Tropical deforestation distorts rainfall and winds of the world.
Iberian America reports, December 29, 2014
The catastrophic effects of deforestation are not limited to increased CO2 in the atmosphere. The elimination of forests changes the humidity and air flow, resulting in changes of fluctuations in rainfall patterns and temperature increases. The forests play a key role in the direct cooling of the earth and the generation of moisture. For the first time, a study published in the journal Nature Climate Change examines the impact of the elimination of tropical forests known as “the lungs of the world ‘, in wind and water systems around the world. Populations feel the impact of these climate changes, whether in Brazil, in the Midwest of the US, Europe, Africa or Asia.
Two researchers from the University of Virginia (USA) published in the journal Nature Climate Change’s largest collection of updates on how forests impact on wind and water systems-of which depend for food and survive- data. The report reveals that these forests play a key role in the direct cooling of the earth and the generation of moisture.
This happens not only in the immediate region where deforestation occurs, but also in areas that are critical for food production, including those that are thousands of kilometers away from where the logging occurs, “he told Deborah Sync Lawrence, professor of environmental sciences and lead author of the work, which also signs his companion at the University of Virginia, Karen Vandecar.
Climate models indicate that the total deforestation of the tropical forests of the Amazon, Africa and Southeast Asia could lead to an increase in average global temperature to 0.7 ° C. This would double the warming observed since 1850. In the case of Europe, the European Environment Agency states that the European regions particularly vulnerable to climate change include “Southern Europe and the Mediterranean basin (due to increased heat waves and drought). ”
With an increase or total Amazon deforestation level of annual precipitation would fall in the Midwest of the USA. In the case of deforestation in Central Africa, a decrease in precipitation and temperature in the south of France would occur. Not to mention that farmers around the world, and the people who depend on this for their food, feel the impact of these changes, whether in Brazil, in the Midwestern United States, Europe or China, “says the researcher. Climatic effects outside the tropics occur because deforestation alters the upper reaches of the tropical atmosphere. This environment is connected to the atmosphere of the mid and high latitudes, and a jolt in these places will be felt elsewhere.
Imagine that the fire in your kitchen are the tropics. Steam rising from a pot of boiling water, hits the ceiling. Then, the gaseous water begins to flow outward along the ceiling, through the door and your foyer. The corridor could be Europe or North America. Similarly, the hot air rises in the tropics. Finally they find something like a roof and is moving north or south, “exemplifies Lawrence .The changes in the tropical atmosphere of this mode can flow into the atmosphere in Europe, North America and northern Asia, as well as southern Africa and parts of South America. As these waves are changes. As well the atmospheric changes form waves that alter climate
Forests are not lungs, are the ‘sudorípadas glands’ Earth.
Tropical forests regulate climate. One way in which they do so is to remove water from the soil by the roots of the trees, and move through the stalks, and ultimately, through the leaves. Millions and millions of leaves of trees have a very significant result of cooling.
Like the sweat of our brow cools us when we are hot, the water evaporates on the leaves, causing the same effect and also in the atmosphere around them. Have you noticed the change in temperature as it passes through the shadow of the trees in hot day? It is dramatic. Simply because partly they block the sun, but some of them also do so because water flows “Farmers and food supplies are exposed to the risks of global warming and uneven rain can ruin the crops of coffee and corn the ‘granaries of the world, “says Lawrence.
The impacts are immediate.
Meteorological data show that in Thailand, the beginning of the dry season has less rainfall due to deforestation. And in some parts of the Amazon, the largest expanse of tropical forest in the world, before the expected rain period also changed by massive logging. What happens on the surface of the Earth is an important factor in climate change. It was found that the location of deforested areas may influence the impact of regional climates. “Deforestation in West Africa and the Democratic Republic of Congo could reduce rainfall in the region between 40% and 50%, and increase temperatures in this area up to 3 ° C. In the Amazon basin, 40% degradation of forests could reduce rainfall in the rainy season about 12% and in the dry season 21%. also reduce rainfall 4% in the Rio de la Plata, a production center of soybeans, corn and wheat, to thousands of kilometers of the Amazon.
Most people know that climate change is a dangerous global problem and it is caused by the release of carbon into the atmosphere. But the elimination of forests changes the humidity and air flow, resulting in changes of fluctuations in rainfall patterns and temperature increases that are equally harmful and happen immediately.
Bibliographic reference: Deborah Lawrence and Karen Vandecar, tropical Effects of deforestation on climate and agriculture. Nature Climate Change, December 18, 2014. DOI: 10.1038 / NCLIMATE2430