National Facilities
ACTRIS NOx/VOC QA workshop 2025
Dear CiGas Users,
As in previous years, the annual QA/QC workshop focusing on VOC (Volatile Organic Compounds) and NOx (Nitrogen Oxides) data submission to the EBAS database was held online from 7 to 9 April 2025. Participants reviewed the data 2024 and shared insights through station-specific presentations.
All contributions and materials from the event are available for download below.
ACTRIS CiGas Team
7 April 2025 - VOC part
- Introduction - Ralf Tillmann - FZJ
- Introduction - Zoé le Bras - EMPA
- Presentations of the stations and review of their data
- Jungfraujoch - Stefan Reimann - EMPA
- Beromünster - Stefan Reimann - EMPA
- Auchencorth Moss - James Dernie - Ricardo
- Cilbolton - Agnieszka Sanocka - Ricardo
- Pallas - Heidi Hellén - FMI
- CMN (Monte Cimone) - Jgor Arduini - Uniurb
- Cape Verde - Beth Nelson - UYork
- Kosetice - Martin Beck - CHMI
- Hohenpeißenberg - Felix Klein / Anja Claude - DWD
- COPDD - Agnès Borbon - CNRS
- SIRTA - Lorna Foliot - CNRS
- Zeppelin - Chris Lunder - NILU
- SMEAR II (Hyytiälä) - Ilona Ylivinkka - UHEL
- Data review of the CiGas station data 2024 - Stefan Reimann / Livia Schneider / Pascal Rubli / Zoé Le Bras - EMPA
- Discussion of furher activities for VOCs - Ralf Tillmann - FZJ
8 April 2025 - CiGas Community meeting
- EBAS data archive and the ACTRIS data portal - Yong Lin - NILU
- NRT data delivery - Robert Wegener - FZJ / Thérèse Salameh – IMT / Stefan Reimann - EMPA
- EMEP campaign 2022/2024 - Robert Wegener - FZJ / Thérèse Salameh – IMT / Wenche Aas - NILU
- New European AQ Directive - NOx part - VOC part - Max Adam - NOx - FZJ / Thérèse Salameh - VOCs – IMT
- PTR-MS measurement guidelines - Thérèse Salameh – IMT
- Potential new sites, incl. exploratory sites; Potential new variables
- Taunus Observatory - Current status and plans for development - Marcel Zauner-Wieczorek - Taunus Observatory
- Flagging Combining NOx and VOC data - Anja Claude / Robert Holla / Felix Klein - DWD
- Labelling status; Auditing - Ralf Tillmann - FZJ
- External Data QA for VOC: possible changes - Ralf Tillmann / Peeyush Khare - FZJ
- Science Talks
- 30 years of VOC analysis in Switzerland - Zoé Le Bras - EMPA
- Recent insights on ambient oxygenated VOCs at the puy de Dôme atmospheric station during the ATMO ACCESS TNA RACLET campaign : instrumental comparison, composition and variability. - Agnès Borbon - CNRS
- OVOC working standards – Transferring metrological traceability to the field - Maitane Iturrate-Garcia - METAS
- Exploring the variations in ambient BTEX in urban Europe and its environmental health implications. - Xiansheng Liu – CSIC
9 April 2025 - NOx part
- NOx observations at different sites and visualisation of NOx data files submitted to the EBAS data archive - Robert Wegener - FZJ
- General aspects, prozess of visualisation - Robert Wegener - FZJ
- Auchencorth Moss
- Visualisation - Robert Wegener - FZJ
- CMN (Monte Cimone)
- Davide Putero - CNR
- Visualisation - Robert Wegener - FZJ
- Cape Verde
- Beth Nelson - UYork
- Visualisation - Robert Wegener - FZJ
- Hohenpeißenberg
- Robert Holla - DWD
- Visualisation - Robert Wegener - FZJ
- Kosetice
- Martin Beck / Jan Silhavy- CHMI
- Visualisation - Robert Wegener - FZJ
- COPDD (Puy de Dome)
- Aurelie Colomb - UCA
- Visualisation - Robert Wegener - FZJ
- MAIDO (La Réunion)
- Aurelie Colomb - UCA
- SIRTA
- Nicolas Bonnaire / Valerie Gros - CNRS
- Visualisation - Robert Wegener - FZJ
- Discussion of station data
- Discussion on further CiGas activities for NOx
- AOB
ACTRIS NOx/VOC QA workshop 2024
CiGas Data Workshop 2024/04/09 - 2024/04/11
As every year, we have discussed the VOC and NOx data that will be submitted to the EBAS database.
