Presentation is loading. Please wait.

Presentation is loading. Please wait.

Trends in the Wet and Dry Deposition of Nitrogen and Sulfur Species

Published byOswin Wood Modified over 8 years ago

Similar presentations

Presentation on theme: "Trends in the Wet and Dry Deposition of Nitrogen and Sulfur Species"— Presentation transcript:

1 Trends in the Wet and Dry Deposition of Nitrogen and Sulfur Species
Christopher Lehmann

2 Atmospheric Deposition
REMOVAL ATMOSPHERIC TRANSPORT & TRANSFORMATION REACTIONS DRY DEPOSITION AEROSOL PARTICLES & GASES Deposition velocity Precipitation volume/time WET DEPOSITION PRECIPITATION EMISSIONS ADVERSE ENVIRONMENTAL EFFECTS

3 Atmospheric Emissions
1990 Clean Air Act Amendments 9.1 Tg reduction ( ) 2010 8.1 Tg Source: U.S. EPA

4 Atmospheric Emissions
1990 Clean Air Act Amendments power plant and mobile source emissions reduced Source: U.S. EPA

5 Atmospheric Emissions
Ammonia Increases? …or not? Source: U.S. EPA

6 National Trends Network (NTN)
Source: NADP

7 Sulfate Ion Concentrations
1985 1986 1984 Source: NADP

8 Sulfate Ion Concentrations
2004 2005 2003 Source: NADP

9 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend
Sulfate Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 5 154 141 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend

10 Emissions Concentration
Sulfate Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 5 154 141 Trends Emissions Concentration -45% %

11 Nitrate Ion Concentrations
1985 1986 1984 Source: NADP

12 Nitrate Ion Concentrations
2004 2005 2003 Source: NADP

13 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend
Nitrate Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 71 36 88 45 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend

14 Emissions Concentration
Nitrate Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 71 36 88 45 Trends Emissions Concentration -17% -3%

15 Ammonium Ion Concentrations
1985 1986 1984 Source: NADP

16 Ammonium Ion Concentrations
2004 2005 2003 Source: NADP

17 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend
Ammonium Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 142 101 17 3 Seasonal Kendall Trend Test, α = 90% Sen’s Median Estimator of Trend

18 Emissions Concentration
Ammonium Trend in Precipitation INCREASING Trend DECREASING Number of Sites Number Significant 142 101 17 3 Trends Emissions Concentration +24% %

19 Atmospheric Deposition
REMOVAL ATMOSPHERIC TRANSPORT & TRANSFORMATION REACTIONS DRY DEPOSITION AEROSOL PARTICLES & GASES Deposition velocity Precipitation volume/time WET DEPOSITION PRECIPITATION EMISSIONS ADVERSE ENVIRONMENTAL EFFECTS

20 Clean Air Status & Trends Network (CASTNET)
Weekly 3-stage filter pack samples Teflon filter: particulate sulfate and nitrate Nylon filter: nitric acid, sulfur dioxide Impregnated cellulose: sulfur dioxide CASTNET Filter Pack Images provided by Clean Air Status and Trends Network (U.S. EPA)

21 CASTNET Source:

22 Great Basin National Park
NTN NV05 Great Basin National Park CASTNET CTH110 Connecticut Hill, NY

23 Precipitation Sulfate
 Concentrations, (NADP) Particulate Sulfate Concentrations,  (CASTNET)

24 Particulate Sulfate Concentration Trend Precipitation Sulfate
CASTNET NADP/NTN

25 Precipitation Nitrate
 Concentrations, (NADP) Particulate Nitrate Concentrations,  (CASTNET) ???

26 Precipitation Ammonium
??? Precipitation Ammonium  Concentrations, (NADP) Particulate Ammonium Concentrations,  (CASTNET) ???

27 Precipitation Ammonium
Particulate Ammonium Concentration Trend Precipitation Ammonium Concentration Trend CASTNET NADP/NTN

28 CMU-model Ammonia-N Emissions
2002 (includes soil emissions)

29 ??? ??? Ammonia Emissions vs. Ammonium Trends
Emissions Differences ??? Ammonia Emissions vs. Ammonium Trends ??? 1985 – 2004 Ammonium Trend Why do trends in ammonia emissions and ammonium deposition differ?

