Amazon Forest 2000 - The state of Rondônia in western Brazil
The state of Rondônia in western Brazil — once home to 208,000 square kilometers of forest (about 51.4 million acres), an area slightly smaller than the state of Kansas — has become one of the most deforested parts of the Amazon. In the past three decades, clearing and degradation of the state’s forests have been rapid: 4,200 square kilometers cleared by 1978; 30,000 by 1988; and 53,300 by 1998. By 2003, an estimated 67,764 square kilometers of rainforest—an area larger than the state of West Virginia—had been cleared. Source: Amazon Deforestation – NASA
World’s Forests Losing Their Green. Billions of tonnes of CO2 Released
By Stephen Leahy
UXBRIDGE, Canada, Feb 3, 2011 (IPS)
Last year’s severe drought in the Amazon will pump billions of tonnes of additional carbon dioxide (CO2) into the atmosphere, a new report has found.
Researchers calculate that millions of trees died in 2010, which means the Amazon is soaking up much less CO2 from the atmosphere, and those dead trees will now release all the carbon they’ve accumulated over 300 or more years.
The widespread 2010 drought follows a similar drought in 2005 which itself will put an additional five billion tonnes of CO2 into the atmosphere, Simon Lewis of University of Leeds in the UK and colleagues calculate in a study published Thursday in Science. The United States emitted 5.4 billion tonnes of CO2 from fossil fuel use in 2009.
The two droughts will end up adding an estimated 13 billion tonnes of additional CO2 – equivalent to combined emissions in 2009 from China and the U.S. – and likely accelerating global warming.
“New growth in the region will not offset those releases,” Lewis told IPS.
After the 2005 drought, Lewis and Brazilian scientist Paulo Brando from the Amazon Environmental Research Institute (IPAM) led teams of researchers on the ground to assess the impacts. They determined that only a few trees died per hectare, and so while the forest canopy cover looked relatively unchanged, there had been a significant change in the forest’s carbon balance. Continue reading →
The Amazon jungle “is very close to a tipping point,” and if destruction continues, it could shrink to one third of its original size in just 65 years, warns Thomas Lovejoy, world-renowned tropical biologist.
[UPDATE Sept 6’10: The Amazon River is at its lowest level in 40 years — in 2005 devastating dry spell damaged vast swaths of South American rainforest Amazon May Be Headed For Another Bad Drought]]
Climate change, deforestation and fire are the drivers of this potential Amazonian apocalypse, according to Lovejoy, biodiversity chair at the Washington DC-based Heinz Centre for Science, Economics and the Environment, and chief biodiversity adviser to the president of the World Bank.
Image via Wikipedia
Lovejoy laid out the scenario for participants at the Biodiversity Science Policy Conference in Paris last week, sponsored by UNESCO (United Nations Educational, Scientific and Cultural Organisation), and marking the beginning of the U.N.’s International Year of Biodiversity.
“The World Bank released a study that finally put the impacts of climate change, deforestation and fires together. The tipping point for the Amazon is 20 percent deforestation,” and that is “a scary result,” Lovejoy told Tierramérica in an interview.
The study, “Assessment of the Risk of Amazon Dieback,” released Jan. 22, drew on the expertise of several international research institutions, including Japan’s Meteorological Research Institute, Britain’s Exeter University, Brazil’s Centre for Weather Forecasting and Climate Change (CPET/INPE), Germany’s Potsdam Institute and Earth3000.
Stephen Leahy, International Environmental Journalist 