نتایج جستجو برای: volcanic areas

تعداد نتایج: 414965  

2011
Angela Remer

Active volcanoes give significant threats to the populations that live in their proximity. The Three Sisters Volcanic region is one of 9 threatening volcanoes within the Cascades volcanic arc. Eruptions are probable which makes it essential to complete hazard, vulnerability, and risk assessments so that proper planning, education and mitigation procedures can be implemented prior to the threat ...

2018
Roberto Spina

OPEN ACCESS This open-access article is distributed under the terms of the Creative Commons Attribution Non-Commercial License (CC BY-NC) (http:// creativecommons.org/licenses/by-nc/4.0/), which permits reuse, distribution and reproduction of the article, provided that the original work is properly cited and the reuse is restricted to noncommercial purposes. For commercial reuse, contact reprin...

2016
Christopher M. Colose Allegra N. LeGrande Mathias Vuille

Volcanic aerosols exert the most important natural radiative forcing of the last millennium. Stateof-the-art paleoclimate simulations of this interval are typically forced with diverse spatial patterns of volcanic forcing, leading to different responses in tropical hydroclimate. Recently, theoretical considerations relating the intertropical convergence zone (ITCZ) position to the demands of gl...

Journal: :Occupational and environmental medicine 2002
A Searl A Nicholl P J Baxter

BACKGROUND AND AIMS The Soufriere Hills volcano, Montserrat, has been erupting since July 1995 and volcanic ash has fallen on the island throughout most of the eruption. The ash contains substantial quantities of respirable particles and unusually large amounts (15-20%) of the crystalline silica mineral, cristobalite. The purpose of the surveys described here, undertaken between December 1996 a...

2003
Amit Segev Eytan Sass Hagai Ron Barbu Lang Yehoshua Kolodny Michael McWilliams

Segev, A., Sass, E., Ron, H., Lang, B., Kolodny, Y., McWilliams, M. 2002. Stratigraphic, geochronologic, and paleomagnetic constraints on Late Cretaceous volcanism in northern Israel. Isr. J. Earth Sci. 51: 297–309. Late Cretaceous volcanism in northern Israel is represented by basaltic pyroclastics and lavas at two adjacent localities at Mount Carmel and the Umm el Fahm area. Four Cenomanian a...

2002
m. erdélyi

A portable modular gas sensor for measuring the 13 C/ 12 C isotopic ratio in CO 2 with a precision of 0.8%o(±1σ) was developed for volcanic gas emission studies. This sensor employed a difference frequency generation (DFG)-based spectroscopic source operating at 4.35 µm (∼ 2300 cm −1) in combination with a dual-chamber gas absorption cell. Direct absorption spectroscopy using this specially des...

2009
V. L. Hansen I. López

Introduction. Venus' ribbon tessera terrain [1,2] (rtt) records ancient environmental conditions significantly different than contemporary Venus [3,4], and geologic relations are consistent with rtt representing the oldest locally exposed unit across Venus [5], although individual tracts of rrt may have formed at differnet times [6]. We have constructed a global geologic map of rtt exposures an...

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