Deep Ocean Currents Are Liquid Time Capsules


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 11 January 2019

OCEANS, ICE, & CLIMATE AS PHYSICAL FORCES OVER TIME

Old Research Proves Valuable
HMS CHALLENGER

Painting of the HMS Data collected by HMS Challenger, by William Frederick Mitchell, originally published for the Royal Navy, supports Woods Hole & Harvard Ocean Research today..
Painting of the HMS Challenger, possible collecting Artctic Ocean-bottom temps, by William Frederick Mitchell originally published for the Royal Navy.

 

Deep Ocean Currents Are Liquid Time Capsules

The long memory of the Pacific Ocean,
Woods Hole Oceanographic Institution, January 4, 2019.

MAIN POINTS

“Cold waters that sank in polar regions hundreds of years ago during the Little Ice Age are still impacting deep Pacific Ocean temperature trends.”

“...the deep Pacific Ocean lags a few centuries behind in terms of temperature and is still adjusting to the entry into the Little Ice Age. Whereas most of the ocean is responding to modern warming, the deep Pacific may be cooling.”

"Climate varies across all timescales.”
(and physical spaces, such as ocean bottoms...)

Ancient Cooling Still Moving in Ocean Depths
“If the surface ocean was generally cooling for the better part of the last millennium, those parts of the ocean most isolated from modern warming may still be cooling.”

Goal
“...develop a model of how the interior properties of the ocean respond to changes in surface climate.”

Challenger 1870s Reference Point
“The HMS Challenger, a three-masted wooden sailing ship originally designed as a British warship, was used for the first modern scientific expedition to explore the world’s ocean and seafloor. During the expedition from 1872 to 1876, thermometers were lowered into the ocean depths and more than 5,000 temperature measurements were logged.”

Warming, Except 2KM Cold Zone
“...compared the HMS Challenger data to the modern observations and found warming in most parts of the global ocean, as would be expected due to the warming planet over the 20th Century, but cooling in the deep Pacific at a depth of around two kilometers. ”

We Been Lucky
30% Cooling Ancient Effect
“...variations in surface climate that predate the onset of modern warming still influence how much the climate is heating up today.  Previous estimates of how much heat the Earth had absorbed during the last century assumed an ocean that started out in equilibrium at the beginning of the Industrial Revolution. But Gebbie and Huybers estimate that the deep Pacific cooling trend leads to a downward revision of heat absorbed over the 20th century by about 30 percent.”

 

 

Harvard Report

 

 

The Southern Engine of Ocean Circulation

Antarctic Ocean Circulation Video

Not Just Circulation, but O2 Distribution is also changing:

 

 

OCEANS, ICE, WATER, & MAN

O2 Distribution Changing in World’s Oceans

Critters to Suffer

 

 

Latest Fish News, with Oceans Ice & Water, too

 

January 2019 General Nature News

 

 

 

 

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