Volcanic Clouds from the 2007 Eruption of Jebel at Tair (Yemen) Detected by Ground Based and Space Borne Lidar

Shibata, Takashi; Kouketsu, Takeharu

doi:10.2151/sola.2008-024

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…[30] Volcanic clouds originating from relatively small eruptions are often detected by space-borne lidar CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) on board the satellite CALIPSO (Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observations) [e.g., Shibata and Kouketsu, 2008]. The lidar observed aerosol layer at Biak cannot be seen in January 2011 in the browsing images of CALIOP observation (http://www-calipso.larc.nasa.gov/ products/lidar/browse_images/), but is visible in November 2010 in the images at the same level of the layer observed by Biak lidar.…”

Section: Aerosol Layermentioning

confidence: 99%

Cirrus cloud appearance in a volcanic aerosol layer around the tropical cold point tropopause over Biak, Indonesia, in January 2011

et al. 2012

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[1] An aerosol layer was found 1-2 km around the tropical cold point tropopause by observations using ground-based lidar and balloon-borne optical particle counters (OPC) over Biak, Indonesia, in January 2011. The layer was observed throughout the survey period from 6 to 13 January. The backscattering coefficient of the layer was about 5 times larger than that of the background aerosols. The lidar-observed depolarization ratio of the layer was very low, and the wavelength dependence of the backscattering coefficients of the layer was similar to that of stratospheric aerosols. A layer of the particles at the size of the accumulation mode was also observed by an OPC at ambient temperature, but the particles were volatile at 200 C. These properties indicate that the aerosol layer was composed of liquid phase aqueous sulfuric acid solution particles and probably originated from a volcanic eruption. It was observed by lidar that a thin cirrus cloud layer appeared within this aerosol layer. Backward trajectory analysis and satellite-observed equivalent blackbody temperature indicate that the cirrus cloud layer probably formed in situ. The estimated upper limit of the number concentration of cloud particles was 10 5 m À3 . The number concentration of the volatile aerosol particles ($3 Â 10 6 m À3) was 30 times larger than this upper limit. This upper limit, however, is comparable to the aerosol particle concentration observed by the OPC at 200 C. These results are consistent with the cirrus cloud formation with solid sulfate particles in tropical upper troposphere suggested by previous studies.

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Section: Aerosol Layermentioning

confidence: 99%

Cirrus cloud appearance in a volcanic aerosol layer around the tropical cold point tropopause over Biak, Indonesia, in January 2011

et al. 2012

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“…Carn et al (2008b) demonstrate the use of CALIOP data in analysis of the Soufrière Hills, Montserrat and Rabaul, Papua New Guinea clouds in 2006. CALIOP data can also be used to estimate mass concentrations of aerosols, which can subsequently be compared to the estimated SO 2 mass from other sensors as demonstrated by Shibata and Kouketsu (2008).…”

Section: Caliopmentioning

confidence: 99%

Observations of volcanic emissions from space: current and future perspectives

Thomas

Watson

2009

Nat Hazards

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Volcanoes worldwide pose a major threat to humans at both local and global scales. The effective monitoring of volcanoes is essential to manage and reduce risk associated with the threat that they pose. The measurement of volcanic cloud composition can provide important clues to the underlying volcanic processes and can be indicative of impending eruption. Hazards posed by plumes to humans and animals are significant, as well as the potential climatic impacts and the threat to aircraft by the ingestion of volcanic ash all justify careful monitoring. Recent advances in instrument technology have allowed for high resolution monitoring of volcanic clouds from satellite-based instruments. There exists a suite of instruments with varying spatial, spectral and temporal resolutions, which when used in conjunction can provide detailed information about cloud properties. Such instruments have the capability to quantify sulphur dioxide, ash and aerosol content as well as the spatial and vertical distribution of species. Here we present an overview of the range of instruments useful for such monitoring, outline their functionality and describe the potential of future missions.

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The 2007–8 volcanic eruption on Jebel at Tair island (Red Sea) observed by satellite radar and optical images

Jónsson

2014

Bull Volcanol

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Volcanic Clouds from the 2007 Eruption of Jebel at Tair (Yemen) Detected by Ground Based and Space Borne Lidar

Cited by 4 publications

References 12 publications

Cirrus cloud appearance in a volcanic aerosol layer around the tropical cold point tropopause over Biak, Indonesia, in January 2011

Cirrus cloud appearance in a volcanic aerosol layer around the tropical cold point tropopause over Biak, Indonesia, in January 2011

Observations of volcanic emissions from space: current and future perspectives

The 2007–8 volcanic eruption on Jebel at Tair island (Red Sea) observed by satellite radar and optical images

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