Stratospheric aerosol change in the early stage of volcanic disturbance by the Pinatubo eruption observed over Tsukuba, Japan

Journal Article · Fri Apr 09 00:00:00 EDT 1993 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/93GL00511· OSTI ID:6437551

Hayashida, Sachiko; Sasano, Yasuhiro

An increase in the amount of stratospheric aerosol due to the Pinatubo eruption (June 12-15, 1991, 15.14[degree]N, 120.35[degree]E) was observed from the end of June by a lidar in NIES, Tsukuba (36[degree]N, 140[degree]E). The first arrival of volcanic aerosol layers was observed just above the tropopause on June 28, 1991, only two weeks after the eruption. Aerosol layers higher than 20 km appeared sporadically in July and August, reflecting the inhomogeneity of aerosol distribution. After the change in the wind system from summer easterlies to winter westerlies, the main body of the volcanic aerosol layer made its appearance over Tsukuba. The integrated backscattering coefficient (IBC) increased in winter as a result of transportation of aerosols from the tropical region. The IBC, which can be converted to optical thickness, exceeded the level of the value observed after the El Chichon eruption. 15 refs., 4 figs.

• OSTI ID: 6437551
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Vol. 20:7; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROSOLS
ECOLOGICAL CONCENTRATION
VARIATIONS
OPTICAL RADAR
BACKSCATTERING
VOLCANOES
ERUPTION
JAPAN
LAYERS
STRATOSPHERE
TROPOPAUSE
ASIA
COLLOIDS
DEVELOPED COUNTRIES
DISPERSIONS
EARTH ATMOSPHERE
MEASURING INSTRUMENTS
RADAR
RANGE FINDERS
SCATTERING
SOLS
TROPOSPHERE
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)