Scenario 2A Extreme Waves Progress

[Bobfrat]

Progress: 2A Extreme Waves

Successes

• Catalog-driven search using OGC CSW allowed for dynamic updating as new datasets become available (or inactive).
• Data from both OPeNDAP-CF and SOS endpoints were discovered, accessed and used. The accessing of SOS endpoint leveraged IOOS driven tools (PYOOS) including the new bounding box filtering feature from release 0.6.2.
• Historic observation datasets of sufficient length for extreme value analysis (20+ years) were discovered, accessed, and used to create return period plots (Figure 1).
• Modeled hindcast datasets from the Wave Information Studies (WIS) for extreme value analysis (20+ years) were downloaded and saved to a JSON file and subsequently used to create return period plot (Figure 1).
• Standards-based tools allowed extraction of NOAA Wavewatch III model output at the nearest point to the observation station, courtesy of the British Met Office Iris package.
• An inline interactive map interface displays the locations of observation data and corresponding model grid points (Figure 2).
• The maximum wave height from the modeled data event of interest was then plotted on the return period plot for comparison (Figure 3).

Figure 1: Return period plot of significant wave height for NDBC station 44014 and nearest WIS Station 63255.

Figure 2: Map showing locations of NDBC station (blue), nearest WIS station (green), and nearest Wavewatch III model grid point (purple).

Figure 3: Return period plot of significant wave height for NDBC station 44014 with max wave height from user specified event overlaid.

Easy Challenges: Identified and Fixed

• The execution time of getting the data through the SOS server was extremely slow, so the data was extracted directly from a DAP endpoint.

  Longer-term Challenges Identified

• SOS is not ideal for extracting large datasets. The requests need to be split into 31 day requests ( #81 ) and the servers time out often. In this notebook I saw that the SOS server didn't contain the entire dataset #137.

[jkupiec]

This one appears to be complete and no work has been done on it for some time. Closing.