The Use and Usability of Satellite Data for Tropospheric Research

Report from the 3rd Workshop

Third Workshop

The third TROPOSAT workshop took place in the Main Conference Room at ESA/ESRIN, Via Galileo Galilei CP 64, I-00044 Frascati Italy

on Thursday and Friday, 5th and 6th of April 2001


(* designates actions with the name of the person responsible following in brackets)

Reports and News

1. Welcome. Opening the workshop at 14.00, the subproject coordinator, Ulrich Platt welcomed the 36 people attending. Apologies had been received from 19 principal investigators (PIs), 5 of whom had sent representatives. There was no news of the one remaining PI. A list of those attending is attached.

2. Claus Zehner (ESRIN) gave a talk on "Current activities in ESA/ESRIN", and indicated how the support is organised and what is expected of TROPOSAT.

* The workshop decided:

* to submit, if possible, an article about TROPOSAT to the next ESA Bulletin. (Borrell)

* to prepare a series of articles (3 to 4 pages each with pictures) for the Earth Observation Quarterly in 2002 (review at the next workshop).

3. Markus Reuther (EUROTRAC-2 ISS) gave a talk on "Recent developments in EUROTRAC-2", mentioning the favourable results of the mid-term review and the on-going discussions about the future after the end of EUROTRAC-2. TROPOSAT members are encouraged to attend the EUROTRAC-2 Symposium in Garmisch-Partenkirchen next March.

* The workshop requested that a letter be written to the ISS expressing their strong support for a further phase of a EUROTRAC - type project supporting European co-ordination in atmospheric research. (Borrell)

4. Ulrich Platt, coordinator, reported:

- that although the year since the first workshop had been hectic, it had been fruitful with encouraging progress. It was now essential that the interaction within the task groups increased and that there should be active contacts between the task groups;

- the formation of a new IGBP project, SOLAS (Surface Ocean Lower Atmosphere Project) where satellite observations are expected to be a key element;

- there had been a successful session on "probing the troposphere from space" at the EGS Symposium in Nice, and that it was hoped to make this an annual event.

5. Peter Borrell, deputy coordinator reported on activities since the last workshop.

- The annual reports from the task group leaders, written on the basis of those from the PIs, had now been received and the general overview is in preparation. It is hoped to complete it before the end of April.

* PIs are requested to submit lists of publications, successful EU applications and theses for the report (Borrell).

- The web page is now operational and is being updated by including the annual report. Pictures (with explanatory captions) for the results section are always welcome.

- A data protocol has been obtained from Geir Braathen at NILU and will be adapted for use within TROPOSAT.

- Data exchange is essential to the success of TROPOSAT and it would be helpful to record what data has been exchanged.

* The workshop recommended that a list of tropospheric data available should be established on the web page together with links to the appropriate pages and contacts. The data protocol should also be included. (Borrell)

- The EUROTRAC-2 Symposium will take place from the 11th to the 15th March 2002 at the Kongresszentrum in Garmisch-Partenkirchen. It is hoped that all PIs will submit a poster of their current work and also attend the TROPOSAT workshop to be held there.

Scientific Presentations

6. The GEO-SCIA system. John Burrows, deputy coordinator, gave a presentation on the need for and likelihood of obtaining a geostationary satellite with instrumentation to measure concentrations of trace substances in the troposphere. It should be possible to obtain diurnal measurements over one third of the globe, such measurements being needed to study the formation of NOx by lightning, volcanic eruptions, biomass burning and the export of emissions on a continental scale.

* The meeting expressed its support for the project and requested that:

- modelling support be offered to the proposal for GEO-SCIA (Dameris, Granier);

- the subproject coordinator write a letter of support to the appropriate authority. The letter should be circulated to the PIs for comment before despatch (Platt, Borrell).

7. Task group meetings. The workshop split into four groups to allow the task groups to meet for an hour.

8. Task group 1: Development of algorithms

Andreas Richter and Thomas Wagner reported that the group had made substantial progress since the last workshop; the group was in good shape with a lot of research activity going on. However two of the twelve contributions were not funded, there had been little validation so far, some of the aims were looking rather ambitious with the time available, and one or two contributions seems be focussed more on the stratosphere than on the troposphere. Short presentations were then given by the following PIs.

