An enhancement of the NASA Team sea ice algorithm
An enhancement of the NASA Team sea ice algorithm
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DOI：
10.1109/36.843033
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发表时间：
2000-05-01
影响因子：
8.2
通讯作者：
Cavalieri, DJ
中科院分区：
文献类型：
--
作者：
Markus, T;Cavalieri, DJ
NASA 团队海冰浓度算法的增强克服了与表面雪效应相关的低冰浓度偏差问题，这一问题在南大洋海冰检索中尤为明显。该算法具有与 NASA Team 算法相同的功能形式，但使用更广泛的频率范围 (19-85 GHz)。它通过使用原始 NASA 团队算法中的辐射率来适应冰温变化，并具有通过利用前向大气辐射传输模型提供天气校正海冰浓度的额外优势。使用这种新算法对北极和南极的海火浓度进行检索并没有揭示 NASA 团队或 Bootstrap 算法中存在的缺陷。此外，与红外 AVHRR 数据的定量比较表明，增强算法提供了更准确的冰浓度，且偏差比其他两种算法小得多。
An enhancement of the NASA Team sea ice concentration algorithm overcomes the problem of a low ice concentration bias associated with surface snow effects that are particularly apparent in Southern Ocean sea ice retrievals. The algorithm has the same functional form as the NASA Team algorithm, but uses a wider range of frequencies (19-85 GHz). It accommodates ice temperature variability through the use of radiance ratios as in the original NASA Team algorithm, and has the added advantage of providing weather-corrected sea ice concentrations through the utilization of a forward atmospheric radiative transfer model, Retrievals of sea ire concentration with this new algorithm for both the Arctic and Antarctic do not reveal the deficiencies present in either the NASA Team or Bootstrap algorithms. Furthermore, quantitative comparisons with infrared AVHRR data show that the enhanced algorithm provides more accurate ice concentrations with much less bias than the other two algorithms.