Enlarge / Climate scientist Michael Mann. (credit: Slaven Vlasic )

This is a story I had sporadically wondered whether I'd ever have the chance to write. Over a decade ago, I covered a lawsuit filed by climate scientist Michael Mann, who finally had enough of being dragged through the mud online. When two authors accused him of fraud and compared his academic position to that of a convicted child molester, he sued for defamation.

Mann was considered a public figure, which makes winning defamation cases extremely challenging. But his case was based on the fact that multiple institutions on two different continents had scrutinized his work and found no hint of scientific malpractice—thus, he argued, that anyone who accused him of fraud was acting with reckless disregard for the truth.

Over the ensuing decade, the case was narrowed, decisions were appealed, and long periods went by without any apparent movement. But recently, amazingly, the case finally went to trial, and a jury rendered a verdict yesterday: Mann is entitled to damages from the writers. Even if you don't care about the case, it's worth reflecting on how much has changed since it was first filed.

Enlarge / NASA's PACE spacecraft last year at Goddard Space Flight Center, Maryland. (credit: NASA )

NASA's latest mission dedicated to observing Earth's oceans and atmosphere from space rocketed into orbit from Florida early Thursday on a SpaceX launch vehicle.

This mission will study phytoplankton, microscopic plants fundamental to the marine food chain, and tiny particles called aerosols that play a key role in cloud formation. These two constituents in the ocean and the atmosphere are important to scientists' understanding of climate change. The mission's acronym, PACE, stands for Plankton, Aerosol, Cloud, ocean Ecosystem.

Nestled in the nose cone of a Falcon 9 rocket, the PACE satellite took off from Cape Canaveral Space Force Station, Florida, at 1:33 am EST (06:33 UTC) Thursday after a two-day delay caused by poor weather.

Some of the microbes that make carbon sequestration work. (credit: Andes Ag, Inc)

In 2022, humans emitted a staggering 36 gigatons of carbon dioxide into the atmosphere. Along with reducing emissions, removing carbon dioxide from the atmosphere is a key climate mitigation strategy. But Gonzalo Fuenzalida wasn’t looking to help solve climate change when he co-founded the company Andes .

“We started this company with the idea of using microbes to make the process of growing food more resilient,” says Fuenzalida. “We stumbled upon these microbes that have the ability to create minerals in the soil which contain carbon and that intrigued us.”

Fuenzalida, alongside his co-founder Tania Timmermann-Aranis, had an unconventional notion: They could harness the power of microbes residing in plant roots within the soil to remove carbon from the atmosphere. These naturally occurring microbes can be applied to the soil by blending them with pesticides or other soil treatments—they will strategically position themselves within the root structure of corn, wheat, and soy plants.

Enlarge / Aerial view of the Athabasca oil sands near Fort McMurray, Alberta, Canada. (credit: Bloomberg Creative via Getty )

Canada’s tar sands have gained infamy for being one of the world’s most polluting sources of oil, thanks to the large amounts of energy and water use required for their extraction. A new study says the operations are also emitting far higher levels of a range of air pollutants than previously known, with implications for communities living nearby and far downwind.

The research, published Thursday in Science , took direct measurements of organic carbon emissions from aircraft flying above the tar sands, also called oil sands, and found levels that were 20 to 64 times higher than what companies were reporting. Total organic carbon includes a wide range of compounds, some of which can contribute directly to hazardous air pollution locally and others that can react in the atmosphere to form small particulate matter, or PM 2.5, a dangerous pollutant that can travel long distances and lodge deep in the lungs.

The study found that tar sands operations were releasing as much of these pollutants as all other human-made sources in Canada combined. For certain classes of heavy organic compounds, which are more likely to form particulates downwind, the concentrations were higher than what’s generally found in large metropolises like Los Angeles.

Enlarge / Warming in 2023 was widespread. (credit: NOAA NCEI )

Earlier this week, the EU's Earth science team came out with its analysis of 2023's global temperatures , finding it was the warmest year on record to date. In an era of global warming, that's not especially surprising. What was unusual was the way 2023 set its record—every month from June on coming in far above any equivalent month in the past—and the size of the gap between 2023 and any previous year on record.

