Abstract
Short-wavelength (15–150 km) ocean phenomena are difficult to be observed by conventional altimeter due to the sampling method limited the resolution of the data. It is, therefore, the future wide-swath interferometric altimetry (WIA) missions like “SWOT” and “Guanlan” are designed to observe these phenomena. However, observing the short-wavelength dynamic process of the high eddy kinetic energy (EKE) region is still a challenge. The short-wavelength validation of WIA is also an urgent problem to be solved. In-situ observation platforms array can provide data set with high spatial and temporal resolution, which can capture short-wavelength dynamic process and validate the altimeter data. Simulation is a key to verify the feasibility of the observation strategy. In this article, we carried out simulated observation experiments based on high spatial-temporal resolution numerical models and introduced motion model of mooring and keep-station glider to improve the accuracy of in-situ observation simulation under the influence of the dynamic ocean currents which optimized by deep learning methods. In this experiment, the steric height, reconstructed by different observation array strategies, and the sea surface height of the measured positions are compared based on wavenumber spectrum. We tested the performance of the mooring array, station-keeping glider array, mooring and wave-energy profiling buoy (M&WPB) combination array, and multidevice array. The results show that the glider and M&WPB arrays have better performance of strong current regions. It could be helpful for the observation of dynamic processes in high EKE regions and has potential application for the validation of WIA.
Highlights
OCEANIC processes of short-wavelength range (15-150k m) crucially affecting the ocean physics and ecology up to the climate scale, because of the strong gradients in ocean properties created by their energetic dynamics [1]
It should be noted that the experiments were carried in the high eddy kinetic energy (EKE) region, and even if the correlation between reconstructed SH and sea surface height (SSH) reached more than 99 percent and the error-to-signal ratio was low, the PSD value was still higher than the Surface Water Ocean Topography (SWOT) baseline requirements when the wavelengths above 50km
In-situ observation as a supplement to make up for Wide-swath interferometric altimetry (WIA)'s inability to capture the dynamic process in the short wavelength range below 30 km in the high EKE region, which could be helpful for the small-scale dynamic process observation
Summary
OCEANIC processes of short-wavelength range (15-150k m) crucially affecting the ocean physics and ecology up to the climate scale, because of the strong gradients in ocean properties created by their energetic dynamics [1]. The one-dimensional profiles sea surface height (SSH) data onto conventional altimeter cannot capture dynamic process below 150km wavelength scale due to the limitation of resolution [2]. In-situ observation may be the solution to th ese problems It can provide surface and subsurface data with high spatial and temporal resolution as the complementary data sets [10] for altimeter as well as independently used in various fields of oceanic research [11,12,13,14], including the study of ocean dynamic processes and the validation of satellite data. The results showed that the mooring observation array could meet the requirements of the mission and the station-keeping glider observation array have high potential Both experiment sites were located in the low EKE region with low flow velocity.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
