volcanic ash
Synthesis of Zeolitic Material on the Basis of Natural Raw Material Volcanic Ash in Presence of Tetraethylammonium Iodide
... Thus, increase of the crystallization speed of mordenite type zeolite from volcanic ash (compared with known methods) is achieved due to high alkalinity of RM and introduction of crystal seed. ...
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Evaluation of Jebel Marra Volcanic Ash as Supplementary Cementitious Material for Use in Blended Cements
... the volcanic ash obtained from Jebel Marra (mountains) west of Sudan as potential Supplementary Cementitious Materials for use in blended cement and ...the volcanic ash and its reactivity ...
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Volcanic ash detection with infrared limb sounding: MIPAS observations and radiative transfer simulations
... and volcanic ash clouds and that is as insensitive as possible towards changes in trace gas concentrations, we chose two narrow spectral windows close to the 830 and 950 cm −1 windows in ...where ...
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Estimating building vulnerability to volcanic ash fall for insurance and other purposes
... and volcanic ash ...for ash fall loading, which were included in 2015 for the first time in the Global Assessment ...to ash fall, GAR15 focused on 11 out of 47 building types (WAPMERR schema; ...
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Free-fall experiments of volcanic ash particles using a 2-D video disdrometer
... of ash cloud detections were reported in several observational cases in the US and Japan (Maki and Doviak, 2001; Maki et ...explosive volcanic eruptions detected by weather radars from 1970 to ...analyze ...
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Multi-level emulation of a volcanic ash transport and dispersion model to quantify sensitivity to uncertain parameters
... of volcanic ash concentration using volcanic ash trans- port and dispersion ...mean ash column loading in 75 geographical regions on 14 May ...
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A model sensitivity study of the impact of clouds on satellite detection and retrieval of volcanic ash
... During development of satellite detection and retrieval al- gorithms, the outcomes of these algorithms must be com- pared and tested against “true value” data sets. These data sets may come from either observations or ...
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Strong responses of Southern Ocean phytoplankton communities to volcanic ash
... the volcanic ash fertilization hypothesis has generally relied on either measuring trace metals released from ash ...to ash addition [Duggen et ...Icelandic volcanic ash in a ...
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Impact of Volcanic Ash on Road and Airfield Surface Skid Resistance
... Under typical conditions, road markings reduce accident rates [76] as they provide continuous visual guidance of features such as road edges and centres. However, when non-mechanical markings such as paint and ...
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The Characteristic and Genesis of Volcanic Ash Soil in the North Slope Toposequence of Kawi Mountain in Malang Regency
... The volcanic ash soil in Kawi Mountain is composed by the amorphous materials consist of allophane, imogolite and ...of volcanic ash soils is usually > 85 ...the volcanic ash ...
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Improvements of volcanic ash fall forecasts issued by the Japan Meteorological Agency
... a Volcanic Ash Fall Forecast (VAFF) system to issue forecasts of areas in Japan where ash falls are expected following volcanic ...of ash falls vary according to the quantity of ...
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Utilization of WRF-Chem Modelling for Barujari Mount of Volcanic Ash Distribution Analysis
... analyse volcanic ash spread using WRF-Chem model, we can use NCEP FNL on 3 rd of November 2015 on ...GTS. Volcanic ash spreading data from Himawari-8 is used as a ...Chem, volcanic ...
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The transport of Icelandic volcanic ash: insights from northern European cryptotephra records
... ne ash over northern Europe have occurred with a mean return interval of 56 ± 9 years over the last 1000 years [Swindles et ...such volcanic ash reaching northern ...km) ash fallout. ...
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Volcanic ash detection and retrievals using MODIS data by means of neural networks
... the ash retrievals are computed by using the MODTRAN 4 (Berk et ...the volcanic plume altitude and thickness, and the volcanic ash optical ...the volcanic area). In all the cases ...
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Oldoinyo Lengai Volcanic Ash for Removal of Hydrogen Sulfide and Ammonia from Biogas
... world. Volcanic ash formed earlier during eruptions was collected from different sites along the mountain, and its po- tency to adsorb hydrogen sulfide (H 2 S) and ammonia (NH 3 ) from biogas was ...
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from thermal infrared satellite measurements: correction procedures for the effects of volcanic ash
... the volcanic ash optical properties. The ash opti- cal properties (single scattering albedo, extinction coefficient and asymmetry parameter) have been computed using the Mie code developed by the ...
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Forecasting volcanic ash deposition using HYSPLIT
... a Volcanic Ash Advisory Centre (VAAC), to model airborne volcanic ash, with meteorological data provided by external and in-house NWP (Numerical Weather Prediction) models, which operate with ...
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Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: a study of archived basaltic to rhyolitic ash samples
... of volcanic ash across eruptions has prohibited consensus on when (or if ) ash will be ...which volcanic ash can initiate a pro- inflammatory response are largely unconstrained [8, ...
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Nature and origin of volcanic ash in the 2000 eruption of Usu volcano, southwestern Hokkaido, Japan
... Katsui, Y., Y. Oba, K. Onuma, T. Suzuki, Y. Kondo, T. Watanabe, K. Niida, T. Uda, S. Hagiwara, T. Nagao, J. Nishikawa, M. Yamamoto, Y. Ikeda, H. Katagawa, N. Tsuchiya, M. Shirahase, S. Nemoto, S. Yokoyama, T. Soya, T. ...
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Observation of volcanic ash from Puyehue–Cord´on Caulle with IASI
... IASI ash retrieval presented here has been developed based on a scheme successfully used for remote sensing of mineral (desert) ...and volcanic ash have large similarities insofar as they both are ...
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