2004-09-21 Natural Aerosol Event Detection and Characterization

[object Object],[object Object],[object Object],[object Object],Natural Aerosol Event Detection and Characterization

Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Background, Objectives and and Approach to the Analysis

Background, Objectives and and Approach to the Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Aerosol Types and their Events: Dust, Smoke and Haze ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Regional Haze Rule: Nomenclature and Time Scale Schematics ,[object Object],[object Object],[object Object],[object Object],[object Object],Haze Components Natural haze is due to natural windblown dust, biomass smoke and other natural processes Man-made haze is due industrial activities AND man-perturbed smoke and dust emissions A fraction of the man-perturbed smoke and dust is assigned to natural by policy decisions Regulatory Components Goal is to attain natural conditions by 2064; Establish baseline during 2000-2004 First SIP & Natural Cond. estimate in 2008; SIP & Natural Cond. revisions every 10 yrs

Natural Aerosol Analysis Goals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Observational Tools Establishing Aerosol Origin ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Direct Evidence Spatial Pattern Wind Pattern Composition Temporal Pattern Trajectory ,[object Object],[object Object],[object Object]

Natural Aerosol Conditions – Default Values ,[object Object],[object Object],[object Object],[object Object],Mass West East Regulatory objective: Fortify the natural condition estimates by the 2008 SIP call.

Regional Haze Guide on Fire and Dust ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Direct Evidence of Natural Aerosol Events ,[object Object]

Aerosol Events Catalog ,[object Object],[object Object],[object Object],[object Object],Dust Events Haze Events Smoke Events FASTNET Aerosol Event Catalog

Example Event Catalog Entry: Texas Dust Event

Aerosol Event Catalog: Astronaut Photos ,[object Object],[object Object],[object Object]

Aerosol Event Catalog: Web pages ,[object Object],[object Object]

Temporal Pattern Regional Speciated Analysis - VIEWS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Regions of Aggregation

Dust ,[object Object],[object Object],[object Object],[object Object],US West East

Dust ,[object Object],Northeast Southwest Southeast

Dust ,[object Object],Northwest S. California Great Plaines

Amm. Sulfate ,[object Object],US West East

Amm. Sulfate ,[object Object],Northeast Southwest Southeast

Amm. Sulfate ,[object Object],Northwest S. California Great Plaines

Organic Carbon ,[object Object],US West East

Organic Carbon ,[object Object],Northeast Southwest Southeast

Organic Carbon ,[object Object],Northwest S. California Great Plaines

Reconstructed Fine Mass ,[object Object],US West East

Reconstructed Fine Mass ,[object Object],Northeast Southwest Southeast

Reconstructed Fine Mass ,[object Object],Northwest S. California Great Plaines

Event Definition: Time Series Approach ,[object Object]

Sulfate EUS Daily Average 50%-ile, 30 day 50%-ile smoothing Deviation from %-ile Event – Deviation > percentile value Median Seasonal Conc. Mean Seasonal Conc.

Eastern US PM25 Event Composition ,[object Object],[object Object],[object Object]

Origin of Fine Dust Events over the US Gobi dust in spring Sahara in summer Fine dust events over the US are mainly from intercontinental transport Fine Dust Events, 1992-2003 ug/m3

Daily Average Concentration over the US ,[object Object],[object Object],Sulfate is seasonal with noise Noise is by synoptic weather VIEWS Aerosol Chemistry Database

Dust Event Detection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Seasonal Pattern of Dust Baseline and Events ,[object Object],[object Object],[object Object]

Fine Dust Concentration Pattern

Annual Average Fine Dust Pattern (Derived from VIEWS 1992-2002)

Seasonal Average Fine Soil (VIEWS database, 1992-2002) ,[object Object],[object Object],[object Object]

Annual Average Fine Dust Concentration (VIEWS database, 1992-2002) ,[object Object],[object Object]

TOMS and VIEWS, July ,[object Object],[object Object]

Local Dust ,[object Object],[object Object]

FAST-CATT: EUS Dust Transport Events ,[object Object]

Example high fine dust days ( See console for complete list ) Asian Dust April 16, 2001 Sahara Dust July 5, 2001 Southwestern Dust Oct. 16, 2001

AIRNOW PM25 Northeast, Southeast Northeast Southeast 2004 2004 2003 2003

AIRNOW PM25 Great Lakes, Great Plaines Great Lakes Great Plaines 2004 2004 2003 2003

AIRNOW PM25 Northwest, Southwest Northwest Southwest 2004 2004 2003 2003

AIRNOW PM25 Northeast, Southeast Northeast Southeast 2004 2004

AIRNOW PM25 Great Lakes, Great Plaines Great Lakes Great Plaines 2004 2004

AIRNOW PM25 Northwest, Southwest Northwest Southwest 2004 2004

2004-09-21 Natural Aerosol Event Detection and Characterization

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2004-09-21 Natural Aerosol Event Detection and Characterization