The accuracy of sea-ice motion products provided by the National Snow and Ice Data Center (NSIDC) and the Ocean and Sea Ice Satellite Application Facility (OSI-SAF) was validated with data collected by ice drifters that were deployed in the western Arctic Ocean in 2014 and 2016. Data from both NSIDC and OSI-SAF products exhibited statistically significant (p < 0.001) correlation with drifter data. The OSI-SAF product tended to overestimate ice speed, while underestimation was demonstrated for the NSIDC product, especially for the melt season and the marginal ice zone. Monthly Lagrangian trajectories of ice floes were reconstructed using the products. Larger spatial variability in the deviation between NSIDC and drifter trajectories was observed than that of OSI-SAF, and seasonal variability in the deviation for NSIDC was observed. Furthermore, trajectories reconstructed using the NSIDC product were sensitive to variations in sea-ice concentration. The feasibility of using remote-sensing products to characterize sea-ice deformation was assessed by evaluating the distance between two arbitrary positions as estimated by the products. Compared with the OSI-SAF product, relative errors are lower (<11.6%), and spatial-temporal resolutions are higher in the NSIDC product, which makes it more suitable for estimating sea-ice deformation.

中文翻译：

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海冰运动遥感产品的验证：以北冰洋西部为例

国家冰雪数据中心 (NSIDC) 和海洋和海冰卫星应用设施 (OSI-SAF) 提供的海冰运动产品的准确性通过部署在北冰洋西部的冰漂船收集的数据进行了验证在 2014 年和 2016 年。来自 NSIDC 和 OSI-SAF 产品的数据均表现出统计学意义（p< 0.001) 与漂移数据的相关性。OSI-SAF 产品倾向于高估冰速，而 NSIDC 产品则低估了冰速，特别是在融化季节和边缘冰区。使用这些产品重建了每月的浮冰拉格朗日轨迹。观察到 NSIDC 和漂流者轨迹之间偏差的空间变异性大于 OSI-SAF，并且观察到 NSIDC 偏差的季节性变化。此外，使用 NSIDC 产品重建的轨迹对海冰浓度的变化很敏感。通过评估产品估计的两个任意位置之间的距离，评估了使用遥感产品表征海冰变形的可行性。与 OSI-SAF 产品相比，相对误差更低（<