ARL Contributions to the WMO Atmospheric Deposition Program Richard S. Artz NOAA Air Resources Laboratory June 22, 2016.

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Presentation transcript:

ARL Contributions to the WMO Atmospheric Deposition Program Richard S. Artz NOAA Air Resources Laboratory June 22, 2016

Goals  Provide Support to International Atmospheric Deposition Programs  World Meteorological Organization Global Atmosphere Watch Science Advisory Group  1998 – 2015: Precipitation Chemistry  2015 – Present: Total Atmospheric Deposition ARL Science Review, June 21-23,

Performance  Chair the WMO Science Advisory Group on Precipitation Chemistry  Assemble a group of top deposition scientists from major national or regional deposition programs  US National Atmospheric Deposition Program  Canadian Air and Precipitation Monitoring Network  European Monitoring and Evaluation Program  East Asia Network  Deposition of Biogeochemically Important Trace Species, a part of the International Global Atmospheric Chemistry program  High quality unaffiliated stations in Russia, India, Oceania, and elsewhere  Develop comprehensive programs  Guidance  Quality Assurance  Assessments ARL Science Review, June 21-23,

Relevance Atmospheric deposition estimates are used by scientists for several key purposes: Critical Loads calculations Air quality modeling Marine applications Applications to terrestrial ecosystems ARL Science Review, June 21-23,

2004 Manual for the GAW Precipitation Chemistry Programme ARL Science Review, June 21-23, Introduction 2.Siting 3.Field Protocols 4.Laboratory Operations 5.Data Management 6.Quality Control and Quality Assurance 7.Establishment of Data Quality Objectives 8.Guidelines for Data Submission 9.Algorithm for Sea Salt Corrections 2 nd edition to be published later this year

ARL Science Review, June 21-23,

7 Laboratory Information  Lab Website link  List of stations served by the lab  Link to Ring Diagrams for lab Measurement Station Analytical Laboratory

ARL Science Review, June 21-23, A Global Assessment of Precipitation Chemistry and Deposition of Sulfur, Nitrogen, Sea Salt, Base Cations, Organic Acids, Acidity and pH, and Phosphorus R. Vet, R. Artz, S. Carou, M. Shaw, C.-U. Ro, W. Aas, A. Baker, V. Bowersox, F. Dentener, C. Galy-Lacaux, A. Hou, J. Pienaar, R. Gillett, M. C. Forti, S. Gromov, H. Hara, T. Khodzher, N. Mahowald, S. Nickovic, P. Rao, N. Reid Open Access: Published August, 2014 Google Scholar Reports 52 Citations as of April, 2016 Quality

ARL Science Review, June 21-23, Global Assessment - Background Key Science Questions on Global and Regional Scales:  What are the spatial patterns of major ions* in precipitation and wet, dry and wet+dry deposition on global and regional scales?  What changes occurred in wet deposition from 2000 to 2007 (and, where data are available, since 1990)?  What are the major gaps, uncertainties and recommendations in global deposition monitoring? * H, Ca, Mg, K, Na, NH 4 NO 3, PO 4, SO 4, Cl

ARL Science Review, June 21-23, Temporal Period: 2000 to 2007 Spatial Scales: Global and Regional Method: Combination of measurement and modelling results – All major ions found in precipitation – 470 Measurement sites – 28 Global Models Global Assessment – Approach

ARL Science Review, June 21-23, Products  Data Sets: quality-assured global data set of measurements from regionally- representative sites around the world  downloadable from the World Data Centre for Precipitation Chemistry (  accessed/used by several scientific communities  Global maps:  Measurement-based, model-based, combined measurement-model  Available in the manuscript and the Addendum (Supplementary Material)

ARL Science Review, June 21-23, Nitrogen  Wet deposition of Oxidized + Reduced Nitrogen  Model versus Measurement Results  High deposition in eastern North America, Europe and Asia  Reasonable model-measurement comparability except in Europe and parts of Asia

ARL Science Review, June 21-23, U.S and Canada: Wet+Dry Deposition of N (NO 2 and NH 3 not included in measured dry and total deposition)

ARL Science Review, June 21-23, Organic Acids Concentration (µeq L -1 )Formic (top) and Acetic (bottom)

15 Wet Deposition of Total P Wet Deposition of Dissolved Inorganic P

ARL Science Review, June 21-23, Key Scientific and Technical Challenges  Dry deposition is poorly monitored and inconsistently estimated worldwide.  Inferential dry deposition models need to be applied in other areas of the world where regionally-representative air concentration data are available.  Scientific direction is required to understand chemical cycling and to estimate wet and dry deposition of some important chemical species:  Phosphorus  Organic forms of nitrogen  Organic acids  Measurements, models and remote sensing results need to be combined (measurement/model fusion) to establish best spatial distributions of pollutants and deposition.  Large areas of the world are not monitored.

ARL Science Review, June 21-23, Key Scientific and Technical Challenges  Dry deposition is poorly monitored and inconsistently estimated worldwide.  Inferential dry deposition models need to be applied in other areas of the world where regionally-representative air concentration data are available.  Scientific direction is required to understand chemical cycling and to estimate wet and dry deposition of some important chemical species:  Phosphorus  Organic forms of nitrogen  Organic acids  Measurements, models and remote sensing results need to be combined (measurement/model fusion) to establish best spatial distributions of pollutants and deposition.  Large areas of the world are not monitored.

ARL Science Review, June 21-23, Key Scientific and Technical Challenges  Dry deposition is poorly monitored and inconsistently estimated worldwide.  Inferential dry deposition models need to be applied in other areas of the world where regionally-representative air concentration data are available.  Scientific direction is required to understand chemical cycling and to estimate wet and dry deposition of some important chemical species:  Phosphorus  Organic forms of nitrogen  Organic acids  Measurements, models and remote sensing results need to be combined (measurement/model fusion) to establish best spatial distributions of pollutants and deposition.  Large areas of the world are not monitored.

ARL Science Review, June 21-23, Key Scientific and Technical Challenges  Dry deposition is poorly monitored and inconsistently estimated worldwide.  Inferential dry deposition models need to be applied in other areas of the world where regionally-representative air concentration data are available.  Scientific direction is required to understand chemical cycling and to estimate wet and dry deposition of some important chemical species:  Phosphorus  Organic forms of nitrogen  Organic acids  Measurements, models and remote sensing results need to be combined (measurement/model fusion) to establish best spatial distributions of pollutants and deposition.  Large areas of the world are not monitored.

ARL Science Review, June 21-23, Key Scientific and Technical Challenges  Dry deposition is poorly monitored and inconsistently estimated worldwide.  Inferential dry deposition models need to be applied in other areas of the world where regionally-representative air concentration data are available.  Scientific direction is required to understand chemical cycling and to estimate wet and dry deposition of some important chemical species:  Phosphorus  Organic forms of nitrogen  Organic acids  Measurements, models and remote sensing results need to be combined (measurement/model fusion) to establish best spatial distributions of pollutants and deposition.  Large areas of the world are not monitored.

Next Steps  Update the guidance document  Provide guidance for measurement of total and ortho- phosphate, organic acids, organic N  Continue with the lab intercomparision program  Conduct global measurement-model fusion workshop in March, 2017 based in part on NADP techniques  Improve models  Benchmark with data  Estimate deposition in regions with no data  Develop outreach programs to relevant communities ARL Science Review, June 21-23,

ARL Science Review, June 21-23, Performance: Collaborations