印度洋中尺度涡遥感调查和验证OA

One of the fundamental structures of ocean turbulence is the presence of various scales of eddies,including numerous random small eddies which constitute a background flow and mesoscale eddies with coherent structure in the statistical sense.Focusing on the mesoscale eddies prevalent in the Indian Ocean,a remote sensing investigation and result validation of mesoscale eddies in the Indian Ocean are carried out using long-time series and spatially uniform satellite altimetry data.The results indicate that mesoscale eddies in the Indian Ocean are primarily distributed in the Antarctic Circumpolar Current region,the western waters of Australia,the Mozambique Channel in the Southern Indian Ocean,and the Arabian Sea and the Bay of Bengal in the northern Indian Ocean.In the northern Indian Ocean,due to the limitation of the spatial region,mesoscale eddies exhibit smaller lifetimes and shorter propagation distances.In contrast,in the southern Indian Ocean,there are a large number of mesoscale eddies with long lifetimes,and some of them can move across the entire southern Indian Ocean.Based on the ARGO in situ observation data and multi-observation ocean 3D reprocessing data,the remote sensing investigation results of mesoscale eddies are validated,and the remote sensing surface signals of mesoscale eddies show a good agreement with the underwater temperature signal.