A brilliant comparison of CO2 emission trends from burning coal, oil and gas, and how each must change in order to meet budgeted goals (Carbon Brief). The spotlight is on coal, which has grown the fastest in this century, is by far the biggest source, and must now quickly begin a truly precipitous decline. A set of charts lays everything out in a perfect way, dramatically exposing the enormous difficulty involved. “Either action to tackle emissions from fossil-fuel burning must be rapidly stepped up, or the global community must accept warming beyond the levels deemed dangerous in the Paris Agreement – as adopted by consensus among more than 190 countries in 2015.”
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Strong evidence that substantial declines in bumblebee populations are caused by extreme heat waves (Inside Climate News). The evidence is reported in a new study, based on the extraordinary collection and analysis of more than a half million observations that were variously recorded in Europe and North America since 1901. “The researchers mapped where the bees are now compared to where they used to be historically, and matched those records with changes in temperature and precipitation…..They are disappearing from areas where it’s getting hotter fast…..We could predict the changes for individual species and communities of bumblebees with surprising accuracy…..The new study also suggests that extreme heat poses risks for other species, including mammals, birds and reptiles. Bumblebees are an indicator species.” All of them are susceptible to other, more familiar causes of decline; extreme heat waves are now worthy of being classified as a separate and important addition.
https://insideclimatenews.org/news/05022020/bumblebee-climate-change-heat-decline-migration
A new study has a deep analysis of drastic changes to the Brazilian Amazon involving a combination of deforestation, wildfires and climate change (Mongabay). Wildfires, other than those set by humans, can increasingly penetrate the rainforest itself as the climate becomes hotter and drier. “That’s bad news for the region, and the world. Each year, the Amazon removes vast amounts of carbon dioxide from the atmosphere, sequestering it in vegetation and soils, and playing a critical role in the planet’s carbon cycle. But widening and intensifying Amazon fires threaten to permanently remove carbon biomass from the rainforest, turning one the world’s most important net carbon sinks to a net carbon source…..between now and 2050.”
https://news.mongabay.com/2020/02/escalating-firestorms-could-turn-amazon-from-carbon-sink-to-source-study/
A new daily high temperature of 18.3C (65F) has been recorded for the continent of Antarctica (The Guardian). “The reading, taken at Esperanza on the northern tip of the continent’s peninsula, beats Antarctica’s previous record of 17.5C, set in March 2015…..The lowest temperature ever recorded in Antarctica – and anywhere on Earth – was at the Russian Vostok station, when temperatures dropped to 89.2C (-129F) on 21 July 1983.”
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What happened to the world’s largest iceberg, created from Antarctica’s Larsen C ice shelf in 2017? (BBC News). This post has everything mapped out as the berg prepares to enter the open sea. So far it has lost very little of its bulk, but that will soon change.
Carl