Improving Antarctic tide models by assimilation of ICESat laser altimetry over ice shelves
Improving Antarctic tide models by assimilation of ICESat laser altimetry over ice shelves
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DOI：
10.1029/2008gl035592
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发表时间：
2008-11-22
影响因子：
5.2
通讯作者：
Fricker, Helen Amanda
中科院分区：
文献类型：
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作者：
Padman, Laurie;Erofeeva, Svetlana Y.;Fricker, Helen Amanda
同化来自冰、云和陆地高程卫星（ICESat）的激光高度计数据，显著提高了罗斯冰架（RIS）海潮模型的准确性。对于最有活力的潮汐谐波，K-1，同化减少了均方根误差（RMSE）之间的模型和一组16个独立的潮汐记录和附近的RIS从6.0到2.8厘米，和合并RMSE为6个最有活力的潮汐谐波从7.7到5.4厘米。当只考虑6个最近和最高质量的潮汐记录时，组合RMSE为4.8 cm。该值接近短期（类似于1-2个月）验证记录潮汐分析的预期不确定性，表明评估潮汐模型准确性的进一步改进将需要开发更高质量的验证数据集。引文：Padman，L.，S. Y. Erofeeva和H. A. Fricker（2008年），通过同化ICESat在冰架上的激光测高改进南极潮汐模型，Geophys。保留信函：35，L22504，doi：10.1029/2008GL035592。
Assimilation of laser altimeter data from the Ice, Cloud and land Elevation Satellite (ICESat) significantly improves the accuracy of ocean tide models for the Ross Ice Shelf (RIS). For the most energetic tidal harmonic, K-1, assimilation reduces the root-mean-square error (RMSE) between the model and a set of 16 independent tide records on and near the RIS from 6.0 to 2.8 cm, and the combined RMSE for the six most energetic tidal harmonics from 7.7 to 5.4 cm. When only the six most recent and highest-quality tide records are considered, the combined RMSE is 4.8 cm. This value is close to the uncertainty expected from tidal analyses of the short (similar to 1-2 month) validation records, indicating that assessing further improvements in tide model accuracy will require development of a higher quality validation data set. Citation: Padman, L., S. Y. Erofeeva, and H. A. Fricker (2008), Improving Antarctic tide models by assimilation of ICESat laser altimetry over ice shelves, Geophys. Res. Lett., 35, L22504, doi:10.1029/2008GL035592.