Copernicus – August 2024 ties with August 2023 as the warmest Augusts recorded
2024 year to date: January – August is the warmest January – August recorded
Copernicus
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Prof Michael E. Mann - Two new studies in Nature journals lending additional support to surface warming being steady rather than accelerating. That warming will continue until carbon emissions cease. The truth is bad enough folks! https://x.com/MichaelEMann/status/1829604984767611197
2023 temperatures reflect steady global warming and internal sea surface temperature variability 2023 temperatures reflect steady global warming and internal sea surface temperature variability | Communications Earth & Environment
Abstract
2023 was the warmest year on record, influenced by multiple warm ocean basins. This has prompted speculation of an acceleration in surface warming, or a stronger than expected influence from loss of aerosol induced cooling. Here we use a recent Green’s function-based method to quantify the influence of sea surface temperature patterns on the 2023 global temperature anomaly, and compare them to previous record warm years. We show that the strong deviation from recent warming trends is consistent with previously observed sea surface temperature influences, and regional forcing. This indicates that internal variability was a strong contributor to the exceptional 2023 temperature evolution, in combination with steady anthropogenic global warming.
A Dynamically Consistent ENsemble of Temperature at the Earth surface since 1850 from the DCENT dataset A Dynamically Consistent ENsemble of Temperature at the Earth surface since 1850 from the DCENT dataset | Scientific Data
Abstract
Accurate historical records of Earth’s surface temperatures are central to climate research and policy development. Widely-used estimates based on instrumental measurements from land and sea are, however, not fully consistent at either global or regional scales. To address these challenges, we develop the Dynamically Consistent ENsemble of Temperature (DCENT), a 200-member ensemble of monthly surface temperature anomalies relative to the 1982–2014 climatology. Each DCENT member starts from 1850 and has a 5° × 5° resolution. DCENT leverages several updated or recently-developed approaches of data homogenization and bias adjustments: an optimized pairwise homogenization algorithm for identifying breakpoints in land surface air temperature records, a physics-informed inter-comparison method to adjust systematic offsets in sea-surface temperatures recorded by ships, and a coupled energy balance model to homogenize continental and marine records. Each approach was published individually, and this paper describes a combined approach and its application in developing a gridded analysis. A notable difference of DCENT relative to existing temperature estimates is a cooler baseline for 1850–1900 that implies greater historical warming.