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Science; 381(6661), 1 September 2023

Arctic sea ice, ocean, and climate evolution

Wind variability affects the rate of Arctic sea ice decline

Fluctuating Atlantic inflows modulate Arctic atlantification

Shifts in large-scale atmospheric circulation patterns have important consequences for Arctic climate.

Did our ancestors nearly die out?

Genetic analyses suggest an ancient human population crash 900,000 years ago

Genomic inference of a severe human bottleneck during the Early to Middle Pleistocene transition

A severe bottleneck that brought human ancestors close to extinction occurred between about 930 and 813 thousand years ago.

Science, 381(6660), 25 August 2023

As oceans warm, scientists forecast heat waves

Sea temperature predictions could inform fisheries management and conservation

Forest carbon offsets are failing

Analysis reveals emission reductions from forest conservation have been overestimated
Action needed to make carbon offsets from forest conservation work for climate change mitigation

Most REDD projects deliver little to no decrease in deforestation and forest degradation.



Science, 381(6662), 8 September 2023


Widespread shifts in body size within populations and assemblages

Analysis of plant and animal communities spanning from 1960 to 2020 and across six taxon groups reveals prevailing decreases inbody size.