30 Sulfate, Ammonium & Nitrate Reactions
Transport Distance Ammonium Sulfate NH4+ + NH4+ + HSO4- ⇌ NH4+ SO4= Seinfeld and Pandis, 1998

31 Sulfate, Ammonium & Nitrate Reactions
Transport Distance Ammonium Sulfate NH4+ + NH4+ + HSO4- ⇌ NH4+ SO4= Ammonium Nitrate NH3,g + HNO3,g ⇌ NH4 NO3 Seinfeld and Pandis, 1998

32 Sulfate, Ammonium & Nitrate Reactions
Transport Distance Ammonium Sulfate NH4+ + NH4+ + HSO4- ⇌ NH4+ SO4= Ammonium Nitrate NH3,g + HNO3,g ⇌ NH4 NO3 Ammonia Gas NH3,g Seinfeld and Pandis, 1998

33 Ammonium vs. Sulfate Trends Bondville, IL
Particulate Concentrations Precipitation Concentrations

34 Ammonia vs. Ammonium Concentrations Bondville, IL
LOESS of Raw Data 180-day window

35 Ammonia Gas vs. Precipitation Ammonium Bondville, IL

36 Conclusion There is a need for a network of ammonia gas monitoring sites in the U.S. (nitric acid too….) Compare with precipitation ammonium measurements from the NADP/NTN, particulate ammonium from CASTNET Validate ammonia emissions inventories Improves evaluation of nitrogen dry deposition with measurements not currently included in existing networks.

37 How to Monitor Ammonia Gas
Source:

38 Source: Minutes, NADP Joint Subcommittee, Fall 2005 (attachments)

39

40 Acknowledgements S. Larson, V. Bowersox, T. Bond, D. Wuebbles
Colleagues at: National Atmospheric Deposition Program Illinois State Water Survey The NADP receives support from the U.S. Geological Survey; Environmental Protection Agency; National Park Service; National Oceanic and Atmospheric Administration; U.S. Department of Agriculture-Forest Service; U.S. Fish & Wildlife Service; Bureau of Land Management; Tennessee Valley Authority; and U.S. Department of Agriculture - Cooperative State Research, Education, and Extension Service via cooperative agreement. Additional support is provided by other federal, state, local, and tribal agencies, State Agricultural Experiment Stations, universities, and nongovernmental organizations. Any findings or conclusions in this presentatoin do not reflect the views of the U.S. Department of Agriculture or other NADP sponsors.

Download ppt "Trends in the Wet and Dry Deposition of Nitrogen and Sulfur Species"

Similar presentations

Nitrogen Deposition at Rocky Mountain National Park: the RoMANS Study Mike Barna Bill Malm Bret Schichtel Kristi Gebhart Air Resources Division National.

Nitrogen Deposition at Rocky Mountain National Park: the RoMANS Study Mike Barna Bill Malm Bret Schichtel Kristi Gebhart Air Resources Division National.
Contaminated Fish: The Mercury Connection. Natural Sources: Occurs naturally in soils, sediments, and rocks Volcanic eruptions Wildfires Man-Made Sources:

Contaminated Fish: The Mercury Connection. Natural Sources: Occurs naturally in soils, sediments, and rocks Volcanic eruptions Wildfires Man-Made Sources:
Air Pollution and Stratospheric Ozone Depletion

Air Pollution and Stratospheric Ozone Depletion
1 Policies for Addressing PM2.5 Precursor Emissions Rich Damberg EPA Office of Air Quality Planning and Standards June 20, 2007.

1 Policies for Addressing PM2.5 Precursor Emissions Rich Damberg EPA Office of Air Quality Planning and Standards June 20, 2007.
An Investigation of Ammonia and Inorganic Particulate Matter in California during the CalNex Campaign AGU Fall Meeting 5 December 2012 Luke D. Schiferl,

An Investigation of Ammonia and Inorganic Particulate Matter in California during the CalNex Campaign AGU Fall Meeting 5 December 2012 Luke D. Schiferl,
ROMANS Nitrogen Source Sensitivity Analysis Mike Barna 1 Marco Rodriguez 2 Kristi Gebhart 1 Bill Malm 1 Bret Schichtel 1 Jenny Hand 2 1 ARD-NPS, Fort Collins,

ROMANS Nitrogen Source Sensitivity Analysis Mike Barna 1 Marco Rodriguez 2 Kristi Gebhart 1 Bill Malm 1 Bret Schichtel 1 Jenny Hand 2 1 ARD-NPS, Fort Collins,
Modification of Network Sampling Systems for Measurement of NH 3 Derek Day, Misha Schurman, Katie Beam, Jeff Collett, William Malm MOTIVATION Ammonia (NH.

