0830

Welcome and logistics (David Legler)

0845

Objectives of the PanAm PI meeting (Steve Esbensen)

Review of PACS progress

Present and discuss current PanAm PI research

Obtain PI input on proposed US CLIVAR plans

0915

The North American Monsoon Experiment: Request for PanAm PI input (Wayne Higgins)

Dynamics of the Coupled Ocean-Atmosphere System

(Session Chair: George Philander)

0945

El Nino: A Bridge between Measurements and Theory (G. Philander) (no abstract)

1020

Tropical Intra-seasonal Variability (D. Hartmann)

1045

Satellite Observations of Wind-stress and SST in the eastern tropical Pacific (D. Chelton, S. Esbensen and N. Thum)

1110

Stratus Clouds in Low Latitudes (S. Nigam) (no abstract)

1130

The Pan American Observing System: Overview (Meghan Cronin)

1200

Lunch

Eastern Pacific Climate and the Cold Tongue/ITCZ Complex

Topic: Air-sea interaction and convection (Session chair: Bob Weller)

1300

Seasonal and Interannual Modulation of Mixed Layer Variability at 0°, 110°W. Cronin and Kessler

1315

Processes Determining the Rapid Reestablishment of the Equatorial Pacific Cold Tongue. Wang and Fu

1330

Moored Observations of Air-Sea Interaction in the Eastern Tropical Pacific.Weller/Anderson

1345

Measurements of Air-Sea Fluxes, MBL Structure and Cloud Properties in the PACS Region. Fairall and Frisch

1400

Atmospheric Boundary-Layer Structures over the Eastern Equatorial Pacific-Mean States and Transformations Albrecht et. al.

1415

Variability of Near-Equatorial Lower Tropospheric Flow over the Cold Tongue. Hartten, Bond, and Gage

1430

Explicit Multi-scale modeling of Tropical Cloud Systems and their Large-scale Effects Moncrieff

1445

ITCZ Precipitating Cloud Systems and Sensitivity to Varying SST in the Eastern Pacific. Chen and Tenerilli

1500

Coffee Break

1530

Annual and Interannual Variability of the ITCZ and Its Embedded Synoptic-Scale Disturbances. Zhang

1545

Formation and Variability of a Northward Displaced ITCZ in a Hybrid Coupled AGCM. Xie, Okajima, Saito, and Numaguti

1600

Modulation of Intraseasonal Convection within the Eastern Pacific ITCZ. Kiladis, Harris, and Raymond

1615

Observations of the SITCZ During 1993-1999. Halpern

1630

Role of the Eastern North Pacific in the Global Water and Energy Cycle (Bates)

1645

Seasonal-to-Decadal Variability in the Eastern Pacific (Davis et. al.)

1700-1830

(Observing System and E. Pacific and Cold Tongue/ITCZ Complex Posters)

North American Warm Season Precipitation and the North American Monsoon

(Session Chair: Art Douglas)

0800

Diagnostic Studies of Long-Term Variability in the Mexican Monsoon: A review by Art Douglas and Phil Englehart.

0820

Intercomparison of the Principal Modes of Interannual and Intraseasonal Variability of the North American Monsoon System: Wayne Higgins and W. Shi.

0840

The Relationship and Response of the North American Monsoon to Tropical and North Pacific Sea Surface Temperatures: Chris Castro, Roger Pielke and Glen Liston.

0900

Rainfall Patterns Over the Southwestern U.S. in Relationship to ENSO During the Summer Monsoon Season: Klaus Wolter, Masha Medovaya and Jon Eischeid.

0920

Warm Season Precipitation Episodes Over North America and an Apparent Relationship to the North American Monsoon: R. Carbone and M. Moncrieff.

0940

Subseasonal Variations of Tropical Convection and Prediction of warm Season Rainfall in the North American Monsoon Region; Jeff Whitaker and Klaus Weickmann.

