Search results for "gas [argon]"

Variation of H2O/CO2 and CO2/SO2 ratios of volcanic gases discharged by continuous degassing of Mount Etna volcano, Italy

2008

Light hydrocarbons as a proxy to identify the origin of the gas manifestations in Greece

2017

The geologic emissions of greenhouse gases (CO2 and CH4) have an important natural contribution in the global carbon budget. Tectonics, through faults in geothermal and oil producing areas, play a significant role in the release of C-gases in many non-volcanic regions of the Earth. Methane, the most abundant organic compound in Earth’s atmosphere, has a potential global warming that is 28 times higher than that of CO2 on a 100-year time horizon. In this study, δ13C-CH4, δ2H-CH4 and light hydrocarbon (alkane: CH4, C2H6, C3H8, C3H6, i-C4H10, n-C4H10; alkene C3H6, iC4H8; and aromatic C6H6) gas concentration data of 119 gas samples (103 unpublished data and 16 literature data) from volcanic-hyd…

Mineralogy of the soils altered by fumarolic activity at Nisyros volcano, Greece

2017

Nisyros is the easternmost island of the South Aegean Active Volcanic arc in Greece. It is an active stratovolcano known for its intense hydrothermal activity. In this study we present the results of the mineralogical analyses of 20 soil samples collected in the caldera area. Samples were analysed through X-ray diffraction and the results allow us to divide them in two groups: Lakki Plain and Stefanos Crater. In their majority the soils of Lakki Plain have a main mineralogical assemblage that consists of quartz, feldspar and gismondine (Ca2Al4Si4O16·9H2O). Gismondine as well as stellerite (CaAl2Si7O18·7H2O), which is appearing in some samples, derive from hydrothermal alteration, whilst wol…

Oxygen parameters of blood: Definitions and symbols

1990

Definitions and symbols for relevant parameters of the oxygen status of arterial blood are recommended. The recommendations are as simple as possible, easy to understand, and devoid of misinterpretations and double meanings. The authors propose no new definitions for limited new methods, no combination of symbols and methods, and no association between definition, symbol and commercial name.

A new approach for the measurement of gaseous elemental mercury (GEM) and H2S in air from anthropogenic and natural sources: Examples from Mt. Amiata…

2017

Real-time measurements of GEM and H2S discharged from natural and anthropogenic sources are a valuable tool to investigate the dispersion dynamics of these contaminants in air. In this study, a new approach to measure GEM and H2S concentrations in air, carried out by coupling a portable Zeeman atomic absorption spectrometer with high frequency modulation of light polarization (Lumex RA-915M) and a pulsed fluorescence gas analyzer (Thermo Scientific Model 450i), was applied to two distinct areas: (i) in the surroundings of Piancastagnaio (Siena, Central Italy), located in the eastern flanks of Mt. Amiata (a 200,000Â years old volcano), where three geothermal plants are operating and whose ex…

Multi-component gas emission measurements of the active lava lake of Nyiragongo, DR Congo

2017

Between 2007 and 2011 four measurement campaigns (June 2007, July 2010, June 2011, and December 2011) were carried out at the crater rim of Nyiragongo volcano, DR Congo. Nyiragongo is one of the most active volcanoes in Africa. The ground-based remote sensing technique Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS), which uses scattered sunlight, the in-situ Multi-Component Gas Analyzer System (Multi-GAS) and alkaline impregnated filter were simultaneously applied during all field trips. The bromine monoxide to sulfur dioxide (BrO/SO2) and carbon dioxide to sulfur dioxide (CO2/SO2) molar ratios were determined, among other ratios. During the different field trips variati…

Measurements of volcanic SO2 and CO2 fluxes by combined DOAS, Multi-GAS and FTIR observations: a case study from Turrialba and Telica volcanoes

2014

Over the past few decades, substantial progress has been made to overcome the technical difficulties of continuously measuring volcanic SO2 emissions. However, measurements of CO2 emissions still present many difficulties, partly due to the lack of instruments that can directly measure CO2 emissions and partly due to its strong atmospheric background. In order to overcome these difficulties, a commonly taken approach is to combine differential optical absorption spectroscopy (DOAS) by using NOVAC scan-DOAS instruments for continuous measurements of crateric SO2 emissions, and electrochemical/NDIR multi-component gas analyser system (multi-GAS) instruments for measuring CO2/SO2 ratios of exc…

First volatile inventory for Gorely volcano, Kamchatka

2012

[1] We report here the very first assessment of volatile flux emissions from Gorely, an actively degassing volcano in Kamchatka. Using a variety of in situ and remote sensing techniques, we determined the bulk plume concentrations of major volatiles (H2O ∼93.5%, CO2, ∼2.6%, SO2 ∼2.2%, HCl 1.1%, HF 0.3%, H20.2%) and trace-halogens (Br, I), therefore estimating a total gas release of ∼11,000 tons·day−1during September 2011, at which time the target was non-eruptively degassing at ∼900°C. Gorely is a typical arc emitter, contributing 0.3% and 1.6% of the total global fluxes from arc volcanism for CO2 and HCl, respectively. We show that Gorely's volcanic gas (H2O/SO2 ∼43, CO2/SO2 ∼1.2, HCl/SO2∼…

Iekšējās komunikācijas nozīme komandas veidošanā Kuldīgas novada pašvaldības iestādē “Kuldīgas novada muzejs”

2019

Kvalifikācijas darba saturs ir veltīts iekšējās komunikācijas lomai organizācijās, kā arī Kuldīgas novada pašvaldības iestādes “Kuldīgas novada muzejs” iekšējās komunikācijas nozīmei komandas veidošanā. Ikvienā organizācijā svarīgākais resurss ir cilvēki, kas tajā strādā. Šiem cilvēkiem un iekšējai komunikācijai starp darbiniekiem un organizāciju ir svarīga loma komandas darbā, līdz ar to organizācijas panākumu gūšanā. Kvalifikācijas darba pētījuma mērķis ir analizēt iekšējo komunikāciju Kuldīgas novada pašvaldības iestādē “Kuldīgas novada muzejs” un izprast tās nozīmi komandas veidošanā, izmantojot divas pētniecības metodes – aptauju un interviju. Pēc pētījumā gūtajiem rezultātiem var seci…

Iekšējā komunikācija kā darbinieku motivācijas instruments SIA ”Rīgas Austrumu klīniskā universitātes slimnīca” stacionārā "Gaiļezers"

2016

Bakalaura darbā „Iekšējā komunikācija kā darbinieku motivācijas instruments SIA „Rīgas Austrumu klīniskā universitātes slimnīca” stacionārā „Gaiļezers” tiek apskatīts un analizēts iekšējās komunikācijas process stacionārā, kā arī komunikācijas procesa ietekme uz darbinieku motivāciju strādāt SIA „Rīgas Austrumu klīniskā universitātes slimnīca” stacionārā „Gaiļezers”. Darbs sastāv no četrām nodaļām. Pirmajās divās nodaļās tiek apkopota teorētiskā literatūra par iekšējo komunikāciju uzņēmumā un motivācijas teorijām. Metodoloģijas daļā tiek apskatītas pētījumā pielietotās metodes – daļēji strukturētā intervija un anketēšana. Empīriskajā daļā tiek veikta pētījumā iegūto datu analīze. Pētījuma n…