www.popsci.com

Here’s why NASA is working on a concept crewed mission to Venus

Here's a climate story that speaks to the 14-year-old science geek in all of us.


Start with some basics:

The Venusian atmosphere is comprised of 97 percent carbon dioxide, about 3 percent nitrogen and trace amounts of other gases.... The current climatic conditions and composition of the atmosphere are the result of a runaway greenhouse effect, (an extreme greenhouse effect that cannot be reversed) which transformed the planet from a hospitable Earth-like "twin" world in its early history.

That creates enough of an insulating blanket to drive the planet's surface temperature to 870ºF (460ºC), enough to melt metals like lead and bismuth—and which, the article notes, may fall as "snow" on Venus' higher mountain peaks.

By contrast, Earth's CO2 percentage is 0.04 percent (or 400 parts per million), and scientists fear a rise to 0.06 could render vast swathes of our planet uninhabitable or unsuitable for agriculture.

NASA, according to this fascinating story in Popular Science, is sketching ways to send manned airships to Venus' atmosphere to further our understanding of the evolution of our solar systems (and others!) and test the extremes of our climate models.

As surprising as it may seem, the upper atmosphere of Venus is the most Earth-like location in the solar system. Between altitudes of 50km and 60km, the pressure and temperature can be compared to regions of the Earth's lower atmosphere. The atmospheric pressure in the Venusian atmosphere at 55km is about half that of the pressure at sea level on Earth. In fact, you would be fine without a pressure suit, as this is roughly equivalent to the air pressure you would encounter at the summit of Mount Kilimanjaro.

Scientists have theorized that Venus and Earth were twins in their early history, formed of the same ingredients and each with oceans of water. But Venus gets far more sunlight, and NASA suspects Venus' oceans evaporated. Radiation broke apart the water vapor molecules: Hydrogen escaped to space, and CO2 accumulated.

Scientists see no chance that our human activities can trigger such a one-way ticket to warming. But it sure would be cool to be on a platform of an airship high above Venus, wearing little more than an air supply and a chemical haz-mat suit.

Read the full story on Popular Science.

Climate change will continue to widen gaps in food security, new study finds

Countries already struggling with low crop yields will be hurt most by a warming climate.

With storms to the east and wildfires to the west, the climate crisis is currently at the forefront of public consciousness.

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www.theguardian.com

Brazil's Amazon rainforest suffers worst fires in a decade

Fires in Brazil's Amazon increased 13% in the first nine months of the year compared with a year ago, as the rainforest region experiences its worst rash of blazes in a decade, data from space research agency Inpe has shown.

insideclimatenews.org

At one of America’s most toxic Superfund sites, climate change imperils more than cleanup

For many residents of Newark, its concentration of Superfund sites underscores two New Jerseys: one of tree-shaded suburbs where wealth and political leverage guard communities from outside corporate interests and rampant pollution, and the other, of lower-income and predominantly Black and brown residents who have endured decades of discriminatory housing policies only to find their communities squeezed by heavy industry and used as dumping grounds for hazardous waste.

therevelator.org

As glaciers melt, will deadly landslides increase?

A recent string of massive landslides in Alaska and around the world bears the fingerprint of climate change.
insideclimatenews.org

Net zero by 2050 has quickly become the new normal for the largest U.S. utilities

New plans from Ameren and Entergy show the trend to renewables is accelerating because coal just can’t compete. Some activists want it to go even faster.
Photo by Ani Kolleshi on Unsplash

NHS targets net zero emissions by 2040

Britain's National Health Service pledged on Thursday to become the world's first healthcare system to cut carbon emissions to net zero, hoping to achieve that by 2040 with measures from electric ambulances to energy-efficient hospitals.
www.nature.com

What a Joe Biden presidency would mean for five key science issues

The coronavirus pandemic, climate change and space exploration are among the issues that Biden will influence if he wins the upcoming US election.