1000

Coffee Break

1015

Mean Fields and Synoptic Variability of Moisture Fluxes over the Gulf of California and Surrounding Regions during the Summer: Mike Douglas and Juan Carlos Leal.

1035

Satellite Observations of Pacific Moisture Surges Associated with the North America Monsoon: Wes Berg, Don Anderson and John. Bates.

1055

The Dependence of Seaonal Oscillation of western Cordillera Flows Upon the Mountains and Ambient Flow: Jan Paegle.

1115

Long Term Changes in Seasonality of Precipitation in the U.S. Southwest Monsoon Region: Henry Diaz and Dan Cayan.

1135

The Atlantic Multidecadal Oscillation and its Relationship to Rainfall and River Flows in the continental U.S.: Dave Enfield and A.M. Mestas-Nunez.

1155

Discussion

1215

Lunch

North American Warm Season Precipitation and the North American Monsoon

Topic 2: Modeling the North American Monsoon (Session Chair: Andrea Hahmann)

1315

Progress in modeling the North American Monsoon; Andrea Hahmann (no abstract)

1345

Regional Simulation of Summertime Precipitation Over the Southwestern United States; Bruce Anderson and John Roads

1405

Central US Springtime Precipitation Extremes: Teleconnections and Relationships with SSTs. Kumar et al

1425

Weather and Climate Modeling of the North American Monsoon; T.N. Krishnamurti

1445

The Influence of Soil Moisture Anomalies on Variability of the North American Monsoon System; Eric E. Small

1505

Simulation and Projection of the North American Monsoon System in the Hadley Centre GCM; Raymond W. Arritt, Christopher J. Anderson, and Dustin C. Goering.

1525

Introductions for NAM modeling posters

1535

Coffee break

The South American Monsoon System

Session Chairs: Rong Fu and Julia N-Paegle

1600

The South American monsoon: Seasonal cycle of precipitation; Rong Fu (25 minutes presentation and 5 minutes discussion)

1630

Variability and Predictability of the South American Monsoon System, Julia N-Paegle (25 minutes presentation and 5 minutes discussion)

1650

Mechanisms limiting the poleward extent of the summer monsoon convection zones in the Americas; Neelin and Chou.

1710

Seasonality and Interannual Variability of rainfall in the Brazilian Amazon Basin; Liebmann and Marengo

1730-1830

Poster Session II (Monsoon System Posters)

0800

Interannual and Interdecadal Variability of the South-American Monsoon System; Robertson and Mechoso

0815

The Pacific South-American Modes and their Downstream Impact, Mo and N-Paegle

0830

Tropospheric Direct Circulations Associated with the Climatic Components of SST Variability in the Equatorial Pacific; Enfield and Mestas-Nunez

0845

QUESTIONS for Robertson, Mo and Enfield

0855

Mesoscale Processes Associated with the South American Monsoon; Berbery

0910

A Regional Climate Model Study of Seasonal Climate Extremes in Tropical South-America; Seth

0925

Intercomparison of AGCM Simulations of the 1997/98 El Nino Impact on South American Summer monsoon; Zhou and Lau

0940

South American Summer Season Climate Simulations using the NCEP Eta model and the COLA AGCM; Kirtman, Verneker and Fennessy

0955

QUESTIONS for Berbery, Seth, Zhou and Kirtmann.

1005

Coffee Break

1015

What we have learned from PACS and where do we go from here?

(Session Co-Chairs: Steve Esbensen and Bob Dickinson)

Introductory presentations by the session leaders with discussion

PI feedback on US CLIVAR plans

Are the US CLIVAR scientific objectives on target?

Is the program effectively balanced?

How can we improve the implementation plans for NAME, EPIC and MESA?

How can US CLIVAR contribute to building the Pan American climate observing system?

