Title: NARSTO PM Assessment Chapter 5: Spatial and Temporal Pattern TOC Introduction Data Global Pattern NA
1NARSTO PM AssessmentChapter 5 Spatial and
Temporal PatternTOC Introduction Data Global
Pattern NAM Dust NAM Smoke NAM Haze NAM Total
PM Local PM Speciated Seasonal Fine Mass over
the Eastern US
- The seasonal aerosol aerosol pattern at the
IMPROVE sites is examined using two
methodologies - Seasonal Mass Balance Charts
-
2Method 1 Cumulative Seasonal PM2.5 Composition
- PM2.5 chemical components were calculated based
on the CIRA methodology - In addition, the the organics were (tentatively)
further separated as Primary Smoke Organics (red)
and Remainder organics (purple) - PSO 20(K - 0.15Si 0.02 Na)
- Remainder Org Organics - PSO
- Also, the Unknown mass (white area) is the
difference between the gravimetrically measured
and the chemically reconstructed PM2.5. - The daily chemical composition was aggregated
over the available IMPROVE data range (1988-99)
to retain the seasonal structure. - I order to reduce the noise the daily data were
smoothed by a 15-day moving average filter.
Shenandoah
3Regional Grouping of Sites
- For this presentation the IMPROVE sites were
grouped as follows - New England ()
- Mid-Atlantic ()
- Central EUS ()
- Peripheral ()
- For each region, the seasonality is displayed
for - Chemical Mass Balance
- Carbonaceous Mass Balance
- Fine Particle Mass Percentiles
- Coarse Mass Percentiles
- Sulfate Percentiles
- Fine Soil Percentiles
- Tot. Carbon. 'Unknown' Percentiles
- Smoke Organics Percentiles
4New England Chemical Mass Balance
Moosehorn
Acadia
Lye Brook
5Mid-Atlantic Chemical Mass Balance
Washington DC
Brigantine
Shenandoah
Dolly Sods
Jefferson
6Central EUS Chemical Mass Balance
Upper Buffalo
Mammoth Cave
Shining Rock
G.Smoky Mtn.
Sipsy
7Peripheral Sites Chemical Mass Balance
- Eastern N. America is surrounded by aerosol
source regions such as Sahara and Central
America. - As a consequence, the PM concentration at the
edges ranges between 4-15 ug/m3 much of it
originating outside. - The chemical composition of the inflow varies by
location and season. - Sahara dust, and smoke from Central America and
W. US/Canada are the main contributions.
Voyageurs (scale 0-15 ug/m3)
Acadia
Badlands (scale 0-15 ug/m3)
Big Bend (scale 0-15 ug/m3)
Everglades