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The all-female crew sailing the world to study plastic pollution
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Take the plunge into 'one of the last wildernesses on Earth'
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Meet the man who swam through the Great Pacific Garbage Patch
Polar bears take some cajoling as pen pals. First you need to find one, then sedate it and quickly give it the necessary tools before it wakes up. It’s an awkward first encounter – how many friendships do you know that start with a tranquilizer dart? – and admittedly a one-sided correspondence, but soon they’re sending messages daily.
Every morning, Jon Aars, a senior researcher at the Norwegian Polar Institute, receives a batch of emails from several female polar bears in the High Arctic, checking in and letting him know where they are. “It’s always a nice way to start the day,” he says.
Svalbard, a Norwegian archipelago north of the mainland, is an ideal place for Aars to study a section of the world’s estimated 26,000 remaining polar bears. “(There are) about 300 living in Svalbard year-round,” he explains, “if you fly for one hour, most of the time you find one.”
Russia —
In Ryrkaypiy, a village in Russia's Far Eastern region of Chukotka, polar bears come in close contact with humans in December 2019. Higher than average temperatures driving coastal ice melt prevented over 60 bears from migrating, forcing them to approach the village in search of food.
TASS/TASS/Maxim Deminov/TASS
Florida —
A flooded street in Miami Beach in September 2015. The flood was caused by a combination of seasonal high tides and what many believe is a rise in sea levels due to climate change. Miami Beach has already built miles of seawalls and has embarked on a five-year, $400 million stormwater pump program to keep the ocean waters from inundating the city.
Joe Raedle/Getty Images North America/Getty Images
Virginia —
Sea water collects in front of a home in Tangier, Virginia, in May 2017. Tangier Island in Chesapeake Bay has lost two-thirds of its landmass since 1850. Now, the 1.2 square mile island is suffering from floods and erosion and is slowly sinking. A paper published in the journal Scientific Reports states that "the citizens of Tangier may become among the first climate change refugees in the continental USA."
JIM WATSON/AFP/AFP/Getty Images
Austria —
The Pasterze glacier is Austria's largest and it's shrinking rapidly: the sign on the trail indicates where the foot of the glacier reached in 2015, a year before this photo was taken. The European Environmental Agency predicts the volume of European glaciers will decline by between 22 percent and 89 percent by 2100, depending on the future intensity of greenhouse gases.
Sean Gallup/Getty Images Europe/Getty Images
Greenland —
A NASA research aircraft flies over retreating glaciers on the Upper Baffin Bay coast of Greenland. Scientists say the Arctic is one of the regions hit hardest by climate change.
Mario Tama/Getty Images
Switzerland —
A wooden pole that had been driven into the ice the year before now stands exposed as the Aletsch glacier melts and sinks at a rate of about 10-13 meters per year near Bettmeralp, Switzerland.
Sean Gallup/Getty Images Europe/Getty Images
Louisiana —
In the Mississippi Delta, trees are withering away because of rising saltwater, creating "Ghost Forests."
John Rubenstahl/CNN Air
California —
A street is flooded in Sun Valley, Southern California in February 2017. Powerful storms have swept Southern California after years of severe drought, in a "drought-to-deluge" cycle that some believe is consistent with the consequences of global warming.
David McNew/Getty Images North America/Getty Images
South Africa —
The carcass of a dead cow lies in the Black Umfolozi River, dry from the effects of a severe drought, in Nongoma district north west from Durban, in November 2015. South Africa ranks as the 30th driest country in the world and is considered a water-scarce region. A highly variable climate causes uneven distribution of rainfall, making droughts even more extreme.
MUJAHID SAFODIEN/AFP/AFP/Getty Images
Sudan —
A gigantic cloud of dust known as "Haboob" advances over Sudan's capital, Khartoum. Moving like a thick wall, it carries sand and dust burying homes, while increasing evaporation in a region that's struggling to preserve water supplies. Experts say that without quick intervention, parts of the African country -- one of the most vulnerable in the world -- could become uninhabitable as a result of climate change.
AFP/Getty Images
Maldives —
Low tide reveals the extent of accelerated erosion shown by the amount of exposed beach rocks on Maafushi beach in the Maldives. This is the world's lowest-lying country, with no part lying more than six feet above sea level. The island nation's future is under threat from anticipated global sea level rise, with many of its islands already suffering from coastal erosion.
