While Siberia may be one of the last expanses on Earth where human presence is relatively scarce, scientists are finding some surprising connections between humans and fires in these frigid, northern forests. Until now, most researchers assumed that lightning caused most of the fires that burned in Siberia. But a new study by NASA scientists and others used a NASA satellite to map where and when fires lit up over a three year period. The satellite showed that Siberian fires burned mostly near people.
The study looked at an area in Central Siberia covering a little less than 6 million square kilometers (2,317,000 square miles). The number of fires in these areas varied greatly from year to year. For example, in 2001, less than half a percent of the land, or about 27,000 square kilometers (10,420 square miles) caught fire and burned. In 2003, that number tripled to almost 1.4 percent, or roughly 81,000 square kilometers (31,270 square miles) of land. But for each of the three years between 2001 and 2003 where data were available, the study found that most of the fires occurred in areas near where people had changed the land cover with roads, rail lines, towns and cities, industrial areas and other features related to humans. In fact, roads were the man-made feature with the greatest link to fires, with 97 percent of all fires in 2003 occurring within 300 kilometers (186 miles) of a major road.
But, the researchers caution, the striking link does not yet prove that humans are causing these fires. For starters, most of the fires were detected in southern areas, where it is warmer and drier, and where more people live. In the northern part of Siberia, above 65 degrees north, the soil freezes for most of the year, and when it melts the ground is soggy. These conditions make it hard for both people and fires to survive. In the south, where summers are longer, drier and warmer, more fires would occur regardless of human presence. In order to find clearer answers to questions of how and whether or not humans may be contributing to fires, more studies are needed to examine cultural practices in the area and how they relate to fires.
Krishna Ramanujan | EurekAlert!
Foxes in the city: citizen science helps researchers to study urban wildlife
14.12.2018 | Veterinärmedizinische Universität Wien
Machine learning helps predict worldwide plant-conservation priorities
04.12.2018 | Ohio State University
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
14.12.2018 | Power and Electrical Engineering
14.12.2018 | Physics and Astronomy
14.12.2018 | Physics and Astronomy