Utilizing CryoSat-2 sea ice thickness to initialize a coupled ice-ocean modeling system
Utilizing CryoSat-2 sea ice thickness to initialize a coupled ice-ocean modeling system
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DOI：
10.1016/j.asr.2017.12.030
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发表时间：
2018-09-15
影响因子：
2.6
通讯作者：
Wallcraft, Alan J.
中科院分区：
文献类型：
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作者：
Allard, Richard A.;Farrell, Sinead L.;Wallcraft, Alan J.
使用独立算法导出的两个 CryoSat-2 海冰厚度产品来初始化耦合的冰海建模系统，在该系统中对 2014 年 3 月 15 日至 2015 年 9 月 30 日期间进行了一系列再分析研究。与系泊上视声纳、流冰质量平衡浮标和 NASA 冰桥行动冰厚度数据的比较表明，与没有这些数据的运行模型相比，使用卫星导出的冰厚度数据的建模系统表现出大大减少的偏差数据。使用 CryoSat-2 冰厚度初始化的模型展示了从初始阶段到长达 6 个月的冰厚度模拟能力。我们发现冰厚度的最大改善发生在多年冰上。根据此处检查的数据周期，我们发现，在 18 个月的研究周期中，与上视声纳测量相比，CryoSat-2 重新分析显示，与没有这些数据的对照运行（分别为 1.44 和 1.60）相比，偏差 (0.47-0.75) 和 RMSE (0.89-1.04) 显着改善。冰漂流比较显示，泛北极地区的冰速度统计数据几乎没有变化；然而，2014 年夏季/秋季，白令海/波弗特海/楚科奇海和格陵兰海/挪威海的情况有所改善。这些有希望的结果表明，应该使用这种技术来重新初始化可操作的海冰建模系统。由 Elsevier Ltd 代表 COSPAR 发布。
Two CryoSat-2 sea ice thickness products derived with independent algorithms are used to initialize a coupled ice-ocean modeling system in which a series of reanalysis studies are performed for the period of March 15, 2014 September 30, 2015. Comparisons against moored upward looking sonar, drifting ice mass balance buoy, and NASA Operation IceBridge ice thickness data show that the modeling system exhibits greatly reduced bias using the satellite-derived ice thickness data versus the operational model run without these data. The model initialized with CryoSat-2 ice thickness exhibits skill in simulating ice thickness from the initial period to up to 6 months. We find that the largest improvements in ice thickness occur over multi-year ice. Based on the data periods examined here, we find that for the 18-month study period, when compared with upward looking sonar measurements, the CryoSat-2 reanalyses show significant improvement in bias (0.47-0.75) and RMSE (0.89-1.04) versus the control run without these data (1.44 and 1.60, respectively). An ice drift comparison reveals little change in ice velocity statistics for the Pan Arctic region; however some improvement is seen during the summer/autumn months in 2014 for the Bering/Beaufort/Chukchi and Greenland/Norwegian Seas. These promising results suggest that such a technique should be used to reinitialize operational sea ice modeling systems. Published by Elsevier Ltd on behalf of COSPAR.