David Skaggs Research Center, Room GC-402
325 Broadway, Boulder, Colorado 80305
May 3 and May 4, 2000

Wednesday, May 3, 2000 AGENDA

(Only presenter's name is given; please refer to abstract for complete author listing.)
(Click on presentation title to view abstract.)

Session 1 • Aerosols, Radiation, and Transport - J. Ogren
08:15 - 08:20 Welcome and Introduction
   D. Hofmann
08:20 - 08:40 Measurements of Aerosol Hygroscopic Growth
   A. Jefferson (CMDL)
08:40 - 09:00 CO and O3 Measurements at Cape Point
   J. M. Harris (CMDL)
09:00 - 09:20 The Non-Baseline Summer of 1998-1999 at Cape Grim
   N. Tindale (Cape Grim)
09:20 - 09:40 Modeling Thermal Radiative Fluxes at the Surface: MODTRAN4 and RRTM
   G. P. Anderson (CMDL/AFRL)
09:40 - 10:00 The WMO's Global Atmosphere Watch: Coordinating Long-Term Atmospheric Chemistry Monitoring in the New Millennium
   J. M. Miller (WMO)

• 10:00 - 10:20 Break

Session 2 • Halocarbons - J. Elkins
10:20 - 10:40 Results from New, In Situ Measurements of Methyl Bromide, Methyl Chloride, and HCFC-22 at NOAA Observatories
   G. S. Dutton (CMDL)
10:40 - 11:00 Atmospheric Methyl, Ethyl, and Propyl Halides in California and Over the Pacific Ocean
   J. C. Low (Univ. of Calif., Irvine)
11:00 - 11:20 Oceanic Measurements of Halocarbons in the North Pacific Ocean in Support of Flux Calculations
   D. B. King (CMDL)
11:20 - 11:40 Descent from the Mesosphere and Entrainment from the Stratosphere Observed in the Northern Vortex
   F. L. Moore (CMDL) -
11:40 - 12:00 New Airborne In Situ Trace Gas Measurements Reveal Large Scale Transport into the Lowermost Stratosphere
   E. A. Ray (CMDL)

• 12:00 - 13:00 Lunch

Session 3 • Carbon Cycle, Oxygen - R. Schnell
13:00 - 13:20 Atmospheric O2 Measurements in Temperate Forests
   B. B. Stephens (CMDL)
13:20 - 13:40 GLOBALHUBS - Global Quality Control for Long-Lived Trace Gas Measurements
   R. J. Francey (CSIRO)
13:40 - 14:00 Challenges of Integrating Independent Atmospheric Data Records
   K. Masarie (CMDL)
14:00 - 14:20 Exchange of Carbon Dioxide Between the Atmosphere and a Forest in Northern Wisconsin, USA
   P. S. Bakwin (CMDL)
14:20 - 14:40 Forging a link between AmeriFlux and GLOBALVIEW CO2
   K. J. Davis (Univ. of Minnesota)
14:40 - 15:00 Increases in Water Vapor in the Stratosphere
   S. Oltmans (CMDL)

• 15:00 - 18:00 Poster Session

Thursday, May 4, 2000 AGENDA

(Only presenter's name is given; please refer to abstract for complete author listing.)
(Click on presentation title to view abstract.)

Session 4 • Ozone Depletion - S. Oltmans
08:00 - 08:20 Near-Record Low Ozone Profiles Measured at South Pole Station During the 1999 Ozone Hole
   B. J. Johnson (CMDL)
08:20 - 08:40 Sampling Firn Air for Atmospheric Halocarbons
   J. H. Butler (CMDL)
08:40 - 09:00 Present and Future Trends in the Atmospheric Burden of Ozone- Depleting Halogens
   S. A. Montzka (CMDL)
09:00 - 09:20 Have We Observed the Propagation of the Peak of Chlorine into the Lower Stratosphere Where Ozone Loss Occurs?
   J. W. Elkins (CMDL)
09:20 - 09:40 Chlorine and Ozone in the Arctic Polar Vortex During the 2000 SAGE-III Ozone Loss Validation Experiment (SOLVE)
   D. Hurst (CMDL)
09:40 - 10:00 Comparing Models with MLO Sulfate Data: Just What Can You Learn from Observations at a Single Point?
   B. J. Huebert (Univ. of Hawaii)

• 10:00 - 10:20 Break

Session 5 • Climate Forcing - P. Tans
10:20 - 10:40 Simulated Correlations of Atmospheric Trace Species and Implications for Lower Stratospheric Transport
   L. Bruhwiler (CMDL)
10:40 - 11:00 Climate Change and Atmospheric Tides at Mauna Loa Observatory
   S. Ryan (CMDL)
11:00 - 11:20 Surface Solar Irradiance Related to Climate Forcing: An Example Derived from a Clear-Sky Transmission Record
   B. Bodhaine (CMDL)
11:20 - 11:40 Interannual Variations in Carbon Sinks Deduced From Measurements of O2/N2 Ratio and the Concentration and Isotopic Composition of Atmospheric Carbon Dioxide
   R. F. Keeling (Scripps)
11:40 - 12:00 The Growth Rate of Atmospheric Methane as a Constraint on its Budget
   E. J. Dlugokencky (CMDL)
12:00 - 12:20 The CO2 Growth Rate and the Global Carbon Sink, 1979-1999
   T. J. Conway (CMDL)

