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The Perfect Dust Storm From Gobi to the Atlantic and on to …
An evolving presentation by a virtual community. Would you like add to this presentation?
Dustfall on Snow at Zhenbeitai, China. This picture was taken near the ACE-Asia sampling station on the afternoon of 9 April 2001, the day following the big dust storm.
• Transmissometer measures the total light extinction, Bext, while the nephelometer records the light scattering, Bsp, integrated over all angles except near the direction of the light.
• Nephelometers underestimate coarse particle scattering by as much as 50% due to truncation of the forward scattering lobe.
• The large difference between the Bext and Bsp along with the low RH at Yosemite and the Grand Canyon Nat. Parks is a good indication that the Asian dust was present during April 14-17.
Lidar Depolarization by Dust.Salt Lake City, April 15
K. Sassen, [email protected]• Preliminary (hurried) lidar images of the 15 April dust layer over Salt Lake City. • The linear depolarization ratios in the surface to 4.5 km MSL dust layer were ~20%,
sometimes ~25%, and up to ~15% aloft. This is quite high for our region.