The role of the Amazon forests in precipitation formation for South American agriculture

One mature tree in the Amazon rainforest is capable of transpiring between five hundred and one thousand liters of water per day. Collectively, the forest mass releases fifteen to twenty billion tons of moisture into the atmosphere daily. In volume, this indicator is comparable to the water discharge of the Amazon River into the Atlantic Ocean, making the forest system a key element in the water cycle.

According to studies by the National Institute for Space Research (INPE) and the National Institute of Amazonian Research (INPA), water vapor is picked up by trade winds and moves from east to west. During this movement, moisture falls as precipitation multiple times and is reabsorbed by the forest, cycling up to six times. At the foothills of the Andes, air masses are deflected to the south, providing a significant portion of annual precipitation in agricultural zones of Bolivia, Paraguay, Argentina, and a number of Brazilian states. These territories specialize in the production of soybeans, coffee, sugarcane, and feed for livestock.

Experts note that a reduction in forest area disrupts the operation of this natural "pump." Deforestation and the replacement of forests with pastures or fields of other crops significantly reduce the volume of transpiration. According to current estimates, with the loss of twenty to twenty-five percent of forest cover, the Amazon basin will reach a tipping point, after which the forest ecosystem will no longer be able to maintain the same level of water circulation.

To date, the consequences of deforestation are already being recorded in a number of regions. In the southern part of the Amazon, there is an increase in the duration of the dry season, and in Brazil, Bolivia, and Paraguay, there is instability in precipitation levels and prolonged droughts. Modeling shows that if the full operation of the forest "pump" ceases, Brazil's agricultural sector, which provides about seventy percent of the country's economic output, will face a moisture deficit, and desertification of land is likely in the northern part of Argentina and in Paraguay.