Recently, Intergovernmental Panel on Climate Change (IPCC) released a new report, which outlines the impacts and costs of 2.7 degrees Fahrenheit (1.5 degrees Celsius) of global warming. The panel studied over 6,000 scientific reports, and concluded that… it’s getting far worse than we thought.
“But seriously,” you might be thinking, “how can just a few degrees make such a difference? I mean, we experience diurnal temperature swings far greater than that every single day, right? What’s so wrong with a few extra days of summer anyway?”
A few degrees might seem inconsequential, but I’m here to explain how this affects us. Not hypothetically, but historically.
What does this mean?
Weather events occur because of differences in temperature. Hot air rises, and colder air rushes in to fill its place, until it heats up and moves up as well. This is why we have wind, and is the foundation for all weather patterns. When we have warmer air, it tends to be more unstable, and more likely to erupt into storms, just like what you’ve seen on a hot, muggy summer afternoon. With warmer air, comes more storms, more high winds, more damaging hail, more downpours, and more devastating floods.
(Learn more about other effects from a warmer climate in future posts from this Earth 101 series)
Image: Ocean temperature variation from average
When it comes to storms over water, we get a double whammy. As ocean temperatures rise, they feed the unpredictability and intensity of tropical depressions and can turn a Category 2 hurricane into a Cat. 4 in a matter of hours. Just ask the Mexico Beach, Florida.
As the Union of Concerned Scientists reiterates, the facts about the earth’s previous temperature rise are indisputable:
“Over the past 130 years, the global average temperature has increased 1.5 degrees Fahrenheit, with more than half of that increase occurring over only the past 35 years. The pattern is unmistakable: Every one of the past 40 years has been warmer than the 20th century average. 2016 was the hottest year on record. The 12 warmest years on record have all occurred since 1998.”
So, the temperature rise is happening, but why is it really making a noticeable difference?
According to data provided by the U.S.’s National Oceanic and Atmospheric Administration (NOAA), we now have 400% more extreme weather events causing at least $1 billion in economic losses, compared to the 1980s. Some of that increase is due to greater density of buildings along coastlines, but most is due to increasing frequency and intensity of extreme weather events. In 2017, the United States experienced the most rainfall EVER received from a single tropical storm, leaving Houston drowning.
When you look at all natural disasters in the U.S. between 1980-2016, tropical cyclones and flooding represent single biggest financial losses, totaling $580.7 billion, CPI-adjusted. They are are responsible for the highest number of deaths (3,210), followed by drought/heatwave events (2,993) and severe storms (1,578).
It’s bigger than it looks.
Extreme weather events may be isolated geographically, but in today’s global economy the impacts send ripples worldwide. When just one hurricane hits, it not only devastates families who lost their homes, it also means businesses are shut down, jobs are lost, people with jobs have nowhere to live or no way to get to work. When those jobs are in manufacturing, this means that a critical supplier in Georgia may cause months of delay to a manufacturer in Detroit. So, emergency measures are taken, it costs significantly more money to source alternate suppliers and expedite shipping. All the sudden, that hurricane 300 miles away from you means that your next purchase may actually cost you more out of your wallet.
Beyond the human impacts, there are so many more effects from global warming.
For all the beautiful and mysterious life brimming beneath the ocean’s surface, life is literally dying because of a few degrees. We’ve lost more coral reefs than you can imagine, with even the Great Barrier Reef being declared ‘dead.’ This is due to warming ocean temps, and more CO2 absorbed by the ocean, making it more acidic. Despite a history spanning over 6,000 years old, the delicate ecosystem cannot evolve fast enough to keep up with our current pace of change. We’ve already witnessed this permanent destruction:
- Coral reefs bleached
- Infectious diseases spread
- Acidity weakens the coral’s structure
- Fish are suffocating from algae blooms caused by floodwater
- Plants are dying from sunlight being blocked out by sediment from heavy rains
By the way, all of the damage to coral reefs has already come back to bite humans. We rely on healthy oceans for tourism, fishing, and seafood industries, which have all suffered losses due to the ocean’s decline over the past 40 years.
Here’s the deal. We need to quit squabbling over the cause of climate change, and start adapting to our new reality.
We are beyond the point of preventing climate change. We are already in the middle of something massive, and we’ve already made history. But, we do have the power to prevent more extreme devastation. We can slow down global warming by cutting our emissions of CO2 and other greenhouse gases. We can plan for more extreme weather events. We can build safer, super-insulated buildings that can withstand hurricanes and epic temperature extremes. We can prepare our cities for 100 year floods. We can manage forests and limit development where wildfire risks are highest. We can continue to develop new, zero-emission technologies. We can invest in more carbon sinks, and preserve the ones Mother Nature provided us.
You can make choices every day to lower your carbon footprint. We all can do more. However, in order to reverse course, we must have leadership that recognizes the incredible health and safety risk that we are currently facing. Even if you don’t believe the scientists who spend their entire careers studying climate, you cannot deny the unusual increase in extreme weather events that we are now seeing year after year.
The facts are clear, despite the uneducated, unscientific opinions you may hear. ‘The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive.” tweeted by Donald Trump on November 6, 2012.