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首页> 外文期刊>Journal of hydrometeorology >Simulations of Snow, Ice, and Near-Surface Atmospheric Processes on Ice Station Weddell
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Simulations of Snow, Ice, and Near-Surface Atmospheric Processes on Ice Station Weddell

机译：冰站韦德尔雪，冰和近地表大气流程模拟

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The 4-month drift of Ice Station Weddell (ISW) produced over 2000 h of nearly continuous measurements in the atmospheric surface layer and in the snow and sea ice in the western Weddell Sea. This paper reports simulations, based on these data, of processes in the air, snow, and sea ice at ISW using SNTHERM, a one-dimensional mass and energy balance model. An earlier version of SNTHERM had to be adapted, however, to treat the flooding that often occurs on sea ice in the western Weddell Sea. To treat this layer of slush and brine, SNTHERM holds the brine salinity constant at its initial value of 31.5 psu until 80% of this slush layer freezes. The current version of SNTHERM also incorporates a new parameterization for the roughness length for wind speed, z0, derived from analyses of ISW eddy-covariance data. SNTHERM's simulations are validated with temperature measurements within the ice and snow and with eddy-covariance measurements of the surface momentum and sensible and latent heat fluxes. The simulated turbulent fluxes agree fairly well with the measured fluxes, except the simulated sensible heat flux is biased low by 4–5 W m?2 for both stable and unstable stratification. The simulated temperature profiles in the snow and ice also agree well with the measured temperatures. In particular, allowing seawater to flush the slush layer until it is 80% frozen delays the freezing of this layer such that its behavior mirrors the data.
机译：冰站Weddell（ISW）的4个月漂移在大气表面层和西部婚露海域的雪地和海冰中产生了2000小时的几乎连续测量。本文报告了使用SNITHMET，一维质量和能量平衡模型的空气，雪和海冰中的这些数据的模拟。然而，早期版本的SNETHER必须适应，以治疗洪水常常发生在西红德尔海的海冰中的洪水。为了处理这层脂肪和盐水，SNETHERM在其初始值为31.5psu的初始值下保持盐水盐度恒定，直到该溶解层的80％冻结。当前版本的SNETHER还包括用于风速，Z0的粗糙度长度的新参数化，源自ISW辅助协方差数据的分析。 SNETHERM的仿真通过冰和雪中的温度测量验证，以及表面动量和明智和潜热通量的涡流测量。模拟湍流通量与测量的助熔剂相当吻合得非常良好，除了模拟的明智的热通量偏置低4-5Wm≤2，用于稳定和不稳定的分层。冰雪和冰中的模拟温度曲线也与测量的温度很好。特别是，允许​​海水冲洗浸入层，直到它是80％冷冻延迟该层的冻结，使其其行为反映了数据。

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