Education and Outreach Subcommittee (EOS) Newsletter
Spring 2025

Hello, NADP members. This newsletter is an outlook on major upcoming events, product updates, and recent milestones across NADP. Currently, this newsletter is shared twice per year, in between the fall and spring meetings.

Spring 2025 Meeting: Planning for the 2025 NADP Spring Meeting is well underway by the Program Office and the Network Operations Subcommittee (NOS). This meeting is an opportunity for the Technical Subcommittees and Science Committees to work on issues related to NADP management, network operations, and advancing deposition science. The Spring meeting will be held at the Madison Concourse Hotel from midday Monday, May 12 - Friday, May 16, 2025. You can register for this no-cost hybrid meeting and find information about the hotel and the block agenda at https://nadp.slh.wisc.edu/spring2025/. To receive the government rate, make sure to book your hotel rooms by April 18, 2025. For additional information regarding the structure of the Spring Meeting, please see the overview provided by NOS below.

Science Symposium Schedule Change: After much discussion following the 2024 NADP Fall Meeting, the executive committee has decided to move our annual science symposium from the Fall to the Spring. This means that there will be no science symposium in Fall 2025 and the next one will be held in Spring of 2026. We will still plan on having a "business meeting" in the fall and more details will be discussed when we meet in Madison in May for our Spring 2025 Meeting.

Data updates: Over the past several months, we have made changes to the multilayer data review. These changes will improve our data review process and speed for the long-term and meet our 30 day publish to the website goal after receiving the data from the labs. The NTN and AMoN data are now uploaded for November 2024 and MDN is updated to October 2024. We hope that this helps with your data needs!

Website updates:

1. Multiple updates have occurred on the Operators Support > View Precipitation page. These include new charts as well as improved precipitation record reporting. Details can be found in a website news post: https://nadp.slh.wisc.edu/news/web-site-updates-operator-support-precipitation-data
2. The Data Export utility on the network and site pages has been updated. Updates to the API will improve the deposition and aggregated reports.
3. The structure of the exported file names are now detailed in a metadata document for all networks with the exception of MLN.
4. The AMoN Export utility changed from delivering dynamically coded data to statically coded data. Details may be found in the Data Notices and News sections.(https://nadp.slh.wisc.edu/news/amon-data-processing-updates/)

Updates:
New member: We would like to welcome our new State Agricultural Experiment Stations (SAES) representative on the Executive Committee, Jeffrey Collett. Dr. Collett’s experience in advancing air quality measurements, novel assessments in Rocky Mountain National Park, and commitment to active student participation in NADP will continue to be an asset for the program.
Network sustainability: We have been working on enhancing NADP network sustainability. The committee, in collaboration with the network optimization ad hoc group formed at the 2024 Fall Meeting, is preparing recommendations for program efficiencies ahead of the spring meeting. The intent of these changes are to allow for flexibility amidst fluctuating budget security, while maintaining spatial and temporal data quality across networks. Thank you to everyone that has already provided feedback on potential network changes.

NADP science committees: science committees are focused on key areas of atmospheric deposition, scientific interest and/or applications.

Updates:
The AMSC continues to meet and has convened subcommittees to address siting requirements and sensor data collection and management. Interest is growing as sensor technologies improve, costs to own and operate decrease, and PollenSense promotes their technology to additional interested parties. AMSC holds large group meetings quarterly and anyone interested in aeroallergen issues is invited to participate. Please contact Jayde Alderman (jayde.alderman@wsp.com) for more information or look at posted meeting minutes.

Updates:
The committee continues to refine science delivery tools and resources, and welcomes user feedback. Working groups continue efforts on incorporation of uncertainty into critical loads, and the development of critical levels of ozone. CLAD is currently taking nominations for the role of secretary and will vote on nominees at the Spring 2025 meeting. Ideas for agenda items for the upcoming spring meeting are also welcome. Reach out to Kris Novak (novak.kristopher@epa.gov) or Jeremy Ash (Jeremy.ash@usda.gov) with ideas.

Updates:
The committee is advancing key initiatives, including reviewing U.S. integrated mercury monitoring capabilities and developing a passive mercury network. Federal agencies are coordinating to compile and synthesize mercury monitoring information, towards creating a nationally integrated dataset. This will help assess the link between mercury deposition and environmental concentrations, which is fundamental for evaluating the effectiveness of the Minamata Convention. Identifying gaps and overlaps in monitoring coverage will also inform future network development.
Passive Mercury Pilot Network: On January 1, 2025, NADP launched a passive mercury network pilot to complement its other mercury networks (AMNet, MDN, and MLN). This new network measures quarterly average Gaseous Elemental Mercury (GEM) concentrations using a passive sampler (Tekran MerPAS) deployed at nine U.S. locations. It offers a cost-effective method for potentially estimating dry deposition, addresses global data needs in support of the Convention, and advances NADP’s mission. Visit https://nadp.slh.wisc.edu/hg-passive-pilot-network/ for more information.
NOAA: Lastly, NOAA's Air Resources Laboratory is shutting down its mercury monitoring activities and has several Tekran 2537s, 1130 pump modules, entry boxes, and other equipment available for donation. Interested entities should contact Winston Luke (Winston.Luke@noaa.gov) for details.

