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Chinese scientists urged the world to establish a comprehensive carbon accounting system that includes natural processes, especially extreme forest fires, as international delegates are gathering in Dubai to find a deal that will make a real difference in tackling the planet's climate issues at the 28th Conference of the Parties to the UN Framework Convention on Climate Change (COP28), according to the Shenyang-based Institute of Applied Ecology (IAE), Chinese Academy of Sciences (CAS), on Thursday at a press conference on a blue paper on the carbon emissions of forest fires.

Led by the Institute of Applied Ecology, and jointly compiled by the Institute of Earth Environment and the Institute of Atmospheric Physics of the CAS, the document points out that, from 2001 to 2022, the annual average area of forest burned globally was 46.95 million hectares, which is 11 times the annual average increase in artificial forest area during the same period.

During this period, the total carbon dioxide emissions from global forest fires reached 33.9 billion tons, which could increase atmospheric carbon dioxide concentration by 4.35 ppm (parts per million), the blue paper said.

Forest fires are a common disturbance in forest ecosystems, significantly affecting the composition, structure and succession characteristics of forests, thereby altering the material cycling and energy flow of forest ecosystems, said Xu Wenru, a researcher at the IAE and one of the lead authors of the blue paper.

Extreme forest fires have become more frequent in recent years, mainly due to climate change and human activities, leading to an increase in global carbon emissions, according to the blue paper.

"Our study has proven that the amount of emissions from forest fires is huge, so we think it is necessary to include forest fire carbon emissions into a carbon emission accounting system. On the other hand, once established, such a comprehensive accounting system will help urge related governments enhance prevention and management of extreme forest fires," Zhu Jiaojun, director of IAE, told the Global Times.

In terms of the impact of climate change and human activities on extreme forest fires, Zhu noted that these three elements are connected. He called for further scientific research and more international cooperation on fire carbon emissions.

Taking the extreme forest fires in Canada in 2023 as an example, the blue paper points out that direct carbon dioxide emissions from this fire exceeded 1.5 billion tons, higher than the total carbon dioxide emissions from forest fires in Canada over the past 22 years (1.374 billion tons). "This severely weakened the carbon sink function of forest ecosystems," Xu noted.

According to the blue paper, from May to August, the forest fires in Canada emitted a total of 10.02 million tons of PM2.5, causing environmental pollution not only in Canada but also significantly affecting air quality in large areas of the Northern Hemisphere.

The blue paper also presented significant spatial differences in global forest fire carbon dioxide emissions, with the carbon emissions from high-latitude coniferous forest areas in the Northern Hemisphere showing a rapid increasing trend. Between 2001 and 2022, Africa witnessed the largest areas that had been burned each year (33.32 million hectares), followed by Southern America (5.18 million hectares) and Asia (5.12 million hectares).

China's forest area accounts for 5.4 percent of the global total forest, but its carbon emissions from forest fires only account for 0.65 percent of the global total for forest fire emissions, significantly lower than the global average, the blue paper noted. From 2001 to 2022, China's carbon emissions from forest fires showed a significant downward trend, with annual average carbon dioxide emissions of 10 million tons.

China has adhered to the policy of "prevention as the primary focus, combining prevention and control." The country has also established an effective forest fire warning and monitoring system, and a comprehensive fire prevention network. Thanks to the efforts of the whole society, both the frequency and the burned area of forest fires have been declining since 2001, according to Xu.

Georgian Ambassador to China Archil Kalandia participated in the 5th China-CEEC SME Cooperation Forum held in Cangzhou, North China's Hebei Province on Monday, with a total of more than 600 Chinese and Central and Eastern European enterprises participating in the forum. During the meeting, Ambassador Kalandia met with China's Vice Foreign Minister Deng Li. 

Ambassador Kalandia reiterated his desire for the Georgian side to be granted the status of observer state in the mechanism of cooperation between China and Central and Eastern European Countries (CEEC). Deng expressed his support for the ambassador's cause. The two sides will continue to hold consultations with the countries of Eastern and Central Europe on the above-mentioned issues.

Deng said that the strengthening of cooperation between small and medium-size enterprises (SME) in China and Central and Eastern European countries is of great practical significance. We should further buttress our development strategies, expand cooperation in areas such as green development and digital transformation, and create new growth points through innovative ways of cooperation, he said at the forum. 

Launched in 2012, the China-CEEC Cooperation Mechanism is a platform for cross-regional cooperation between China and European countries to promote the deepening of economic and trade cooperation between China and Europe.

Around the six-month mark, babies start to get really fun. They’re not walking or talking, but they are probably babbling, grabbing and gumming, and teaching us about their likes and dislikes. I remember this as the time when my girls’ personalities really started making themselves known, which, really, is one of the best parts of raising a kid. After months of staring at those beautiful, bald heads, you start to get a glimpse of what’s going on inside them.

