Featured Research

from universities, journals, and other organizations

Earth's interior cycles contribute to long-term sea-level and climate change, researchers find

Date:
March 18, 2013
Source:
New York University
Summary:
Ancient rises in sea levels and global warming are partially attributable to cyclical activity below Earth's surface, researchers have concluded in an analysis of geological studies. However, changes spurred by Earth's interior are gradual, taking place in periods ranging from 60 million to 140 million years -- far less rapidly than those brought on by human activity.

Ancient rises in sea levels and global warming are partially attributable to cyclical activity below Earth's surface, researchers have concluded in an analysis of geological studies. However, changes spurred by Earth's interior are gradual, taking place in periods ranging from 60 million to 140 million years -- far less rapidly than those brought on by human activity.
Credit: Kobes / Fotolia

Ancient rises in sea levels and global warming are partially attributable to cyclical activity below Earth's surface, researchers from New York University and Ottawa's Carleton University have concluded in an analysis of geological studies.

However, the article's authors, NYU's Michael Rampino and Carleton University's Andreas Prokoph, note that changes spurred by Earth's interior are gradual, taking place in periods ranging from 60 million to 140 million years -- far less rapidly than those brought on by human activity.

Their analysis appears in Eos, a newspaper published by the American Geophysical Union.

Rampino and Prokoph's analysis considers long-term fluctuations in global climate, diversity of marine organisms, and sea level changes, aiming to identify a unifying cause for these changes. While much scientific study has centered on phenomena above Earth's crust, less attention has historically been paid to changes deep inside our planet.

In recent years, however, researchers have examined the upwelling of mantle plumes -- the rising up of heated rocks from earth's mantle that reach Earth's surface. These plumes have a notable impact on one geologic occurrence: the eruption of large igneous provinces (LIPs), which are large accumulation of rocks formed from congealed lava.

In their analysis of recent scientific findings, Rampino and Prokoph observe that mantle plumes coincide with cyclical surface changes, suggesting that the plumes themselves may be cyclical in nature. For example, Prokoph's previous research has found that many geological changes had cycles of 60 and 140 million years and suggested the cyclical uprising of these plumes to form hotspots -- areas on Earth's surface where volcanic activity has endured.

More broadly, the researchers write, mantle plumes push up against Earth crust, shifting water to continents, thereby producing sea-level rise, and precipitating volcanic activity, which produces additional CO2, leading to a warmer climate.

"Mantle plumes appear to show regular cycles," Rampino explained. "So what's remarkable is there is a strong indication of a connection between changes on Earth's surface -- such as volcanic activity and rising sea levels -- and what's occurring deep inside Earth. This suggests a fascinating and powerful union between below-surface geological events and changes in our climate."


Story Source:

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


Cite This Page:

New York University. "Earth's interior cycles contribute to long-term sea-level and climate change, researchers find." ScienceDaily. ScienceDaily, 18 March 2013. <www.sciencedaily.com/releases/2013/03/130318132819.htm>.
New York University. (2013, March 18). Earth's interior cycles contribute to long-term sea-level and climate change, researchers find. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2013/03/130318132819.htm
New York University. "Earth's interior cycles contribute to long-term sea-level and climate change, researchers find." ScienceDaily. www.sciencedaily.com/releases/2013/03/130318132819.htm (accessed April 24, 2014).

Share This



More Earth & Climate News

Thursday, April 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Fungus Killing Bats, Spreading in US

Deadly Fungus Killing Bats, Spreading in US

AP (Apr. 24, 2014) A disease that has killed more than six million cave-dwelling bats in the United States is on the move and wildlife biologists are worried. White Nose Syndrome, discovered in New York in 2006, has now spread to 25 states. (April 24) Video provided by AP
Powered by NewsLook.com
New Pictures of Ship That Sank in 1888

New Pictures of Ship That Sank in 1888

AP (Apr. 24, 2014) Federal researchers have released new images of the City of Chester, a steamship that sank in San Francisco Bay in 1888. Researchers recently found the shipwreck while mapping shipping routes. (April 24) Video provided by AP
Powered by NewsLook.com
Risk of Asteroid Hitting Earth Higher Than Thought, Study Shows

Risk of Asteroid Hitting Earth Higher Than Thought, Study Shows

Reuters - US Online Video (Apr. 23, 2014) A group of space explorers say the chance of a city-obliterating asteroid striking Earth is higher than scientists previously believed. Deborah Gembara reports. Video provided by Reuters
Powered by NewsLook.com
UN Joint Mission Starts Removing Landmines in Cyprus

UN Joint Mission Starts Removing Landmines in Cyprus

AFP (Apr. 23, 2014) The UN mission in Cyprus (UNFICYP) led a mine clearance demonstration on Wednesday in the UN-controlled buffer zone where demining operations are being conducted near the Cypriot village of Mammari. Duration: 01:00 Video provided by AFP
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:
from the past week

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