Updates:
This committee develops and maintains measurement-model fusion maps which provide estimates of the deposition of a variety of pollutants across the USA (maps for 2000-2023 available at: https://www.epa.gov/castnet/total-deposition-maps). Recently, a similar approach known as ADAGIO has been developed for Canada using NADP data and simulations from the GEM-MACH regional air quality model and is described in a paper coauthored by TDep members (Robichaud et al., 2025). Research from several TDEP workgroups and committee members will be highlighted at the upcoming Spring Meeting – stay tuned for the meeting agenda! In the meantime, the TDep Monitoring Workgroup plans to release a report stemming from the workshop that they hosted last spring.

Robichaud, A., Cole, A., Cheng, I., Cathcart, H., Feng, J., & Hou, A. (2025). Data fusion of modelled and measured deposition in the U.S. and Canada, part I: Description of methodology and validation of wet deposition of sulfur and nitrogen. Atmospheric Environment, 347, 121074. https://doi.org/10.1016/j.atmosenv.2025.121074

NADP technical subcommittees: These committees advise the Executive Committee and develop initiatives, projects, and recommendations for program change.

Updates:
Spring meeting: The NOS has been preparing for the Spring 2025 meeting. An email has been sent to all NADP members containing the Block agenda and tentative NOS and Joint agendas. Please provide comments by March 17 to Winston Luke (Winston.Luke@noaa.gov) with additional agenda items or suggestions. The overarching structure of the meeting will include a 3-hour Virtual NOS session on or around April 28 (agenda forthcoming), to free up time in Madison for detailed discussions of NADP operations. An initial discussion of proposed changes to network operations will take place in the Joint I session on Monday, May 12. Following that, subcommittees, advisory committees, science committees, and ad hoc groups will discuss the ramifications of these changes for data products, research initiatives, logistics and operations, etc. Final decisions on changes to network operations will be made at the Joint II session on Thursday, May 15. NOS requests that all science committee chairs include these discussions on their meeting agendas in May, and/or convene virtual meetings prior to the Spring meeting, to ensure thorough deliberations in Madison.
Meeting Minutes: Thanks to Noel Deyette for circulating the NOS minutes from the Fall 2024 meeting in Duluth. They have been approved. Joint committee minutes were sent out for review on February 21. Please submit comments or edits by March 17 as voting is to follow.
NOS Secretary: NOS is actively seeking a new Secretary at the Spring meeting, with duties to begin at the Fall 2025 meeting. Maintaining the pipeline of NOS officers is crucial to the success of NADP. Please consider volunteering for this important position. Contact Winston Luke, Noel Deyette (ndeyette@usgs.gov), or Jason Lynch (Lynch.Jason@epa.gov) for details, questions, etc.

Updates:
Communication workshop: EOS is currently planning a communication workshop for an upcoming NADP meeting. The goal will be to invite both NADP stalwarts and new communication staff and to send communication staff home with posts and web content about NADP. EOS will have more details about this at the Spring NADP meeting.
Air Quality Awareness Week: EOS will not be creating a new web page or web content for Air Quality Awareness Week 2025. However, the content from previous NADP AQAW is still on the website if you need content for this year’s AQAW celebration (https://nadp.slh.wisc.edu/news/aqaw-2024/).

NADP Advisory Groups: These advisory groups advise the Executive Committee on quality management, quality assurance, and data management for networks and programs.

Updates:
The tabled proposal to change the sample bucket lid protocol for NTN remains an open issue and will be on the QAAG agenda for this spring. Feedback from site operators is underway to understand the impacts or potential complications with this change. The pilot study of the ALPHA samplers for AMoN is underway. Ten sites are deploying duplicates of both sampler types for comparison. The current data set will be presented at the Spring Meeting. The TN/TP study for the National Parks Service in conjunction with Colorado State University, is still in the beginning stage, but progress has been made in the NAL on validating the method. The 2023 Quality Assurance Report (QAR) is currently available on the NADP website. The 2024 QAR will begin production soon.

Updates:
DMAG has been building the SOP's for the new data review process, as well as developing a detailed testing plan to compare it to the old process. Greg Beachley and Mark Kuether have started working together on understanding the old map integration scripts in order to re-integrate the PRISM and NADP precipitation data. DMAG is also studying the old scripts to determine how population density was calculated, and to update those classifications on more up to date census data.

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