Modification of Network Sampling Systems for Measurement of NH 3 Derek Day, Misha Schurman, Katie Beam, Jeff Collett, William Malm MOTIVATION Ammonia (NH.
Photochemical Model Performance for PM2.5 Sulfate, Nitrate, Ammonium, and pre-cursor species SO2, HNO3, and NH3 at Background Monitor Locations in the.

Photochemical Model Performance for PM2.5 Sulfate, Nitrate, Ammonium, and pre-cursor species SO2, HNO3, and NH3 at Background Monitor Locations in the.
Modeled Ammonia Nitrogen Deposition Source Apportionment at Rocky Mountain National Park for RoMANS2 Mike Barna 1 Marco Rodriguez 2 Kristi Gebhart 1 Bret.

Modeled Ammonia Nitrogen Deposition Source Apportionment at Rocky Mountain National Park for RoMANS2 Mike Barna 1 Marco Rodriguez 2 Kristi Gebhart 1 Bret.
Perspectives in Designing and Operating a Regional Ammonia Monitoring Network Gary Lear USEPA Clean Air Markets Division.

Perspectives in Designing and Operating a Regional Ammonia Monitoring Network Gary Lear USEPA Clean Air Markets Division.
What Goes Up Does Come Down How Air Pollution Affects our Natural Resources Christopher Lehmann Director, Central Analytical Laboratory National Atmospheric.

What Goes Up Does Come Down How Air Pollution Affects our Natural Resources Christopher Lehmann Director, Central Analytical Laboratory National Atmospheric.
The Visibility Information Exchange Web System is a database system and set of online tools originally designed to support the Regional Haze Rule enacted.

The Visibility Information Exchange Web System is a database system and set of online tools originally designed to support the Regional Haze Rule enacted.
Future Inorganic Aerosol Levels 4th GEOS-Chem Users’ Meeting 9 April 2009 Havala Pye* 1, Hong Liao 2, Shiliang Wu 3,5, Loretta Mickley 3, Daniel Jacob.

Future Inorganic Aerosol Levels 4th GEOS-Chem Users’ Meeting 9 April 2009 Havala Pye* 1, Hong Liao 2, Shiliang Wu 3,5, Loretta Mickley 3, Daniel Jacob.
BRAVO - Results Big Bend Regional Aerosol & Visibility Observational Study Bret Schichtel National Park Service,

BRAVO - Results Big Bend Regional Aerosol & Visibility Observational Study Bret Schichtel National Park Service,
Map of the Guadalupe Mountains Region NEW MEXICO TEXAS Guadalupe Mtns. Park Map To Carlsbad To El Paso To I-10 Visibility Degradation in Guadalupe Mountains.

Map of the Guadalupe Mountains Region NEW MEXICO TEXAS Guadalupe Mtns. Park Map To Carlsbad To El Paso To I-10 Visibility Degradation in Guadalupe Mountains.
The Visibility Information Exchange Web System (VIEWS): An Approach to Air Quality Data Management and Presentation In a broader sense, VIEWS facilitates.

The Visibility Information Exchange Web System (VIEWS): An Approach to Air Quality Data Management and Presentation In a broader sense, VIEWS facilitates.
From Ammonia to PM 2.5 Brent Auvermann Texas Cooperative Extension Texas Agricultural Experiment Station Amarillo, TX.

From Ammonia to PM 2.5 Brent Auvermann Texas Cooperative Extension Texas Agricultural Experiment Station Amarillo, TX.
ACID RAIN : CAUSES AND EFFECTS. WHAT IS ACID RAIN SO 2, No x TRACES OF NH 4, Cl LOW pH.

ACID RAIN : CAUSES AND EFFECTS. WHAT IS ACID RAIN SO 2, No x TRACES OF NH 4, Cl LOW pH.
Monitoring Chemical Climate Change in America The Case for Ammonia V. Bowersox, C. Lehmann, B. Larson Acknowledge – R. Claybrooke NADP Program Office.

Monitoring Chemical Climate Change in America The Case for Ammonia V. Bowersox, C. Lehmann, B. Larson Acknowledge – R. Claybrooke NADP Program Office.
NADP Data Use State of Wisconsin. Spooner (WI37) Perkistown (WI35) Trout Lake (WI36) Popple River (WI09) Potawatomi (WI10) Suring (WI25) Lake Dubay (WI28)

NADP Data Use State of Wisconsin. Spooner (WI37) Perkistown (WI35) Trout Lake (WI36) Popple River (WI09) Potawatomi (WI10) Suring (WI25) Lake Dubay (WI28)

Similar presentations

Ads by Google