1200

End of meeting

(Session Chair: Meghan Cronin)

OS-1

The Stratus Mooring. Anderson and Weller (no abstract)

OS-2

Enhanced TAO Monitoring of Ocean-Atmosphere Interactions in the Cold Tongue/ITCZ Complex. Cronin and McPhaden

OS-3

The North American Monsoon Experiment (NAME). Higgins (no abstract)

OS-4

PACS Data Management Center Information Server. Meitin and Williams

OS-5

Cloud Properties and Radiation Budget Parameters Derived from Satellite Data for the Pan American Climate Studies (PACS) Minnis et al

OS-6

Acoustical Rainfall Measurements from the TAO Moorings in the ITCZ along 95° W. Nystuen et al

OS-7

Air-Sea Interaction: Bulk Algorithm Development and Intercomparison and Skin SST Retrieval Zeng et al

OS-8

The PACS Sounding Network (SONET) Recent History and Improvements M. Douglas and J. Murillo.

Eastern Pacific Climate and the Cold-Tongue/ITCZ Complex

(Session Chairs: George Philander and Bob Weller)

EP-1

Upper Ocean Variability and Heat Budget Estimates from the PACS Pilot Surface Moorings. Anderson, Huang, and Weller

EP-2

Observed Atmospheric Boundary-Layer Characteristics over the Cold Tongue in the Eastern Pacific. Bond, Hartten, and Fairall

EP-3

Atmospheric Response to Tropical Instability Waves: Surface Heat Fluxes. Thum, Esbensen, Chelton, McPhaden

EP-4

Mean and Annual Cycle of Temperature and Geostrophic Currents in the East Pacific Warm Pool. Kessler

EP-5

Off-equatorial Upwelling in the Eastern Tropical Pacific and the Role of Equatorial Subsurface Countercurrents as Told by Numerical Simulations. Rothstein

EP-6

Observed Fluctuations in East Pacific Hadley Cell Strength. Raymond, Achach, Kiladis, Hartten, Gage

EP-7

Tropical-Extratropical Connections in North America through Easterly Waves and the Gulf Surge. Zehnder and Maddox

EP-8

The Role of Equatorial Surface Heating in Determining the Magnitude of El Niño Warming. Sun

EP-9

Eastern Pacific SST Dipole and its Relation to Indo-Pacific ENSO Mode. Yu

EP-10

Multi-scale Modeling of Extreme Eastern Pacific Convection. Mapes, Warner, and Xu

EP-11

Cloud and Radiation Properties Derived from Satellite Data During the Fall 1999 CIMAR-5 and EPIC Cruises. Young et. al.

The Pan American Monsoon System

Diagnostic Studies (Session Organizers: Art Douglas and Julia N.-Paegle)

MS-1

Water Vapor Tracers as Diagnostics of the Regional Atmospheric Hydrologic Cycle Bosolovich et al

MS-2

Relationship between Great Plains Low-Level Jet Activity and the Mexican Monsoon. Chen et al

MS-3

Variability of Precipitation and Atmospheric Circulation over South America during the Southern Summer 1999-2000 Kousky

MS-4

Trend-, ENSO-, PDO, and AO- related Precipitation and Surface Air Temperature Variability in the Americas Mitchell, Wallace and Ropelewski

Modeling Studies (Session Organizers: Rong Fu and Andrea Hahmann)

MS-6

Interannual Variability of the North American Monsoon: Preliminary Results of a Modeling Study Using the UCLA AGCM. Ferrara and Yu

MS-7

A Variable-Resolution Stretched-Grid GCM Regional Climate Simulation: Studying Anomalous U.S. Summer Precipitation Events and their Links to the North American Monsoon. Fox-Rabinovitz and Berbery

MS-8

Regional Hydroclimate Variability Associated with North American Summer Monsoon. Kim and Ferrara

MS-9

Common Land Model and Comprehensive Land Data for Summer Monsoon Studies Zeng

MS-10

Evolution of the Large-Scale Atmospheric Conditions Critical to the Onset of Wet Seasons over Tropical South-America; Fu, Li, and Dickinson