{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:46.757076", "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": "2026-Mar-17_to_2026-Mar-21_139.0_-7.0"}, "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": 2026030000513}, "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": "March 17 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 110321.83527587709}, "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": ["Indonesia", "Papua New Guinea"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": ["Arafura 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": -7.0}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -9.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[138.25, -8.65], [138.0, -8.75], [137.47, -8.53], [137.25, -8.0], [137.47, -7.47], [137.82, -7.32], [137.85, -7.25], [137.75, -7.0], [137.96, -6.5], [137.75, -6.0], [137.85, -5.75], [137.82, -5.68], [137.47, -5.53], [137.25, -5.0], [137.47, -4.47], [138.0, -4.25], [138.53, -4.47], [138.68, -4.82], [139.03, -4.97], [139.18, -5.32], [139.53, -5.47], [139.68, -5.82], [139.75, -5.85], [140.0, -5.75], [140.25, -5.85], [140.5, -5.75], [141.03, -5.97], [141.18, -6.32], [141.53, -6.47], [141.68, -6.82], [142.03, -6.97], [142.18, -7.32], [142.53, -7.47], [142.75, -8.0], [142.65, -8.25], [142.68, -8.32], [143.03, -8.47], [143.25, -9.0], [143.03, -9.53], [142.5, -9.75], [142.25, -9.65], [142.0, -9.75], [141.75, -9.65], [141.5, -9.75], [140.97, -9.53], [140.82, -9.18], [140.75, -9.15], [140.5, -9.25], [139.97, -9.03], [139.82, -8.68], [139.75, -8.65], [139.5, -8.75], [139.25, -8.65], [139.0, -8.75], [138.75, -8.65], [138.5, -8.75], [138.25, -8.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.5, -8.75], [137.97, -8.53], [137.75, -8.0], [137.97, -7.47], [138.5, -7.25], [139.03, -7.47], [139.25, -8.0], [139.03, -8.53], [138.5, -8.75]]], [[[138.47, -7.03], [138.25, -6.5], [138.47, -5.97], [139.0, -5.75], [139.53, -5.97], [139.75, -6.5], [139.53, -7.03], [139.0, -7.25], [138.47, -7.03]]], [[[137.47, -5.53], [137.25, -5.0], [137.47, -4.47], [138.0, -4.25], [138.53, -4.47], [138.75, -5.0], [138.53, -5.53], [138.0, -5.75], [137.47, -5.53]]]]}, "2026-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.85, -7.25], [137.75, -7.0], [137.96, -6.5], [137.75, -6.0], [137.85, -5.75], [137.82, -5.68], [137.47, -5.53], [137.25, -5.0], [137.47, -4.47], [138.0, -4.25], [138.53, -4.47], [138.68, -4.82], [139.03, -4.97], [139.18, -5.32], [139.53, -5.47], [139.68, -5.82], [139.75, -5.85], 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anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1963986374196718, -1.5149016745396437, -1.2756815915484465, -1.3417688807510235, -1.062165001093831]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.318547320032053, -2.0136846480590407, -1.7627042138909133, -1.6708974040200815, -1.1110633974633402]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4578519140863346, -1.9670589608056288, -1.6509150432332937, -1.7401232349885851, -1.2906609173682804]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5077238011494678, -2.907012136008959, -2.2492681026404484, -2.1212545379014176, -1.3214180588123259]}}