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How do the core samples from ice tells us about the atmosphere?
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How do scientists measure the composition of the Earth's early atmosphere?
The Antarctic is one of the last unspoiled areas on earth. Air gets trapped in packed snow fall, later gets very packed, sometimes slightly melted, but not enough for the air to get out. This process has gone on for millions of years. When scientists take ice core samples, it is for the air that is trapped, deep down, where it was trapped millions of years ago. They take these samples, into a laboratory, where they carefully extract the air samples. Then they will use a gas chromatograph, IR spectrum analyzer, or other instrumentation to determine the composition of the air sample. The depth of the ice core determines the age of the earth at the time, and with the many ice core samples taken, there are many to compare it to for which to make a better determination.
How much carbon dioxide was in the atmosphere 10000 years ago?
About 260 ppm. According to ice core samples, CO2 values ranged between 250 to 280 ppm over the past 800,000 years, up until 1700.
How do scientists find out about the earth's past climate?
most reliable is core samples In ice warmer weather gives deepersnow per seasonal cycle, think artic ice. tree ring dating , also core samples of ocean floor sediment ;man has keep records fr 3 to 5 thousand years mostly in languages nobody speaks ,but nature has always keepamazing records
Is ice pure water?
Ice from distilled water would be pure. However, everyday ice contains dissolved gasses. For instance, historic greenhouse gas levels can be measured from ice core samples from the Antarctic ice sheet because these gasses were trapped in the layers of ice.
How do scientists know the co2 level of earth's past atmosphere?
Ice cores contain gases representative of the atmosphere at the time the original snow fell, and thus are used for exploring ancient atmosphere properties. An upper age of about 800 000 years is the limit at present. The ice core also contains dust and radioactive fallout, and these contaminants serve as precise markers in the core. Very old ice does not preserve the annual climate bands that are such an aid to precise dating. CO2 is one of the embedded gases. [The ratio of the various isotopes of oxygen are a proxy for the temperature of the Earth, for the atmospheric mixing is reasonably quick.]
How are some ways climatologists use tree rings and ice core samples similar?
By examining tree rings and ice core samples, climatologists are able to determine the environmental and climate situation prevalent at the time the tree was growing and when the water froze.
With evidence which indicates increases in atmospheric concentrations of oxides of sulfur and nitrogen?
ice core samples
How do scientists measure the composition of the Earth's early atmosphere?
The Antarctic is one of the last unspoiled areas on earth. Air gets trapped in packed snow fall, later gets very packed, sometimes slightly melted, but not enough for the air to get out. This process has gone on for millions of years. When scientists take ice core samples, it is for the air that is trapped, deep down, where it was trapped millions of years ago. They take these samples, into a laboratory, where they carefully extract the air samples. Then they will use a gas chromatograph, IR spectrum analyzer, or other instrumentation to determine the composition of the air sample. The depth of the ice core determines the age of the earth at the time, and with the many ice core samples taken, there are many to compare it to for which to make a better determination.
In the day after tomorrow movie why did Jack Hall take ice core samples from Antarctica?
they measure ice caps to see how quickly theyre melting waatsup
What is the atmosphere on europa?
Europa doesn't have an atmosphere, the vacuum of space meets the ice covering the liquid water and rocky core of the moon.
Why would they study samples of ancient ice?
The ice captures samples of the atmosphere at the time as well as any wind-blown particles like dust, dirt, spores, particulates, seeds, volcanic ash, soot from forest fires etc. By studying the samples of ice, scientists can make conclusions about what the environment was like when the ice formed. This is how we know that the atmosphere of the earth had a much higher oxygen content millions of years ago as well as knowing something about the plants, fungi, etc. that were present.
What are scientists trying to understand about the climate of Earth by analyzing these ice samples?
The Gasses trapped in the air bubbles of the ice in the different levels can tell them what the atmosphere was like when the ice was formed, each layer of ice represents an different year or group of years, it has been there a very long time and provides a timeline of the earths climate changes to help predict what we are going to see in the future. It takes a lot of samples to get a complete picture. Sometimes there wont be a good sample in a particular core for a given time period so multiple cores are needed.
What were the carbon dioxide levels in the atmosphere 250000 years ago?
(Another contributor wrote:)About 260 ppm. According to ice core samples, CO2 values ranged between 250 to 280 ppm over the past 800,000 years, up until 1700.
How much carbon dioxide was in the atmosphere 10000 years ago?
About 260 ppm. According to ice core samples, CO2 values ranged between 250 to 280 ppm over the past 800,000 years, up until 1700.
Is there ice on the planet Uranus?
there are trace ice crystals in the atmosphere swirling around faster then an F5 tornado but uranus has no solid surface and its core would be to hot so the question is yes it does have ice in atmosphere but not on the surface as it has none its a gas giant
Why is jack hall taking ice core samples from antarctica?
Jack Hall was studying the greenhouse gases in ice cores from Antarctica because runaway greenhouse gases are causing global warming.
How do scientists know the atmospheric levels of carbon dioxide that exist on earth hundreds or thousands of years ago?
They measure it from bubbles of gas trapped in Antarctic ice.Primarily by the scientific examination of Ice Core Samples taken thousands of feet Deep from thousands of Sites around Earth.It is an interesting process really. When ice freezes, it has very tiny atmospheric gas bubbles trapped in the ice. There is a place in the Antarctic, known as Lake Vostok, that we are able to take and drill down very deep and get very clean samples of what the air was like. These samples will tell us what the atmosphere was like at a given time, by how far down the sample was taken from. From these cores, we are able to get actual gas bubbles of atmosphere from up to 650,000 years ago.
