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Common Warming Pattern Emerges Irrespective of Forcing Location
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2017
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Source: Journal of Advances in Modeling Earth Systems 9(6), 2413-2426, 2017
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Journal Title:Journal of Advances in Modeling Earth Systems
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Description:The Earth's climate is changing due to the existence of multiple radiative forcing agents. It is under question whether different forcing agents perturb the global climate in a distinct way. Previous studies have demonstrated the existence of similar climate response patterns in response to aerosol and greenhouse gas (GHG) forcings. In this study, the sensitivity of tropospheric temperature response patterns to surface heating distributions is assessed by forcing an atmospheric general circulation model coupled to an aquaplanet slab ocean with a wide range of possible forcing patterns. We show that a common climate pattern emerges in response to localized forcing at different locations. This pattern, characterized by enhanced warming in the tropical upper troposphere and the polar lower troposphere, resembles the historical trends from observations and models as well as the future projections. Atmospheric dynamics in combination with thermodynamic air-sea coupling are primarily responsible for shaping this pattern. Identifying this common pattern strengthens our confidence in the projected response to GHG and aerosols in complex climate models.
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Source:Journal of Advances in Modeling Earth Systems 9(6), 2413-2426, 2017
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Rights Information:CC BY-NC-ND
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Compliance:PMC
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