Surface energy balance, melt and sublimation at Neumayer Station, East Antarctica
Surface energy balance, melt and sublimation at Neumayer Station, East Antarctica
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DOI：
10.1017/s0954102009990538
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发表时间：
2009-11
影响因子：
1.6
通讯作者：
M. Broeke;G. König‐Langlo;G. Picard;P. K. Munneke;J. Lenaerts
中科院分区：
文献类型：
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作者：
M. Broeke;G. König‐Langlo;G. Picard;P. K. Munneke;J. Lenaerts
摘要利用南极海岸站Neumayer连续13年的高质量逐时观测资料，建立了一个地表能量平衡模型。该模型准确地再现了观测到的表面温度。在夏季，当吸收的太阳辐射加热表面时，表面升华是显著的。在计算中包括雪堆升华的一阶估计是总升华的三倍多，除去19%的固体沉淀，表明雪堆升华对南极冰架的质量平衡可能是重要的。纽迈耶的所有夏季都有表面融化，但所有的融水都会重新冻结。在三分之二的情况下，重新冻结是准瞬时的（在6分钟的模型时间步长内），因此没有液态水留在雪中。对于所有其他事件，Neumayer积雪中液态水的出现与基于卫星的液态水探测非常一致。
Abstract A surface energy balance model is forced by 13 years of high-quality hourly observations from the Antarctic coastal station Neumayer. The model accurately reproduces observed surface temperatures. Surface sublimation is significant in summer, when absorbed solar radiation heats the surface. Including a first order estimate of snowdrift sublimation in the calculation more than triples the total sublimation, removing 19% of the solid precipitation, indicating that snowdrift sublimation is potentially important for the mass balance of Antarctic ice shelves. Surface melt occurs at Neumayer in all summers, but all the meltwater refreezes. In two-thirds of the cases, the refreezing is quasi-instantaneous (within the model timestep of 6 min), so that no liquid water remains in the snow. For all other events, the occurrence of liquid water in the snowpack at Neumayer agrees well with satellite-based liquid water detection.