The Use and Usability of Satellite Data for Tropospheric Research

Report from the 6th Workshop


The sixth TROPOSAT workshop took place at the KNMI, de Bilt
on Thursday and Friday 21st and 22nd November 2002

(* designates actions required from the named person)

1. Welcome. The workshop opened at 09.30 with a welcome by the subproject coordinator, Ulrich Platt and by Hennie Kelder and Roeland van Oss, the local hosts. Some 45 principal investigators (PIs), co-workers and guests attended; apologies had been received from 18 PIs; there was no information about a further 2 PIs. A list of those attending is attached.

2. TROPOSAT: the future.

a. Present status within EUROTRAC-2; the subproject coordinator, Ulrich Platt, reported that EUROTRAC-2 would finish at the end of 2002. The ISS would continue for a few months into 2003 to finish the final report and to organise an "event" in March.

b. TROPOSAT-NET and TROPOSAT-IP; the deputy coordinator, Peter Borrell, reported that submissions had been made in response to the call by the EU for Expressions of Intent. Apparently some 1600 such applications had been made and, unfortunately, although we had a genuine case, our initiatives were unlikely to be funded.

c. Possible TROPOSAT contribution to ACCENT; the subproject coordinator, Ulrich Platt, reported that ACCENT, a proposal for a large atmospheric chemistry network to be coordinated by Sandro Fuzzi in Bologna, was likely to be funded by the EU. John Burrows had been in contact and it seems that the proposers would welcome a TROPOSAT contribution.

* The workshop accepted the offer of Paul Monks to attend the ACCENT planning meeting on December 12th in Brussels.

3. News

a. SCIAMACHY: Albert Goede (PI, task group 1)and John Burrows (deputy coordinator) reported that SCIAMACHY is performing well and has been sending back data for several months.

There are some problems however.

- There is some icing on some of the infrared detectors which was attributed to out-gassing from SCIAMACHY itself. It is hoped that this will diminish with time.

- There are delays in the delivery of the SCIAMACHY data products due to software problems.

- The delays with the data delivery are hindering the validation, and it seems unlikely that validation will be complete before a number of the contracts run out.

* The workshop expressed the hope that every effort would be made by those responsible to expedite the delivery of the promised data products, and that funding would be found to ensure that the validation can be fully completed.

b. MIPAS: Gabrielle, Stiller (PI, task group 1) reported that the instrument was performing well.

During recent months there have been some data gaps; one was due to vibrations in the cooling system which have been repaired by switching to another operation mode, but others are under further investigation; ice on the detectors has been identified, but does not cause trouble to the performance of the instrument.

Another data gap was due to the switching off of the ENVISAT platform during a meteorite shower.

A jump in the line-of sight pointing has been detected during level-2 processing, caused by a correction manoeuvre of the platform. It is hoped that information on events like this will be included in the level-1b data product to improve the a priori pointing information.

Progress has been made with level 2 data, but because of data gaps, full validation has been difficult so far. Data for validation have been made available for all major geophysical validation campaigns held so far.

c. OMI; Pieternel Levelt (guest), reported on the OMI instrument, a joint European, North American venture which will be launched by NASA in 2004. The instrument has now been delivered for testing. It will be able to study O3, NO2, SO2, BrO, HCHO, OClO, aerosols, cloud coverage and cloud top pressure, with a high spatial resolution and, so has great potential for studying tropospheric pollution.

d. GEOTROPE; Paul Monks (Leader, TG3) reported that some modifications had been made to the specifications to improve the resolution and so improve its capabilities still further for measuring and monitoring air pollution. The mission has however still not been accepted by ESA. A multi-pronged strategy is being devised to secure acceptance and funding.

e EUMETSAT; Hennie Kelder (Leader, TG4) reported that the meteorological organisation, EUMETSAT, is considering the measurements that should be made with a geostationary satellite from the year 2115 onwards. It is recognised that monitoring is necessary to observe the changes taking place in the atmosphere, and it is likely that a number of chemical components will be included in the specifications.

f. TROPOSAT, Peter Borrell, deputy coordinator, reported the following.

- The Annual Report, 2001, was published in the summer. All PIs should have received a copy.

- TROPOSAT has a new web page:

- IGACO: the coordinators and Hennie Kelder (Leader, TG4) attended an inaugural meeting at the WMO in Geneva, chaired by Guy Brasseur. The initiative is intended to specify and promote the long-term development of an integrated observing system for atmospheric chemistry, which will certainly include satellite observations.

