A 26-month time series of Himawari-8 satellite sea surface temperature (SST) data from July 2015 to September 2017, used to map the encroachment of the East Australian Current (EAC). The dataset was created by Xie, Huang, Wang, and Leplastrier in a 2020 study published in the Journal of Geophysical Research: Oceans. The high-resolution SST images enabled mapping of the EAC's meanders, offshoots, eddies, and extensions using a Topographic Position Index method.
Use Cases
- Analyzing the spatial variability and temporal evolution of the East Australian Current's meanders and eddies based on SST signatures.
- Investigating seasonal cycles in current encroachment, such as stronger encroachment during austral summer, as described.
- Correlating SST signatures with surface current speed signatures, as the study found an overlap ratio of approximately 60%.
- Examining eddy-shedding timescales (65-80 days upstream, 90-100 days downstream) of the EAC encroachment using temporal wavelet analyses.
- Mapping powerful summer pulses of the EAC encroachment off the eastern coast of Tasmania.
Strengths
- Data covers a specific 26-month study period from July 2015 to September 2017.
- Uses very high spatiotemporal resolution Himawari-8 SST images, enabling mapping of highly dynamic features.
- Study methodology validated by relating SST signature to surface current speed with an area overlap ratio of approximately 60%.
- Analysis identified specific eddy-shedding timescales (65-80 days upstream, 90-100 days downstream) and seasonal encroachment patterns.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Derived from Himawari-8 satellite SST data using a Topographic Position Index (TPI) mapping method.
- Time Range
- July 2015 to September 2017
- Freshness
- Last updated 2026-04-16 16:03:15.711452; freshness should be verified.
- Geography
- Southeast coast of Australia, including the East Australian Current path and the eastern coast of Tasmania.