One-year observations of Mount Pinatubo aerosol with an advanced Raman lidar over Germany at 53. 5[degree]N

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Chemical Processing (Chicago); (United States)

OSTI ID:6533925

Ansmann, A ^[1]; Wandinger, U; Weitkamp, C ^[2]

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1. Institut fuer Troposphaerenforschung, Leipzig (Germany)
2. GKSS-Forschungszentrum Geesthacht (Germany)

A combined Raman elastic-backscatter lidar is utilized to observe the development of the stratospheric perturbation after the strong eruptions of Mount Pinatubo in June 1991. Height profiles of the particle extinction and backscatter coefficients are determined simultaneously and independently of each other. From these data the area-weighted mean particle radius and the aerosol surface area and mass are determined. The lidar measurements are taken at Geesthacht in northern Germany (53.5[degree]N, 10.5[degree]E). The Pinatubo aerosol layer is located between the tropopause and about 24 km height. Traces of stratospheric aerosol were frequently found down to 5 km height. The optical depth of the stratospheric aerosol layer has been of the order of 0.15 in 1992. The ratio of optical depth to column-integrated backscatter varied between about 15 and 60 sr. Most values were found between 20 and 30 sr. Extinction-to-backscatter ratios >50, between 20 and 30, and <15sr indicate effective particle radii <0.2, between 0.2 and 0.75, and >0.75 [mu]m, respectively, as Mie scattering calculations show. Variations of the extinction-to-backscatter ratio with height between about 10 and 99 sr were observed. Column aerosol mass and surface area were of the order of 0.05 gm[sup [minus]2] and 2.5 [times] 10[sup 11] [mu]m[sup 2] m[sup [minus]2] in the first half of 1992. 7 refs., 4 figs.

• OSTI ID: 6533925
• Journal Information: Chemical Processing (Chicago); (United States), Journal Name: Chemical Processing (Chicago); (United States) Vol. 56:2; ISSN 0009-2630; ISSN CHPCAI
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring &amp; Transport-- (1990-)
AEROSOL GENERATORS
AEROSOL MONITORING
AEROSOLS
AIR POLLUTION MONITORING
BACKSCATTERING
COLLOIDS
DEVELOPED COUNTRIES
DISPERSIONS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
EUROPE
FEDERAL REPUBLIC OF GERMANY
FLUIDS
GASES
MEASURING INSTRUMENTS
MONITORING
OPTICAL RADAR
RADAR
RAMAN EFFECT
RANGE FINDERS
SCATTERING
SOLS
STRATOSPHERE
SURFACE AREA
SURFACE PROPERTIES
TROPOPAUSE
TROPOSPHERE
VARIATIONS
VOLCANIC GASES
VOLCANOES