Evolution of the Pinatubo volcanic cloud over Hampton, Virginia

Osborn, M. T.; DeCoursey, Robert J.; Trepte, Charles R.; Winker, David M.; Woods, David C.

doi:10.1029/95gl00815

Cited by 52 publications

(38 citation statements)

References 7 publications

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“…Decay times of the Pinatubo aerosols were reported as 10.3 months at Garmisch-Partenkirchen (47.5°N, 11.1°E) (Jäger 2005), 1 year at Mauna Loa (19.5°N, 156°W) (Barnes and Hofmann 1997), and approximately 10.1 months over Hampton Virginia (37.1°N, 76.3°W) (Osborn et al 1995). The observations at Tsukuba, Naha and Lauder show slower decay.…”

Section: Discussionmentioning

confidence: 97%

“…Long term lidar observations of the stratospheric aerosol were carried out from the 1970s at several sites such as Hampton (Osborn et al 1995), Garmisch-Partenkirchen (Jäger 2005) and Mauna Loa (Barnes and Hofmann 1997). An increase trend of the stratospheric aerosol since post-Pinatubo minimum has been observed at Mauna Loa and Boulder (Hofmann et al 2009).…”

Section: Introductionmentioning

confidence: 99%

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

Nagai

Liley

Sakai³

et al. 2010

SOLA

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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.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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

Nagai

Liley

Sakai³

et al. 2010

SOLA

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“…In previous versions, the primary method to fill missing data in the mid and high latitude lower stratosphere between June 1991 and mid-1993 were data from the NASA Langley 48-inch Lidar Facility (Osborn et al, 1995) and data from the University of 10…”

Section: Filling Gaps In the Sage II Data Set: Alternative Data Setsmentioning

confidence: 99%

A global, space-based stratospheric aerosol climatology: 1979 to 2016

Thomason¹,

Vernier²,

Bourassa³

et al. 2017

Preprint

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We describe the construction of a continuous 38-year record of stratospheric aerosol optical properties. The Global Space-based Stratospheric Aerosol Climatology, or GloSSAC, provided the input data to the 15 construction of the Climate Model Intercomparison Project stratospheric aerosol forcing data set (1979 to 2014) and we have extended it through 2016 following an identical process. GloSSAC focuses on the Stratospheric Aerosol and Gas Experiment (SAGE) series of instruments through mid-2005 and on the Optical Spectrograph and InfraRed Imager System (OSIRIS) and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) data thereafter. We also use data from other space 20 instruments and from ground-based, air and balloon borne instruments to fill in key gaps in the data set. The end result is a global and gap-free data set focused on aerosol extinction coefficient at 525 and 1020 nm and other parameters on an 'as available' basis. For the primary data sets, we developed a new method for filling the post-Pinatubo eruption data gap for 1991 to 1993 based on data from the Cryogenic Limb Array Etalon Spectrometer. In addition, we developed a new method for populating wintertime high 25 latitudes during the SAGE period employing a latitude-equivalent latitude conversion process that greatly improves the depiction of aerosol at high latitudes compared to earlier similar efforts. We report data in the troposphere only when and where it is available. This is primarily during the SAGE II period except the most enhanced part of the Pinatubo period. It is likely that the upper troposphere during Pinatubo was greatly enhanced over non-volcanic periods and that domain remains substantially under characterized. 30We note that aerosol levels during the OSIRIS/CALIPSO period in the lower stratosphere at mid and high latitudes is routinely higher than what we observed during the SAGE II period. While this period had nearly continuous low-level volcanic activity, it is possible that the enhancement in part reflects deficiencies in the data set. We also expended substantial effort to quality assess the data set and the product is by far the best we have produced. GloSSAC version 1.0 is available in netCDF format at the NASA Atmospheric 35 Data Center at https://eosweb.larc.nasa.gov/. GloSSAC users should cite this paper and the data set DOI

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“…In particular, the question arises of the reality of a stratospheric aerosol background which is always obscured by successive volcanic eruptions (see Fig. 4 in Osborn et al, 1995). In Fig.…”

Section: Time Evolution Of the Volcanic Stratospheric Aerosolsmentioning

confidence: 99%

Evidence of transport, sedimentation and coagulation mechanisms in the relaxation of post-volcanic stratospheric aerosols

2001

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Abstract. Spatio-temporal distributions of stratospheric aerosols, measured by the ORA instrument from August 1992 until May 1993, are presented in the latitude range (40• S-40• N). Particle total number density, mode radius and distribution width are derived and interpreted. The respective roles of advection, sedimentation and coagulation are discussed. We also identify clear transport/sedimentation patterns and we show the enhancement of coagulation in stagnation regions. Efficient transport of aerosol particles up to 50 km is suggested.

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Evolution of the Pinatubo volcanic cloud over Hampton, Virginia

Cited by 52 publications

References 7 publications

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

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

A global, space-based stratospheric aerosol climatology: 1979 to 2016

Evidence of transport, sedimentation and coagulation mechanisms in the relaxation of post-volcanic stratospheric aerosols

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