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• W2003314189 abstract "We use one-dimensional (1D) atmospheric models coupled to a sulfate aerosol model to investigate climate forcing and short-term response to stratospheric sulfate aerosols produced by the reaction of S-bearing gases and water vapor released in the Chicxulub impact event. A 1D radiation model is used to assess the climate forcing due to the impact-related loading of S-bearing gases. The model suggests that a climate forcing 100 times larger than that from the Pinatubo volcanic eruption is associated with the Chicxulub impact event for at least 2 years after the impact. In particular, we find a saturation effect in the forcing, that is, there is no significant difference in the maximum forcing between the highest (~300 Gt) and lowest (~30 Gt) estimated stratospheric S-loading from the Chicxulub impact. However, higher S-loads increase the overall duration of the forcing by several months. We use a single column model for a preliminary investigation of the short-term climate response to the impact-related production of sulfate aerosols (the lack of horizontal feedbacks limits the usefulness of the single column model to the first few days after the impact). Compared with the present steady-state climate, the introduction of large amounts of sulfate aerosols in the stratosphere results in a significant cooling of the Earth's surface. A long-term climate response can only be investigated with the use of a three-dimensional atmospheric model, which allows for the atmospheric circulation to adjust to the perturbation. Overall, although the climate perturbation to the forcing appears to be relatively large, the geologic record shows no sign of a significant long-term climatic shift across the K/T boundary, which is indicative of a fast post-impact climatic recovery." @default.
• W2003314189 created "2016-06-24" @default.
• W2003314189 creator A5032594445 @default.
• W2003314189 creator A5038578633 @default.
• W2003314189 creator A5056746608 @default.
• W2003314189 date "2003-03-01" @default.
• W2003314189 modified "2023-10-16" @default.
• W2003314189 title "Chicxulub and Climate: Radiative Perturbations of Impact-Produced S-Bearing Gases" @default.
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• W2003314189 doi "https://doi.org/10.1089/153110703321632453" @default.
• W2003314189 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12804368" @default.
• W2003314189 hasPublicationYear "2003" @default.
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