{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:34.431379", "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": "2025-Sep-03_to_2025-Sep-07_252.5_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": 2025090000163}, "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 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 07 2025"}, "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": 136535.582265091}, "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": ["Mexico"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": []}, "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": 252.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "252.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 247.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 253.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-109.35, 27.75], [-109.25, 27.5], [-109.47, 26.97], [-110.0, 26.75], [-110.53, 26.97], [-110.68, 27.32], [-111.03, 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[-109.37, 28.3], [-109.25, 28.0], [-109.35, 27.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 28.53], [-110.0, 28.75], [-109.47, 28.53], [-109.25, 28.0], [-109.47, 27.47], [-110.0, 27.25], [-110.53, 27.47], [-110.75, 28.0], [-110.53, 28.53]]]]}, "2025-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.25, 31.0], [-113.03, 31.53], [-112.5, 31.75], [-112.25, 31.65], [-112.0, 31.75], [-111.47, 31.53], [-111.32, 31.18], [-111.0, 31.04], [-110.5, 31.25], [-110.25, 31.15], [-110.18, 31.18], [-110.03, 31.53], [-109.5, 31.75], [-109.25, 31.65], [-109.0, 31.75], [-108.47, 31.53], [-108.32, 31.18], [-108.0, 31.04], [-107.5, 31.25], [-106.97, 31.03], [-106.82, 30.68], 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