Winter Weather Doesn’t Disprove Global Warming
Weather and climate aren't the same. It's one thing for people who spend little or no time learning about global warming to confuse the two, but when those we elect to represent us don't know the difference, we're in trouble.
For a U.S. president to tweet about what he referred to as "Global Waming" because parts of the country are experiencing severe winter conditions displays a profound ignorance that would be embarrassing for an ordinary citizen, let alone the leader of a world power.
Trump's Foolish Climate Babble Begs the Question: How Can 'Global Waming' Tweet Not Be a Troll? @ryanstruyk… https://t.co/HqeRmzXlbT— EcoWatch (@EcoWatch)1548780544.0
To understand the distinction, it's important to know the difference between "global warming" and "climate change." Although the terms are often used interchangeably, there's a subtle difference. Current global warming refers to the overall phenomenon whereby global average temperatures are steadily increasing more rapidly than can be explained by natural factors. Much of the climate change we're already seeing—from increasing extreme weather events to floods and drought to altered ocean currents—is a result of global warming.
That's leading to a range of impacts, "including rising sea levels; shrinking mountain glaciers; accelerating ice melt in Greenland, Antarctica and the Arctic; and shifts in flower/plant blooming times," according to NASA. That, in turn, affects everything from the food we grow and eat to water availability to human migration.
Both "global warming" and "climate change" refer to average long-term phenomena and effects, whereas "weather" refers to local changes in climate "on short timescales from minutes to hours to days to weeks," such as "rain, snow, clouds, winds, thunderstorms, heat waves and floods," NASA says.
So, what about those record cold temperatures in parts of the eastern U.S. and Canada? To start, global warming is global; it doesn't refer to one specific place. While parts of North America are experiencing record cold, places like Australia are seeing record-breaking heat. Globally, the past four years have been the hottest on record, and the warmest 20 have occurred over the past 22 years.
Several studies show global warming is causing an increasing number of cold-weather events in eastern North America. "Warm temperatures in the Arctic cause the jet stream to take these wild swings, and when it swings farther south, that causes cold air to reach farther south. These swings tend to hang around for awhile, so the weather we have in the eastern United States, whether it's cold or warm, tends to stay with us longer," said Jennifer Francis, research professor of marine and coastal sciences in Rutgers' School of Environmental and Biological Sciences, who co-authored one study published in Nature Communications.
This, according to National Geographic, also means "floods last longer and droughts become more persistent." The study found that "severe winter weather is two to four times more likely in the eastern United States when the Arctic is abnormally warm than when the Arctic is abnormally cold." Winters are also colder in northern Europe and Asia when the Arctic is warm. The opposite is true in western North America, where severe winter weather is more likely "when the Arctic is colder than normal." The effects are more pronounced when Arctic warming reaches beyond the surface, causing disruptions in the stratospheric polar vortex.
Warmer temperatures can also lead to increased precipitation, which falls as snow when temperatures drop below freezing. As a Scientific American article notes, warmer temperatures in winter 2006 prevented Lake Erie from freezing for the first time in history, which "led to increased snowfalls because more evaporating water from the lake was available for precipitation."
Melting ice in the Arctic, Antarctic and on glaciers exposes land or sea, creating feedback loops, as dark surfaces absorb more solar heat than ice and snow, which reflect it. This accelerates warming.
So, no, a cold day where you live isn't evidence that global warming is a "hoax." Scientists worldwide agree: As humans continue to burn fossil fuels and destroy areas that absorb carbon dioxide, like forests and wetlands, the planet's average temperature will keep rising, with undeniable consequences for human health and survival, as well as for the biodiverse life on which we rely.
A study in Science Advances predicts extreme weather events could increase by 50 percent this century if we don't bring emissions under control. It's time to take this seriously.
"Climate Change Is an Existential Crisis - It Should Be the Top Political Issue, Too." - Dr. David Suzuki… https://t.co/cqy69qSl6g— John Lundin 🌊 (@John Lundin 🌊)1547306526.0
David Suzuki is a scientist, broadcaster, author and co-founder of the David Suzuki Foundation. Written with contributions from David Suzuki Foundation senior editor Ian Hanington.
A "trash tsunami" has washed ashore on the beaches of Honduras, endangering both wildlife and the local economy.
