CryoSat-2 Significant Wave Height in Polar Oceans Derived Using a Semi-Analytical Model of Synthetic Aperture Radar 2011-2019
CryoSat-2 Significant Wave Height in Polar Oceans Derived Using a Semi-Analytical Model of Synthetic Aperture Radar 2011-2019
复制标题
DOI：
10.3390/rs13204166
复制
发表时间：
2021-10-01
期刊：
影响因子：
5
通讯作者：
Landy, Jack
中科院分区：
文献类型：
--
作者：
Heorton, Harold;Tsamados, Michel;Landy, Jack
本文记录了利用CryoSat-2卫星数据反演北冰洋重要海面波高的情况。我们对理想的合成孔径卫星雷达或脉冲受限雷达高度计回波功率使用半解析模型。我们开发了一种处理方法，专门考虑在北冰洋内靠近海冰边缘变化的雷达的合成孔径模式和脉冲限制模式。到目前为止，所有CryoSat-2回波都与我们在2011-2019年期间理想的回波揭示波高相匹配。我们的反演数据与现有的CryoSat-2数据和波浪模型数据的处理进行了对比，表明半解析回波功率模型和新开发的处理方法的保真度和精度都有所提高。我们将我们的数据与现场的波浪浮标测量进行了对比，显示出在季节性海冰覆盖的海洋中数据提取的改进。我们已经表明了在北冰洋直接考虑正确的卫星运行模式的重要性，因为在北冰洋，合成孔径雷达是主要的运行模式。我们的新数据特别用于海冰边缘附近的波浪模型验证，并可在数据可用性声明中的链接上获得。
This paper documents the retrieval of significant ocean surface wave heights in the Arctic Ocean from CryoSat-2 data. We use a semi-analytical model for an idealised synthetic aperture satellite radar or pulse-limited radar altimeter echo power. We develop a processing methodology that specifically considers both the Synthetic Aperture and Pulse Limited modes of the radar that change close to the sea ice edge within the Arctic Ocean. All CryoSat-2 echoes to date were matched by our idealised echo revealing wave heights over the period 2011-2019. Our retrieved data were contrasted to existing processing of CryoSat-2 data and wave model data, showing the improved fidelity and accuracy of the semi-analytical echo power model and the newly developed processing methods. We contrasted our data to in situ wave buoy measurements, showing improved data retrievals in seasonal sea ice covered seas. We have shown the importance of directly considering the correct satellite mode of operation in the Arctic Ocean where SAR is the dominant operating mode. Our new data are of specific use for wave model validation close to the sea ice edge and is available at the link in the data availability statement.