Earth Changes
Polar stratospheric clouds, also known as nacreous clouds (or mother of pearl, due to its iridescence), are clouds in the winter polar stratosphere at altitudes of 15,000-25,000 meters (49,000-82,000 ft). Usually the clouds only form over the poles during winter because the air in the upper stratosphere needs to be at least -78C.
These images were posted on Red Climática Mundial (Global Climate Network).
Researchers from Aarhus University in Denmark used a decade-long survey of the Young Sound fjord in Greenland to reach their conclusions. Throughout the course of the survey, measurements were taken of the salinity levels and temperatures in the fjord, where the water at depths of between 650 and 1,100 feet has been gradually warming.
They found that a significant amount of this heat comes from the interior of the Earth. According to their estimates, 100 megawatts of energy per square meter were transferred from the interior of the Earth to the fjord, and it's believed that similar heat amounts were transferred to the undersides of surrounding glaciers. This is roughly equivalent to a wind turbine of 2 megawatts sending electricity to a gigantic heater in the bottom of the fjord throughout the year. Their findings were published in the journal Scientific Reports.
Back then, the lake's swampy complexion was less than inviting to swimmers and kayakers, but it supported a robust fishing industry as several commercial companies trawled for perch, and sport fishermen cast their lines for trout. But in the past 20 years, Lake Michigan has undergone a dramatic transformation.
In analyzing satellite images between 1998 and 2012, researchers at the Michigan Tech Research Institute were surprised to find that lakes Michigan and Huron are now clearer than Lake Superior. In a study published late last year, the researchers say limiting the amount of agricultural and sewage runoff in the lake has had an immense impact. However, the emergence of invasive mussels, which number in the trillions and have the ability to filter the entire volume of Lake Michigan in four to six days, has had an even greater effect.
"When you look at the scientific terms, we are approaching some oceanic values," said Michael Sayers, a research engineer at Michigan Tech and co-author of the study. "We have some ways to go, but we are getting a lot closer to Lake Tahoe. A lot of times, you'll hear from people that the water is so blue it compares to something in tropical areas."
Imam Khomeini Airport's runway has been closed due to heavy snowfall and attempts are made to clear the runway at Mehrabad Airport in central Tehran.
Since mid-January until now, some Iranian cities have witnessed rainfall and snowfall despite the fact that the country as a whole is facing lack of rainfall and precipitation since the start of the raining season compared to last year.
It isn't all sunshine and sand in the Middle East, especially in northern Saudi Arabia which has been on the receiving end of a wintry blast this weekend.
The wintry weather arrived in the kingdom on Friday, bringing a covering of snow to the Tabuk region.
Residents were quick to share their pictures of the wintry scenes on social media.
"When ER24 paramedics arrived on the scene at 4.35pm, they found the woman lying on the ground covered with a blanket. The police were already in attendance," ER24 spokesperson Ineke van Huyssteen said.
"Upon further assessment, paramedics found that the woman had sustained extensive burn wounds to the front part of her body. Unfortunately, the woman showed no signs of life and she was declared dead on the scene by ER24."
Source: African News Agency
The sinkhole, which measures five metres across, was found in a muddy field in Ypres, where three of the bloodiest battles of WWI were fought in 1914,1915 and 1917.
According to the filmer, networks of hidden tunnels and trenches still exist in this area and may have caused the ground to give way here, creating the sinkhole.
The Saone and Rhone rivers meet in the city, and have broken their banks in the past, most recently in 2003 when the road by the Saone was cut and homes flooded just north of the city.
"I spent all my childhood on the riverside and I rarely saw floods like this, it's pretty impressive," said one man.
"For the Saone, it's been years since we saw it in flood. In general, every winter it is in flood, but the situation is exceptional this year for the Rhône because it is not often that it is in flood. The meeting of the two rivers - confluence - is catastrophic," said one woman.
The lower levels of public car parks closest to the river banks were evacuated and closed, exacerbating the already difficult parking in the city.
Some private garages were preparing to pump out water if needed.
"The car parks are completely flooded and you feel the lack of spaces in the city center," said one frustrated motorist.
Comment: Meanwhile hundreds of people have been evacuated, tunnels and roads have been sealed off and the bottom floor of the Louvre has closed as Paris braces for more floods. The River Seine burst its banks on Tuesday and reached 5.6m (18ft) high on Friday morning at the Austerlitz bridge in eastern Paris following days of heavy rain.
Meteo France said the rainfall was double the average for this time of year. There are predictions of 6m (20ft) for the weekend - just below the 6.2m it reached two years ago, which led to two people dying and several being injured amid a state of emergency.
See also: Paris flooding to get worse as Seine expected to rise despite break from "double the normal rainfall" (VIDEO)
Extreme weather disrupts flights and train services, with several road accidents during rush hour
Shanghai residents are revelling in rare snow, but the extreme weather has disrupted flights and trains in the region and the city also saw a series of traffic accidents during rush hour on Friday.
Many people braved the cold to enjoy the novelty of snow blanketing downtown Shanghai, which has not seen significant snowfall for a decade. In the city's central area, the snow was 4cm deep, while in the suburbs it was 5cm to 10cm.
Zhao Fang, an office manager and mother of a preschooler, said she took the day off work and gave her son the day off school on Friday to fully enjoy the snow.
"We don't want to miss this rare opportunity to play in the snow," she said. "Who knows how many more years it will be before snow will fall again in Shanghai."
Photos shared online by thrilled residents showed people frolicking in the snow, leaving messages on snow-covered cars, making snow angels and building snowmen.
But dozens of parks were closed for safety reasons until the snow was cleared, local news website Xinmin.cn reported.
















Comment: Strong seismic activity across the planet in the first month of 2018 is showing a marked increase, listed below are all the earthquakes of magnitude 6 or greater (a total of 9 with the report above):
Shallow 6.0 magnitude earthquake in Myanmar (Burma)
Shallow 7.1 magnitude earthquake strikes southern Peru, leaves 1 dead and 20 injured
Magnitude 6.3 earthquake strikes Mexico
Magnitude 6.3 earthquake jolts northern Chile
Powerful 6.0 magnitude earthquake hits off coast of Java, Indonesia
Tsunami warning for US and Canadian Pacific coast after 8.2 magnitude earthquake strikes in Gulf of Alaska - UPDATE
6.4 magnitude earthquake hits off of Japan
Shallow magnitude 6.4 earthquake strikes off Russia's east coast