{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:48.768869", "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": "2022-Sep-04_to_2022-Sep-07_158.5_-30.5"}, "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": 2022090000228}, "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": "September 04 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 07 2022"}, "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": 60836.139190981194}, "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": ["Australia"]}, "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": ["Pacific Ocean", "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": -30.5}, "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": 158.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "158.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 157.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 161.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[156.82, -29.82], [156.97, -29.47], [157.5, -29.25], [158.0, -29.46], [158.5, -29.25], [158.75, -29.35], [159.0, -29.25], [159.53, -29.47], [159.68, -29.82], [160.03, -29.97], [160.25, -30.5], [160.15, -30.75], [160.25, -31.0], [160.15, -31.25], [160.18, -31.32], [160.53, -31.47], [160.68, -31.82], [161.03, -31.97], [161.18, -32.32], [161.53, -32.47], [161.75, -33.0], [161.53, -33.53], [161.0, -33.75], [160.47, -33.53], [160.32, -33.18], [160.25, -33.15], [160.0, -33.25], [159.47, -33.03], [159.32, -32.68], [159.25, -32.65], [159.0, -32.75], [158.47, -32.53], [158.32, -32.18], [157.97, -32.03], [157.82, -31.68], [157.75, -31.65], [157.5, -31.75], [156.97, -31.53], [156.82, -31.18], [156.47, -31.03], [156.25, -30.5], [156.47, -29.97], [156.82, -29.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.47, -31.03], [156.25, -30.5], [156.47, -29.97], [156.82, -29.82], [156.97, -29.47], [157.5, -29.25], [158.0, -29.46], [158.5, -29.25], [159.03, -29.47], [159.18, -29.82], [159.53, -29.97], [159.75, -30.5], [159.65, -30.75], [159.75, -31.0], [159.65, -31.25], [159.75, -31.5], [159.53, -32.03], [159.0, -32.25], [158.75, -32.15], [158.5, -32.25], [157.97, -32.03], [157.82, -31.68], [157.75, -31.65], [157.5, -31.75], [156.97, -31.53], [156.82, -31.18], [156.47, -31.03]]]]}, "2022-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.47, -31.03], [156.25, -30.5], [156.47, -29.97], [156.82, -29.82], [156.97, -29.47], [157.5, -29.25], [158.0, -29.46], [158.5, -29.25], [158.75, -29.35], [159.0, -29.25], [159.53, -29.47], [159.68, -29.82], [160.03, -29.97], [160.25, -30.5], [160.15, -30.75], [160.25, -31.0], [160.15, -31.25], [160.18, -31.32], [160.53, -31.47], [160.68, -31.82], [161.03, -31.97], [161.18, -32.32], [161.53, -32.47], [161.75, -33.0], [161.53, -33.53], [161.0, -33.75], [160.47, -33.53], [160.32, -33.18], [160.25, -33.15], [160.0, -33.25], [159.47, -33.03], [159.32, -32.68], [159.25, -32.65], [159.0, -32.75], [158.47, -32.53], [158.32, -32.18], [157.97, -32.03], [157.82, -31.68], [157.75, -31.65], [157.5, -31.75], [156.97, -31.53], [156.82, -31.18], [156.47, -31.03]]]]}, "2022-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.47, -31.03], [156.25, -30.5], [156.47, -29.97], [156.82, -29.82], [156.97, -29.47], [157.5, -29.25], [158.0, -29.46], [158.5, -29.25], [158.75, -29.35], [159.0, -29.25], [159.53, -29.47], [159.68, -29.82], [160.03, -29.97], [160.25, -30.5], [160.15, -30.75], [160.25, -31.0], [160.15, -31.25], [160.18, -31.32], [160.53, -31.47], [160.68, -31.82], [161.03, -31.97], [161.18, -32.32], [161.53, -32.47], [161.75, -33.0], [161.53, -33.53], [161.0, -33.75], [160.47, -33.53], [160.32, -33.18], [160.25, -33.15], [160.0, -33.25], [159.47, -33.03], [159.32, -32.68], [159.25, -32.65], [159.0, -32.75], 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-31.53], [156.82, -31.18], [156.47, -31.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7776048813649936}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4957007675503171}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.187896431238244, 15.897347426434465, 15.790933048848558, 15.860322420064279]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.78244829947647, 14.699655825520438, 14.406850319781313, 14.665851731996668]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5048828172452973, -1.4699626673253143, -1.5611426653215477, -1.4487664952958632]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6274407070132497, -1.657516211386337, -1.7776048813649936, -1.6003079919782977]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3894660000066308, -1.3131841702622997, -1.3955666708815198, -1.2749655580194297]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4550424139817626, -1.4445404022866517, -1.5542799239962248, -1.3818740553468238]}}