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More long-finned pilot whales were found stranded today on beaches in Tasmania, Australia. About 500 whales have become stranded, including at least 380 that have died, the AP reported. It is the largest mass stranding in Australia's recorded history.
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By Harry Kretchmer
By 2030, almost a third of all the energy consumed in the European Union must come from renewable sources, according to binding targets agreed in 2018. Sweden is helping lead the way.
Sweden is a world leader in renewable energy consumption. Swedish Institute/World Bank
Naturally Warm<p>54% of Sweden's power comes from renewables, and is helped by its geography. With plenty of moving water and 63% forest cover, it's no surprise the <a href="https://sweden.se/nature/energy-use-in-sweden/#" target="_blank">two largest renewable power sources</a> are hydropower and biomass. And that biomass is helping support a local energy boom.</p><p>Heating is a key use of energy in a cold country like Sweden. In recent decades, as fuel oil taxes have increased, the country's power companies have turned to renewables, like biomass, to fuel local 'district heating' plants.</p><p>In Sweden these trace their <a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140#fig3" target="_blank">origins back to 1948</a>, when a power station's excess heat was first used to heat nearby buildings: steam is <a href="https://www.sciencedirect.com/topics/engineering/district-heating-system" target="_blank">forced along a network of pipes</a> to wherever it's needed. Today, there are around 500 district heating systems across the country, from major cities to small villages, providing heat to homes and businesses.</p><p>District heating used to be fueled mainly from the <a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140" target="_blank">by-products of power plants</a>, waste-to-energy plants and industrial processes. These days, however, Sweden is bringing more renewable sources into the mix. And as a result of competition, this localized form of power is now the country's<a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140#fig3" target="_blank" rel="noopener noreferrer"> home-heating market leader.</a></p>
Sweden is using smart grids to turn buildings into energy producers. Huang et al/Elsevier
Energy ‘Prosumers’<p>But Sweden doesn't stop at village-level heating solutions. Its new breed of energy-generation takes hyper-local to the next level.</p><p>One example is in the city of Ludivika where 1970s flats <a href="https://www.buildup.eu/sites/default/files/content/transforming-a-residential-building-cluster-into-electricity-prosumers-in-sweden.pdf" target="_blank">have recently been retrofitted with the latest smart energy technology</a>.</p><p>48 family apartments spread across 3 buildings have been given photovoltaic solar panels, thermal energy storage and heat pump systems. A micro energy grid connects it all, and helps charge electric cars overnight.</p><p>The result is a cluster of 'prosumer' buildings, producing rather than consuming enough power for 77% of residents' needs. With <a href="http://www.diva-portal.org/smash/get/diva2:1232060/FULLTEXT01.pdf" target="_blank" rel="noopener noreferrer">high levels of smart meter usage</a>, it's a model that looks set to spread across Sweden.</p>
<div id="d7bf9" class="rm-shortcode" data-rm-shortcode-id="8757b138d5570bec9d6aad18074a429a"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1273556364263071744" data-partner="rebelmouse"><div style="margin:1em 0">Read more about Western Harbour and book a visit: https://t.co/ujSmVs9rNK 🏡🌳🌊 https://t.co/C5PuPziqIM</div> — Smart City Sweden (@Smart City Sweden)<a href="https://twitter.com/SmartCitySweden/statuses/1273556364263071744">1592474473.0</a></blockquote></div>
Scaling Up<p>A recent development by E.ON in Hyllie, a district on the outskirts of Malmö, southern Sweden, <a href="https://www.eonenergy.com/blog/2019/February/sweden-smart-city" target="_blank">has scaled up the smart grid principle</a>. Energy generation comes from local wind, solar, biomass and waste sources.</p><p>Smart grids then balance the power, react to the weather, deploying extra power when it's colder or putting excess into battery storage when it's warm. The system is not only more efficient, but bills have fallen.</p><p>Smart energy developments like those in Hyllie, Ludivika, and renewable-driven district heating, offer a radical alternative to the centralized energy systems many countries rely on today.</p><p>The EU's leaders have a challenge: how to generate 32% of energy from renewables by 2030. Sweden offers a vision of how technology and local solutions can turn a goal into a reality.</p>
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By Jessica Corbett
In another win for climate campaigners, leaders of 12 major cities around the world — collectively home to about 36 million people — committed Tuesday to divesting from fossil fuel companies and investing in a green, just recovery from the ongoing coronavirus pandemic.
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