Science Source
Climate change affects bird nesting phenology: Comparing contemporary field and historical museum nesting records
Study key findings & significance
- Many species of birds in the Chicago area are nesting and laying eggs nearly a month earlier than they did a century ago.
- These species, including bluejays, yellow warblers and field sparrows, are now laying their first eggs 25 days earlier, on average, than they were 100 years ago.
Author quotes
“It was shocking to find this. What we can see is clearly pointing in the direction that climate change is having a significant effect on the behavior of birds.
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Monitoring global carbon emissions in 2021
Study key findings & significance
- Following record-level declines in 2020, near-real-time data indicate that global CO2 emissions rebounded by 4.8% in 2021, reaching 34.9 GtCO2.
- These 2021 emissions consumed 8.7% of the remaining carbon budget for limiting anthropogenic warming to 1.5 °C, which if current trajectories continue, might be used up in 9.5 years at 67% likelihood.
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The simplest of climate models run decades ago accurately projected global warming
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Evaluating the performance of past climate model projections
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