When it comes to learning language, it turns out that a lot has already happened inside those baby domes by age 6 months. A new study finds that babies this age understand quite a bit about words — in particular, the relationships between nouns.
Work in toddlers, and even adults, reveals that people can struggle with word meanings under difficult circumstances. We might briefly falter with “shoe” when an image of a shoe is shown next to a boot, for instance, but not when the shoe appears next to a hat. But researchers wanted to know how early these sorts of word relationships form.

Psychologists Elika Bergelson of Duke University and Richard Aslin, formerly of the University of Rochester in New York and now at Haskins Laboratories in New Haven, Conn., put 51 6-month-olds to a similar test. Outfitted with eye-tracking gear, the babies sat on a parent’s lap and looked at a video screen that showed pairs of common objects. Sometimes the images were closely related: mouth and nose, for instance, or bottle and spoon. Other pairs were unrelated: blanket and dog, or juice and car.

When both objects were on the screen, the parents would say a sentence using one of the words: “Where is the nose?” for instance. If babies spent more time looking at the nose than the other object, researchers inferred that the babies had a good handle on that word.

When the babies were shown tricky pairs of closely related objects, like a cup of juice and a cup of milk, the babies spent nearly equal time looking at both pictures, no matter what word their parents said. But when the images were really distinct (juice and car, for instance) the babies spent more time looking at the spoken word.
These babies detected a difference between the “milk-juice” pair and the “juice-car” pair, recognizing that one pair is similar and the other isn’t, the researchers conclude November 20 in the Proceedings of the National Academy of Sciences.
To see whether this ability was tied to domestic life, the researchers sent the babies home with specialized gear: vests with audio recorders and adorable hats outfitted with small video cameras, one just above each ear. A camera on a tripod in a corner of the home also captured snippets of daily life. The resulting video and audio recordings revealed that babies whose caregivers used more nouns for objects in the room were better at the word task in the lab.

That means that babies learn words well when they can actually see the object being talked about. Hearing, “Open your mouth. Here comes the spoon!” as they watch the spoon come flying toward their face makes a bigger vocabulary impression than “Did you like riding in the car yesterday?”

A similar idea came from a recent study on preschoolers. These kids learned best when they saw one picture at a time (or when parents pointed at the relevant object). Babies — and older kids, too — like to see what you’re talking about.

The results are too early to provide advice to parents, says Bergelson, a cognitive and developmental psychologist. “But I think one thing suggested by our work is that parents should consider their young baby to be a real conversational partner,” she says. “Even young infants are listening and learning about words and the world around them before they start talking themselves, and their caregivers make that possible.”

There’s still lots to figure out about how babies soak up vocabulary. And as scientists come up with more ways to peer into the mysterious inner workings of a baby’s mind, those answers might lead to even more interesting conversations with our babies.

Termites are the new cockroach.

Literally. The Entomological Society of America is updating its master list of insect names to reflect decades of genetic and other evidence that termites belong in the cockroach order, called Blattodea.

As of February 15, “it’s official … that termites no longer have their own order,” says Mike Merchant of Texas A&M University in College Station, chair of the organization’s common names committee. Now all termites on the list are being recategorized.
The demotion brings to mind Pluto getting kicked off the roster of planets, says termite biologist Paul Eggleton of the Natural History Museum in London. He does not, however, expect a galactic outpouring of heartbreak and protest over the termite downgrade. Among specialists, discussions of termites as a form of roaches go back at least to 1934, when researchers reported that several groups of microbes that digest wood in termite guts live in some wood-eating cockroaches too.

Once biologists figured out how to use DNA to work out genealogical relationships, evidence began to grow that termites had evolved as a branch on the many-limbed family tree of cockroaches. In 2007, Eggleton and two museum colleagues used genetic evidence from an unusually broad sampling of species to publish a new tree of these insects (SN: 5/19/07, p. 318). Titled “Death of an order,” the study placed termites on the tree near a Cryptocercus cockroach.

Cryptocercus roaches live in almost termitelike style in the Appalachian Mountains, not too far from chemical ecologist and cockroach fan Coby Schal at North Carolina State University in Raleigh. Monogamous pairs of Cryptocercus roaches eat tunnels in wood and raise young there. The offspring feed on anal secretions from their parents, which provide both nutrition and starter doses of the wood-digesting gut microbes that will eventually let the youngsters eat their way into homes of their own.
Termites are “nothing but social cockroaches,” Schal says. Various roaches have some form of social life, but termites go to extremes. They’re eusocial, with just a few individuals in colonies doing all of the reproducing. In extreme examples, Macrotermes colonies can grow to 3 million individuals with only one queen and one king.

