NADP Passive Ammonia Monitoring Network ( AMoN )
description
Transcript of NADP Passive Ammonia Monitoring Network ( AMoN )
NADP Passive Ammonia Monitoring Network (AMoN)
Melissa Puchalski, US EPA, CAMDMark Rhodes, NADP Program Office
Chris Lehmann, NADP Central Analytical LaboratoryDonna Schwede, US EPA, ORD
Jesse Bash, US EPA, ORDNADP Spring 2012
Portland, OR
Network Status
• 53 Active Sites • 3 New sites:– Georgia Station, GA41– Logan, UT01– Salt Lake City, UT97
• No sites were shutdown since last update
Data Availability
• 35 AMoN sites collocated with CASTNET• 145 site-years available• Site photos available on the AMoN website• Bi-weekly replicate samples or triplicate
average concentrations– Triplicates at 5% of the sites– Travel blanks to all sites
Independent QA• Independent audit SOW
now includes identifying any violations to the siting criteria at AMoN (and AMNet) sites that are collocated with CASTNET, NTN, MDN or AIRMoN
• Contractor will also take photographs of the site and submit to the PO
Ammonia Concentrations
Data Quality Assurance
Elevated Travel Blanks – Mark RhodesVariability in Triplicates – Chris Lehmann
Estimated Deposition Fluxes
• Using AMoN seasonal concentrations + 2002 CMAQ deposition velocities
2006 2007 2008 2009 2010 2011 20120
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8Annual Ammonia Concentrations (Ohio)
OH02OH27OH54
Amm
onia
Con
cent
ratio
n (u
g/m
3)
2006 2007 2008 2009 2010 2011 20120
1
2
3
4
5
6
7
8
9
Annual Ammonia Flux (Ohio)
OH02OH27OH54
Amm
onia
Flu
x kg
/ha-
yr
Contribution of NH3 to “total” N deposition
• Caveats!!!– Average annual NH3 dry deposition calculated
from:• 2011 bi-weekly concentrations (AMoN) • 2002 weekly CMAQ vd’s
– CASTNET/NTN wet and dry deposition estimated from 2009 total deposition (annual)
NO3_WET_N12%
NH4_WET_N13% HNO3
_DRY_N
7%NO3_DRY_
N1%
NH4_DRY_
N3%
NH3_DRY_N65%
SND152/AL99
NO3_WET_N29%
NH4_WET_N23%
HNO3_DRY_N11%
NO3_DRY_N1%
NH4_DRY_N3%
NH3_DRY_N34%
ABT147/CT15
NO3_WET_N20%
NH4_WET_N37%
HNO3_DRY_N8%
NO3_DRY_N1%
NH4_DRY_N2%
NH3_DRY_N31%
KNZ184/KS31
NH3 dry
NH4 dry
NO3 dry
HNO3 dry
NH4 wet
NO3 wet
Bi-directional flux
• 2002 annual simulation with bi-directional science option in progress
• 2006 annual simulation will be next• Work with ORD to understand how we can use
bi-weekly NH3 (and hourly Hg) concentrations with the bi-directional deposition velocities to estimate flux at AMoN/AMNet sites
Special Studies
ACCS UpdateNOx/SOx Secondary Standard Field Pilot Program
Ammonia CASTNET CSN Study (ACCS)
• Two journal articles – NH3 comparison between AMoN, URG denuders,
MPPDs in Super SASS– Ion comparison between CASTNET filter pack, URG
denuders, Super SASS canisters (CSN)• Final data being QA’ed• Schedule – mid-summer, early fall submittal
NOx/SOx Secondary Standard Field Pilot Program Implementation
• Final Rule announced on March 20th - no new standard set• Proposal to implement a Field Pilot Program (FPP) to enhance understanding of the level of
protectiveness we could expect from a multi-pollutant standard• 3-5 eco-regions to be selected• 5 year program to address uncertainty in developing a standard based on eco-region specific AAI
values• Standard measurements at proposed FPP sites include:
– CASTNET filter pack (SO2, SO4) – direct input to the AAI– Continuous NOy – direct input to the AAI as total reactive N
• Additional measurements may be added to some sites to complement these basic measurements– NTN – AMoN– PM2.5 speciation– Total NO3 from the CASTNET filterpack– Continuous SO2
– True NO2
AMoN
ACCS Study – ARE128/PA00
FL11WY94
TN01
IL46
CA83
WY94
OH54
CA67
OH02
AZ98CO88
OK99
ID03
NC26FL11
GA41
SC05
WY94
WA99
Local source of ammonia reported
Local source of ammonia reported
NC25