RT info:eu-repo/semantics/article
T1 The recovery and re-calibration of a 13-month aerosol extinction profiles dataset from searchlight observations from New Mexico, after the 1963 Agung eruption
A1 Antuña Marrero, Juan Carlos
A1 Mann, Graham W.
A1 Barnes, John
A1 Calle Montes, Abel
A1 Dhomse, Sandip S.
A1 Cachorro Revilla, Victoria Eugenia
A1 Deshler, Terry
A1 Li, Zhengyao
A1 Sharma, Nimmi
A1 Elterman, Louis
K1 Atmospheric sciences
K1 Atmósfera
K1 Aerosols
K1 Aerosoles
K1 Atmospheric aerosols - Remote sensing
K1 Aerosoles atmosféricos
K1 Atmosphere - Laser observations
K1 Optical radar
K1 Volcanic eruptions
K1 Volcanes
K1 Meteorological optics
K1 Óptica atmosférica
K1 Air - Pollution
K1 Aire - Contaminación
K1 2501 Ciencias de la Atmósfera
K1 2509.02 Contaminación Atmosférica
AB The recovery and re-calibration of a dataset of vertical aerosol extinction profiles of the 1963/64 stratospheric aerosol layer measured by a searchlight at 32°N in New Mexico, US, is reported. The recovered dataset consists of 105 aerosol extinction profiles at 550 nm that cover the period from December 1963 to December 1964. It is a unique record of the portion of the aerosol cloud from the March 1963 Agung volcanic eruption that was transported into the Northern Hemisphere subtropics. The data-recovery methodology involved re-digitizing the 105 original aerosol extinction profiles from individual Figures within a research report, followed by the re-calibration. It involves inverting the original equation used to compute the aerosol extinction profile to retrieve the corresponding normalized detector response profile. The re-calibration of the original aerosol extinction profiles used Rayleigh extinction profiles calculated from local soundings. Rayleigh and aerosol slant transmission corrections are applied using the MODTRAN code in transmission mode. Also, a best-estimate aerosol phase function was calculated from observations and applied to the entire column. The tropospheric aerosol phase function from an AERONET station in the vicinity of the searchlight location was applied between 2.76 to 11.7 km. The stratospheric phase function, applied for a 12.2 to 35.2 km altitude range, is calculated from particle-size distributions measured by a high-altitude aircraft in the vicinity of the searchlight in early 1964. The original error estimate was updated considering unaccounted errors. Both the re-calibrated aerosol extinction profiles and the re-calibrated stratospheric aerosol optical depth magnitudes showed higher magnitudes than the original aerosol extinction profiles and the original stratospheric aerosol optical depth, respectively. However, the magnitudes of the re-calibrated variables show a reasonable agreement with other contemporary observations. The re-calibrated stratospheric aerosol optical depth demonstrated its consistency with the tropics-to-pole decreasing trend, associated with the major volcanic eruption stratospheric aerosol pattern when compared to the time-coincident stratospheric aerosol optical depth lidar observations at Lexington at 42° N.
PB MDPI
SN 2073-4433
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/68161
UL https://uvadoc.uva.es/handle/10324/68161
LA eng
NO Atmosphere, 2024, Vol. 15, Nº. 6, 635
NO Producción Científica
DS UVaDOC
RD 27-dic-2024