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MODIS Rapid Response FASTNET Event Report: 040219TexMexDust Texas-Mexico Dust Event February 19, 2004 Contributed by the FASNET Community Correspondence to R Poirot , R Husar

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FASTNET Event Report: 040219TexMexDust. Texas-Mexico Dust Event February 19, 2004. Contributed by the FASNET Community Correspondence to R Poirot , R Husar. MODIS Rapid Response. The MODIS sensor on AQUA and Terra provides 250m resolution image s of the dust storm - PowerPoint PPT Presentation

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Page 1: MODIS Rapid Response

MODIS Rapid Response

FASTNET Event Report: 040219TexMexDust

Texas-Mexico Dust EventFebruary 19, 2004

Contributed by the FASNET CommunityCorrespondence to R Poirot, R Husar

Page 2: MODIS Rapid Response

Satellites detect dust most storms in near real time The MODIS sensor on AQUA and Terra provides

250m resolution images of the dust stormVisual inspection reveals the dust sources at the beginning of dust streaks.

The NOAA AVHRR sensor highlights the dust by its IR sensorsIn the TOMS satellite image, the dust signal is conspicuously absent – too close to the ground

Page 3: MODIS Rapid Response

Media and Other Accounts

KBIM television reporter Abby Roedel films a vehicle accident during a dust storm Thursday (2/19/04) in New Mexico.

SOUTHLAND, Texas (AP) -- Thick, reddish-brown dust swirled over parts of West Texas, contributing to a series of traffic accidents that killed two people and injured dozens of others. As many as 30 vehicles crashed Thursday (2/19) on U.S. Highway 84 between Southland and Post, about 20 miles southeast of Lubbock, said Cpl. John Gonzalez with the Department of Public Safety.

Page 4: MODIS Rapid Response

PM2.5 from EPA AIRNOW & RH-adjusted bscat: 2/18-20/04

Note Separate areas of high PM concentration and

haze in both Northeast and

Southwest Border Regions on

2/19/04.

Page 5: MODIS Rapid Response

Surface met data from the 1200 station network documents the strong winds that cause the windblown dust and resulting low-visibility regions

Page 6: MODIS Rapid Response

High Wind Speed – Dust Spatially Correspond

The spatial/temporal correspondence suggests that most visibility loss is due to locally suspended dust, rather than transported dust

Alternatively, suspended dust and ‘high winds’ travel forward at the same speedWind speed animation; Bext animation. (material for model validation?)

Page 7: MODIS Rapid Response

The passage of the dust cloud from west to east is recorded by the high-resolution ASOS_STI Dry Bext data

Page 8: MODIS Rapid Response

PM10 > 10 x PM25During the passage of the dust cloud over El Paso, the PM10 concentration was more than 10 times higher than the PM2.5

AIRNOW PM10 and Pm25 data

PM10 and PM25, El Paso, Feb. 19 2004 - AIRNOW

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Schematic

Link to dust modelers for faster collective learning?

Page 9: MODIS Rapid Response

The Mother of dust models, NAAPS, simulates the event well

Green, dust surface concentration and optical thickness

Page 10: MODIS Rapid Response

Monte Carlo simulation of dust transport using surface winds (just a toy, 3D winds are essential!)

See animation Note, how sensitive the transport direction is to the source location (according to this toy)

Page 11: MODIS Rapid Response

Bob Vet reports high concentrations of dust in deposition samples from

Chicago & southern Ontario with suspected origin from

Tex/Mex dust storm.

Michel Bisson reports “beige/orange snow” on Mt. Tremblent, Quebec and VT

has multiple reports of “brown” or “reddish-brown”

snow on 2/21/04.

Did the dust travel to the Northeast and Quebec?

Page 12: MODIS Rapid Response

WRF Research Model – No Dust Source

Do any of the HiRes models have dust sources a la NAAPS?