1. Chief, Environment Division, WMO
WMO Global Atmosphere Watch(GAW) & Integrated Global Atmospheric Chemistry Observations (IGACO)
Leonard Barrie
Chief, Environment Division, WMO
Search Engine “GAW” 
UN-ECE LRTAP Task Force Brussels 1-3 June 05

2. The GAW Mission
Systematic Global Monitoring Of Chemical Composition of the Atmosphere.
Analysis and Assessment in Support of International Conventions.
Development Of Air Pollution and Climate Predictive Capability
The GAW2005 Workshop March 2005 WMO Geneva

3. Motivation
Air Pollution Forecasting, Health Effects, Long Range Transport and Deposition Effects
Improved Weather Forecasting:
By Including Aerosols, Ozone and Reactive Gas Observations
Climate, Climate Change and Climate Prediction
Oxidizing Power:The Atmosphere As A Waste Processor. Key to Global Hg and some POPs
Stratospheric Ozone Depletion and Surface UV Enhancement: Are Halocarbon controls working? Effects of UV on biosphere?
The GAW2005 Workshop March 2005 WMO Geneva

4. GAW Monitoring Components
SCIENTIFIC ADVISORY GROUPS:
AEROSOL OZONE GHGs
PRECIP-CHEM UV
REACTIVE GASES
QUALITY ASSURANCE-
SCIENCE ACTIVITY CENTRES
WCCs, RCCs, Projects
CENTRAL
CALIBRATION LABORATORIES
(World Reference Standard)
GAW STATIONS & GAWSIS
Global Regional
GAW WORLD DATA CENTRES:
OZONE/UV GHGs(& Related Gases) AEROSOL PRECIP-CHEM RADIATION
Analysis
Twinning
Workshops
Calibration, Training
Site Visits, Comparisons
Synthesis
IGACO
Contributing
Networks
Satellite
Observations
CAS/WG
Environmental Pollution And Atmospheric Chemistry(EPAC)
WMO/GAW Secretariat
AREP

5. GLOBAL STATIONS IN GAW Alert Ny Ålesund Point Barrow Pallas-Sodankylä80 80
Point Barrow
Pallas-Sodankylä
Mace Head
Zugspitze-Hohenpeissenberg
Jungfraujoch 40 40
Mt Waliguan
Izana
Assekrem -
Tamanrasset
Mauna Loa
Minamitorishima
Kenya
Bukit Koto Tabang
Samoa
Arembepe
Cape Point 40 40
Amsterdam Island
Lauder
Cape Grim
Ushuaia
160 80 80
160
Neumayer Station
March 2005
South Pole

6. © WCC-EMPA

7. Examples GAWSIS Statistics
GAWSIS STATION REGISTRATION
GAW DATA CAPTURE
Observatories by Source
Observatories by Region and Source
Total Column Ozone Capture
GAWSIS comprehensive on-line data-base | | search | update | inventory | audit |
supported by MeteoSwiss and Empa | contacts: and

8. The symbols represent different instrument types.
GAW GLOBAL TOTAL COLUMN OZONE NETWORK: Stations Submitting Data
The symbols represent different instrument types.
Compliments of WOUDC, MSC, Toronto {Ed Hare Manager}.

9. Compliments of WOUDC, MSC, Toronto {Ed Hare Manager}.
GAW GLOBAL OZONE SONDE NETWORK: Stations Submitting Data To WOUDC
The red triangles represent sites of GAW Contributing partner NASA/SHADOZ.
Compliments of WOUDC, MSC, Toronto {Ed Hare Manager}.

10. Ozone Assessment 2002 Chapter 4 Figure 4-4 (adapted from Fioletov) WMO/GAW Global Ozone Research and Monitoring Report # 47

11. GAW Global Carbon Dioxide Network {Major Partner NOAA/CMDL}

13. Ground based global AOD Networks “are currently mostly un-coordinated”
Latitudinal distribution
Polar regions: 4
Midlatitude North: 50
Tropics: 26
Midlatitude South: 10
Total 90
Major data gaps
Africa, Asia, India, Polar region and Oceans
International: AERONET, BSRN, GAWPFR, SKYNET
National: Australia, China, Finland, Germany, Japan, Netherlands, Russia, USA(4)

14. The GAW2005 Workshop 14-16 March 2005 WMO Geneva

15. “Need a systematic approach to observations” (Bad Breisig Oct 02 recommendation)

