Carbon dioxide (CO2), and Sulfur dioxide (SO2)
Once a volcano erupts, gases are emitted and released into the atmosphere. During large eruptions, gases have actually caused global climate change. In other systems, gases are emitted continuously into the atmosphere from soils, volcanic vents, fumaroles and hydrothermal deposits. However, volcanic gases reach the stratosphere, a layer in the atmosphere from about 10 km to about 50 km in altitude, during large eruptions. This relationship is complicated by the fact that the elevation between the volcano summit and the distance to the troposphere/stratosphere decreases with latitude. The most abundant gas is water vapor (H2O), followed by carbon dioxide (CO2), and sulfur dioxide (SO2). Secondary gases are also commonly emitted from volcanoes and include hydrogen sulfide (H2S), hydrogen (H), carbon monoxide (CO), hydrogen chloride (HCl), hydrogen fluoride (HF), and helium (He). However, volcanic gases reach the stratosphere, a layer in the atmosphere from about 10 km to about 50 km in altitude, during large eruptions. This relationship is complicated by the fact that the elevation between the volcano summit and the distance to the troposphere/stratosphere decreases with latitude. Another common gas emitted during a volcanic eruption is sulfur dioxide, and emissions of this gas may have the most significant impact on the Earth's climate. When sulfur dioxide is ejected into the stratosphere it gets converted to sulfuric acid aerosols, which are tiny sulfuric acid droplets. Volcanic eruptions emit water vapor and toxic gases into the atmosphere. Learn about the gases emitted from an erupting volcano, such as carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrochloric acid and carbon monoxide and their effects in this video lesson. The gases associated with a volcanic eruption are initially dissolved in magma, which is hot molten rock found in the deeper layers of earth. During a volcanic eruption these gases are released into the atmosphere. The most abundant gas expelled during a volcanic eruption is water vapor. Water vapor is not toxic and because so much is expelled during an eruption, it can actually benefit the planet by pulling water from deep within the Earth and adding it to the water cycle. Volcanic eruptions emit water vapor and toxic gases into the atmosphere. Learn about the gases emitted from an erupting volcano, such as carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrochloric acid and carbon monoxide and their effects in this video lesson. The most abundant gas released from volcanic eruptions is water vapor. Other emitted gases include carbon dioxide (CO 2), sulfur dioxide (SO 2), hydrogen sulfide (H 2 S), carbon monoxide (CO), hydrogen chloride (HCl), and hydrogen fluoride (HF). Water vapor is the most abundant greenhouse gas in Earth’s atmosphere. Changes in the concentration of water vapor in our atmosphere are not attributed directly to industrialization, but to feedbacks related to climate warming. What are the most abundant gases in the atmosphere? We know that nitrogen (at about 78%) and oxygen (at about 20 %) are the most abundant gases in the atmosphere. By inspection, it's obvious that there is only a couple of perce … nt for all the other gases combined. The most common type of volcanic eruption occurs when magma (the term for lava when it is below the Earth's surface) is released from a volcanic vent. Eruptions can be effusive, where lava flows like a thick, sticky liquid, or explosive, where fragmented lava explodes out of a vent. In explosive eruptions, the fragmented rock may be accompanied by ash and gases; in effusive eruptions, degassing is common but ash is usually not. Several types of volcanic eruptions —during which lava, tephra (ash, lapilli, volcanic bombs and blocks), and assorted gases are expelled from a volcanic vent or fissure —have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. There are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra. Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption.
http://volcano.oregonstate.edu/book/export/html/151 http://volcano.oregonstate.edu/book/export/html/151 http://study.com/academy/lesson/volcanic-eruption-gases-released-their-effects.html http://study.com/academy/lesson/volcanic-eruption-gases-released-their-effects.html http://ete.cet.edu/gcc/?/volcanoes_greenhouse/ http://www.answers.com/Q/What_are_the_most_abundant_gases_emitted_during_basaltic_volcanism http://geology.com/volcanoes/types-of-volcanic-eruptions/ https://en.wikipedia.org/wiki/Types_of_volcanic_eruptions
two most abundant gases from eruptions