The Transient Response of Ice Shelf Melting to Ocean Change
The Transient Response of Ice Shelf Melting to Ocean Change
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DOI：
10.1175/jpo-d-17-0071.1
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发表时间：
2017-08-01
影响因子：
3.5
通讯作者：
Holland, Paul R.
中科院分区：
文献类型：
--
作者：
Holland, Paul R.
理想化模型研究表明，冰架的融化是海洋温度的二次函数。然而，这一结果是平衡响应，来自于受到固定海洋强迫的稳定冰-海洋模拟。本研究认为，而不是熔化的瞬态响应，使用非定常模拟强迫条件下，振荡的周期范围。结果表明，水在冰下空腔中的停留时间提供了一个临界时间尺度。当强迫变化缓慢时（振荡周期>>停留时间），空腔在周期的所有阶段都被强迫异常完全冲洗，融化遵循平衡响应。当强迫迅速变化时（周期
Idealized modeling studies have shown that the melting of ice shelves varies as a quadratic function of ocean temperature. However, this result is the equilibrium response, derived from steady ice-ocean simulations subjected to a fixed ocean forcing. This study considers instead the transient response of melting, using unsteady simulations subjected to forcing conditions that are oscillated with a range of periods. The results show that the residence time of water in the subice cavity offers a critical time scale. When the forcing varies slowly (period of oscillation >> residence time), the cavity is fully flushed with forcing anomalies at all stages of the cycle and melting follows the equilibrium response. When the forcing varies rapidly (period