November 2008

www.geomon.eu

Philippe Keckhut Service d’Aéronomie/IPSL

P. Ciais, C. Textor, M. Logan, CEA/LSCE, F; E. G. Nisbet, RHUL, UK; B. Buchmann, J. Klausen, Empa, CH;

G. de Leeuw, UHEL, Finland; M. De Mazière, BIRA-IASB, B; M. Schulz, P. Rayner, CEA/LSCE, F; S. Godin-Beekmann, SA, F;

K. Torseth, NILU, NO & GEOmon partners

Global Earth Observation and MonitoringGEOMON

November 2008

www.geomon.eu

Scientific Questions

• What are the regionalregional European trendsEuropean trends and variability of atmospheric composition in relation to changes in surface emissions?

• How to validate andvalidate and integrate satellite integrate satellite observationsobservations with ground-based and airborne observations to obtain a coherent picture?

• What are the global trends of atmospheric global trends of atmospheric compositioncomposition and how to reduce the uncertaintiesreduce the uncertainties of surface emissions and atmospheric processes?

November 2008

www.geomon.eu

GEOMON : GEOSS atmosphere

GEOmon is a prototype for a European contribution to GEOSS

November 2008

www.geomon.eu

GEO and GEOSS…

• GEO is an Intergovernmental Organization– 65 Nations – European Commission– 43 Participating

Organizations• With a simple objective:

To establish a global, coordinated, comprehensive and sustained system of Earth observing systems,

GEOSSCourtesy Dr. Brendan Kelly GEO Sec.

November 2008

www.geomon.eu

Operational system for climate?

November 2008

www.geomon.eu

But also….

• Satellites have a limited lifetime• Successive satellites need inter-calibration even with similar experiment

onboard• Ground-based network are required• Ground-based instruments are supposed to be supported by national

agencies. Few ideas of consolidate costs :– Lidar profile: 1 k€– Ozonesonde: 2 k€– Spectrometers 50-100 k€

• Ground-based networks are not operational yet • Becoming operational has a larger cost

November 2008

www.geomon.eu

GEOMON Objectives

• Build an integrated pan-European atmospheric observing system of greenhouse gases, reactive gases, aerosols, and stratospheric ozone.

• Quantify and understand the ongoing changes of the atmospheric composition

• Integrate ground-based and satellite observations

November 2008

www.geomon.eu

Act 6:

Data dissemination

GEOmon Data Center

Outreach

User Interfaces

Projects

Organizations

Policy

Act3: Aerosols

& Climate

Act2:Reactive Gases

& Pollutants

Act1:Greenhouse

Gases

Act4: Stratospheric

Ozone

Act

5: M

ode

ling

an

d In

tegr

atio

n

Surface & profile

in-situ

observations

Surface, profile, column remote sensing observations

Integration & Harmonization

Modeling

Selecting representative sites

Processing & Trend Analysis

GEOmon Project structurehttp://www.geomon.eu/

November 2008

www.geomon.eu

High towersSurface observatories Flask sampling sites

Activity 1 - Greenhouse gases

Observations:• In situ monitoring of CO2 and CH4• Airborne measurements of global distributions of CO2 and CH4• Solar (near-infrared) Fourier Transform Infrared spectrometers

across Europe

Products • Near Real time greenhouse gas in situ data• Integrated CO2 and CH4 global products combining atmospheric

assimilation models, ground based data and remote sensing fields, in linkage with existing modelling projects

• Assess potential of satellite observations for constraining European sources of CH4 and CO2

Air-borne sampling

November 2008

www.geomon.eu

• Network of networks of surface reactive gases measurementsNetwork of networks of surface reactive gases measurements Quality assured, harmonized, and regionally representative data sets in the European boundary-layer using long-term surface observations. -

• Airborne monitoring of the free troposphere Airborne monitoring of the free troposphere Provide quality assured and integrated chemical composition measurements of the global free troposphere, with focus on O3 and CO from CARIBIC.

• Network of ground-based remote sensing measurements for Network of ground-based remote sensing measurements for satellite validationsatellite validation Link data from ground-based remote sensing networks and passenger aircraft programs to satellite measurements, in synergy with model studies.

Activity 2 - Pollutants & Climat

Year1990199520002005

Key species: CO, O3, NO2

November 2008

www.geomon.eu

Activity 3 - Aerosols and Climate

• Harmonize and quality-check dataHarmonize and quality-check data from ground-

based in-situ and remote sensing measurements

• Create of the European Network of Aerosol European Network of Aerosol

Observation NetworksObservation Networks (ENAN) data base,

complementary to satellite data.

• Assess the 4-D aerosol distribution4-D aerosol distribution over Europe

using ENAN

November 2008

www.geomon.eu

Activity 4 - Stratospheric O3 & Climate

• Continued monitoringmonitoring of O3, NO2, BrO, Cly/Fy, T, H2O, aerosol/PSC from ground (NDACC) and space

• Homogenisation and consistency of time seriestime series

• Identify linkslinks between stratospheric OO33 and climateclimate changes.

• Insure satellite continuity

November 2008

www.geomon.eu

Integration & Modeling Studies

• Develop integrated data productsintegrated data products combining assimilation model results, ground-based data and remote sensing fields

• Improve satellite retrievalssatellite retrievals

• Analyze long-term trendslong-term trends in existing model results and check consistency with trends in observations

• Constrain budgetsbudgets

• EvaluateEvaluate global & regional modelsmodels with GEOMON data

• OptimizeOptimize measurement networksmeasurement networks through comparisons between observed and modeled tracer distributions

November 2008

www.geomon.eu

Geomon satellite remote sensing list

November 2008

www.geomon.eu

Europeen atmospheric data

• Lot of Networks local->national->international• Networks with real added values • Similar data include in different networks• Similar data generated for different purposes• Different data policies• Different qualities• Acces difficult• No unique catalog, format, metadata

• Many initiatives (Projects, agencies) Aircraft

(0 - 20km)

Satellite(0 - ~100km)

10

1

0.01

0.1

100

Free Troposphere

Stratosphere

Boundary layer

Tall tower(~500m)altitude

(km)

Surface air

BrO CH4

Cly COCO213CO2

CO18OFyH2

HCHO H2ON2ONOx

O3

PSCSF6

TempAerosols

Outgoing IR

Reflected solar radiation

Laser

November 2008

www.geomon.eu

Towards a “one-stop shop” for European atmospheric composition observations

Existing databases have a large added value:• Quality check• Share technology & methodology improvements• insure network homogeneity• International connections

November 2008

www.geomon.eu

Towards a “one-stop shop”:Towards a “one-stop shop”:

Establish a common GEOMON Data Centrecommon GEOMON Data Centre for atmospheric composition parameters, including near-real time data products

- Virtual data base at NILU http://geomon.ipsl.jussieu.fr/data/Datdata_dataNILU.html- Common search facilities for and acess to : • GEOmon-funded data • External data

National & international databases of past and ongoing scientific projects, and other relevant activities

- Tools for data viewing and description

GEOMON Data Centre

November 2008

www.geomon.eu

Conclusions

• GEOmon is a prototype for a European contribution to GEOSS

• GEOMON will developed a “one-stop shop” for European atmospheric composition observations

• GEOMON data center will be a virtual data base, a portal towards existing data bases

• Inter-operability and metadata are big issues• Models contribute to better evaluate measurement

distributions• Cost for operational ground-based network need to

be found