JAN 15, 2019 01:33 PM PST

Scientific gaps in ocean warming research

Research published recently in PNAS attempts to shed light on the gaps in scientific knowledge regarding ocean warming. The team of scientists behind the study reconstructed the history of ocean warming and determined evidence to support previous studies that say that the oceans are absorbing over 90% of human-emitted greenhouse gases.

The estimates published in the study state that the ocean began warming decades ago, has absorbed 436 x 1021 Joules from 1871 to present. That quantity accounts for approximately 1000 times the annual worldwide human primary energy consumption. Science Daily also reports that warming was similar throughout the time periods of 1920-1945 and 1990-2015.

The biggest conclusion coming from the study suggests that ocean circulation is the cause of up to half the observed warming and associated sea level rise in low- and mid- latitudes of the Atlantic Ocean in the last 60 years. “During this period, more heat has accumulated at lower latitudes than would have if circulation were not changing,” reports Science Daily.

Professor Samar Khatiwala explained the researchers’ method to measure ocean absorption of human-emitted carbon dioxide: “Our approach is akin to "painting" different bits of the ocean surface with dyes of different colors and monitoring how they spread into the interior over time. We can then apply that information to anything else -- for example humanmade carbon or heat anomalies -- that is transported by ocean circulation. If we know what the sea surface temperature anomaly was in 1870 in the North Atlantic Ocean we can figure out how much it contributes to the warming in, say, the deep Indian Ocean in 2018. The idea goes back nearly 200 years to the English mathematician George Green.”

This research suggests that ocean circulation is the cause of up to half the observed warming and associated sea level rise. Photo: Pixabay

Although this method still lacks validation and it only applies to humanmade greenhouse gases that are passively transported by ocean circulation, it has produced out relatively consistent results. Another researcher on the study, Professor Zanna, commented that the researchers “were pleasantly surprised how well the approach works,” adding, “It opens up an exciting new way to study ocean warming in addition to using direct measurements.”

Sources: Science DailyPNAS

About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
JAN 20, 2020
Earth & The Environment
JAN 20, 2020
Restoring the World's Wetlands
An effort to restore wetlands throughout the United States and the United Kingdom is currently underway. As part of the Associated Press’ “What...
JAN 20, 2020
Earth & The Environment
JAN 20, 2020
Reducing GHG emissions of the transportation sector
The United States Environmental Protection Agency reported that the highest greenhouse gas emissions in 2017 were in the transportation sector, making up a...
JAN 20, 2020
Earth & The Environment
JAN 20, 2020
Tiny Fossils Reveal California's Ocean Acidification History
A century’s worth of microscopic shells has revealed that ocean acidification is occurring in California waters at twice the rate of the global avera...
JAN 20, 2020
Plants & Animals
JAN 20, 2020
The Captivating Mating Process of a Jumping Spider
When you’re a male jumping spider and you fancy finding a female to mate with, you might try your hand – or in this case paddle – at impr...
JAN 20, 2020
Plants & Animals
JAN 20, 2020
Diego the Giant Tortoise Returning to Wild After Saving His Species
One would witness a plethora of exotic animals upon visiting the renowned Galápagos Islands, one of which might be the Galápagos giant tortoi...
JAN 20, 2020
Microbiology
JAN 20, 2020
Photosynthetic Algae Found to Produce Methane
Cyanobacteria are microscopic blue-green algae. These naturally occurring microbes are common, but can also grow into toxic blooms....
Loading Comments...