How Much Can Forests Fight Climate Change? A Sensor in Space Has Answers. – The New York Times

By Manuela Andreoni and Leanne Abraham

Andreoni reported from Rio de Janeiro and Abraham from New York

Dec. 8, 2023

“Over the last century, governments around the world have drawn boundaries to shield thousands of the world’s most valuable ecosystems from destruction, from the forests of Borneo and the Amazon to the savannas of Africa.

These protected areas have offered lifelines to species threatened with extinction, supported the ways of life for many traditional communities and safeguarded the water supplies of cities.

But reserves are facing increasing pressure, their boundaries largely disregarded as people cut down trees and push deeper into the ecosystems set aside for protection.

Now, high in orbit, a new way of seeing forests is making it clear that, even when under assault, protected areas can still be a crucial buffer against climate change. Scientists are using laser technology to gauge the biomass of forests all around the world, which lets them calculate how much planet-warming carbon the trees are keeping out of Earth’s atmosphere.” . . . .

How Much Can Forests Fight Climate Change? A Sensor in Space Has Answers. – The New York Times

By Manuela Andreoni and Leanne Abraham

Andreoni reported from Rio de Janeiro and Abraham from New York

Dec. 8, 2023

“Over the last century, governments around the world have drawn boundaries to shield thousands of the world’s most valuable ecosystems from destruction, from the forests of Borneo and the Amazon to the savannas of Africa.

These protected areas have offered lifelines to species threatened with extinction, supported the ways of life for many traditional communities and safeguarded the water supplies of cities.

But reserves are facing increasing pressure, their boundaries largely disregarded as people cut down trees and push deeper into the ecosystems set aside for protection.

Now, high in orbit, a new way of seeing forests is making it clear that, even when under assault, protected areas can still be a crucial buffer against climate change. Scientists are using laser technology to gauge the biomass of forests all around the world, which lets them calculate how much planet-warming carbon the trees are keeping out of Earth’s atmosphere.

Quantifying the ability of protected ecosystems to store planet-warming carbon has long been a challenge for researchers. That’s largely because older, flat satellite imagery can’t distinguish how tall or wide trees were.

“We can use these new satellite data streams to monitor forest benefits in three dimensions and do the carbon piece of this in a way we never were able to before,” said Laura Duncanson, a remote sensing scientist at the University of Maryland and one of the authors of a study based on the new data.

In the past two decades, according to the research, protected areas around the world have helped stop deforestation and kept as much as a year’s worth of fossil fuel emissions from being released into the atmosphere.

The study, which was published this year, showed that policies designed to protect nature can also be important for mitigating global warming, Dr. Duncanson said. She called the findings “a beautiful side benefit” of global forest conservation.” . . .

Thank you Manuela Andreoni and Leanne Abraham. Here is a comment I particularly liked:

Erik Frederiksen

Asheville, NCDec. 8

Counting on trees to help us slow climate change is problematic because already we are seeing forests transitioning from carbon sinks to net emitters of carbon as the trees succumb to pests, drought and fires. Since we have significant further warming in the pipeline we can expect increasing rates of tree mortality. We need to transition our energy sector to renewables much more rapidly and begin a WWII type effort to remove carbon from the atmosphere. The climate changes that we are making will last for many thousands of years and the biodiversity loss will last for millions of years.

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