddies exhibits positive correlation between sea surface temperature (SST), wind speed, and heat fluxes out of the ocean, indicating that the ocean is forcing the atmosphere. This contrasts with larger scale climate modes where the negative correlations suggest that the atmosphere is driving the...
Resource Type:: Article
Full Text:: Department of Meteorology, HIG350, School of Ocean and Earth Science and Technology, 2525 Correa Road

Thermodynamic and Aerosol Controls in Southeast Pacific Stratocumulus

Creator:: Mechem, David B., Yuter, Sandra E., and de Szoeke, Simon P.
Abstract:: A near-large-eddy simulation approach with size-revolving (bin) microphysics is employed to evaluate the relative sensitivity of southeast Pacific marine boundary layer cloud properties to thermodynamic and aerosol parameters. Simulations are based on a heavily drizzling cloud system observed by the NOAA ship Ronald H. Brown during the Variability of the...
Resource Type:: Article
Full Text:: , University of Kansas, Lawrence, Kansas SANDRA E. YUTER Department of Marine, Earth, and Atmospheric

Observations of Stratocumulus Clouds and Their Effect on the Eastern Pacific Surface Heat Budget along 20 degrees S

Creator:: de Szoeke, Simon P., Yuter, Sandra, Mechem, David, Fairall, Chris W., Burleyson, Casey D., and Zuidema, Paquita
Abstract:: Widespread stratocumulus clouds were observed on nine transects from seven research cruises to the southeastern tropical Pacific Ocean along 20°S, 75°–85°W in October–November of 2001–08. The nine transects sample a unique combination of synoptic and interannual variability affecting the clouds; their ensemble diagnoses longitude–vertical sections of the atmosphere, diurnal cycles...
Resource Type:: Article
Full Text:: DAVID MECHEM,# CHRIS W. FAIRALL,@ CASEY D. BURLEYSON,1 AND PAQUITA ZUIDEMA& * College of Earth, Ocean

The Tropical Eastern Pacific Seasonal Cycle: Assessment of Errors and Mechanisms in IPCC AR4 Coupled Ocean–Atmosphere General Circulation Models

Creator:: de Szoeke, Simon P. and Xie, Shang-Ping
Abstract:: Warmer SST and more rain in the Northern Hemisphere are observed year-round in the tropical eastern Pacific with southerly wind crossing the equator toward the atmospheric heating. The southerlies are minimal during boreal spring, when two precipitation maxima straddle the equator. Fourteen atmosphere–ocean coupled GCMs from the Coupled Model Intercomparison...
Resource Type:: Article
Full Text:: Pacific Research Center/School of Ocean and Earth Science and Technology Publication Number 480/7202

Surface Flux Observations on the Southeastern Tropical Pacific Ocean and Attribution of SST Errors in Coupled Ocean–Atmosphere Models

Creator:: de Szoeke, Simon P., Fairall, Christopher W., Wolfe, Daniel E., Bariteau, Ludovic, and Zuidema, Paquita
Abstract:: A new dataset synthesizes in situ and remote sensing observations from research ships deployed to the southeastern tropical Pacific stratocumulus region for 7 years in boreal fall. Surface meteorology, turbulent and radiative fluxes, aerosols, cloud properties, and rawinsonde profiles were measured on nine ship transects along 20°S from 75° to...
Resource Type:: Article
Full Text:: CHRISTOPHER W. FAIRALL AND DANIEL E. WOLFE National Oceanic and Atmospheric Administration/Earth System

Evaluating WRF-Chem aerosol indirect effects in Southeast Pacific marine stratocumulus during VOCALS-REx

Creator:: Saide, P. E., Spak, S. N., Carmichael, G. R., Mena-Carrasco, M. A., Yang, Q., Howell, S., Leon, D. C., Snider, J. R., Bandy, A. R., Collett, J. L., Benedict, K. B., de Szoeke, Simon P., Hawkins, L. N., Allen, G., Crawford, I., Crosier, J., and Springston, S. R.
Abstract:: We evaluate a regional-scale simulation with the WRF-Chem model for the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx), which sampled the Southeast Pacific's persistent stratocumulus deck. Evaluation of VOCALS-REx ship-based and three aircraft observations focuses on analyzing how aerosol loading affects marine boundary layer (MBL)...
Resource Type:: Article
Full Text:: University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, USA 9Harvey Mudd College

ScholarsArchive@OSU

Variability in the Southerly Flow into the Eastern Pacific ITCZ

Effect of shallow cumulus convection on the eastern Pacific climate in a coupled model

A regional real-time forecast of marine boundary layers during VOCALS-REx

Stratocumulus Cloud-Top Height Estimates and Their Climatic Implications

Air-sea interaction over ocean fronts and eddies

Thermodynamic and Aerosol Controls in Southeast Pacific Stratocumulus

Observations of Stratocumulus Clouds and Their Effect on the Eastern Pacific Surface Heat Budget along 20 degrees S

The Tropical Eastern Pacific Seasonal Cycle: Assessment of Errors and Mechanisms in IPCC AR4 Coupled Ocean–Atmosphere General Circulation Models

Surface Flux Observations on the Southeastern Tropical Pacific Ocean and Attribution of SST Errors in Coupled Ocean–Atmosphere Models

Evaluating WRF-Chem aerosol indirect effects in Southeast Pacific marine stratocumulus during VOCALS-REx

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