{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:21:54.696380", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2021-Jan-28_to_2021-Jan-31_173.5_-39.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2021010001093}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "January 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 97439.55166703666}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["New Zealand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Tasman Sea"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -39.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 173.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "173.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 171.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 175.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -38.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[170.75, -39.0], [170.854, -38.75], [170.75, -38.5], [170.97, -37.97], [171.5, -37.75], [172.03, -37.97], [172.177, -38.323], 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IPCC regions affected", "value": ["New-Zealand"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[170.85355339059328, -39.75], [170.75, -39.5], [170.85355339059328, -39.25], [170.75, -39.0], [170.85355339059328, -38.75], [170.75, -38.5], [170.96966991411009, -37.96966991411009], [171.5, -37.75], [172.03033008588991, -37.96966991411009], [172.17677669529664, -38.32322330470336], [172.25, -38.35355339059328], [172.5, -38.25], [172.75, -38.35355339059328], [173.0, -38.25], [173.25, -38.35355339059328], [173.5, -38.25], [173.75, -38.35355339059328], [174.0, -38.25], [174.25, -38.35355339059328], [174.32322330470336, -38.32322330470336], [174.46966991411009, -37.96966991411009], [175.0, -37.75], [175.25, -37.85355339059328], [175.5, -37.75], [176.03033008588991, -37.96966991411009], [176.25, -38.5], [176.14644660940672, -38.75], 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