Modern astronomical telescopes are extraordinarly powerful. And we keep making them more powerful. With telescopes like the Extremely Large Telescope and the Giant Magellan Telescope seeing first light in the coming years, our astronomical observing power will be greater than ever.
But a new commentary says that climate change could limit the power of our astronomical observatories.
Continue reading “Climate Change is Making the Atmosphere Worse for Astronomy”
An iceberg that calved off of from a larger ice formation has spent three years floating on the ocean near Antarctica. The iceberg broke off of the Larsen Ice Shelf in mid-July 2017. It’s been battered and split up into three pieces, but it’s still going.
Continue reading “This Giant Iceberg Has Been Sailing the Southern Seas for Three Years Now”
If—or hopefully when—we cut our Greenhouse Gas (GHG) emissions, we won’t notice much difference in the climate. The Earth’s natural systems take time to absorb carbon from the atmosphere. We may have to wait decades for the temperatures to drop.
Of course, that doesn’t mean we shouldn’t do it. It’s just that we have to temper our expectations a little.
Continue reading “Even If We Cut Greenhouse Gas Emissions Tomorrow, it Would Take Decades for the Earth to Start Cooling Again”
The Antarctic Peninsula is the northernmost part of Antarctica, and has the mildest climate on the continent. In January, the warmest part of the year, the temperature averages 1 to 2 °C (34 to 36 °F). And it’s getting warmer.
Those warm temperatures allow snow algae to grow, and now scientists have used remote sensing to map those algae blooms.
Continue reading “The Coast of Antarctica is Starting to Turn Green”
NASA and the NOAA just announced that 2019 was the second hottest year on record. It barely edged out 2016, the previous warmest year. And both 2019 and 2016 are part of the global warming trend: the last five years have been the warmest five years on record. And the last decade was the warmest decade.
Continue reading “According to NASA, 2019 Was the Second Hottest Year on Record”
One of the clearest signs of global warming, unless you live next to a glacier, are rising oceans. Now a joint mission involving the US and European countries is launching a pair of satellites to monitor the rising sea levels. The two satellites will monitor the oceans until 2030.
Continue reading “New Satellites Will Tell Us Exactly how Quickly the Oceans are Rising”
There is no doubt that climate change is a very serious (and worsening) problem. According to a recent report by the Intergovernmental Panel on Climate Change (IPCC), even if all the industrialized nations of the world became carbon neutral overnight, the problem would continue to get worse. In short, it’s not enough to stop pumping megatons of CO2 into the atmosphere; we also have to start removing what we’ve already put there.
This is where the technique known as carbon capture (or carbon removal) comes into play. Taking their cue from nature, an international team of researchers from the University of Waterloo, Ontario, have created an “artificial leaf” that mimics the carbon-scrubbing abilities of the real thing. But rather than turning atmospheric CO2 into a source of fuel for itself, the leaf converts it into a useful alternative fuel.
Continue reading “This Artificial Leaf Turns Atmospheric Carbon Dioxide Into Fuel”
Fraser Cain (universetoday.com / @fcain)
Allen Versfeld (https://www.urban-astronomer.com/ / @uastronomer)
Dr. Morgan Rehnberg (MorganRehnberg.com / @MorganRehnberg & ChartYourWorld.org)
Moiya McTier (https://www.moiyamctier.com/ / @GoAstroMo)
Jeff Kargel is a Senior Scientist at the Planetary Science Institute in Tucson, Arizona. He is a geologist, a glaciologist, and a planetary scientist. Climate change is a major thread, and that is what he is here today to talk about.
Continue reading “Weekly Space Hangout: October 16, 2019 – Jeffrey Kargel Talks Climate Change on Earth and Beyond”
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As global warming ramps up, expect to see Greenland in the news a lot. That’s because its ice sheet is under threat of melting. But that’s not the only reason. The other reason is fire.
Continue reading “There’s A Fire in Greenland… Again. It’s 10 Degrees Hotter Than Normal”