Friday, 26 April, 2019


Oceans will change color in less than 100 years, scientists warn

Birdseye shot of green ocean creating waves on a sandy beach Oceans will change color in less than 100 years, scientists warn
Kristine Garrett | 05 February, 2019, 14:25

Climate change is changing populations of small, microscopic algae that float through the water column known as phytoplankton.

Writing in the journal Nature Communications, Hickman and colleagues from the United Kingdom and U.S. report how they came to their conclusions by using a computer model that predicts how factors such as temperature, ocean currents and ocean acidity affects the growth and types of phytoplankton in the water, as well as levels of other coloured organic matter and detritus.

Phytoplankton contain chlorophyll, which absorbs blue portions of sunlight and reflects the green, giving their waters a greenish hue.

She continued, "The changes won't appear huge to the naked eye, and the ocean will still look like it has blue regions in the subtropics and greener regions near the equator and poles".

That, the researchers said, was probably down to a number of factors, including that shifts in ocean colour take into account not only changes in the overall amount of phytoplankton - which can vary dramatically, for example with the season - but also changes in the species present, an important consideration since different types of phytoplankton use chlorophyll yet absorb slightly different wavelengths of light. "That basic pattern will still be there".

Oceans will change color by the end of the century, as climate change significantly alters phytoplankton in the world's seas, according to a new study.

As Earth's oceans warm, they will become more blue.

After building their ocean model, which simulated how global warming's effects on temperature, acidification, currents and mixing will impact the metabolism and proliferation of different phytoplankton species, researchers incorporated their spectral analysis to simulate the impacts of shifts in phytoplankton communities on the ocean's color. However, in an important twist to previous studies, they also explored how such changes would affect the absorption and reflection of light at the ocean surface.

As ocean waters continue to warm - killing off vital coral reefs and disrupting ecosystems in the process - the tiny plants that make up phytoplankton will begin to thrive in new areas and die off in others. "We are interested in phytoplankton because they are tiny marine plants, they contribute about half of global photosynthesis, they are the base of the marine food web".

"Without them there wouldn't be any life in the ocean", says MIT's Stephanie Dutkiewicz, lead author on the new study. Regions that are nutrient-rich, including those near the poles, "may turn even deeper green, as warmer temperatures brew up larger blooms of more diverse phytoplankton".

One way to monitor changes on a global scale is through observing the color of the ocean satellite data. While chlorophyll levels could be altered by the effects of global warming, natural events such as El Niño can also cause an uptick in chlorophyll.

The shifting colors of the ocean is tied to the organisms that live in the surface of the water.

The more phytoplankton there are in the water, the greener the colour, the fewer there are the bluer the colour.

Scientists say there will be less of them in the waters in the decades to come. "But the change in the colour of the ocean will be one of early warning signals that we really have changed our planet".

Dutkiewicz observed that this blue or green wave band showed a very clear signal, or shift, due specifically to climate change.

Recommended

loading...
...

Iraq angered by Trump idea to watch Iran from United States base Iraq angered by Trump idea to watch Iran from United States  base But U.S. troops have no right to do that, said Iraqi President Barham Salih, adding that Trump's comments were "surprising". ISIS fighters in that region were described by operation officials as "battle-experienced, hardened and well disciplined".

Pope Francis holds open-air Mass in Abu Dhabi - thousands attend Pope Francis holds open-air Mass in Abu Dhabi - thousands attend The pontiff's two-day trip to the Muslim-majority United Arab Emirates aims to promote greater understanding between faiths . The UAE is involved in the conflicts in Yemen, Syria and Libya .

Seven dead in Paris apartment fire Seven dead in Paris apartment fire Some in the apartment building climbed onto the roof to escape the flames; others tried to climb out the windows. Paris Mayor Anne Hidalgo wrote on social network Twitter that the city was in mourning after the incident.

This company will launch the world’s first smartphone with 18,000mAh battery This company will launch the world’s first smartphone with 18,000mAh battery The Ultimate U620S, on the other hand, will be launched in June this year in two colors: Purple/Blue and Blue/Green gradients. 9to5Google reports that Energizer will have four lines of phones: Power Max, Ultimate, Energy, and Hardcase.

Google parent beats Wall Street estimates, but spending worries investors Google parent beats Wall Street estimates, but spending worries investors Google CEO Sundar Pichai made sure to thank outgoing Google Cloud CEO Diane Greene for her efforts during his prepared remarks. Pichai said Google's cloud computing unit a year ago doubled the number of deals it struck worth more than $1 million.

Meghan Markle Hires A Doula For Childbirth & Prince Harry Getting ‘Coaching’ Lessons Meghan Markle Hires A Doula For Childbirth & Prince Harry Getting ‘Coaching’ Lessons The project provides women with practical and emotional support, including expert advice and crisis care to hot showers and lunch. But One25's CEO Anna Smith told BAZAAR.com it was a moment she will never forget.

Samsung Galaxy J8 Coming Next Month Samsung Galaxy J8 Coming Next Month That means apps will be able to use security measures like facial recognition and fingerprint scans easily to secure access. However, what many people don't know is that Samsung is also adding the finishing touches to Galaxy S10 at the same time .

Freezing rain, roller-coaster temperatures Freezing rain, roller-coaster temperatures To the south, rain showers will wind down, with a chance of snow showers on the back edge of the precipitation before ending. Surfaces such as highways, roads, walkways and parking lots may become hard to navigate due to accumulating snow.

Bertens and Vekic set for final showdown in St Petersburg Bertens and Vekic set for final showdown in St Petersburg Netherlands' Kiki Bertens celebrates winning her semi-final match against Belarus' Aryna Sabalenka . Sabalenka has been in much better form in 2019 and she seems to be playing better tennis.

UK Home Office approves Mallya’s extradition to India UK Home Office approves Mallya’s extradition to India Vijay Mallya is accused in India of conspiracy to defraud, make false representations and launder money, added the spokesperson. April 18, 2017: Scotland Yard arrests Mallya on an extradition warrant after he surrenders at a central London police station.

Iran launches NEW Hoveyzeh missile on 40th anniversary on Islamic Revolution Iran launches NEW Hoveyzeh missile on 40th anniversary on Islamic Revolution The Defence Ministry's website carried an undated video purportedly showing the Hoveizeh being test-fired from a mobile launcher. Amir Hatami said the missile hit its target in the Saturday test after travelling 1,200 kilometres (745 miles).

Elon Musk just showed off SpaceX's Starship Raptor engine firing Elon Musk just showed off SpaceX's Starship Raptor engine firing SpaceX has been developing the Raptor engine over the last few years as part of its plan to eventually send tourists to Mars. Merlins use kerosene and liquid oxygen (LOX) propellants, for example, whereas Raptors use liquid methane and LOX.

New addition Porzingis practices with Mavericks New addition Porzingis practices with Mavericks I think about basketball 24/7, and I really see us being very special on the court and fun to watch, so I'm excited about it". Still, the trade seemingly came out of nowhere after a meeting between Knicks brass and Porzingis and his agent on Thursday.

Fate of Mexican drug lord El Chapo now rests with USA jury Fate of Mexican drug lord El Chapo now rests with USA  jury The defense claims Guzman's role has been exaggerated by cooperating witnesses who are seeking leniency in their own cases. El Chapo was extradited from Mexico to the United States in early 2017; the drug lord had often escaped from custody.

Why Super Bowl Viewers Are Still Outraged by the Halftime Show Why Super Bowl Viewers Are Still Outraged by the Halftime Show There are a number of words you could use to describe Maroon 5's halftime show performance: Empty. Now, there has been a huge revelation regarding the performance of the band in the show.