TY - JOUR

T1 - Climate/chemistry effects of the Pinatubo volcanic eruption simulated by the UIUC stratosphere/troposphere GCM with interactive photochemistry

AU - Rozanov, EV

AU - Schlesinger, ME

AU - Andronova, NG

AU - Malyshev, SL

AU - Zubov, VA

PY - 2002/11

Y1 - 2002/11

N2 - The influence of the sulfate aerosol formed following the massive Pinatubo volcanic eruption in June 1991 on the chemical composition, temperature, and dynamics of the atmosphere has been investigated with the University of Illinois at Urbana-Champaign (UIUC) stratosphere-troposphere General Circulation Model (GCM) with interactive photochemistry (ST-GCM/PC). Ensembles of five runs have been performed for the unperturbed (control) and perturbed (experiment) conditions. The simulated repartitioning within the chlorine and nitrogen groups, as well as the ozone changes, are in reasonable quantitative agreement with observations and theoretical expectations. The simulated ozone changes in the tropics reveal the ozone mixing ratio decreases below 28 km and increases in the stratosphere above this level. However, these changes are not statistically significant in the lowermost stratosphere. The simulated total ozone loss reached 15% over the northern middle and high latitudes in winter and early spring. However, the simulated changes are statistically significant only during early winter. The magnitude of the simulated total ozone depletion is generally less than that observed, but some members of the experiment ensemble are in better agreement with the observed ozone anomalies. The model simulates a pronounced stratospheric warming in the tropics, which exceeds the warming derived from observations by 1-2 K. The model matches well the intensification of the polar-night jet (PNJ) in December 1991 and 1992, the statistically significant cooling of the lower stratosphere and warming of the surface air in boreal winter over the United States, northern Europe, and Russia, and the cooling over Greenland, Alaska, and Central Asia.

AB - The influence of the sulfate aerosol formed following the massive Pinatubo volcanic eruption in June 1991 on the chemical composition, temperature, and dynamics of the atmosphere has been investigated with the University of Illinois at Urbana-Champaign (UIUC) stratosphere-troposphere General Circulation Model (GCM) with interactive photochemistry (ST-GCM/PC). Ensembles of five runs have been performed for the unperturbed (control) and perturbed (experiment) conditions. The simulated repartitioning within the chlorine and nitrogen groups, as well as the ozone changes, are in reasonable quantitative agreement with observations and theoretical expectations. The simulated ozone changes in the tropics reveal the ozone mixing ratio decreases below 28 km and increases in the stratosphere above this level. However, these changes are not statistically significant in the lowermost stratosphere. The simulated total ozone loss reached 15% over the northern middle and high latitudes in winter and early spring. However, the simulated changes are statistically significant only during early winter. The magnitude of the simulated total ozone depletion is generally less than that observed, but some members of the experiment ensemble are in better agreement with the observed ozone anomalies. The model simulates a pronounced stratospheric warming in the tropics, which exceeds the warming derived from observations by 1-2 K. The model matches well the intensification of the polar-night jet (PNJ) in December 1991 and 1992, the statistically significant cooling of the lower stratosphere and warming of the surface air in boreal winter over the United States, northern Europe, and Russia, and the cooling over Greenland, Alaska, and Central Asia.

KW - Pinatubo

KW - aerosol

KW - chemistry

KW - ozone

KW - volcanic effects

KW - climate

KW - MOUNT-PINATUBO

KW - TEMPERATURE-CHANGES

KW - MODEL SIMULATION

KW - OZONE DEPLETION

KW - EL CHICHON

KW - AEROSOL

KW - IMPACT

KW - SURFACE

KW - CHEMISTRY

KW - AGUNG

U2 - 10.1029/2001JD000974

DO - 10.1029/2001JD000974

M3 - статья

VL - 107

JO - Journal of Geophysical Research D: Atmospheres

JF - Journal of Geophysical Research D: Atmospheres

SN - 2169-897X

IS - D21

M1 - 4594

ER -