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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Stable Isotope Clues to the Formation and Evolution of Refrozen Melt Ponds on Arctic Sea Ice
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Stable Isotope Clues to the Formation and Evolution of Refrozen Melt Ponds on Arctic Sea Ice

机译：稳定的同位素线索在北极海冰上的Refrozen Melt Ponds的形成和演变

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摘要

Sea ice is one of the determining parameters of the climate system. The presence of melt ponds on the surface of Arctic sea ice plays a critical role in the mass balance of sea ice. A total of nine cores was collected from multiyear ice refrozen melt ponds and adjacent hummocks during the 2015 Arctic Sea State research cruise. The depth profiles of water isotopes, salinity, and ice texture for these sea ice cores were examined to provide information about the development of refrozen melt ponds and water balance generation processes, which are otherwise difficult to acquire. The presence of meteoric water with low oxygen isotope values as relatively thin layers indicates melt pond water stability and little mixing during formation and refreezing. The hydrochemical characteristics of refrozen melt pond and seawater depth profiles indicate little snowmelt enters the upper ocean during melt pond refreezing. Due to the seasonal characters of deuterium excess for Arctic precipitation, water balance calculations utilizing two isotopic tracers (oxygen isotope and deuterium excess) suggest that besides the melt of snow cover, the precipitation input in the melt season may also play a role in the evolution of melt ponds. The dual-isotope mixing model developed here may become more valuable in a future scenario of increasing Arctic precipitation. The layers of meteoric origin were found at different depths in the refrozen melt pond ice cores. Surface topography information collected at several core sites was examined for possible explanations of different structures of refrozen melt ponds.
机译：海冰是气候系统的确定参数之一。北极海冰表面的熔体池在海冰的质量平衡中起着关键作用。在2015年北极海州研究巡航期间，共收集来自多元冰Refrozen Melt Ponds和邻近的小丘的九个核心。对这些海冰核心的水同位素，盐度和冰纹理的深度谱进行了检查，以提供有关Refrozen Melt Ponds和水平衡发电过程的发展的信息，否则难以获得。作为相对薄层的低氧同位素值的血液水的存在表明熔体池水稳定性和在形成期间的混合很少。 Refrozen Melt Pond的水化学特性和海水深度剖面表示小雪花在熔体池塘冷冻期间进入上海。由于北极降水过量的季节性特征，利用两个同位素示踪剂的水平衡计算（氧同位素和氘多）表明除了雪覆盖的熔体之外，熔体季节的降水输入也可能在演变中发挥作用融化池塘。这里开发的双同位素混合模型可能在增加北极降水的未来情景中变得更加有价值。在不同的深度在Refrozen Melt Pond冰芯中发现了杂志起源层。检查了几个核心站点收集的表面形貌信息，用于对不同结构的Refrozen Melt池塘的可能解释。

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