• 12:20 - 13:20 Lunch

Session 6 • Research Group Reports - J. Butler
13:20 - 1330 Introduction
   R. Schnell
1330 - 14:00 OAR's Role as "NOAA Research"
   Dave Evans
14:00 - 14:15 Observatory Operations: Recent Developments, Future Plans
   R. Schnell
14:15 - 14:30 Solar and Thermal Radiation in the Atmosphere: The Role of Observations in Climate Research
   R. Schnell for E. Dutton
14:30 - 15:00 Figuring Out the Global Carbon Cycle
   P. Tans

• 15:00 - 1530 Break

Session 7 • Research Group Reports (continued) - J. Butler
1530 - 16:00 Current Aerosol Research at CMDL
   J. Ogren
16:00 - 1630 Recent Developments on Ozone, Aerosol and Water Vapor Changes in the Stratosphere
   S. J. Oltmans
1630 - 17:00 Overview of the Halocarbons and Other Atmospheric Trace Species (HATS) Group
   J. Elkins

• 17:00 Adjourn

Poster Session Wednesday, May 3, 2000 AGENDA

(Only presenter's name is given; please refer to abstract for complete author listing.)
(Click on presentation title to view abstract.)

P-1 North American Measurements of Aerosol Light Absorption and Single-Scattering Albedo
   D. J. Delene, P. J. Sheridan, and J. A. Ogren (CMDL)
P-2 In Situ Aerosol Profiling Over the DOE ARM Southern Great Plains Cloud and Radiation Testbed Site
   P. J. Sheridan (CMDL)
P-3 Aerosol Levels and Chemistry at Macquarie Island
   N. Tindale, J. Seymour, and P. Pease (Cape Grim, Australia)
P-4 Optical Depth Measurements at CMDL Monitoring Stations
   B. A. Bodhaine, R. S. Stone, G. L. Koenig, E. G. Dutton, and J. Wendell (CMDL)
P-5 Experimental Technique to Estimate Cloud Effective Radius from Multiple Field of View Radiometer Measurements
   S. Cooper, J. M. Davis, and S. K. Cox (CSU)
P-6 CMDL Radiation Measurements as Part of the International Baseline Surface Radiation Network
   D. Longenecker, E. Dutton, and D. Nelson (CMDL)
P-7 A Pyrheliometer Comparison to Investigate the Use of Calcium Fluoride as a Window Material
   D. W. Nelson (CMDL)
P-8 Interannual Variability of UV and Ozone at Three Sites in the Alaskan Arctic
   R.L. Tatusko, B.A. Bodhaine, E. Dutton, and E.C. Weatherhead (CMDL)
P-9 Fifty years of monitoring geophysical data: USGS Barrow Magnetic Observatory
   J. Townshend (USGS, Alaska)
P-10 Measuring Thermal Radiative Fluxes at the Surface: Pyrgeometer Performance
   N. B. Wood, E. G. Dutton, R. Philipona, and G. Anderson (CMDL)
P-11 Modeling Surface Fluxes at the WLEF Tall Tower: Parameterization and Scaling Of Land Surface Models
   L. Prihodko, A.S. Denning, and M. Nicholls (CSU)
P-12 Simulated Exchange of 13C Between Terrestrial Ecosystems and the Atmosphere: Canopy Scale Observations and Modeled Results
   N. S. Suits, A. S. Denning, J. A. Berry and J. R. Ehleringer (CSU)
P-13 A Modeling Approach to Evaluate Tall Tower and Aircraft Sampling Strategies for Estimation of Terrestrial CO2 Fluxes
   M. Uliasz (CSU)
P-14 Carbon Dioxide Studies at the Pallas GAW Site in Northern Europe
   Y. Viisanen, J. Hatakka, J. Paatero, J.-P. Tuovinen, M. Aurela, and T. Laurila (Finnish Meteorol. Inst.)
P-15 Covariance of the Ecosystem Carbon Dioxide Flux and the PBL Depth at the Tall Tower in Northern Wisconsin
   N. Zhang, S. A. Denning, C. Yi, K. J. Davis, P. S. Bakwin, M. Branson (CSU)
P-16 Trace Gases and Mean Ages of the Air in the Arctic Winter Vortex From the SOLVE Campaign
   P. A. Romashkin, D. F. Hurst, J. W. Elkins, G. S. Dutton (CMDL)
P-17 RITS Project Update of Measured CFCs and Chlorinated Solvents
   T. Thompson and D. Nance (CMDL)
P-18 Raman Lidar Water Vapor Measurements at Mauna Loa Observatory
   J. E. Barnes (CMDL)
P-19 Stratospheric Aerosol Measurements Over Mauna Loa Observatory, Hawaii
   J. E. Barnes and D. J. Hofmann (CMDL)
P-20 Ozone Profile Research at the South Pole and the Use of Ozonesonde Data in Classrooms
   E. Bergholz (U.N. International School)
P-21 Teachers Experiencing Antarctica and the Arctic
   E. Bergholz (U.N. International School)
P-22 Results of International Dobson Spectrophotometer Intercalibrations Held Since 1996
   R. D. Evans, G. L. Koenig, S. J. Oltmans, D. M. Quincy, M. O'Neill, and M. Clark (CMDL)
P-23 Results of Various Intercomparisons Involving Dobson Ozone Spectrophotometers Operated in Umkehr Mode
   G. L. Koenig, S. J. Oltmans, M. A. Clark, R. D. Evans, D. M. Quincy (CMDL)
P-24 Atmospheric Ozone in Buenos Aires and Marambio: The Antarctic Ozone Hole
   E. A. Piacentini and M. D. Ginzburg (Nat. Meterol. Service, Argentina)
P-25 UV Spectroradiometer and Ozone Measurements at Mauna Loa, Hawaii, and Boulder, Colorado
   B. Bodhaine (CMDL)