Amplified seasonality in western Europe in a warmer world

Documenting the seasonal temperature cycle constitutes an essential step toward mitigating risks associated with extreme weather events in a future warmer world. The mid-Piacenzian Warm Period (mPWP), 3.3 to 3.0 million years ago, featured global temperatures approximately 3°C above preindustrial levels. It represents an ideal period for directed paleoclimate reconstructions equivalent to model projections for 2100 under moderate Shared Socioeconomic Pathway SSP2-4.5. Here, seasonal clumped isotope analyses of fossil mollusk shells from the North Sea are presented to test Pliocene Model Intercomparison Project 2 outcomes. Joint data and model evidence reveals enhanced summer warming (+4.3° ± 1.0°C) compared to winter (+2.5° ± 1.5°C) during the mPWP, equivalent to SSP2-4.5 outcomes for future climate. We show that Arctic amplification of global warming weakens mid-latitude summer circulation while intensifying seasonal contrast in temperature and precipitation, leading to an increased risk of summer heat waves and other extreme weather events in Europe’s future.

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Bibliographic Details
Main Authors: de Winter, Niels J., Tindall, Julia, Johnson, Andrew L.A., Goudsmit-Harzevoort, Barbara, Wichern, Nina, Kaskes, Pim, Claeys, Philippe, Huygen, Fynn, van Leeuwen, Sonja, Metcalfe, Brett, Bakker, Pepijn, Goolaerts, Stijn, Wesselingh, Frank, Ziegler, Martin
Format: Article/Letter to editor biblioteca
Language:English
Subjects:Life Science,
Online Access:https://research.wur.nl/en/publications/amplified-seasonality-in-western-europe-in-a-warmer-world
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