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首页> 外文期刊>Journal of geophysical research. Earth Surface: JGR >Investigation of land ice-ocean interaction with a fully coupled ice-ocean model: 1. Model description and behavior
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Investigation of land ice-ocean interaction with a fully coupled ice-ocean model: 1. Model description and behavior

机译：利用完全耦合的冰海模型研究陆地冰海相互作用：1.模型描述和行为

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摘要

Antarctic ice shelves interact closely with the ocean cavities beneath them, with ice shelf geometry influencing ocean cavity circulation, and heat from the ocean driving changes in the ice shelves, as well as the grounded ice streams that feed them. We present a new coupled model of an ice stream-ice shelf-ocean system that is used to study this interaction. The model is capable of representing a moving grounding line and dynamically responding ocean circulation within the ice shelf cavity. Idealized experiments designed to investigate the response of the coupled system to instantaneous increases in ocean temperature show ice-ocean system responses on multiple timescales. Melt rates and ice shelf basal slopes near the grounding line adjust in 1-2 years, and downstream advection of the resulting ice shelf thinning takes place on decadal timescales. Retreat of the grounding line and adjustment of grounded ice takes place on a much longer timescale, and the system takes several centuries to reach a new steady state. During this slow retreat, and in the absence of either an upward-or downward-sloping bed or long-term trends in ocean heat content, the ice shelf and melt rates maintain a characteristic pattern relative to the grounding line.
机译：南极冰架与它们下面的海腔紧密相互作用，冰架的几何形状影响着海洋腔的循环，而来自海洋的热量推动了冰架的变化，以及为它们提供食物的地面冰流。我们提出了一种用于研究这种相互作用的冰流-冰架-海洋系统的新耦合模型。该模型能够表示一条移动的接地线并动态响应冰架腔内的海洋循环。旨在研究耦合系统对海洋温度瞬时升高的响应的理想化实验表明，冰海系统在多个时间尺度上都有响应。接地线附近的融化速率和冰架基础坡度在1-2年内会发生变化，并且导致的冰架变薄的下游对流发生在十年时间尺度上。撤回接地线和调整冰的结冰需要更长的时间，并且系统需要几个世纪的时间才能达到新的稳定状态。在这种缓慢的撤退过程中，在没有向上或向下倾斜的床层或海洋热量含量的长期趋势的情况下，冰架和融化速率相对于接地线保持了特征性模式。

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