Climate Archives

April 14, 2020April 14, 2020 by Evan Gough

During Mass Extinction Events, Volcanoes Were Releasing About the Same Amount of CO2 as We Are Today

The Mount Redoubt volcano in Alaska. Image Credit: By R. Clucas - http://pubs.usgs.gov/dds/dds-39/album.html and http://gallery.usgs.gov/photos/03_29_2013_otk7Nay4LH_03_29_2013_5#.UrvS2vfTnrc, Public Domain, https://commons.wikimedia.org/w/index.php?curid=5768911

200 million years ago, a mass extinction event wiped out about 76% of all species on Earth—both terrestrial and marine. That event was called the end-Triassic extinction, or the Jurassic-Triassic (J-T) extinction event. At that time, the world experienced many of the same things as Earth is facing now, including a warming climate and the acidification of the oceans.

A new paper shows that pulses of volcanic eruptions were responsible, and that those pulses released the same amount of CO₂ as humans are releasing today.

March 14, 2020March 14, 2020 by Matt Williams

As Temperatures Increase, Forests are Having More Trouble Soaking up Carbon

Envisat image, acquired on 14 January 2009, features the Congo River Basin’s rainforests. Credit: ESA

On Earth, one of the most important factors regulating our climate is the carbon cycle. This refers to the processes by which carbon compounds are sequestered by biological (photosynthesis) and geological processes and released through volcanic activity and organic processes (decay and respiration). For billions of years, this cycle has kept temperatures relatively stable on Earth and allowed for life to flourish.

For the past few centuries, human activity has tipped the scales to the point that some refer to the current geological epoch as the Anthropocene. According to a new study by an international team of researchers, human activity is also leading to a situation where tropical rainforests (a major sequester of carbon dioxide) are not only losing their ability to soak up carbon but could actually be adding to the problem in the coming years.

March 14, 2020March 16, 2020 by Evan Gough

Greenland and Antarctica are Losing Their Ice 6 Times Faster than in the 1990s

Floating ice at the calving front of Greenland's Kangerdlugssuaq glacier, photographed in 2011 during Operation IceBridge (Credit: NASA/Michael Studinger)

Is anybody listening?

January 20, 2020January 20, 2020 by Evan Gough

According to NASA, 2019 Was the Second Hottest Year on Record

According to NASA and the NOAA, 2019 was the second hottest year on record. Image Credit: NASA/GISS

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.

November 27, 2019November 27, 2019 by Evan Gough

When Martian Storms Really Get Going, they Create Towers of Dust 80 Kilometers High

The yellow-white cloud in the bottom-center of this image is a Mars "dust tower" - a concentrated cloud of dust that can be lofted dozens of miles above the surface. The blue-white plumes are water vapor clouds. This image was taken on Nov. 30, 2010, by NASA's Mars Reconnaissance Orbiter. Credit: NASA/JPL-Caltech/MSSS

When a huge dust storm on Mars—like the one in 2018—reaches its full power, it can turn into a globe-bestriding colossus. This happens regularly on Mars, and these storms usually start out as a series of smaller, runaway storms. NASA scientists say that these storms can spawn massive towers of Martian dust that reach 80 km high.

And that phenomenon might help explain how Mars lost its water.

November 27, 2019November 27, 2019 by Evan Gough

NASA Supercomputer Simulates the Weather on Mars

A screenshot of a NASA simulation of Martian water-ice clouds. Image Credit: NASA/Ames Research Center/D. Ellsworth

The Martian atmosphere is a lot different than Earth’s. It’s over 95% carbon dioxide, and contains only trace amounts of oxygen and water vapor. But that trace amount of water vapor still plays a pronounced role in the climate.

November 22, 2019November 22, 2019 by Evan Gough

New Satellites Will Tell Us Exactly how Quickly the Oceans are Rising

One week's worth of data from NASA's Earth observing satellites show the rising sea level on Earth between Oct. 29 and Nov. 7, 2019. Areas in red show higher levels, while blue show the lowest. The joint U.S.-European Sentinel-6/Jason-CS mission will continue efforts to track sea level rise. Image Credit: NASA/JPL-Caltech

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.

November 7, 2019November 8, 2019 by Matt Williams

This Artificial Leaf Turns Atmospheric Carbon Dioxide Into Fuel

Beads of rainwater on a poplar leaf act like lenses, focusing light and enlarging the leaf's network of veins. Credit: Bob King

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.

August 3, 2019August 3, 2019 by Evan Gough

Snowball Exoplanets Might Be Better for Life Than We Thought

This artist's illustration shows what an icy exo-Earth might look like. A new study says liquid water could persist under ice sheets on planets outside of their habitable zones. Image Credit: NASA

When astronomers discover a new exoplanet, one of the first considerations is if the planet is in the habitable zone, or outside of it. That label largely depends on whether or not the temperature of the planet allows liquid water. But of course it’s not that simple. A new study suggests that frozen, icy worlds with completely frozen oceans could actually have livable land areas that remain habitable.

The new study was published in the AGU’s Journal of Geophysical Research: Planets. It focuses on how CO2 cycles through a planet and how it affects the planet’s temperature. The title is “Habitable Snowballs: Temperate Land Conditions, Liquid Water, and Implications for CO₂ Weathering.”

July 15, 2019July 15, 2019 by Evan Gough

There’s A Fire in Greenland… Again. It’s 10 Degrees Hotter Than Normal

This fire in Greenland is near Sisimiut, in Western Greenland. It was likely caused by a hiker. Image Credit: NASA Earth Observatory

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.