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India Currents gave me a voice in days I was very lost. Having my articles selected for publishing was very validating – Shailaja Dixit, Executive Director, Narika, Fremont
Our Climate is Changing. Why Aren’t We?
What happens when ice caps melt, forests die, the permafrost thaws and microbes multiply?
Climate Reality Activists Bill DeVincenzi and Erin Zimmerman join DesiCollective to clear up some misconceptions about the pace of climate change. Scientists warn that we are in 6th extinction and that some of these changes are irreversible. Humans only have a ten year window to reverse the chain reaction of ‘feedback loops’ that are escalating the climate change crisis. The world is at a tipping point which can put us over the top to runaway climate change.
A Short Primer on Feedback Loops with Bill DeVincenzi & Erin Zimmerman
What’s A Feedback Loop?
A feedback loop is defined as a certain set of circumstances that can become self-perpetuating. They are present in everything from machines, and economics, to biological processes. They can be both positive and negative; however, in the case of climate change the consequences would be bad. Very bad.
Why Feedback Loops are Bad
Feedback loops are important to consider when trying to halt the climate crisis. And while entire books can, and have, been written about them, here’s a short primer on why climate action is essential now, and not at some point in the future.
When Earth Loses Its Best Reflector, that’s The Albedo Effect
You wouldn’t think the earth’s reflectively matters but it does. The Albedo effect, or loss of earth’s reflectivity is probably one of the most dangerous, and little known feedback loops. While much of the sunlight that hits the Earth is absorbed, some is reflected into space. You’ve probably experienced the Albedo effect if you have gone skiing or visited the high mountains in the winter. Snow and ice reflect around 85% of the sunlight that hits it and keeps the planet from getting too warm. But the volume of ice around the world has decreased by 75% in the last 40 years. According to scientists, we could lose Arctic sea ice completely by the end of this century. The ocean absorbs about 90% of the sunlight that hits it. So, we are replacing the best reflector, sea ice, with the worst absorber, open ocean. If you add in the loss of snow and ice on land as well, this adds up to approximately 40% loss of reflectivity. More heat absorbed means a warmer planet and results in even more ice melt and the cycle repeats itself.
Permafrost Melt Releases Methane – It’s Wrapping Earth in a Warm, Toxic Blanket
Thousands of years ago, an icy cover in the North froze billions of tons of biological material to create Permafrost. When permafrost melts, the biological materials thaw and then decompose, releasing the greenhouse gasses (GHGs) carbon dioxide (CO2) and Methane. GHG’s are like a blanket that covers the Earth, keeping it warm. As the blanket gets thicker (more GHG’s), the planet gets warmer. Today, permafrost keeps twice as much CO2 in the ground as there is CO2 in the atmosphere right now. If this CO2 is released, the consequences could be devastating. It’s vicious cycle. As global temperatures rise, the permafrost thaws, which increases greenhouse gasses and more warming. The cycle then repeats itself. The carbon dioxide is bad enough, but the Methane is 30 times more potent than CO2 in terms of trapping heat in the atmosphere.
The Jet Stream’s Deadly Loop De Loop
The Jet Stream ironically, is an actual loop of air current. It circles high above the earth around the Northern hemisphere between the colder north and the warmer south. The temperature differential between the two keeps the jet stream in place; however, the temperature in the North is increasing 2 to 3 times as fast as the temperature in the South. This is pushing the jet stream South; the further South it wanders, the more it picks heat from the South to carry North. This reinforces the cycle and causes wild and unpredictable changes in weather, from extreme cold spells in the South (ice storms inTexas!) to hotter days in the Arctic (or 100.4F in Siberia!). Dry areas become drier, and wet places get wetter.
Stand Up to The Folly of Fossil Fuels
As you have probably noticed, all the feedback loops start with fossil fuel emissions. If we reduce fossil fuel emissions, stop deforestation, and re-green the Earth, we can prevent or start to reverse these feedback loops.
Advocate for Climate Action or Elect Leaders Who Will
The single most important thing we can do is elect leaders who will move us in the right direction. We must vote in political leadership that will take on this problem and collaborate with other countries around the world. It is up to us to continue to put pressure on our local legislators to support the administration in the effort.
Regardless, the planet will continue to exist just fine, albeit a lot warmer, like in the time of the dinosaurs. We humans may not exist, nor would many of the species that now exist with us. So, we can sit back and let global warming wipe us out. Or we can act now to save ourselves and our fellow species. We have total control over this.
Let’s make it happen!
Meera Kymal & Anjana Nagarajan Butaney produce the climate change podcast ‘Our Climate is Changing, Why Aren’t We?’ at DesiCollective.
Photo by Hans-Jurgen Mager on Unsplash