BULETIN FISIKA
Vol. 27 No. 2 (2026): BULETIN FISIKA

Verification of InaCAWO Model Surface Ocean Currents Based on HF Radar Data in the Labuan Bajo Waters

Panji Kuswanaji (Sekolah Tinggi Meteorologi Klimatologi dan Geofisika)
Aries Kristianto (State College of Meteorology Climatology and Geophysics)



Article Info

Publish Date
16 Aug 2026

Abstract

Labuan Bajo waters are a strategic maritime region with intensive tourism and marine transportation activities, making surface current information essential for maritime safety. This study aims to verify surface ocean current outputs from the InaCAWO model using HF Radar observations in Labuan Bajo as reference data. The study used surface current zonal (u) and meridional (v) components from InaCAWO and HF Radar for the period 1 December 2024 to 31 May 2025. Spatial resolution differences between the two datasets were adjusted using Natural Neighbor Interpolation, by interpolating HF Radar data onto the InaCAWO model grid. Model verification was conducted using statistical indicators, including Bias, Mean Absolute Error (MAE), Root Mean Square Error (RMSE), and Willmott Index, and supported by analyses of mean surface current, time series, scatterplots, and monthly spatial distributions of current components. The results show that InaCAWO is able to represent the general pattern of surface currents in Labuan Bajo waters, but tends to produce lower current magnitudes than HF Radar observations. The time series comparison shows a bias of -0.34 knot, an RMSE of 0.41 knot, and a correlation of 0.25, indicating a weak temporal relationship and an underestimation tendency. Verification of u and v components shows spatially and temporally varying errors, with greater uncertainty in the meridional component. Therefore, InaCAWO can serve as an initial representation of surface current conditions, but further evaluation is needed to improve its accuracy in capturing local current dynamics.

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Journal Info

Abbrev

buletinfisika

Publisher

Subject

Astronomy Energy Materials Science & Nanotechnology Medicine & Pharmacology Physics

Description

Aims and Scope Aims The Journal aims to promote the theory and application in the field of physics and to encourage a vigorous dialogue among scholars and researchers worldwide. It presents original research articles, letters, and review articles, and publishes the latest achievements and ...