Estimation of the sea surface height anomaly south of Japan from Pressure-recording inverted echo sounders and its comparison with the satellite altimeter
-
Graphical Abstract
-
Abstract
The pressure-recording inversion echo (PIES) could measure round-trip acoustic travel time from the sea floor to the sea surface (τ) and bottom pressure (Pbot), the τ and Pbot measurements are used to estimate the baroclinic and barotropic components of sea level height anomaly, respectively. In this paper, the estimate of baroclinic and barotropic components of sea level height anomalies is performed for 10 PIES in the sea area south of Japan. Secondly, we compared the along-track and gridded sea level anomaly (SLA) of the satellite altimeter with the sea surface height anomaly estimated by six PIES in the Kuroshio area south of Japan, and the results of the comparison reveal a high correlation coefficient (0.81). The barotropic component of the PIES estimation is smaller than the baroclinic component. The addition of the barotropic component has a certain improvement on the comparison results of the satellite altimeter and PIES. The station with highest fluctuations of sea level height anomalies (<20 d) are consistent with station with lowest correlation coefficients.
-
-
DownLoad: