Contributors to the Task Force on Hemispheric Transport of Air Pollution (TF HTAP):
An update on developments in the current HTAP multi-model exercises and the upcoming TF HTAP meeting calendar. Below, you will find more information on the following meetings (listed here in chronological order):
- January 7, Joint HTAP3-FIRES and AMAP SLCF Meeting, Online, 13:30-15:00 UTC
- January 8, HTAP3-OPNS Kickoff, Online, 13:00-16:00 UTC
- January 22, HTAP3-FIRES Metals, POPs, and Other Pollutants, Online, 13:00-16:00 UTC
- May 5-7, TFMM, Hybrid Meeting, RIFS, Potsdam, Germany
- May 7-9, TF HTAP, Hybrid Meeting, RIFS, Potsdam, Germany
Back-to-Back In-Person TFMM and TF HTAP Meetings, May 5-9, Potsdam
Firstly, we are excited to announce that the next TF HTAP spring meeting will be in person. After four years of online-only meetings, the next TF HTAP spring meeting will occur at the Research Institute for Sustainability – Helmholtz Centre Potsdam in Germany (previously known as IASS Potsdam) from May 7-9, 2025. This will be a hybrid meeting, with the possibility of online participation for those who can’t make it to Potsdam. We will hold this meeting back-to-back with the Task Force on Measurements and Modelling (TFMM), another task force under the Convention on Long-Range Transboundary Air Pollution, primarily focusing on regional modelling and measurements in the European region. We plan on holding a joint TF HTAP-TFMM session on May 7 to discuss areas of overlap between our two task forces. A full agenda will follow in due course. Please save the dates in your calendar for now (May 7-9 for the TF HTAP part and May 5-7 for the TFMM part).
HTAP3-OPNS Kickoff, Online, January 8
For those of you who are involved in the HTAP3-OPNS multi-model exercise, we thank you for your patience so far as we get closer to the start of the modelling phase of this work.
The description paper for HTAP3-OPNS is currently being prepared for submission to GMD. A read-only draft is available here: https://nextcloud.gfz-potsdam.de/s/NqgxtQb6ELJw76S.
We now have a preliminary version of the gridded GAINS scenarios, which we hope will be published soon on Zenodo. The derivative datasets based on the GAINS scenarios needed for the exercise are also now under construction. We will send another update to the htap-opns-announce email list when everything is available for download. We expect that this will be before the end of the year.
In anticipation of the input datasets being available, we would like to organize a kick-off meeting on January 8, 2025, from 13:00 UTC to 16:00 UTC. Further information on the agenda will be communicated on the htap-opns-announce email list.
HTAP3-FIRES and AMAP SLCF Meeting, Online, January 7
Similarly, the preparations for the HTAP3-FIRES multi-model exercise have also progressed.
The description paper for the HTAP3-FIRES exercise is currently under review at GMD and is available here: https://gmd.copernicus.org/preprints/gmd-2024-126/#discussion. We expect to be able to start modelling for aerosols, ozone, and N and S deposition in parallel to the OPNS work. Cyndi Whaley has organized a joint meeting between the HTAP3-FIRES team and the AMAP SLCF expert group to discuss prioritizing next steps as we launch the new experiments. The online meeting will take place on January 7 from 13:30 to 15:00 UTC. More details will be announced through the htap-fires email list.
HTAP3-FIRES for metals, POPs, and other pollutants, Online, January 22
Extending the emissions datasets for the HTAP3-FIRES experiments to cover metals, POPs, and other pollutants will take additional time. To discuss this further work, we propose holding an online meeting on January 22, 2025, from 13:00 UTC to 16:00 UTC. Further information on the agenda for this session will be communicated via the htap-fires email list.
Subscribing to Email Lists
For those of you who are not yet subscribed to the activity-specific email lists for the HTAP3-FIRES and HTAP3-OPNS, here are the instructions for subscribing:
- Send an email to sympa@listserv.dfn.de with the subject “subscribe htap-fires”
- Send an email to sympa@listserv.dfn.de with the subject “subscribe htap-opns-announce”
Update on HTAP3-MCHgMAP
HTAP3-MCHgMAP is progressing well, having completed an initial round of global baseline simulations with atmospheric, terrestrial, and ocean models for evaluation purposes. The current version of the experiment description paper is available at GMD at https://gmd.copernicus.org/preprints/gmd-2024-65/. The initial results were discussed at a joint MCHgMAP and GMOS-Train workshop in October, hosted by the Jozef Stefan Institute in Slovenia. Presentations from the workshop are available at https://portal.ijs.si/nextcloud/s/k5afbgFQ4NBpmjn. A second round of simulations is currently underway.
Thank you to all for your continued contributions to these efforts. We look forward to seeing you all online and in person in 2025.
Best regards,
Terry Keating, Tim Butler, Rosa Wu, and Jacek Kaminski
TF HTAP Leadership Team