According to new research, global warming seems to make the leaves of trees flow earlier, according to a new idea, warmer temperatures delay the onset of autumn.
This discovery is important because trees draw large amounts of carbon dioxide from the air and therefore play a major role in managing the climate.
Rising temperatures also mean that spring is coming earlier and overall, the growing season for trees in temperate regions of the planet is getting longer. However, previous automobiles mean that trees can store significantly less carbon than previously thought, providing less brakes on global heating.
Scientists are still speculating on how big the impact will be, but it could be as much as 1bn tonnes of CO2 a year, more than Germany’s annual emissions.
The new research is based on a vast dataset of observations of European trees, varied experiments and mathematical models at the light and CO2 levels. It showed that along with temperature and length of day, a carbon is a major factor in determining the amount of carbon a tree absorbs, while it no longer needs its leaves and will kill them. Scientists have compared the effect to a person being unable to become full after a heavy meal and eat more food.
Other recent research shows that fast-growing trees have shorter lifespans and their lifespans have been significantly shortened by environmental crises and large numbers of fallen trees.
“For decades we’ve been assuming that the growing asons are growing and the autumn leaves are closing,” said Prof. ETH Zurich of Switzerland. Said Thomas Croth, who was one of the study team. “However, this research suggests that as tree productivity increases, the leaves fall off really early.”
The previous model, Dello, which did not include the amount of carbon that trees absorbed in one season, showed that autumn could be two to three weeks later by the end of the century on current emission trends. But a new model of scientists suggests that autumn may actually come six days earlier. “It simply came to our notice then [in carbon storage] It won’t be as close as we expected, “said Crother.
Christine Rollinson, an ecologist at Morton Arboretum in Illinois, USA, who was not part of the study team, said previous models were known as dello simplifications but were the best available.
“The big challenge is that autumn is always messed up.” “Depending on where you are and what species you are looking at, there is some evidence that leaf fall is happening earlier and some is happening later. But understanding how well a tree grows during tu helps you understand tree-to-tree diversity.
“What’s particularly surprising about this study is that it provides different lines to reach the same conclusion.” But she was wary of the impact of previous aut tomos on overall carbon storage: “It’s not yet clear how this is cascading.”
Rollinson said it was important to cut fossil fuel and cut emissions from deforestation to meet the weather crisis: “We can’t put all this responsibility on him. [growing] Trees
The research, published in the journal Science, used more than 430,000 leaf fall observations as well as experiments and modeling at 3,800 sites in Central Europe between 1948 and 2015.
Photosynthesis in leaves converts to COA2 From the atmosphere into carbon compounds that the tree uses to live and grow. If a tree can no longer use carbon, it stops retaining its leaves and it falls off.
It is not known what specific factor or combination of factors causes this growth, but it may be the availability of nitrogen. About %%% deciduous trees cannot supply their own nitrogen, so the researchers believe their findings apply to most trees in temperate regions around the world.
Estimate how much CO fall will fall in the fall of the previous fall2 Compared to previous models Dello, being occupied by trees, whose process is ongoing. Based on previous research, scientists say it could be in the order of 1bn tonnes a year.
