Thielke Linda, Huntemann Marcus, Hendricks Stefan, Jutila Arttu, Ricker Robert, Spreen Gunnar
University of Bremen, Institute of Environmental Physics, Bremen, 28359, Germany.
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany.
Sci Data. 2022 Jun 25;9(1):364. doi: 10.1038/s41597-022-01461-9.
The sea ice surface temperature is important to understand the Arctic winter heat budget. We conducted 35 helicopter flights with an infrared camera in winter 2019/2020 during the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. The flights were performed from a local, 5 to 10 km scale up to a regional, 20 to 40 km scale. The infrared camera recorded thermal infrared brightness temperatures, which we converted to surface temperatures. More than 150000 images from all flights can be investigated individually. As an advanced data product, we created surface temperature maps for every flight with a 1 m resolution. We corrected image gradients, applied an ice drift correction, georeferenced all pixels, and corrected the surface temperature by its natural temporal drift, which results in time-fixed surface temperature maps for a consistent analysis of one flight. The temporal and spatial variability of sea ice characteristics is an important contribution to an increased understanding of the Arctic heat budget and, in particular, for the validation of satellite products.
海冰表面温度对于理解北极冬季热量收支至关重要。在2019/2020年冬季北极气候多学科漂流观测站（MOSAiC）考察期间，我们使用红外相机进行了35次直升机飞行。飞行范围从局部的5至10公里尺度到区域的20至40公里尺度。红外相机记录了热红外亮度温度，我们将其转换为表面温度。来自所有飞行的超过150000张图像均可单独研究。作为一种高级数据产品，我们为每次飞行创建了分辨率为1米的表面温度图。我们校正了图像梯度，应用了冰漂移校正，对所有像素进行了地理配准，并通过其自然时间漂移校正了表面温度，从而得到了用于对一次飞行进行一致分析的时间固定表面温度图。海冰特征的时空变异性对于增进对北极热量收支的理解，特别是对于卫星产品的验证，具有重要意义。
