Study: Global warming is weakening key ocean circulation

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Study: Global warming is weakening key ocean circulation‘Tulsa World

Study: Global warming is weakening key ocean circulation

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This image provided by the Potsdam Institute for Climate Impact Research in April 2018 shows observed ocean temperature changes since 1870, and currents in the Atlantic Ocean. A study released on Wednesday, April 11, 2018 suggests flobal warming is likely slowing the main Atlantic Ocean circulation, which has plunged to its weakest level on record. (PIK via AP)

The slowdown in the circulation ‘ a crucial part of Earth’s climate ‘ had been predicted by computer models, but researchers said they can now observe it. It could make for more extreme weather across the Northern Hemisphere, especially Europe, and could increase sea level rise along the U.S. East Coast, they said.

The slowdown also raises the prospect of a complete circulation shutdown, which would be a dangerous “tipping point,” according to a study in Wednesday’s journal Nature .

Such a shutdown was the premise of the scientifically inaccurate 2004 disaster movie “The Day After Tomorrow.” Study authors said a collapse is at least decades away but would be a catastrophe.

  • Publisher: Tulsa World
  • Author: Seth Borenstein Associated Press
  • Twitter: @tulsaworld
  • Citation: Web link

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Not to change the topic here:

Major North Atlantic Ocean circulation system is weakening

New research just published in the journal Nature shows that the Atlantic Meridional Overturning Circulation (AMOC) has slowed down (weakened) since the mid-20th century and that it may have reached a new record low. Ocean observations go back to 1870.

The AMOC is a large-scale system of ocean currents that circulates warm, salty water from the South Atlantic and tropics via the Gulf Stream to the colder North Atlantic. There, warm salty waters cool, release heat and eventually sink to the deep ocean and move south. The AMOC plays a key role in the Earth’s climate and is a major component of the Global Conveyor Belt. (via NOAA).)

The international research team that conducted this study used computer model simulations to reconstruct changes in the AMOC over time. By comparing these simulations with recent direct ocean measurements, they were able to conclude that the AMOC slowed down by about 15 percent since the 1950s.

The waters along the NE U.S. shelf and Gulf of Maine have warmed 99 percent faster then the global oceans as a whole over the past 10 years.

The slowing of the AMOC is also having an impact on the distributions of fish and their prey, according to the NOAA Fisheries Service report.

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.

Watching: Potsdam Institute, Climate Impact Research, Atlantic Ocean. A

What people are talking about:

Serious disruption to the Gulf Stream ocean currents that are crucial in controlling global climate must be avoided ‘at all costs’, senior scientists have warned. The alert follows the revelation this week that the system is at its weakest ever recorded.
‘Avoid at all costs’: Gulf stream’s record weakening prompts warnings
Dangerous climate tipping point is ‘about a century ahead of schedule’ warns scientist

Study: Global warming is weakening key ocean circulation
on 14th of Apr 2018 WASHINGTON (AP) ‘ Global warming is likely slowing the main Atlantic Ocean circulation, which has plunged to its weakest level on record, according to a new study. The slowdown in the circulation ‘ a crucial part of Earth’s climate ‘ had been

Major North Atlantic Ocean circulation system is weakening
(Apr 2018) The AMOC plays a key role in the Earth’s climate and is a major component of the Global . the study. Key excerpts from the report . .. ‘That fingerprint consists of a pattern of cooling in the North Atlantic Ocean’s subpolar gyre and a warming

Something additional to look at:

Atlantic Ocean Currents are Weakening, May Bring More Winter Storms and Summer Heat Waves
(Apr 2018) Two new scientific papers have confirmed that currents in the Atlantic Ocean are slowing down . Related: Climate: soil could speed up global warming way more than we thought ‘It depends on how severe the weakening will be in the future.

Gulf Stream System At Its Weakest In 1,600 Years, Study Shows
(Apr 2018) (CNN) ‘ Global warming’s having an adverse effect . atmospherically before sinking to the depths of the ocean, and traveling south to the Antarctic, where it starts its journey again. The study’s findings ‘suggest that the AMOC has weakened

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