Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094241 |
The ice core gas age-ice age difference as a proxy for surface temperature | |
Christo Buizert | |
2021-09-30 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Ice cores provide detailed records of past climate change. Water stable isotopes are the most commonly used ice core climate proxy, but their quantitative interpretation remains challenging. Here I argue that the gas age-ice age difference (Δage) is a powerful proxy for past surface temperature. An analytical framework is derived that directly links past temperature to firn properties that can be reliably reconstructed (Δage, lock-in depth). The framework is calibrated using both present-day spatial patterns and last glacial maximum temperatures reconstructed via borehole thermometry. The usefulness of the method is demonstrated using three case studies from Greenland and Antarctic ice cores. The calibration suggests that several firn densification models, with the possible exception of the Herron-Langway model, have insufficient sensitivity to accumulation rates. This low sensitivity, in combination with large amplitude temperature forcing, can explain historical difficulties of densification models in simulating ice age firn thickness in East Antarctica. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/338856 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Christo Buizert. The ice core gas age-ice age difference as a proxy for surface temperature[J]. Geophysical Research Letters,2021. |
APA | Christo Buizert.(2021).The ice core gas age-ice age difference as a proxy for surface temperature.Geophysical Research Letters. |
MLA | Christo Buizert."The ice core gas age-ice age difference as a proxy for surface temperature".Geophysical Research Letters (2021). |
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