Jochum Landgraf (for Albert Goede)

Roeland van Oss (for Hennie Kelder)

Andreas Richter

J.C. Lambert (for M. van Roozendael)

Andreas Richter (for Martin Riese)

Gabriele Stiller

Jean Verdebout and Reggis Borde

Thomas Wagner

Mark Weber

Olaf Tuinder (for Renate Winter-Sorkina)

Martin Müller (guest)

9. Task group 2: Use of satellite data to understand atmospheric processes

Martin Dameris reported that the group was active and successful. The necessary data was being obtained from the algorithm groups and an inter-comparison of model results was being prepared for the next year. Short presentations were then given by the following PIs.

Martin Dameris

Claire Granier

Andrea Weiss (for Peter Hofer)

Mark Lawrence

Ulrich Platt

Jörg Heland (for Hans Slager)

Martin Dameris (for Andreas Stohl)

Andrea Weiss

10. Task group 3: Synergistic use of different instrumentation

Gary Corlett (on behalf of Hermann Smit and Paul Monks) reported limited progress although this was to be expected as task group 3 relied on the prior work by the other task groups. There was also appreciable overlap with the other task groups and it may be worthwhile trying to clarify the responsibilities between various groups. Short presentations were then given by the following PIs.

John Burrows

Gary Corlett (on behalf of Alan Marenco)

(on behalf of Paul Monks)

(on behalf of Hermann Smit)

(on behalf of Martine de Maziere)

(on behalf of Ralf Sussmann)

* In the discussion it was stated that, as the project developed, the steering group would be happy to receive suggestions for re-definition of the task group aims. (Task group leaders)

11. Task group 4: Validation of tropospheric satellite data

Hennie Kelder reported substantial progress within the group; a strategy was developing, data had been obtained or was being exchanged, and much work was envisaged for the coming period. Short presentations were then given by the following PIs.

Hendrick Elbern

Rodolfo Guzzi

Hennie Kelder

Hennie Kelder (on behalf of Ilse Aben)

(on behalf of Cornelius Blom)

(on behalf of Bo Galle)

(on behalf of Rudi Zander)

(on behalf of Wolfgang Junkermann)

12. Underpinning activities

Data assimilation techniques. David Lary gave a talk on Chemical Data Assimilation showing that, in a multi-variate system, the use of intelligent interpolation lead to a better use of the available information, as well as providing criteria with which to validate models and data.

Specifications for future satellite instrumentation. Albert Goede, who was unable to be present, had reported that the main priority at the moment was GEO-SCIA which had been dealt with by John Burrows in item 6.

Other Decisions and Actions

13. Date of next workshop; future activities. The activities envisaged for the future are:

4th workshop: 29th & 30th November 2001 in Cambridge (Borrell & Lary).

5th workshop: during the EUROTRAC-2 Symposium (11th-15th March 2002) in Garmisch-Partenkirchen.

6th workshop: Autumn 2002 at ESRIN in Frascati.

"Final" Workshop: Spring 2003, possibly at KNMI, de Bilt.

14. Other business (not on the agenda)

EU Projects. It would be desirable to have a list of EU projects, in which TROPOSAT PIs are involved, on the web page (Borrell).

IGACO. An approach from Volker Mohnen was reported suggesting a link between TROPOSAT and the proposed IGACO (Integrated Global Chemistry Observations) initiative.

* The meeting requested Peter Borrell to act as the initial liaison.

COST. A suggestion had been made that TROPOSAT should become a COST action. This would bring some advantages to the co-ordination and helping some people to attend meetings.

* The meeting requested that the possibility be further explored with a view to making an application towards the end of the year (Borrell).

15. Summing up & closing remarks. Ulrich Platt, the coordinator, closed the workshop by commenting on the success of a most friendly and productive workshop. The work done in the next period will clearly be crucial to the success of the project.

* Thanks were expressed to:

- ESRIN for providing the excellent facilities;

- Claus Zehner and Christina Violetti for making the local arrangements and for finding such an excellent place for the meal together;

- Peter Borrell for arranging the meeting;

- the speakers, task group leaders and participants for their contributions;

- Ulrich Platt, for his Chairmanship.


Peter Borrell, Deputy Coordinator
April 2001


Return to the home page