The workshop included:
- Review of the data for VOC and NOx data from the TC
- Presentations from the stations
- Scientific presentations
- Discussions on further activities
As in previous years, the workshop was held online and contributions can be downloaded below.
Agenda (CEST)
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VOC, Tuesday, 2024/04/09
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08:30 - 17:00 VOC
08:30-12:00 Review of VOC Data (All / EMPA)
- The discussion of each site should be accompanied with a short site presentation
14:00-17:00 Discussion on further CiGAS activities for VOCs
- PTR-MS Measurement guidelines; Status and discussion (60 min) IMT
- Quality checks: @VOC@ tool, discussion EMPA
- Potential new sites, incl. exploratory sites all
- Potential new variables all
- AOB all
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General, Wednesday, 2024/04/10
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08:30 - 10:00 Common Session
08:30 - 08:50 FZJ/IMT/EMPA/DWD/UHEL: CiGas overview: on-going implementation
08:50 - 09:20 NILU: ACTRIS and the EBAS data archive
09:20 - 09:35 FZJ/IMT/EMPA: NRT data delivery09:35 - 09:45 Agnés Borbon: Reactive Trace Gases in ACTRIS: Working Groups
09:40 - 10:00 all: Publication plans
10:15 - 12:00 CiGas Community meeting
10:15 -11:00 FZJ/all: Labelling status; Auditing
11:00 -11:30 DWD/EMPA/all: Exterrnal Data QA for VOC: possible changes
11:30 -12:00 Zoé Le Bras: 30 Years of BTEX monitoring at an suburban station in Switzerland
12:00 -12:30 Max Gerrit Adam: JUNOx NOx Intercomparison 2023
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NOx, Thursday, 2024/04/11
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08:30 - 16:00 NOx
08:30 - 12:00 All: NOx observations at different sites (15min/site) with 15min break and Visualization of NOx data files submitted to the EBAS data archive
11:00 - 11:30 FZJ/DWD: Visualization of NOx data files submitted to the EBAS data archive
Aurelie Colomb : NOx at La Réunion - MAIDO
Robert Wegener : Visualization of La Réunion - MAIDO NOx Data
Aurelie Colomb : NOx at Puy de Dôme
Robert Wegener : Visualization of Puy de Dôme NOx Data
Davide Putero : NOx at Monte Cimone
Robert Wegener : Visualization of Monte Cimone NOx Data
Anna Callaghan : NOx at Cape Verde
Robert Wegener : Visualization of Cape Verde NOx Data
Robert Holla : NOx at Hohenpeissenberg
Robert Wegener : Visualization of Hohenpeissenberg NOx Data
Martin Steinbacher : NOx at Jungfraujoch
Robert Wegener : Visualization of Jungfraujoch NOx Data
Jan Silhay : NOx at Košetice
Robert Wegener : Visualization of Košetice NOx Data
Laurent Poulain : NOx at Melpitz
Robert Wegener : Visualization of Melpitz NOx Data
Nicolas Bonnaire : NOx at SIRTA
Robert Wegener : Visualization of SIRTA NOx Data
Chris Lunder : NOx at Zeppelin Station
Max Gerit Adam: Notes on the NOx part

Hands-on workshop oganized by TROPOS ACD
OGTAC-CC call for ACTRIS related training activities on organic tracers and aerosol constituents within the framework of the CAIS-ECAC
ACTRIS Cloud Remote Sensing Workshop on May 19-20
Our next CCRES/CLU workshop will be held on May 19 (9-12am CEST) and May 20 (9-12 am CEST), online. These sessions are open to all and contributions from the CRS community are strongly encouraged.
Register here before April 11.
A preliminary agenda is available here.
For more information, please contact evillard@ipsl.fr.
Lidar QA/QC workshop 2024
CARS and ARES invite the Principal Investigators of the aerosol remote sensing facilities to discuss the status of the lidar QA/QC. The workshop is organized online, 9-12 December 2024. Each lidar has a dedicated 30 minutes time slot to clarify aspects related to performances of the instrument as identified through the QA tests, specifics and validity time period of the operational configurations, and data processing with the SCC.
Details about the format of the workshop are distributed via the aerosol remote sensing mailing list. Please contact Doina Nicolae (nnicol@inoe.ro) for additional information.
ACTRIS Cloud Remote Sensing Workshop November 2024
GENERAL INFORMATION
On November 7, CCRES will hold its annual on-site workshop for the Cloud Remote Sensing community in Matera, Italy, during the ACTRIS Week.
More information about the ACTRIS week can be found here.
The workshop will take place at the Casa delle Tecnologie Emergenti di Matera, Via San Rocco 1, 75100, Matera.