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Argentina —
Los Glaciares National Park, part of the third largest ice field in the world, on November 27, 2015 in Santa Cruz Province, Argentina. The majority of the almost 50 large glaciers in the park have been retreating during the past 50 years due to warming temperatures, according to the European Space Agency (ESA).
Mario Tama/Getty Images South America/Getty Images
Kenya —
A boy from the remote Turkana tribe in Northern Kenya walks across a dried up river near Lodwar, Kenya. Millions of people across Africa are facing a critical shortage of water and food, a situation made worse by climate change.
Christopher Furlong/Getty Images Europe/Getty Images
India —
An Indian farmer in a dried up cotton field in the southern Indian state of Telangana, in April 2016. Much of India is reeling from a heat wave and severe drought conditions that have decimated crops, killed livestock and left at least 330 million people without enough water for their daily needs.
NOAH SEELAM/AFP/AFP/Getty Images
Honduras —
Strawberries lost due to a fungus that experts report is caused by climate change in La Tigra, Honduras, in September 2016. According to Germanwatch's Global Climate Risk Index, Honduras ranks among the countries most affected by climate change.
ORLANDO SIERRA/AFP/AFP/Getty Images
This is what climate change looks like
Each year, Aars and his colleagues at the Institute capture around 70 polar bears and fit them with a tracking collar which continuously logs movement. Once a day the collar makes a satellite call, transmitting the last 24 hours of data back to the Institute, where it lands in Aars’ inbox.
“Data from movement has been very important to understand how they react and how they might respond to climate change,” Aars explains.
These large mammals are canaries in this frigid coal mine. A warming climate means a vast amount of sea ice is melting in the region, and rising temperatures are also preventing seasonal ice – which melts and recurs annually – from forming in places it once did. Several seal species – polar bears’ main prey – rely on sea ice, Aars explains, and more often than not, where sea ice can be found, so too polar bears. But these creatures are being forced to move with the times.
“Because conditions change, (polar bears) will use more time on land and look for different options,” he explains. “They hunt reindeer, they will take more birds and eggs. We have seen that bears are in different areas than they used to be – so much further north.”
Along with the tracking collar, the Institute weighs bears and takes samples to monitor their health and diet, as well as testing for evidence of pollutants. The collar can also record body temperature, which can tell scientists if a bear has moved inside a den – an indication the animal is going to give birth.
A sedated polar bear awaits testing and tracking by the Norwegian Polar Institute.
Magnus Andersen
Sea ice loss is also having an impact on where polar bears are born, says Aars: “A layer of sea ice on top of the ocean makes it possible for bears to walk long distances. Important areas that they used to go to give birth to cubs are more or less lost, because you don’t have sea ice on those islands anymore.”
Bears are now swimming as far as 200 kilometers(124 miles) to reach an island den, he adds, something they did not need to do 20 years ago.
“Polar bears are optimistic animals,” Aars says. “It seems that they are quite resistant, and they are doing quite well despite the fact that they’ve lost a lot of their habitat.” Despite the odds, Svalbard’s polar bear numbers do not appear to have decreased in the last 20 years, he says.
That may not always be the case, though. According to NASA, summer ice in the Arctic is shrinking by more than 13% each decade, and this year the National Snow and Ice Data Center (NSIDC) reported the second lowest levels of summer sea ice ever recorded. The 14 lowest levels of sea ice have all occurred in the past 14 years, according the NSIDC.
Aars, who has worked on Svalbard since 2003, says "glaciers are not where they used to be," and have retreated hundreds of meters, even kilometers.
Norwegian Polar Institute
Put simply, the prognosis is not good. “You don’t find polar bears anywhere in the Arctic where you don’t have sea ice at least seasonally,” says Aars. “Change is so significant and so fast, we will reach some stage in the future where it will get much harder to be a polar bear in Svalbard.”
In the meantime, his research could reveal how to help his pen pals hold out a little longer.
“What is important for us is that all this data tells us how they will respond in the future,” he adds. “Of course, you cannot do a lot … but if you still have some sea ice, enough that they would be able to be there, then it is very important to know what else you can do to make sure those species can do as well as possible.”
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