Climate Letter #1420

Researchers have found evidence of a steady decline in North Atlantic phytoplankton over the last 150 years (Phys.org).  The decline coincides with steadily rising surface temperatures.  The method used in making the determination is, in my mind, very credible, including the observed weakening of AMOC circulation.  (There were no conclusions drawn having implications for other ocean bodies, which were not included in the study.)  The finding is important because phytoplankton form the basis of the food chain upon which almost all marine animal species depend for survival.

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A new study explains how human hunting activity significantly impairs the storage of carbon in forest areas (EurekAlert).  “Many wildlife species play a key role in dispersing the seeds of tropical trees…..The loss of wildlife therefore affects the survival of these tree species…..Forest fauna are also involved in many other ecological processes, including pollination, germination, plant regeneration and growth, and biogeochemical cycles. Empirical studies across the tropics have shown that defaunation (i.e., the human-induced extinction of wildlife) can have cascading effects on forest structure and dynamics.”
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Climate change and wildfires combine to create a vicious cycle, where each augments the conditions that stimulate more of the other.  This report was written for the Union of Concerned Scientists, which believes we can break the cycle using known methods for treating both sides, but need to soon get started.
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“We are losing the web of life”:  why the global nature crisis is as dangerous as climate change.  This lengthy article was published in the award-winning journal Unearthed, a project of Greenpeace UK.  It is consistent with the UN report on the loss of biodiversity that was reviewed here yesterday, providing many insights and illustrations that offer proof of point.
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A review of the UN report by Inside Climate News.  This review has excellent coverage of what is surely one of the most profound reports ever published about today’s existential crisis in the natural world.
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An opinion contributor to The Hill makes a strong case in favor of major soil remediation as a vital component for  climate action to be effective.  Current agricultural practices remove carbon from the soil.  Putting it back would be helpful to both plant growth and the climate.  “Since soil is like a sponge, more carbon goes back into the soil and less carbon goes into the atmosphere. The better the quality of soil health, the better the quality of plant health. The healthier the plant, the more carbon it absorbs — reducing the carbon dioxide in the atmosphere, resulting in less climate change impact.”  Pretty simple, but strong public policies are needed to encourage movement on a broad scale in the faming community.
Carl

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