Drifting-snow statistics from multiple-year autonomous measurements in Adélie Land, East Antarctica
Drifting-snow statistics from multiple-year autonomous measurements in Adélie Land, East Antarctica
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DOI：
10.5194/tc-14-1713-2020
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发表时间：
2020-05
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影响因子：
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通讯作者：
C. Amory
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文献类型：
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作者：
C. Amory
抽象的。飘雪是南极冰盖上的一个普遍现象，因此通过建模和卫星方法研究了其在大陆范围内的气候和水文意义。虽然需要实地测量来评价和解释模型和卫星产品，但南极洲的大多数流雪观测活动都涉及在一个地点和短时间内收集的数据。为了获得与南极条件下的飘雪观测和建模相关的新数据，2010年1月，在阿德利地（东南极洲）海岸相距100公里的两个偏远地点安装了气象和第二代IAV工程声学FlowCapt™传感器。迄今为止，几乎连续提供的数据构成了南极大陆目前可用的最长的自主近地表（即2米以内）积雪测量数据集。本文介绍了一个评估的漂流雪发生和雪质量运输长达9年（2010-2018）的半小时观测记录收集在南极地区最容易通过风雪运输之一。该数据集免费提供给科学界，可用于补充卫星产品，并以高时间频率评估接近地面的雪输送模型。
Abstract. Drifting snow is a widespread feature over the Antarctic ice sheet, whose climatological and hydrological significance at the continental scale have been consequently investigated through modelling and satellite approaches. While field measurements are needed to evaluate and interpret model and satellite products, most drifting-snow observation campaigns in Antarctica involved data collected at a single location and over short time periods. With the aim of acquiring new data relevant to the observation and modelling of drifting snow in Antarctic conditions, two remote locations in coastal Adélie Land (East Antarctica) that are 100 km apart were instrumented in January 2010 with meteorological and second-generation IAV Engineering acoustic FlowCapt™ sensors. The data, provided nearly continuously so far, constitute the longest dataset of autonomous near-surface (i.e. within 2 m) measurements of drifting snow currently available over the Antarctic continent. This paper presents an assessment of drifting-snow occurrences and snow mass transport from up to 9 years (2010–2018) of half-hourly observational records collected in one of the Antarctic regions most prone to snow transport by wind. The dataset is freely available to the scientific community and can be used to complement satellite products and evaluate snow-transport models close to the surface and at high temporal frequency.