According to Unger's latest findings, the volatile organic compounds (VOCs)
emitted by trees heat our climate.
Aerosol «blue haze», as seen here in the Great Smoky Mountains in North Carolina, is formed by the oxidation of volatile organic compounds
emitted by trees.
Those who committed to engaging in two to four hours of forest bathing on two consecutive days also inhaled antimicrobial compounds
emitted by trees and plants.
Drones launch from a tower in the Amazon rainforest to map and monitor the unique chemical signals
emitted by trees known as volatile organic compounds (VOCs).
In one on - going project, funded by Harvard University's Climate Change Solutions Fund (CCSF), Martin and his team are mapping and monitoring the unique chemical signals
emitted by trees known as volatile organic compounds (VOCs).
CLOUD shows that organic vapours
emitted by trees produce abundant aerosol particles in the atmosphere in the absence of sulphuric acid.
But the reactive gases
emitted by trees can also increase the amounts of ozone and methane, both greenhouse gases which have warming effects on the climate.
An international team of scientists, led by the University of Leeds, studied the way that reactive gases
emitted by trees and vegetation affect the climate.
Not exact matches
While weather stations typically measure air temperatures just above the surface, satellites record the thermal energy
emitted by soil, rock, pavement, grass,
trees and other features of the landscape.
But the thinking is that the carbon dioxide
emitted by renewable sources will eventually get reabsorbed through photosynthesis, as
trees, corn, and other biofuel sources grow back.
For the entire two - county region, the UI team reported that while on average 6.8 billion pounds of carbon were
emitted annually, only 73 million pounds of carbon were sucked up
by trees — about one percent of the total carbon generated yearly in the study region.
Allowing the forest to regrow on areas that have been deforested helps
by creating «new» suitable areas for species to survive in while allowing some of this excess carbon to be stored back in the new
trees rather than
emitted into the atmosphere.»
VOCs come out of tailpipes and smokestacks as a
by - product of burning fossil fuels; the
trees emit them in part to repel insects and to attract pollinators.
That's because they underwent a process in which silica — likely
emitted by a nearby volcano — saturated the
tree and took on the shape of the wood's internal structure as it decayed, preserving its 3D cellular structure.
Methods: In this new approach, the team began with an atmospheric aerosol sample that contains thousands of molecules formed in the reactions of ozone, a common atmospheric oxidant, with limonene, a molecule
emitted by various types of
trees, which is responsible for the citrus scent found walking among the orange
trees.
One theory is that volatile - oil vapors
emitted by eucalyptus
trees in the surrounding bushland (the same vapors that can fuel bush fires) settle onto grape skins and contribute to the earthiness and the mulberry nose typical of Margaret River reds.
The logic is straightforward: Plants need atmospheric carbon dioxide to produce food, and
by emitting more CO2 into the air, our cars and factories create new sources of plant nutrition that will cause some crops and
trees to grow bigger and faster.
Although global forests currently capture and store more carbon each year than they
emit, 46 the ability of forests to act as large, global carbon absorbers («sinks») may be reduced
by projected increased disturbances from insect outbreaks, 47 forest fire, 48 and drought, 49 leading to increases in
tree mortality and carbon emissions.
A new study released
by Global Forest Watch Canada finds that significant amounts of greenhouse gases are
emitted through the disturbance and / or removal of biocarbon (
trees, shrubs, peats), which overlay Alberta's oil sands.
Biomass power plants do
emit carbon dioxide, a greenhouse gas, but they release no more than what is naturally in the carbon cycle as
trees are planted, downed —
by man or nature — and replanted.
And a new study
by US scientists shows that
tree trunks in at least one sample of an upland forest actually
emit methane into the atmosphere.
Even if new
trees are planted promptly to replace old ones, they will take between 20 and 100 years to grow sufficiently to take up all the CO2
emitted by burning the old
trees.
Even based on the false assumption that only wood waste, not whole
trees, are being burnt, Booth found that «up to 95 percent of cumulative CO2
emitted [
by the biomass burning power plants] represent a net addition to the atmosphere over decades.»
Researchers at the Yale School of Forestry and Environmental Studies have discovered that
trees right here in Connecticut that are diseased
by fungi can
emit high concentrations of methane — a greenhouse gas that plays a role in climate change.
Supported
by sales of the special drinks, Wonderfruit invested in 10,000 new
trees to ensure the festival was carbon positive — that is, it helped lock away more carbon than it
emitted.
In collaboration with the Chinese Academy of Sciences, researchers provided molecular - level insights into how alpha - pinene, a compound
emitted in large quantities
by pine
trees, helps form new atmospheric aerosols.
Of course when they fly to an away game the organization plants
trees in the Philadelphia area to make up for the carbon dioxide
emitted by the team's plane, beautifying the city in the process.
[Note that a different definition of «carbon neutral» describes carbon off - setting and means that any carbon
emitted into the air is offset
by tree planting or new conservation measures to lower the amount of
emitted carbon dioxide.
Older
trees grow more slowly, sequestering less, and CO2 is
emitted by dying
trees and detritus, thereby creating more of a CO2 balance than a CO2 sponge.