After several years of debate, the common names committee of the American entomologists’ organization voted it was time to switch to the new view of termites. At a February meeting of the society board, there was no objection. The common names of individual termite species, of course, will remain as something-something “termite.”

Considering whether to demote a whole order of insects is an uncommon problem, says Whitney Cranshaw of Colorado State University in Fort Collins, a longtime member of the society’s naming committee. “Probably some of us, including myself, didn’t want to make the change because we liked it the way it was,” he says. Termites and cockroaches as separate orders were easy to memorize for the undergraduates he teaches. Yet, he voted yes. “It’s what’s right.”

Two human mummies housed at the British Museum in London for more than a century boast the world’s oldest known — and longest hidden — tattoos of figures and designs, a new investigation finds. These people lived in Egypt at or shortly before the rise of the first pharaoh around 5,100 years ago.

Radiocarbon analyses of hairs from the mummies date the bodies to between 3351 B.C. and 3017 B.C., says a team led by Egyptologist Renée Friedman of the University of Oxford and bioarchaeologist Daniel Antoine of the British Museum in London. Infrared photography revealed that smudges on a male mummy’s upper right arm depict a wild bull and a Barbary sheep, while a female mummy bears four S-shaped patterns on her right shoulder and a line with bent ends on her right arm. These animals and figures appear in Egyptian art from the same period, the researchers report online March 1 in the Journal of Archaeological Science. Both sets of tattoos — which consist of a carbon-based pigment, possibly soot — may have symbolized power, social status or knowledge of cult activities, but their precise meanings are unclear.
The two were the only mummies found with tattoos, out of seven mummies originally buried at a southern Egyptian site and now held at the British Museum. All of the bodies had been preserved by the desert’s dry heat.

The tattooed Egyptian mummies are approximately as old as Ötzi the Iceman. The mummified man found in the Italian Alps has 61 dark lines tattooed on his limbs and torso, but no pictures or designs (SN: 1/23/16, p. 5). Some of the Iceman’s tattoos covered areas of joint disease and may have been intended as treatments. CT scans of the two Egyptian mummies found no signs of bone disease near or below tattoos.

A new analysis is shedding light on drought in Mongolia, both past and future.

By studying the rings of semifossilized trees, researchers constructed a climate history for the semiarid Asian nation spanning the last 2,060 years — going 1,000 years further back than previous studies.

It was suspected that a harsh drought from about 2000 to 2010 that killed tens of thousands of livestock was unprecedented in the region’s history and primarily the result of human-caused climate change. But the tree ring data show that the dry spell, while rare in its severity, was not outside the realm of natural climate variability, researchers report online March 14 in Science Advances.
“This is a part of the world where we don’t know about the past climate,” says Park Williams, a bioclimatologist at Columbia University’s Lamont-Doherty Earth Observatory in Palisades, N.Y., who was not involved with the study. “Having this record is a great resource for trying to understand past droughts in the region.”

In recent years, many studies have sought to unsnarl the role of anthropogenic climate change from natural variability on extreme weather events (SN: 1/20/18, p. 6). Such work is necessary for more accurately predicting future climate trends and helping governments prepare for the most severe scenarios, says study coauthor Amy Hessl, a physical geographer at West Virginia University in Morgantown. This is especially true in countries like Mongolia that lack certain infrastructure, such as enough water reservoirs, to ease the impact of events like prolonged drought.

Hessl and her colleagues studied tree rings in hundreds of samples of Siberian pines, well-preserved by Mongolia’s naturally dry climate. A ring’s width indicates how much the tree grew in a year. In wet years, the rings are wider; in dry years, skinnier.
The recent dry spell was the severest in recorded history. But the rings showed that an even more severe drought took place around the year 800, long before anthropogenic climate change began.

Still, computer simulations suggest that about a third of the recent drought’s severity could have been caused by elevated temperatures linked to climate change, the researchers found. The finding is consistent with studies on how climate change has affected other recent droughts in South Africa and California.

Using computer simulations, Hessl and her colleagues conclude that droughts in coming decades may not be any worse than those seen in Mongolia’s past. The team predicts that as global temperatures rise over the next century, Mongolia will first become drier, then wetter. Increased heat initially will dry out the plains. But at a certain point, hot air holds more moisture, leading to increased precipitation.

Those climate patterns will likely guide how Mongolia develops, Hessl says, because they have in the past. In 2014, she and colleagues published a paper detailing how a 15-year period of unprecedented temperate and rainy conditions in 13th century Mongolia may have led to the rise of Genghis Khan (SN Online: 3/10/14).