The Copernicus dataset used for that analysis isn't the only one of the sort, and on Friday, Berkeley Earth , NASA , and NOAA all released equivalent reports. And all of them largely agree with the EU's: 2023 was a record, and an unusual one at that. So unusual that NASA's chief climate scientist, Gavin Schmidt, introduced his look at 2023 by saying, "We're frankly astonished."

Despite the overlaps with the earlier analysis, each of the three new ones add some details that flesh out what made last year so unusual.

Enlarge / Month by month, 2023 stood far above the rest. (credit: C3S/ECMWF )

The confused wiggles on the graph above have a simple message: Most years, even years with record-high temperatures, have some months that aren't especially unusual. Month to month, temperatures dip and rise, with the record years mostly being a matter of having fewer, shallower dips.

As the graph shows, last year was not at all like that. The first few months of the year were unusually warm. And then, starting in June, temperatures rose to record heights and simply stayed there. Every month after June set a new record for high temperatures for that month. So it's not surprising that 2023 will enter the record books as far and away the warmest year on record.

The EU makes it official

Several different organizations maintain global temperature records; while they use slightly different methods, they tend to produce very similar numbers. So, over the next few weeks, you can expect each of these organizations to announce record temperatures (NASA and the National Oceanic and Atmospheric Administration will do so on Friday). On Tuesday, it was the European Union's turn , via its Copernicus Earth-observation program.

Enlarge / Where beavers set up home, the dams they build profoundly change the landscape. (credit: Troy Harrison )

For the first time in four centuries, it’s good to be a beaver. Long persecuted for their pelts and reviled as pests, the dam-building rodents are today hailed by scientists as ecological saviors. Their ponds and wetlands store water in the face of drought, filter out pollutants, furnish habitat for endangered species, and fight wildfires. In California, Castor canadensis is so prized that the state recently committed millions to its restoration.

While beavers’ benefits are indisputable, however, our knowledge remains riddled with gaps. We don’t know how many are out there, or which direction their populations are trending, or which watersheds most desperately need a beaver infusion. Few states have systematically surveyed them; moreover, many beaver ponds are tucked into remote streams far from human settlements, where they’re near-impossible to count. “There’s so much we don’t understand about beavers, in part because we don’t have a baseline of where they are,” says Emily Fairfax, a beaver researcher at the University of Minnesota.

Enlarge / African penguins on a beach near Simon's Town in South Africa. (credit: spooh )

CAPE TOWN, South Africa—A weathered, green building stands at the edge of the cozy suburban Table View neighborhood in Cape Town, just a few blocks down from a Burger King and a community library. Upon stepping inside, visitors’ feet squelch on a mat submerged in antibacterial liquid—one of the first signs this isn’t just another shop on the street.

A few steps further down the main hallway, a cacophony of discordant brays and honks fill the air. A couple more strides reveal the source of these guttarall calls: African penguins.

Welcome to the nonprofit Southern African Foundation for the Conservation Of Coastal Birds’ hatchery and nursery, where hundreds of these birds are hand-reared after being injured or abandoned in the wild.

Enlarge (credit: d3sign )

When you drop money in the bank, it looks like it’s just sitting there, ready for you to withdraw. In reality, your institution makes money on your money by lending it elsewhere, including to the fossil fuel companies driving climate change, as well as emissions-heavy industries like manufacturing.

So just by leaving money in a bank account, you’re unwittingly contributing to worsening catastrophes around the world. According to a new analysis , for every $1,000 dollars the average American keeps in savings, each year they indirectly create emissions equivalent to flying from New York to Seattle. “We don’t really take a look at how the banks are using the money we keep in our checking account on a daily basis, where that money is really circulating,” says Jonathan Foley, executive director of Project Drawdown, which published the analysis. “But when we look under the hood, we see that there's a lot of fossil fuels.”