{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:50.192631", "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": "2024-Sep-01_to_2024-Sep-05_256.5_29.0"}, "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": 2024090000095}, "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 01 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 2024"}, "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": 278517.55262979644}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 29.0}, "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": 256.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "256.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-100.75, 29.5], [-100.97, 28.97], [-101.5, 28.75], [-101.75, 28.85], [-101.82, 28.82], [-101.97, 28.47], [-102.32, 28.32], [-102.47, 27.97], [-103.0, 27.75], [-103.25, 27.85], [-103.32, 27.82], [-103.47, 27.47], [-104.0, 27.25], [-104.25, 27.35], [-104.5, 27.25], [-105.03, 27.47], [-105.25, 28.0], [-105.15, 28.25], [-105.18, 28.32], [-105.25, 28.35], [-105.5, 28.25], [-105.75, 28.35], [-106.0, 28.25], [-106.53, 28.47], [-106.75, 29.0], [-106.65, 29.25], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.18, 30.32], [-108.53, 30.47], [-108.75, 31.0], [-108.65, 31.25], [-108.75, 31.5], [-108.53, 32.03], [-108.18, 32.18], [-108.03, 32.53], [-107.5, 32.75], [-106.97, 32.53], [-106.82, 32.18], [-106.75, 32.15], [-106.5, 32.25], [-106.25, 32.15], [-106.0, 32.25], [-105.75, 32.15], [-105.5, 32.25], [-105.25, 32.15], [-105.18, 32.18], [-105.15, 32.25], [-105.25, 32.5], [-105.03, 33.03], [-104.5, 33.25], [-104.25, 33.15], [-104.18, 33.18], [-104.03, 33.53], [-103.5, 33.75], [-103.25, 33.65], [-103.18, 33.68], [-103.03, 34.03], [-102.5, 34.25], [-102.25, 34.15], [-102.0, 34.25], [-101.75, 34.15], [-101.5, 34.25], [-100.97, 34.03], [-100.82, 33.68], [-100.47, 33.53], [-100.32, 33.18], [-99.97, 33.03], [-99.75, 32.5], [-99.85, 32.25], [-99.75, 32.0], [-99.96, 31.5], [-99.75, 31.0], [-99.97, 30.47], [-100.5, 30.25], [-100.93, 30.43], [-100.75, 30.0], [-100.85, 29.75], [-100.75, 29.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 30.0], [-105.03, 30.53], [-104.5, 30.75], [-104.25, 30.65], [-104.0, 30.75], [-103.47000000000003, 30.53], [-103.32, 30.18], [-103.25, 30.15], [-103.0, 30.25], [-102.75, 30.15], [-102.5, 30.25], [-102.25, 30.15], [-102.0, 30.25], [-101.75, 30.15], [-101.5, 30.25], [-100.97000000000003, 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