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Using CATS Near-Real-time Lidar Observations to Monitor and Constrain Volcanic Sulfur Dioxide (SO2) ForecastsAn eruption of Italian volcano Mount Etna on 3 December 2015 produced fast-moving sulfur dioxide (SO2) and sulfate aerosol clouds that traveled across Asia and the Pacific Ocean, reaching North America in just 5 days. The Ozone Profiler and Mapping Suite's Nadir Mapping UV spectrometer aboard the U.S. National Polar-orbiting Partnership satellite observed the horizontal transport of the SO2 cloud. Vertical profiles of the colocated volcanic sulfate aerosols were observed between 11.5 and 13.5 km by the new Cloud Aerosol Transport System (CATS) space-based lidar aboard the International Space Station. Backward trajectory analysis estimates the SO2 cloud altitude at 7-12 km. Eulerian model simulations of the SO2 cloud constrained by CATS measurements produced more accurate dispersion patterns compared to those initialized with the back trajectory height estimate. The near-real-time data processing capabilities of CATS are unique, and this work demonstrates the use of these observations to monitor and model volcanic clouds.
Document ID
20170002490
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hughes, E. J. (Maryland Univ. College Park, MD, United States)
Yorks, J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Krotkov, N. A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
da Silva, A. M. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Mcgill, M. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
March 23, 2017
Publication Date
October 30, 2016
Publication Information
Publication: Geophysical Research Letters
Volume: 43
Issue: 20
ISSN: 0094-8276
Subject Category
Meteorology and Climatology
Report/Patent Number
GSFC-E-DAA-TN41915
GSFC-E-DAA-TN40308
Distribution Limits
Public
Copyright
Other
Keywords
space
lidar
remote sensing
clouds
aerosols