16. What Is The Integrated Global Observing Strategy (IGOS) Partnership?
The IGOS Partners include the:
Global observing systems
Global Climate Observing System (GCOS)
Global Ocean Observing System (GOOS)
Global Observing System (GOS) and the Global Atmospheric Watch(GAW) of the WMO
Global Terrestrial Observing System (GTOS)
Sponsors of the global observing systems
World Meteorological Organization (WMO)
U.N. Educational, Scientific, and Cultural Organization (UNESCO)
U.N. Environment Programme (UNEP)
Intergovernmental Oceanographic Organization (IOC)
International Council for Science (ICSU)
Food and Agriculture Organization (FAO)
Committee on Earth Observation Satellites( CEOS)
includes all national and regional government agencies with an Earth observing satellite system
Global change research programs
International Geosphere-Biosphere Programme (IGBP)
World Climate Research Programme (WCRP)
International Group of Funding Agencies for Global Change Research (IGFA)
WMO/CEOS Report was developed by Hilsenrath, Mohnen and Reading on the basis of international workshops in the US and Japan
June 2001 John Miller of GAW presented the case for IGACO to IGOS and it was accepted.
Guy Brasseur led the initial phase assembling the IGACO theme team.
Len Barrie and Jorg Langen with WMO and ESA support with the considerable resources of Peter Borrell former head of EUROTRAC as secretary will lead the next phase toward the production of the theme report.

18. IGACO TARGET VARIABLE LIST Stratospheric Ozone Depletion
 Chemical species
 Air Quality
 Oxidation Capacity
 Climate
  Stratospheric Ozone Depletion O3 
H2O (water vapour) CO
CO2
CH4
HCHO
VOCs
N2O
NOx = NO+NO2 HNO3
SO2
BrO, ClO, OClO HCl, ClONO2 CH3Br, CF3Br, CFC-11, CFC-12, HCFC-22
aerosol optical properties
actinic flux
The short list obtained after filtering according to the criteria in the previous slide . Emphasized that this is not finalized.

19. Example of a timeline diagram

20. Observations IGACO System
Integrated Global Atmospheric
Chemistry Observation (IGACO) System
Objectives:
To ensure accurate, comprehensive global observations of key atmospheric gases and aerosols;
To establish a system for integrating ground-based, in situ and satellite observations using atmospheric models;
To make the integrated observations accessible to users.
An IGOS theme
implemented by WMO
Observations
Satellite
IGACO System
An international process:
Panel of 19 experts from 12 countries and independent reviewers from 7 countries.
Aircraft
Products
Ground-based
NO2
Links to:
Space agencies, WCRP, GCOS, IGBP, IGOS themes
Ozone Depletion
Climate
Air Quality

21. Compliments of WOUDC, MSC, Toronto {Ed Hare Manager}.
GAW GLOBAL OZONE SONDE NETWORK: Stations Submitting Data To WOUDC
The red triangles represent sites of GAW Contributing partner NASA/SHADOZ.
Compliments of WOUDC, MSC, Toronto {Ed Hare Manager}.

22. GAW Global In Situ Surface O3 Network

23. Flight routes with regular observations

24. Satellite Column Observations From Low Earth Polar Orbiting Satellites

25. The IGACO System Components
Now GAW: Measurements, QA & Cal/Val, Data Archives

26. IGACO Implementation:
Top-Down Support Meets Bottom-Up Action
May 05
IGOS-Partners
GEOSS
IGACO Implementation Team
(Co-Chair WMO & ESA)
Scientific Advisory
Panel
Other WMO Programmes
IGACO Office WMO/GAW
USER
APPLICATION
ASSIMILATION-
REANALYSIS
MODELS
DATA QUALITY,
FLOW & SYNTHESIS
OBSERVATIONAL
SYSTEM
DEVELOPMENT
IGACO Relevant National, Regional, International Activities(examples below)
GEMS
ACCENT
AERONET
EMEP
EANET
WMO/GAW
NDSC
Satellite-programmes
NATCHEM
IMPROVE
IAGOS/MOZAIC)

27. IGACO Focii 2005-2010 Climate IGACO- LRTAP IGACO- Aerosols
IGACO-GHG WMO/GAW,
IGCO, GCOS
Climate
IGACO- LRTAP
(PM, O3)
TF of UN-ECE LRTAP WMO/GAW, UNEP,
Regional Programmes
Air Quality/Human Health & Ecosystem Health
IGACO- Aerosols
WMO/GAW, NASA,
Research
Programmes
Climate
IGACO-Ozone
WMO/GAW, IO3C
Ozone/UV & Climate

28. WMO
THANK YOU
The GAW2005 Workshop March 2005 WMO Geneva