Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL092119 |
Spatiotemporal Variations in Surface Heat Loss Imply a Heterogeneous Mantle Cooling History | |
Krister S. Karlsen; Clinton P. Conrad; Mathew Domeier; Reidar G. Trø; nnes | |
2021-02-24 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Earth's heat budget is strongly influenced by spatial and temporal variations in surface heat flow caused by plate tectonic cycles. Here we use a novel set of paleo‐seafloor age grids extending back to the mid‐Paleozoic to infer spatiotemporal variations in surface heat loss. The time‐averaged oceanic heat flow is 36.6 TW, or ∼25% greater than present‐day. Our thermal budget for the mantle indicates that 149 K/Gyr of cooling occurred over this period, consistent with geochemical estimates of mantle cooling for the past 1 Gyr. Our analysis also suggests sustained rapid cooling of the Pacific mantle hemisphere, which may have cooled ∼50 K more than its African counterpart since 400 Ma. The extra heat released from the Pacific mantle may have been trapped there by the earlier long‐lived supercontinent Rodinia (∼1.1‐0.7 Ga), and the Pacific mantle may still be hotter than the African mantle today. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/315845 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Krister S. Karlsen,Clinton P. Conrad,Mathew Domeier,et al. Spatiotemporal Variations in Surface Heat Loss Imply a Heterogeneous Mantle Cooling History[J]. Geophysical Research Letters,2021. |
APA | Krister S. Karlsen,Clinton P. Conrad,Mathew Domeier,Reidar G. Trø,&nnes.(2021).Spatiotemporal Variations in Surface Heat Loss Imply a Heterogeneous Mantle Cooling History.Geophysical Research Letters. |
MLA | Krister S. Karlsen,et al."Spatiotemporal Variations in Surface Heat Loss Imply a Heterogeneous Mantle Cooling History".Geophysical Research Letters (2021). |
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