Antarctica Is Melting
New research published in the journal Nature warns that as
Antarctica warms, melt water from its glaciers could cause a significant
slowdown in the massive ocean currents that regulate global climate. The
research suggests that by 2050, these ocean currents could slow by up to 40%,
altering the Earth's climate in ways that are not yet fully understood, but
could include rising sea levels, droughts, and floods. The study finds that a
slowdown in ocean currents could also affect weather patterns, generate a
cascade of impacts, and cause possible starvation for marine life deprived of
vital nutrients.
The research was conducted by the Climate Change Research
Center at the University of New South Wales, and was coordinated by Professor
Matt England. The lead author of the study, Dr. Qian Li, formerly of the
University of New South Wales and now at the Massachusetts Institute of
Technology, warned that the slowdown in the deep ocean current could
"profoundly alter the ocean overturning of heat, fresh water, oxygen,
carbon and nutrients, with impacts felt throughout the global ocean for
centuries to come.”
The research highlights the urgent need for action to
address the melting of Antarctica's glaciers, which are contributing to rising
sea levels and changing ocean currents. The authors of the study warn that the
current trajectory of the deep ocean current is heading for collapse, which
could have catastrophic consequences for the Earth's climate. The melting of
Antarctica's glaciers is a pressing global issue, and requires immediate
attention and action to mitigate the impacts of climate change.
This animation shows the path of the global conveyor belt. The blue arrows indicate the path of deep, cold, dense water currents. The red arrows indicate the path of warmer, less dense surface waters. It is estimated that it can take 1,000 years for a “parcel” of water to complete the journey along the global conveyor belt. Credit: NOAA
Knock-On Effects
New research published in the journal Nature warns that as
Antarctica warms, melt water from its glaciers could slow down massive ocean
currents by up to 40% as soon as 2050. This could cause significant changes in
the Earth’s climate, including droughts, flooding, and rising sea levels. The
slowdown in ocean currents could alter the world’s climate for centuries,
leading to faster sea level rise, alterations in weather patterns, and possible
starvation for marine life. The research suggests that such a slowdown in the
deep ocean current could also have a radical shift in rainfall, affecting the
production of phytoplankton over centuries. This could ultimately affect the
marine food chain. The researchers say that the whole deep ocean current is
heading for collapse, and the slowdown in the deep ocean current would
“profoundly alter the ocean overturning of heat, fresh water, oxygen, carbon
and nutrients, with impacts felt throughout the global ocean for centuries to
come.”
The Takeaway
The Earth is facing two major problems: slowing ocean
currents and rising global temperatures. Both can have disastrous consequences
for humans, but solutions are slow to come because of pushback from fossil fuel
vendors and consumers. If we were serious about making consumers pay for the
damage done by burning fossil fuels, electricity and gas prices would
skyrocket. Unfortunately, there is little political will to reduce carbon and
methane emissions. The slowdown in ocean currents could also affect the amount
of carbon dioxide the deep oceans can store. Overall, the future looks
uncertain, and we may be leaving our grandchildren with the fallout from our
inaction.
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