4. TROPOSAT Final Report; there were progress reports from the following people.

a. PI contributions: Peter Borrell; about three quarters of the PI reports had been received and a number more were promised.

b. Task Group 1; Andreas Richter and Thomas Wagner; on target for delivery.

c. Task Group 2; Martin Dameris; on target for delivery.

d. Task Group 3; Hermann Smit and Paul Monks; on target for delivery.

e. Task Group 4; Hennie Kelder; on target for delivery. Ankie Piters is in charge of the preparation.

f. Data Assimilation; it was reported that Hendrick Elbern would provide a report.

g. Future Instrumentation; Albert Goede. There was a discussion on what should be included. The writer was requested to use his discretion; suggestions made were the application for GEOTROPE and a list of future satellites which tropospheric capabilities.

h. US activities; it was reported that Jerry Ziemke would provide a report on North American activities.

i. Overview: Peter Borrell, Ulrich Platt & John Burrows. The overview would include the task group reports. It would submitted in December if possible to the ISS for inclusion, together with reports from the other subprojects and a synthesis and integration in a final report on EUROTRAC-2 as a whole. The full TROPOSAT report (overviews and PI reports) would be submitted to the ISS in January for publication as book.

5. Task Group Meetings

The workshop adjourned to allow the separate task groups to meet for an hour. Among the subjects they discussed were the preparation of the final report with special reference to the following topics.

6. Presentations by the Task Groups and the Coordinators for Underpinning Activities

a. Scientific highlights & presentations by task group 1. Andreas Richter and Thomas Wagner gave a brief overview.

The following presentations were then given by or on behalf of task group 1 PIs.

Jochum Landgraf

Roeland van Oss (on behalf of Hennie Kelder)

Johannes Keller

Andreas Richter

Martin Riese

Andreas Richter (on behalf of M. van Roozendaal)

Gabriele Stiller

Arnolds Ubelis

Andreas Richter (on behalf of Jean Vanderbout)

Thomas Wagner

Olaf Tuinder

Anton Kaifel

Paul Monks (on behalf of John Remedios)

An apology had been received from Mark Weber.

b. Scientific highlights & presentations by task group 2. Martin Dameris gave a brief overview.

The following presentations were then given by or on behalf of task group 2 PIs.

Jorg Heland (on behalf of Hans Schlager)

Andrea Weiss

Martin Dameris (on behalf of Andreas Stohl)

Martin Dameris (on behalf of Nicholas Savage)

T. Kunhikrishnan (on behalf of Mark Lawrence)

Martin Dameris

Ulrich Platt

Maarten van Loon (on behalf of Peter Builtjes)

No information had been received from Garry Hayman and Claire Granier

c. Scientific highlights & presentations by task group 3. Hermann Smit and Paul Monks gave a brief overview

The following presentations were then given by or on behalf of task group 3 PIs.

John Burrows

Franz Slemr (on behalf of Carl Brenninkmeier)

Hermann Smit

Hermann Smit (on behalf of Valérie Thouret)

Ralf Sussmann

Paul Monks

Apologies had been received from Martine De Mazière

A final report had been received from A.R. MacKenzie

d. Scientific highlights & presentations by task group 4. Hennie Kelder gave a brief overview.

The following presentations were then given by or on behalf of task group 4 PIs.

Johan Mellquist (on behalf of Bo Galle)

Wolfgang Junkermann

A.G. Straume (on behalf of Ilse Aben)

Hennie Kelder

Henk Eskes (on behalf of Hendrick Elbern

Apologies had been received from Alexander Meister and Rudi Zander

No information had been received from Cornelius Blom.

e. Presentations on Underpinning activities

i. Specifications for future satellite instrumentation, Albert Goede gave a brief overview.

ii. Data assimilation techniques, Hendrik Elbern was unable to attend.

7. Future Activities

The workshop considered specific suggestions for action about the future of TROPOSAT. The possibilities that should be pursued are as follows.

a. To try to ensure the continuation of the project in the present form by seeking a continuation of the funding for coordination from ESA/ESRIN.

b. To contact Sandro Fuzzi in order to participate as a subproject in ACCENT.

c. To submit a proposal, in response to the next call, to form an EU Integrated Project.

8. Next Meeting

The next TROPOSAT workshop will be held at ESRIN, Frascati on Thursday and Friday, the 8th and 9th of May, 2003. The main business will be the formulation of the second phase.

9. Any other business

a. OMI. Pieternel Levelt (guest) asked about participation in TROPOSAT by the OMI community. The subproject coordinator, Ulrich Platt, stated that they would be most welcome to participate in TROPOSAT in the future.

b. ENVISAT session at the EGS in Nice, 6th 11th April, 2002. Gabrielle Stiller is organising the session AS9.03

The ENVISAT atmospheric chemistry instruments: The first year

and invites all TROPOSAT participants to contribute. Information from: and

The workshop concluded at 15.00 on Friday 22nd of November with thanks by the subproject coordinator, Ulrich Platt, to Roeland van Oss, Henk Eskes and Hennie Kelder for making the local arrangements and to the KNMI for providing the excellent facilities and generous hospitality.


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