AGENDA
Topics covered during the workshop will be the following :
- New scientific results and technical developments at ACTRIS CRS sites
- Feedback from CRS sites concerning CCRES / CLU services
- Updates on CCRES services
- Updates on CLU services
- Updates on CRS NF labelling process
- EarthCARE Cal/Val (joint session with CARS)
Please find here the latest version of the agenda.
In case of any question, please contact evillard@ipsl.fr.
REGISTRATION
Registrations are now closed but remote participation is still possible. Please contact Elisa (evillard@ipsl.fr) if you are not registered and would like to participate.
PRESENTATIONS
Presentations are available here.
Fourth CCIce workshop (virtual)
The Center for Cloud Ice Nucleation (CCIce) would like to invite you for the fourth workshop on ice nucleating particle (INP) measurements. The workshop will be held online
October 21 and 25, 2024, 09:00 - 12:30
for all members of ACTRIS and CCIce, as well as interested scientist.
To better plan our meeting, we would like to ask you to indicate your participation at
https://terminplaner6.dfn.de/b/af94db47fe9b897e9f9dabd887922ea3-826550
Topics:
- CCIce implementation update and status
- Technical requirement and measurement guidelines
- Discussion about QA/QC for INP measurements within ACTRIS
ACTRIS Cloud Remote Sensing Workshop June 2024
The ACTRIS Center for Cloud Remote Sensing (CCRES) is organizing an online workshop on June 11, from 9 to 5pm CEST.
Please find below the workshop agenda.
09:00 – 09:15 |
Introduction and workshop agenda |
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09:15 – 10:45 |
Doppler Cloud Radar operational services
New research investigations
Microwave Radiometers operational services
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10:45 - 11:00 |
Break |
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11:00 - 11:45 |
Doppler Lidars operational services
Labelling operational services
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11:45 - 12:30 |
New developments at CLU (CloudNet Data Centre)
Feedback from NF on CCRES services/Discussion |
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12:30 - 13:00 |
New operational services
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13:00 – 14:15 |
LUNCH BREAK |
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14:15 – 14:45 |
Presentations
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14:45 - 15:30 |
EarthCARE Cal/Val activities |
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15:30 – 15:45 |
Break |
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15:45 - 16:30 |
Presentations
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16:30 - 16:45 |
Discussion and buffer time |
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16:45 - 17:00 |
Concluding remarks |
Presentations are available here.
For more information, contact ccres_contact@listes.ipsl.fr.
2nd CCWaC Workshop (virtual)
The Center for Cloud Water Chemistry (CCWaC) is pleased to invite you for the second dedicated workshop on cloud water sampling and chemical analysis. The workshop will be held as an online Zoom meeting on:
Tuesday, 16. January 2024, 13:00 – 17:00
Agenda:
- CCWaC Implemetation Update & Status
- First results from the recent collector intercomparison at the Schmücke
- Update on the technical requirements for cloud water chemical measurements
- Update on the measurement guidelines for cloud water chemical measurements
- Final details for the first Interlaboratory Comparison 2024
- Information and planning of further CCWaC activities in 2024
If you are planning to participate, please send a brief notice to dominik@tropos.de.
Please do not hesitate to contact us in case of questions!
Dominik van Pinxteren, TROPOS, (dominik@tropos.de)
Uwe Käfer, TROPOS, (kaefer@tropos.de)
Workshop on ground-based Microwave Radiometer Operation and Calibration
Workshop content
• Microwave radiometry background (theory, retrieval development)
• Practical aspects of MWR operation in ACTRIS and links to other networks (E-Profile)
• Calibration methods, hands-on calibration training with RPG HATPRO MWRs
• ACTRIS MWR data processing and quality control
• New developments in microwave radiometrY
Target group
The workshop targets operators of microwave radiometers in networks, such as the ACTRIS Cloud Remote Sensing network (Cloudnet), E-Profile and others. The workshop is also open for interested people beyond this network with interest on microwave radiometers.
How to apply
Please send an e-mail until 15 February 2024 to actris-ccres-mwr@uni-koeln.de including a short statement with your main motivation and interests.
Please provide following information:
- Are you currently operating a microwave radiometer? If so, which type?
- Which networks are you participating?
- Are you running special data processing or creating own retrieval algorithms?
The number of participants is limited, participants from ACTRIS National Facilities who have not attended previous workshops will be prioritized.
We will inform you about your participation shortly after the application deadline.
Contact
Bernhard Pospichal, Lukas Pfitzenmaier, Tobias Marke
e-mail: actris-ccres-mwr@uni-koeln.de
web: actris.eu/topical-centre/ccres/microwave-radiometer