Short-Term Variation of the Surface Flow Pattern South of Lombok Strait Observed from the Himawari-8 Sea Surface Temperature

Taniguchi, Nobuyuki; Kida, Sigeo; Sakuno, Yuji; Mutsuda, Hidemi; Syamsudin, Fadli

doi:10.3390/rs11121491

Cited by 7 publications

(9 citation statements)

References 39 publications

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“…In this way, we can determine how far the center point of the template image has moved in an hour and estimate the flow velocity. The MCC method needs to adjust the parameter selection settings for different research scopes [17][18][19]. In this study, the pixel resolution of 2 km was increased to 1 km by interpolation.…”

Section: Methodsmentioning

confidence: 99%

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Temporal Variation and Spatial Structure of the Kuroshio-Induced Submesoscale Island Vortices Observed from GCOM-C and Himawari-8 Data

Hsu

Lee

et al. 2020

Remote Sensing

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Dynamics of ocean current-induced island wake has been an important issue in global oceanography. Green Island, a small island located off southeast of Taiwan on the Kuroshio path was selected as the study area to more understand the spatial structure and temporal variation of well-organized vortices formed by the interaction between the Kuroshio and the island. Sea surface temperature (SST) and chlorophyll-a (Chl-a) concentration data derived from the Himawari-8 satellite and the second generation global imager (SGLI) of global change observation mission (GCOM-C) were used in this study. The spatial SST and Chl-a variations in designed observation lines and the cooling zone transitions on the left and right sides of the vortices were investigated using 250 m spatial resolution GCOM-C data. The Massachusetts Institute of Technology general circulation model (MITgcm) simulation confirmed that the positive and negative vortices were sequentially detached from each other in a few hours. In addition, totals of 101 vortexes from July 2015 to December 2019 were calculated from the 1-h temporal resolution Himawari-8 imagery. The average vortex propagation speed was 0.95 m/s. Totals of 38 cases of two continuous vortices suggested that the average vortex shedding period is 14.8 h with 1.15 m/s of the average incoming surface current speed of Green Island, and the results agreed to the ideal Strouhal-Reynolds number fitting curve relation. Combined with the satellite observation and numerical model simulation, this study demonstrates the structure of the wake area could change quickly, and the water may mix in different vorticity states for each observation station.

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Section: Methodsmentioning

confidence: 99%

“…The SST data (2 km spatial resolution) and Chl-a (5 km spatial resolution) are available from 7 July 2015, with a 1-h temporal resolution. The Himawari-8 data have good accuracy and have been applied to calculate short-term sea surface currents [17,20].…”

Section: Sea Surface Temperature and Chlorophyll-a Concentrationmentioning

confidence: 99%

Temporal Variation and Spatial Structure of the Kuroshio-Induced Submesoscale Island Vortices Observed from GCOM-C and Himawari-8 Data

Hsu

Lee

et al. 2020

Remote Sensing

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“…Based on the Himawari‐8 SST images, Taniguchi et al. (2019) estimated the hourly total surface velocities in the southern Lombok Strait. Using the Himawari‐8 640‐nm albedo images, Z. Zhu et al.…”

Section: Introductionmentioning

confidence: 99%

“…It's worth noting that the Himawari-8 satellite can provide continuous, day-and night-time observations with a higher temporal resolution and a wider spatial coverage (−60°S-60°N, 80°E−160°W) (Bessho et al, 2016). Based on the Himawari-8 SST images, Taniguchi et al (2019) estimated the hourly total surface velocities in the southern Lombok Strait. Using the Himawari-8 640-nm albedo images, Z.…”

mentioning

confidence: 99%

Characterizing Tidal Currents and Guangdong Coastal Current Over the Northern South China Sea Shelf Using Himawari‐8 Geostationary Satellite Observations

Hu,

Li,

Wang

2023

Earth and Space Science

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Obtaining high spatiotemporal resolution surface currents with wide coverage is of great importance for understanding marine physical and biogeochemical processes, as well as practical applications. This study utilizes the sequential hourly images from the Himawari‐8 geostationary satellite to map the semidiurnal M2 surface tidal current pattern over the shallow shelf (<100 m) of the northern South China Sea. The comparison between the satellite‐derived tidal currents and the High‐Frequency Radar observations shows good agreement. The satellite‐derived tidal currents are also fairly comparable to the prediction of the regional tidal model from Oregon State University. The detided daily mean surface flows provide an apparent representation of the spatial pattern of the Guangdong Coastal Current (GCC) and its synoptic variability, well consistent with the simultaneous sea surface temperature and salinity satellite observations. The observed surface flows are compared to the Copernicus Marine Environment Monitoring Service daily model currents, and the model findings are in good agreement with the observations, indicating the sensitivity of the GCC to rapid changes of northeasterly winds. This study highlights the potential of the Himawari‐8 geostationary satellite in measuring sea surface currents over a broad, shallow continental shelf.

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“…The first derives the geostrophic current from the sea surface height. The second employs two consecutive (in time) images in the infrared (e.g., SST) or visible (e.g., chlorophyll-a concentration) bands [5] .…”

Section: Introductionmentioning

confidence: 99%

Estimating Surface Current from HIMAWARI-8 SST Data using Particle Image Velocimetry Method (Case Study in The Flores Sea)

Wati,

Osawa,

Karang

2023

Indonesian J Appl Phys

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<p class="Keywords">Four High-Frequency radar systems (HF) have been installed in Indonesia to monitor surface currents. In-situ ocean current observations are relatively expensive and limited by spatial and temporal resolution. Satellite remote sensing enables the estimate of surface current data generally from surface tracer data, including sea surface temperature (SST). Various methodologies have been developed to obtain surface currents. With Himawari-8 SST data, this study examines the accuracy of the resulting estimation. The cross-correlation fields of two identical-sized interrogation windows obtained from sequential images are employed in Particle Image Velocimetry (PIV). The HF radar in Labuan Bajo was used to validate surface current velocity estimates. RMSE, bias, and the Willmott index determined the accuracy. According to the estimates of surface currents made on July 29, 2022, the results follow a monsoon characteristic wind pattern in the Flores Sea. HF radar observations better validate the V component current estimation than the U component current estimation. A study of sea surface currents from SST data is lacking in Indonesian seas, and more repetition is required. As a result, This method has the potential can be employed to observe aquatic environments in other Indonesian areas.</p>

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Short-Term Variation of the Surface Flow Pattern South of Lombok Strait Observed from the Himawari-8 Sea Surface Temperature

Cited by 7 publications

References 39 publications

Temporal Variation and Spatial Structure of the Kuroshio-Induced Submesoscale Island Vortices Observed from GCOM-C and Himawari-8 Data

Temporal Variation and Spatial Structure of the Kuroshio-Induced Submesoscale Island Vortices Observed from GCOM-C and Himawari-8 Data

Characterizing Tidal Currents and Guangdong Coastal Current Over the Northern South China Sea Shelf Using Himawari‐8 Geostationary Satellite Observations

Estimating Surface Current from HIMAWARI-8 SST Data using Particle Image Velocimetry Method (Case Study in The Flores Sea)

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