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来自ICESat-2的整个季节北极海冰厚的初步评估
Alek Petty1, Alex Cabaj2, Jack C Landy3
1Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA.
这项研究验证了ICESat-2的全季北极海冰厚度,与CryoSat-2和泊位数据有很好的一致性. 结果支持可靠的ICESat-2海冰厚记录的可能性.
科学领域:
- * * 冰层科学 冰层科学
- * 极地地区的遥感.
- * 气候变化监测监测
背景情况:
- * 准确的北极海冰厚度对于气候建模和了解极地动态至关重要.
- *像ICESat-2和CryoSat-2这样的卫星高度测量任务为海冰监测提供了必要的数据.
- * 估计海冰厚度需要准确的雪积累数据,这可能带来不确定性.
研究的目的:
- * 评估来自ICESat-2卫星的全季北极海冰厚估计.
- * 为了将ICESat-2厚度数据与CryoSat-2估计值进行比较,并根据现场测量进行验证.
- * 评估雪荷载模型的性能,并与高度测量数据结合使用.
主要方法:
- *利用ICESat-2自由板检索数据与SnowModel-LG全季雪量数据相结合.
- * ICESat-2厚度估计与CryoSat-2数据进行比较,并与向上的声纳,IceBird-2019和MOSAiC浮标数据进行验证.
- * 评估了SnowModel-LG和NESOSIM积雪模型的性能.
主要成果:
- * ICESat-2捕捉了关键的区域和季节性北极海冰变化,与CryoSat-2非常一致.
- *在ICESat-2和CryoSat-2之间观察到明显的差异,特别是在北极沿海地区,与冬季厚度偏差有关.
- * 验证显示强的表现,但突出了与雪负载和冰密度假设有关的持续季节性偏差.
结论:
- *这项研究支持了来自ICESat-2的全季北极海冰厚记录的可行性.
- *建议进行进一步的研究,以便将双高度测量雪深评估延伸到夏季.
- * 持续验证和完善雪负载模型对于改善厚度估计至关重要.
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