ARL Contributions to the WMO Atmospheric Deposition Program

ARL Contributions to the WMO Atmospheric Deposition Program

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, 2016 2 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, 2016 3 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, 2016 4

2004 Manual for the GAW Precipitation Chemistry Programme 1. 2. 3. 4. 5. 6. 7. 8. 9. Introduction

Siting Field Protocols Laboratory Operations Data Management Quality Control and Quality Assurance Establishment of Data Quality Objectives Guidelines for Data Submission Algorithm for Sea Salt Corrections 2nd edition to be published later this year ARL Science Review, June 21-23, 2016 5

ARL Science Review, June 21-23, 2016 6 Measurement Station Analytical Laboratory Laboratory Information Lab Website link List of stations served by the lab Link to Ring Diagrams for lab ARL Science Review, June 21-23, 2016

7 Quality 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 Published August, 2014 Google Scholar Reports 52 Citations as of April, 2016 Open Access: http://www.sciencedirect.com/science/journal/13522310/93/supp/C ARL Science Review, June 21-23, 2016 8 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, NH4 NO3, PO4, SO4, Cl ARL Science Review, June 21-23, 2016 9 Global Assessment Approach 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 ARL Science Review, June 21-23, 2016 10 Products Data Sets: quality-assured global data set of measurements from regionallyrepresentative sites around the world downloadable from the World Data Centre for Precipitation Chemistry (http://wdcpc.org/)

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, 2016 11 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, 2016 12 U.S and Canada: Wet+Dry Deposition of N (NO2 and NH3 not included in measured dry and total deposition) ARL Science Review, June 21-23, 2016 13

Organic Acids Formic (top) and Acetic (bottom) ARL Science Review, June 21-23, 2016 Concentration (eq L-1) 14 Wet Deposition of Dissolved Inorganic P 15 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, 2016

16 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, 2016 17 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, 2016 18 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, 2016 19

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, 2016 20 Next Steps Update the guidance document Provide guidance for measurement of total and orthophosphate, 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, 2016 21 Performance: Collaborations ARL Science Review, June 21-23, 2016 22

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