Featured Research

from universities, journals, and other organizations

Liverpool Scientist Discovers New Layer Of The Earth

Date:
April 14, 2005
Source:
University Of Liverpool
Summary:
A University of Liverpool scientist has discovered a new layer near the Earth's core, which will enable the internal temperature of the Earth's mantle to be measured at a much deeper level than previously possible.

April 14, 2005 -- A University of Liverpool scientist has discovered a new layer near the Earth's core, which will enable the internal temperature of the Earth's mantle to be measured at a much deeper level than previously possible.

Related Articles


Dr Christine Thomas, from the Department of Earth Sciences, has found a previously undetected seismic layer near the Earth's core-mantle boundary. Her discovery will allow geophysicists to measure variations in the Earth's internal temperature near the boundary between the rocky mantle and fluid core, about 2,900 km below the Earth's surface.

Dr Thomas developed a model with colleagues at University of California Los Angeles (UCLA), which uses a recently discovered phase change (when atoms are compressed into crystals under high pressure) in the lowest part of the Earth's mantle. They propose that temperature changes in this area can result in the creation of two seismic layers near the core-mantle boundary, the second of which has been recently discovered by Dr Thomas.

The two seismic layers can provide a sensitive thermometer with which researchers can take the temperature of the Earth's lowermost mantle. The layers also enable scientists to examine whether cold subducted lithosphere (cold areas beneath a plate which can cause earthquakes) is reaching the core-mantle boundary, and whether hot material rises from the area between the core and mantle.

In the first case, the two seismic layers should be visible in seismic waves that travel through the Earth; the latter case would not show any layers. This would be a strong case for the convection of the whole mantle that is still a highly debated issue in the Earth Sciences.

Dr Thomas said: "Our discovery marks an exciting stage in earth science research as it provides the possibility to test the debated issue of whole mantle convection, the largely unconstrained heat flow from the Earth's core to the mantle and the fate of subducted lithosphere with seismic data."

###

The research is published in the journal, Nature, today.


Story Source:

The above story is based on materials provided by University Of Liverpool. Note: Materials may be edited for content and length.


Cite This Page:

University Of Liverpool. "Liverpool Scientist Discovers New Layer Of The Earth." ScienceDaily. ScienceDaily, 14 April 2005. <www.sciencedaily.com/releases/2005/04/050414110928.htm>.
University Of Liverpool. (2005, April 14). Liverpool Scientist Discovers New Layer Of The Earth. ScienceDaily. Retrieved March 3, 2015 from www.sciencedaily.com/releases/2005/04/050414110928.htm
University Of Liverpool. "Liverpool Scientist Discovers New Layer Of The Earth." ScienceDaily. www.sciencedaily.com/releases/2005/04/050414110928.htm (accessed March 3, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Tuesday, March 3, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Solar Plane Passes New Test Ahead of World Tour

Solar Plane Passes New Test Ahead of World Tour

AFP (Mar. 2, 2015) A solar-powered plane made a third successful test flight in the United Arab Emirates on Monday ahead of a planned round-the-world tour to promote alternative energy. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Heavy Toll as Australian Farmers Struggle Through Drought

Heavy Toll as Australian Farmers Struggle Through Drought

AFP (Mar. 2, 2015) Mounting debts, despair and forced repossessions are taking a heavy toll on farmers in parts of Australia suffering from its worst drought in 100 years. Duration: 02:16 Video provided by AFP
Powered by NewsLook.com
'Doomsday' Vault Stores Tree Seeds In Case Of Armageddon

'Doomsday' Vault Stores Tree Seeds In Case Of Armageddon

Newsy (Mar. 2, 2015) The Svalbard Global Seed Vault, also known as the "doomsday" vault, took its first contribution of tree seeds this week. Video provided by Newsy
Powered by NewsLook.com
Chile on Alert as Volcano Spews Smoke and Ash

Chile on Alert as Volcano Spews Smoke and Ash

Reuters - News Video Online (Mar. 2, 2015) Chile&apos;s massive Villarrica volcano remains on yellow alert as it belches out incandescent fragments at night with nearby communities placed on alert. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins