Atlantic Ocean Current Slows Down To 1000

This entry was posted in Unexplored on by . [^]

Atlantic Ocean Current Slows Down To 1000-Year Low, Studies Show‘NPROcean Current That Keeps Europe Warm Is Weakening‘SmithsonianAtlantic Ocean Currents are Weakening, May Bring More Winter Storms and Summer Heat Waves‘Newsweek

Atlantic Ocean Current Slows Down To 1000-Year Low, Studies Show

An Atlantic Ocean current that helps regulate the global climate has reached an 1,000-year low, according to two new studies in the journal Nature.

While scientists disagree about what’s behind the sluggish ocean current, the shift could mean bad news for the climate. The Atlantic Meridional overturning circulation [AMOC] ‘ often called the conveyor belt of the ocean ‘ exchanges warm water from the equator with cold water in the Arctic.

“The last 100 years has been its lowest point for the last few thousand years,” Jon Robson, a researcher at the University of Reading and one of the study’s authors, told The Washington Post. “These two new papers do point strongly to the fact that the overturning has probably weakened over the last 150 years.”

The AMOC “plays a key role in the distribution of heat” across the Earth, but that is being disrupted by melting ice, particularly from Greenland, causing larger volumes of freshwater to flow through the oceans, says David Thornalley, a geologist at University College London and the lead author of one of the new studies.

“A key part of the overturning circulation, this AMOC, is the formation of dense water,” he tells Here & Now’s Lisa Mullins. “The problem is that freshwater isn’t very dense and it stops you forming those dense waters.”

  • logo
  • Publisher: NPR.org
  • Twitter: @NPR
  • Citation: Web link

Not to change the topic here:

Ocean Current That Keeps Europe Warm Is Weakening

Great Britain and Ireland can be a little chilly, but they’re surprisingly balmy for their latitude. These regions have an ocean current to thank for that warm(ish) weather. Known as the Atlantic Meridional Overturning Circulation (AMOC), the current works like a conveyor belt, drawing warm water up from the Gulf Stream to North America’s east coast and then shunting it toward Europe.

But, as Victoria Gill at the BBC reports, two new studies suggest that the AMOC is the weakest it’s been in over 1,600 years, with the most drastic changes taking place in the last 150 years.

The first study, published in the journal Nature, addresses the history of the AMOC. Researchers studied the size of the grains in cores of sediment from the ocean floor. As Andrea Thompson at Scientific American reports, the stronger a current is, the larger the grains of sediment it can move, allowing researchers to map changes in current strength by sediment size. The team also looked for tiny fossil critters, known as foraminifera of “forams,” to get a sense of ocean temperatures. Since some species of foram thrive in warm waters while others prefer cooler temps, researchers can use foram species as a rough thermometer for past ocean temperature.

In the second study in Nature, the team used state-of-the-art climate models and a century of ocean sea surface temperatures to study AMOC changes. The results of both studies suggest that the AMOC is weak, but when that change started is up for debate.

As Summer K. Praetorius writes for Nature, the sediment core study suggests that the AMOC began weakening in 1850, the beginning of the industrial era. She also points out that the change corresponds with the end of the Little Ice Age, a climate dip that lasted from the 1300s to 1850s. As the climate warmed up, it’s possible more fresh water flowed into the oceans, which disrupted the AMOC.

  • logo
  • Publisher: Smithsonian
  • Author: Jason Daley
  • Twitter: @smithsonianmag
  • Citation: Web link

Atlantic Ocean Currents are Weakening, May Bring More Winter Storms and Summer Heat Waves

Two new scientific papers have confirmed that currents in the Atlantic Ocean are slowing down. Ocean currents play a large role in global weather, and a slowdown in the Atlantic could mean serious weather changes, particularly in Europe and North America.

The two studies, both published in the online journal Nature on Thursday,’presented evidence to show that ocean currents in the Atlantic are changing. Both studies focused on the Atlantic meridional overturning circulation,’a system of ocean currents found in the North Atlantic.

One study measured circulation patterns and temperature changes from a 5.2 million square mile patch of cold water in the North Atlantic to’better understand how today’s currents compare with those of the past, IFL Science reported. The second study used a combination of three methods to understand how currents have changed over time. This involved observing changes in the size of sediments on the ocean floor, looking at temperature patterns over time’and analyzing the types of organisms that lived on the ocean floor throughout various moments in time.’

Both reports gave the same conclusion: Currents in the Atlantic Ocean are slowing down. The first study estimated that these currents have slowed down by 15 percent, putting them at the slowest they have been in 1,500 years.

David J.R. Thornalley, senior lecturer of paleoclimate at University College London and senior study author for the research that looked at the size of sediments on the ocean floor, told Newsweek that although ocean currents have slowed down in the past because of natural occurrences, this most recent slowdown is human induced as a result of climate change.

  • logo
  • Publisher: Newsweek
  • Date: 2018-04-13T10:59:49-04:00
  • Twitter: @newsweek
  • Citation: Web link

Watching: Weakening Atlantic Ocean Currents, Bring More Winter Storms, Show
An Atlantic Ocean

What people are talking about:

Slow Motion Ocean: Why Are North Atlantic Currents Weakening?
Atlantic Ocean Currents are Weakening, May Bring More Winter Storms and Summer Heat Waves
Gulf Stream system at its weakest in 1,600 years, study shows
[Banned] /r/WayOfTheBern/: Stronger evidence for a weaker Atlantic overturning circulation
Global warming is weakening key ocean circulation, scientists say
Climate change dials down Atlantic Ocean heating system
The oceans’ circulation hasn’t been this sluggish in 1,000 years. That’s bad news.
Gulf Stream system at weakest point in 1,600 years | Environment| All topics from climate change to conservation | DW
World's weather 'facing CHAOS because Atlantic Ocean's circulation is at weakest point for 1500 years'

Comments

Will X work in Bloodpod for the midrange slot? A state of the deck and discussion about "the midrange slot".
(Spoilers Extended) Jon Snow: His is the Song of Ice and additionaly Fire
[Misc] Winter 2018 Event Review – The View from a Beginner, Part 2
here's what my resources looked like upon starting actually the event.
Map of E-2 before unlocking the second starting point
Map of E-3 after unlocking the shortcut from the J-node to the N-node
Map of E-7 without Battleship Princess Kai HP phase unlocked
Map of E-7 during Abyssal Crane Princess HP phase at X-node without shortcuts
Map of E-7 during Abyssal Crane Princess HP phase at X-node with B- to D-node and H- to K-node shortcuts unlocked
a beautiful, heart-melting finale version of Tsukiyomi
Re:UA | Chapter Six: A Hemisphere In Flames [1860]
Series of 5 Elemental Dragons, Looking rather for feedback!
took steps to expand the elemental dragon pantheon
Shi the Calamity (Black/Shadow Dragon, CR 16..?) – Statblock incoming
I wrote probably a poem for English class and I would like others opinions on it as well as any way that I could improve upon it.

Atlantic Ocean Current Slows Down To 1,000
on 13th of Apr 2018 An Atlantic Ocean current that helps regulate the global climate has reached an 1,000-year low, according to two new studies in the journal Nature. While scientists disagree about what’s behind the sluggish ocean current, the shift could mean bad news for

Climate change dials down Atlantic Ocean heating system
(Apr 2018) A significant shift in the system of ocean currents that helps keep parts of Europe warm could send temperatures in the UK lower, scientists have found. They say the Atlantic Ocean circulation system is weaker now than it has been for more than 1,000 years

In case you’re also interested:

Atlantic Ocean Currents are Weakening, May Bring More Winter Storms and Summer Heat Waves
on 13th of Apr 2018 Two new scientific papers have confirmed that currents in the Atlantic Ocean are slowing down. Ocean currents play a large role in global weather, and a slowdown in the Atlantic could mean serious weather changes, particularly in Europe and North America.

Ocean Current That Keeps Europe Warm Is Weakening
on 13th of Apr 2018 These regions have an ocean current to thank for that warm(ish) weather. Known as the Atlantic Meridional Overturning Circulation (AMOC), the current works like a conveyor belt, drawing warm water up from the Gulf Stream to North America’s east coast and

Video