InitMIP-Antarctica experiments with the ice sheet model SICOPOLIS
InitMIP-Antarctica experiments with the ice sheet model SICOPOLIS
复制标题
InitMIP-南极洲使用冰盖模型 SICOPOLIS 进行实验
DOI：
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
E. Wolff
中科院分区：
文献类型：
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作者：
R. Greve;B. Galton;立、Wolff E.W;S. Fujita;F. Parrenin;A. Abe‐Ouchi;K. Kawamura;V. Masson‐Delmotte;H. Motoyama;F. Saito;M. Severi;B. Stenni;R. Uemura;E. Wolff
CMIP6 冰盖模型比对项目 (ISMIP6) 汇集了国际冰盖和气候模型联盟，以探索格陵兰岛和南极冰盖对未来海平面上升的贡献。对于此类预测，需要进行初始化以提供相应冰盖的初始状态。 InitMIP-Antarctica 是 ISMIP6 内的一项早期计划，旨在通过各种模型和初始化技术探索南极冰盖的这一问题。我们为 InitMIP-Antarctica 提供了冰盖模型 SICOPOLIS 和自旋型初始化，即迄今为止超过 135 ka 的古气候模拟。该模型的一个主要新组成部分是冰架基底融化的基于物理的参数化。在此参数化中，冰架的基础融化被计算为平均海平面以下冰的深度和远场海洋温度的函数。对八个南极区域的参数化进行了不同的调整，以便与冰架基底融化的现代空间分布达到合理的一致。 InitMIP-南极洲还包括三种未来气候情景，全部运行超过 100 a：ctrl（当前气候）、asmb（规定的表面质量平衡异常示意图）和 amb（冰架下规定的基底融化异常示意图）。我们根据模拟和观察到的当前几何形状和流动之间的一致性来展示和讨论自旋的性能。此外，我们研究了南极冰盖对三种未来气候情景的响应。
The Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6) brings together a consortium of international ice sheet and climate models to explore the contribution from the Greenland and Antarctic ice sheets to future sea level rise. For such projections, initialisations are required that provide initial states of the respective ice sheet. InitMIP-Antarctica is an early initiative within ISMIP6 in order to explore this issue for the Antarctic ice sheet across a variety of models and initialisation techniques. We contribute to InitMIP-Antarctica with the ice sheet model SICOPOLIS and a spin-up-type initialisation, that is, a paleoclimatic simulation over 135 ka until the present. A major new component of the model is a physically-based parameterisation of ice shelf basal melting. In this parameterisation, basal melting of ice shelves is computed as a function of both the depth of ice below mean sea level and far-field ocean temperatures. The parameterisation is tuned differently for eight Antarctic sectors in order to achieve reasonable agreement with the modern spatial distribution of ice shelf basal melting. InitMIP-Antarctica also comprises three future climate scenarios, all to be run over 100 a: ctrl (present-day climate), asmb (prescribed schematic surface mass balance anomaly) and abmb (prescribed schematic basal melting anomaly under ice shelves). We present and discuss the performance of the spin-up in terms of agreement between simulated and observed present-day geometry and flow. Further, we investigate the response of the Antarctic ice sheet to the three future climate scenarios.
initMIP-Antarctica：ISMIP6的冰盖模型初始化实验
DOI：
10.5194/tc-13-1441-2019
发表时间：
2019
期刊：
The Cryosphere
影响因子：
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作者：
Seroussi H
通讯作者：
Seroussi H