Post-Pinatubo Evolution and Subsequent Trend of the Stratospheric Aerosol Layer Observed by Mid-Latitude Lidars in Both Hemispheres

Lidar observations of the stratospheric aerosol layer have been carried out at Tsukuba and Naha, Japan, and at Lauder, New Zealand. Evolution of the volcanic aerosols originating from the 1991 Mt. Pinatubo volcanic eruptions, and the subsequent trend and seasonal variations of the background aerosols, are evaluated. Stratospheric aerosol drastically increased to about 30 to 100 times of the background level after the eruption, and returned to calm condition after about five years. The e-folding time of the integrated backscattering coefficient of Pinatubo aerosols at the three stations shows similar values between 1.14 and 1.37 years. The column amount of background stratospheric aerosol over Lauder is about 3 times as much as that over Naha, and that over Tsukuba is between the other two sites. Seasonal variation of stratospheric aerosol over Tsukuba shows the largest value and is nearly 10 times as much as that over Naha. The background aerosols over Lauder increased after around 2000. The increasing rate observed over Lauder is about 3.8%/year from 2000 to 2009.

[1]  F. G. Fernald.  Analysis of atmospheric lidar observations: some comments. , 1984, Applied optics.

[2]  T. Deshler.  A review of global stratospheric aerosol: Measurements, importance, life cycle, and local stratospheric aerosol , 2008 .

[3]  D. Winker,et al.  Evolution of the Pinatubo Volcanic Cloud Over Hampton, Virginia , 1995, Optical Remote Sensing of the Atmosphere.

[4]  H. Jäger,et al.  Trends in the nonvolcanic component of stratospheric aerosol over the period 1971–2004 , 2006 .

[5]  Lidar observation of the stratospheric aerosol layer over Okinawa, Japan, after the Mt. Pinatubo volcanic eruption , 1993 .

[6]  J. Coakley,et al.  Climate Forcing by Anthropogenic Aerosols , 1992, Science.

[7]  M. Manning,et al.  Carboxy terminus of vasopressin required for activity but not binding , 1984, Nature.

[8]  H. Jäger.  Long‐term record of lidar observations of the stratospheric aerosol layer at Garmisch‐Partenkirchen , 2005 .

[9]  John E. Barnes,et al.  Increase in background stratospheric aerosol observed with lidar at Mauna Loa Observatory and Boulder, Colorado , 2009 .

[10]  H. Jäger,et al.  Correction to “Lidar backscatter to extinction, mass and area conversions for stratospheric aerosols based on midlatitude balloonborne size distribution measurements” , 2003 .

[11]  C. Ammann.  Volcanic eruptions and climate: A data and model intercomparison , 2002 .

[12]  J. Angell.  Estimated impact of Agung, El Chichon and Pinatubo volcanic eruptions on global and regional total ozone after adjustment for the QBO , 1997 .

[13]  D. Hofmann,et al.  Lidar measurements of stratospheric aerosol over Mauna Loa Observatory , 1997 .

[14]  Arlin J. Krueger,et al.  Global tracking of the SO2 clouds from the June , 1992 .

[15]  O. Uchino,et al.  Extensive lidar observations of the Pinatubo aerosol layers at Tsukuba (36.1°N), Naha (26.2°N), Japan and Lauder (45.0°S), New Zealand , 1995 .

[16]  H. Jäger,et al.  Ground‐based remote sensing of the decay of the Pinatubo eruption cloud at three northern hemisphere sites , 1995 .

[17]  John R. Lanzante,et al.  Effect of Volcanic Eruptions on the Vertical Temperature Profile in Radiosonde Data and Climate Models , 2009 .