1 / 7

The seasonal aerosol aerosol pattern at the IMPROVE sites is examined using two methodologies: Seasonal Mass Balance Ch

NARSTO PM Assessment Chapter 5: Spatial and Temporal Pattern TOC Introduction Data Global Pattern NAM Dust NAM Smoke NAM Haze NAM Total PM Local PM Speciated Seasonal Fine Mass over the Eastern US.

satchel
Download Presentation

The seasonal aerosol aerosol pattern at the IMPROVE sites is examined using two methodologies: Seasonal Mass Balance Ch

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NARSTO PM AssessmentChapter 5: Spatial and Temporal PatternTOCIntroductionDataGlobal PatternNAM DustNAM 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

  2. Method 1: Cumulative Seasonal PM2.5 Composition Shenandoah • 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 - 0.15*Si – 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.

  3. Regional 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

  4. New England: Chemical Mass Balance Acadia Moosehorn Lye Brook

  5. Mid-Atlantic: Chemical Mass Balance Washington DC Brigantine Shenandoah Dolly Sods Jefferson

  6. Central EUS: Chemical Mass Balance UpperBuffalo Mammoth Cave Shining Rock G.Smoky Mtn. Sipsy

  7. Peripheral Sites: Chemical Mass Balance Voyageurs (scale 0-15 ug/m3) Acadia Badlands (scale 0-15 ug/m3) • 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. Big Bend (scale 0-15 ug/m3) Everglades

More Related