Tag Archives: Amazon deforestation

Climate Change Unlikely to Kill Amazon Rainforest

The current Earth system models used for climate predictions show that the Amazon rainforest is very sensitive to water stress. Since the air in the future is predicted to get warmer and drier with climate change, translating to increased water stress, this could have large implications not just for the forest’s survival, but also for its storage of CO2. If the forest is not able to survive in its current capacity, climate change could greatly accelerate.

Columbia Engineering researchers decided to investigate whether this was true, whether these forests are really as sensitive to water stress as what the models have been showing. In a study published in Science Advances, they report their discovery that these models have been largely over-estimating water stress in tropical forests.

The team found that, while models show that increases in air dryness greatly diminish photosynthesis rates in certain regions of the Amazon rainforest, the observational data results show the opposite: in certain very wet regions, the forests instead even increase photosynthesis rates in response to drier air…[In fact] As the trees become stressed, they generate more efficient leaves that can more than compensate for water stress.”…

“So much of the scientific research coming out these days is that with climate change, our current ecosystems might not be able to survive, potentially leading to the acceleration of global warming due to feedbacks,” Gentine added. “It was nice to see that maybe some of our estimates of approaching mortality in the Amazon rainforest may not be quite as dire as we previously thought.”

Excerpts from Some Amazon Rainforest Regions More Resistant to Climate Change than Previously Thought, Columbia Engineering, Nov. 20, 2020

The $4 Trillion Blackmail: The Amazon is Ours not Brazil’s

More than two dozen financial institutions around the world are demanding the Brazilian government rein in surging deforestation, which they said has created “widespread uncertainty about the conditions for investing in or providing financial services to Brazil”. The call for action, delivered in a letter to the Brazilian government on June 23, 2020, comes as concerns grow that investors may begin to divest from Latin America’s largest economy if Jair Bolsonaro’s administration fails to curb environmental destruction. “As financial institutions, who have a fiduciary duty to act in the best long-term interests of our beneficiaries, we recognise the crucial role that tropical forests play in tackling climate change, protecting biodiversity and ensuring ecosystem services,” said the letter, signed by 29 financial institutions managing more than $3.7tn in total assets.

“Considering increasing deforestation rates in Brazil, we are concerned that companies exposed to potential deforestation in their Brazilian operations and supply chains will face increasing difficulty accessing international markets. Brazilian sovereign bonds are also likely to be deemed high risk if deforestation continues.” Deforestation in the Amazon rainforest has surged in Brazil since the election of Mr Bolsonaro, a rightwing former army captain, who supports opening the protected lands to commercial activity. In the first four months of 2020, an area twice the size of New York City was razed as illegal loggers and wildcat gold miners

Investors said they are particularly concerned about Brazil’s meatpacking industry, which risks being shut out of international markets over its alleged role in deforestation. Brazil’s JBS has been repeatedly accused by environmentalists of buying cows from deforested lands in the Amazon. In May 2020 more than 40 European companies, including Tesco and Marks and Spencer, warned they would boycott Brazilian products if the government did not act on deforestation. 

Excerpts from Investors warn Brazil to stop Amazon destruction, FT, June 23, 2020