Subscribe to our free daily newsletters
. Earth Science News .




Subscribe to our free daily newsletters



WATER WORLD
Coral study: Previous warming period inspired sea level rise in fits and starts
by Brooks Hays
Washington (UPI) Oct 19, 2017


According to evidence revealed by a coral reef in the Gulf of Mexico, the planet's oceans didn't rise steadily during previous periods of global warming, but in fits and starts.

At the end of the last ice age, between 20,000 and 10,000 years ago, Earth's glaciers finally began to retreat and melt. As temperatures warmed and glaciers shrunk, meltwater filtered into the oceans and sea levels rose.

New analysis of fossil reefs a few dozen miles off the coast of Corpus Christi suggests corals experienced several accelerated bursts of sea level rise before being inundated completely.

Currently, climate change models treat sea level rise linearly. The latest findings -- detailed in the journal Nature Communications -- suggests a higher degree of variability.

"Our results offer evidence that sea level may not rise in an orderly, linear fashion," Jeff Nittrouer, a coastal geologist at Rive University, said in a news release.

"Sea level rose quite fast, paused, and then shot up again in another burst and so on," added Rice marine geologist André Droxler. "This has profound implications for the future study of sea-level rise.

Coastal reefs live in symbiosis with algae. Coral relies on the microorganisms to turn sunlight into food. Reefs can adapt using a type of growth pattern called backstepping when sea levels rise gradually, but reefs become drowned when levels rise dramatically.

Fossil reefs now 195 feet beneath the surface of the Gulf of Mexico once grew among shallow waters. Their growth patterns can still be analyzed, revealing their attempts to adapt to rising seas some 19,000 years ago.

"The coral reefs' evolution and demise have been preserved," said Rice graduate student Pankaj Khanna. "Their history is written in their morphology -- the shapes and forms in which they grew."

Using 3D imaging technology, researchers surveyed the structures of the coral reefs. They found a series of terraces, evidence that reefs grew vertically during pauses between the bursts of sea level rise.

Researchers found terraces at reefs many miles apart were similarly aligned, and they expect more geologic evidence around the globe will reveal similar signs of stop-and-go sea level rise. As more evidence becomes available, researchers will need to modify their sea level rise prediction models.

"Based on what we've found, it is possible that sea-level rise over decadal time scales will be a key storyline in future climate predictions," Khanna said.

WATER WORLD
Ocean atmosphere rife with microbes
Thuwal, Saudi Arabia (SPX) Oct 18, 2017
Microbes in the atmosphere and the role of the oceans in their movement have been largely overlooked by researchers. Now, an international team shows that the oceans contribute to a large fraction of the microbes found in the global atmosphere. Understanding the oceans' role as a source and sink for airborne microbes can provide insight into the maintenance of microbial diversity and how h ... read more

Related Links
Water News - Science, Technology and Politics


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

WATER WORLD
Mexico quake hit rich and poor alike, but tragedies differ

Thousands still without power in Ireland after freak storm

Risking lives, Mexicans try to salvage belongings after quake

Branson calls for sustainable rebuilding of storm-battered Caribbean

WATER WORLD
Understanding rare earth emulsions

Chemical treatment improves quantum dot lasers

Missing link between new topological phases of matter discovered

Space radiation won't stop NASA's human exploration

WATER WORLD
Wither heavy storms

Toward efficient high-pressure desalination

Huge spike in global carbon emissions linked to El Nino

Active sieving could improve dialysis and water purification filters

WATER WORLD
As ice sheet melts, Greenland's fjords become less salty

Drive for giant new marine sanctuary in Antarctica

Thousands of penguin chicks starve in Antarctica

The melting ice makes the sea around Greenland less saline

WATER WORLD
Little growth observed in India's methane emissions

India to close colonial-era military farms

Smallscale farmers try to solve Amazon's big problems

Genetically boosting the nutritional value of corn could benefit millions

WATER WORLD
WSU researchers document one of planet's largest volcanic eruptions

Lake waves penetrate, disturb the surrounding earth

Is it gonna blow? Measuring volcanic emissions from space

Vietnam braces for more downpours as flood toll hits 72

WATER WORLD
Chad extends key conservation area in national park

Rwanda military uses torture to force confessions: HRW

New witness emerges over Rwandan genocide: French legal source

Nigeria: Cooperation 'key' to defeating jihadists

WATER WORLD
Genome of a 40,000-year-old man in China reveals region's complex human history

New study suggests that last common ancestor of humans and apes was smaller than thought

World Bank: 1.1 bn people 'invisible', lacking official identity

Duplications of noncoding DNA could help explain human-primate split




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement