The natural disasters
of 2017 have raised a lot of questions about human involvement and the dire
consequences of climate change caused by human activity on our planet. Even
though its effects have made themselves apparent, there are many who don’t
believe climate change is real, or at least that humans have nothing to do with
it.
Earlier this
year, NASA released a series of images titled Images of Change to show just how
drastic an effect human activity has had on Earth in the last fifty or so
years. They tell a story of melting glaciers, receding ice shelves, floods, and
other natural disasters. They all provide evidence that climate change is very
real and happening right now. It is time to take the hard, photographic
evidence seriously. and learn from our past mistakes.
Tuvalu and
the Rising Sea Levels
Image
Credit: Ashley Cooper/Contributor/Getty Images
This image
was taken in 2007, showing a town submerged in water on the Funafuti Atoll. Its
population of more than 6,000 people has been battling with the direct
consequences of rising sea levels. Residents of the capital Tuvalu have seen
very frequent flooding in populated areas due to the fact that it is at most
4.57 meters (15 feet) above sea level. Dubbed one of “the most vulnerable
Pacific Ocean islands,” its residents have to make the ultimate choice: leave
the islands or deal with the consequences.
The Larsen C
Ice Shelf
Image
Credit: NASA/John Sonntag
This
112.65km (70 mile) long, 91.44 meter (300 feet) wide crack in the Antarctic
Peninsula’s Larsen C ice shelf was photographed in November 2016. As a direct
result of the split, a piece of an ice shelf the size of Delaware collapsed.
The more than 1 trillion ton ice slab broke away from the Larsen C shelf around
the 10th of July, 2017, decreasing it by more than 12%.
Rising
Bedrock in Greenland
Image
Credit: ESA/Sentinel-2/Copernicus Sentinel
Environmental
scientists have concluded in recent studies that the Greenland Ice Sheet is
rising as ice melts; as the ice that sits on top of the outer crust of the
Earth melts, the crust underneath rises up. Measuring this change is giving
scientists valuable insight into the changing sizes of ice sheets and how this
eventually leads to rising sea levels.
Hurricane Harvey
Image
Credit: @Space_Station/Twitter
This image
was taken from the International Space Station on August 25, 2017. The
disastrous consequences of Hurricane Harvey wreaking havoc on central Texas saw
a huge amount of media coverage. However, when it came to drawing links between
the storm and climate change, the reporting was far more subdued. Kevin
Trenberth, a senior scientist from the U.S. National Center for Atmospheric
Research, said in an interview with The Atlantic: “the human contribution can
be up to 30 percent or so of the total rainfall coming out of the storm.” But
the trend of tying storms of this scale to human activity is still emerging.
Flooding of
the Ganges River
Image
Credit: NASA
These
satellite images are part of an ongoing series of images called Images of
Change released by NASA in 2017. In addition to images related to climate
change, the series also looks at how urbanization and natural hazards are
changing our planet. The two images above show the drastic effect the 2015
flood had on the Ganges River in eastern and central India. Over six million
people were affected by it, and at least 300 people lost their lives.
Arctic Sea
Ice Decline
Image
Credit: NASA
The last
three decades have not been kind to the thick, older layers of sea ice in the
Arctic. A study published by the American Geophysical Union in 2007 already
noted a sharp decline of the Arctic Sea ice between 1953 and 2006. The last
couple of winters have shown record lows in the amount of wintertime Arctic Sea
ice.
“This older,
thicker ice is like the bulwark of sea ice: a warm summer will melt all the
young, thin ice away but it can’t completely get rid of the older ice. But this
older ice is becoming weaker because there’s less of it and the remaining old
ice is more broken up and thinner, so that bulwark is not as good as it used to
be,” says Walt Meiter, a sea researcher from the NASA Goddard Space Flight
Center.
Increase of
Sun’s Energy Absorbed in the Arctic
Image
Credit: NASA
Since 2000,
NASA has been using its satellites to measure the solar radiation absorbed in
the Arctic. Since records began in 2000, the rate has increased by 5% —
notably, the only region on our planet to see a change. Due to this increase,
the ice melts sooner in the spring, and more older, thicker sea ice is lost
permanently.
Glacier Melt
in Alaska
Image
Credits: U.S. Geological Survey/NASA
The
Northwestern Glacier in Alaska retreated an estimated 10 kilometers (6 miles)
out of view. The small icebergs that can be seen in the foreground have
retreated almost entirely throughout the decades.
Air
Pollution in London
Image
Credit: Barry Lewis/Getty Images
Commuters
can be seen crossing the London Bridge on March 15, 2012 — a day with
record-breaking levels of air pollution due to dirty air from the north,
traffic fumes, and a lack of moving air. According to the World Health
Organization, “92% of the world population was living in places where the WHO
air quality guidelines levels were not met,” and three million premature deaths
were caused by ambient air pollution worldwide in 2012.
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