Global Atmosphere Watch3... · 2016. 10. 18. · 1 2 Methods and procedures for data quality...
Transcript of Global Atmosphere Watch3... · 2016. 10. 18. · 1 2 Methods and procedures for data quality...
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Methods and procedures for data quality control in the GAW/WMO Aerosol measurement program
Paolo Laj CNRS‐U. Grenoble‐Alpes / U. HelsinkiWMO‐GAW SAG Aerosol Chair
Global Atmosphere WatchResearch Enabling Services
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Anthropogenic Forcing on Climate IPCC 2013
“the largest uncertainty to estimates and interpretations of the Earth’s changing energy budget”
–0.9 [–1.9 to −0.1] W m−2
(medium to low confidence) High regional variability
2.83 [2.26 to 3.40] W m–2
(high to very high confidence)Low regional variability
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Deadly Particles ….in the World
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Aerosol Components acting on RF and Health
Emission Sources
Intrinsic Optical Properties
4‐D Variability
Natural
Anthropogenic
SecondaryPrimary
Scattering
Absorbing
CoarseFine
Short‐lived
Relatively Long‐lived
UpperatmosphereNear‐surface
List of variables with established GAW‐SOPs
AQ C
GAW network for aerosol variables
• Data access through WDCA
• A large and increasingcommunity of users
• Need to ensure very highquality of data and highdegree of standardization
• A agreed protocols and traceability procedures
• A need for skilled
Standard Operating Procedures
• Recommended procedures for Aerosol measurements
• Inlet‐to‐data‐provision approach
• WIS compatible
• GAW – IP general procedures
User Requirements(RRR)
ScientificExpert
CommitteeWCC
SOP Recommendation
Approval by SAG‐Aerosol
Network Implementation in
(WCC)
Peer‐review
CEN / ISO
World Calibration Centers Aerosol
Capacity building
Calibration and intercomparison workshops
Reference instruments
Audits and site visits
Twinning Partnership
Advice in setting up aerosol programs (SOP)
World Calibration Center for Aerosol
Physics
World Optical DepthResearch and
Calibration Center
QA/QC loop in GAW Aerosol
On site audits
Instrument performance lab‐ check
Quality Assessment OK
No
WCC
Yes
WCC go/nogo
WDCANRT Specific use
(Copernicus)
Observation platform
TrainingTechnical/Data Mgt
GAW‐TEC
USERS
Increasing provision of GAW Aerosol data
2006 201610 41
Number of stations providing aerosolparameters record >10 years
2006 201638 146
Number of stations providing aerosolparameters to WDCA
2006 201616 >150
Number of Instruments checked by WCCAP
Essential contribution from EU commission
funding to:
NRT Data provision
2010 20166 39
Number of stations providing aerosolparameters in NRT to WDCA
Essential contribution from EU commission
funding to:
Increasing use of GAW Aerosol data
2010 2016500 >2000
Number of IP access to WDCA/month
Where Are the WDCA Users Located? Number of Unique Users (IPs) by Country (2015)
Associated publications Essential contribution from EU commission
funding to:
QA/QC in Contributing Networks to GAW
• Contributing networks are part of GAW strategy
• Should apply an established quality control protocoland provide a statement on the quality of itsdatasets.
• Evaluation of measurement quality is performed in association with the relevant World Calibration Center (WCC)
• High GAW Quality standards may not apply
• Compliance with GAW data policy
Work with Metrology Institutes towards iso‐standards
• Established collaboration with BIPM and associatedNMIs CEN/TC 264/WG 32 Air quality ‐ Determination of
the particle number concentration CEN/TC 264/WG 35 EC/OC in PM
• Reference Standard for Black‐Carbon Work towards BC definition (Petzold et al., 2013) METAS, NPL, TROPOS, FMI, PSI for the definition of a
BC standard CEN/TC 264/ WG35 follow‐up: evaluation of
equivalence between filter‐based and on‐line light‐absorption measurements
Future Issues regarding QA in GAW
Maintain Observing Platforms in operation (incl. skills of station operators)
Towards new Aerosol Calibration Centers Lidar CC, On‐line Aerosol Chemistry CCMissing Aerosol chemistry CC
Need for Regional Calibration Centers Promote establishment of Regional Networks outside Europe and N. America
Discussion with NPL India Regional training activities
Promote work with National Metrology Institutes
QA/QC policy with Contributing networks and Citizen observatories