Ice sheets have been found to store massive amounts of carbon, far exceeding that of permafrost (Phys.org). “The Antarctic Ice Sheet alone potentially stores up to 20,000 billion tonnes of organic carbon—ten times more than that estimated for Northern Hemisphere permafrost.” The growth of this storage has had profound effects on climate in the past, and a whole new set of effects can be expected in the future as the sheets decay. There is much here to be learned about, clearly a subject of high importance.
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Another important new study links atmospheric moisture content to an observed slowdown in global vegetation growth (Carbon Brief). “Global warming is driving changes to water vapour levels, the research finds, which could, in turn, be affecting the rate of plant photosynthesis – the process underpinning plant growth…..At present, the land takes in 30% of the greenhouse gases emitted by humans…..The findings suggest that, in the future, the ability of plants to absorb the CO2 emitted by humans may be “substantially reduced”, the lead author tells Carbon Brief.” The concept of Vapor Pressure Deficit plays a key role here, which you may or may not find easy to apprehend in all its nuances.
–This site takes a different approach to introducing the study:
–A link to the full study, with open access. The final conclusion, if beyond controversy, is certainly troubling with respect to its potential for requiring alterations to current climate models: “The results of our analysis suggest that this projected increased VPD might have a substantially negative impact on vegetation, which must be examined carefully when evaluating future carbon cycle responses.”
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A new report from WWF reveals a shocking decline in forest animal populations (Deutsch Welle). “The study, titled “Below The Canopy,” tracked the development of 268 vertebrate species and 455 populations in forests around the world. It found that the numbers of birds, mammals, amphibians and reptiles have dropped by an average of 53% since 1970.” Climate change is one of several secondary causes, with deforestation and degradation being first.
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Carl