{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:10:59.041308", "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": "2020-Jan-19_to_2020-Jan-21_265.0_41.5"}, "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": 2020010000516}, "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 19 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 69305.37129252063}, "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": ["United States"]}, "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": 41.5}, "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": 265.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "265.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 267.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-98.25, 42.0], [-98.03, 42.53], [-97.5, 42.75], [-97.25, 42.646], [-97.177, 42.677], [-97.03, 43.03], [-96.5, 43.25], [-96.25, 43.146], [-96.0, 43.25], [-95.75, 43.146], [-95.5, 43.25], [-95.25, 43.146], [-95.0, 43.25], [-94.75, 43.146], [-94.5, 43.25], [-93.97, 43.03], [-93.823, 42.677], [-93.75, 42.646], [-93.5, 42.75], [-92.97, 42.53], [-92.75, 42.0], [-92.854, 41.75], [-92.823, 41.677], [-92.47, 41.53], [-92.25, 41.0], [-92.47, 40.47], [-92.823, 40.323], [-92.97, 39.97], [-93.5, 39.75], [-93.75, 39.854], [-94.0, 39.75], [-94.25, 39.854], [-94.5, 39.75], [-95.03, 39.97], [-95.177, 40.323], [-95.53, 40.47], [-95.677, 40.823], [-95.75, 40.854], [-96.0, 40.75], [-96.25, 40.854], [-96.5, 40.75], [-96.75, 40.854], [-97.0, 40.75], [-97.53, 40.97], [-97.677, 41.323], [-98.03, 41.47], [-98.25, 42.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-19T11:30:00.000000000": {"type": "Polygon", 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39.85355339059328], [-94.5, 39.75], [-95.03033008588989, 39.96966991411009], [-95.17677669529661, 40.32322330470336], [-95.53033008588989, 40.46966991411009], [-95.67677669529661, 40.82322330470336], [-95.75, 40.85355339059328], [-96.0, 40.75], [-96.25, 40.85355339059328], [-96.5, 40.75], [-96.75, 40.85355339059328], [-97.0, 40.75], [-97.53033008588989, 40.96966991411009], [-97.67677669529661, 41.32322330470336]]]}, "2020-01-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-97.67677669529661, 41.32322330470336], [-98.03033008588989, 41.46966991411009], [-98.25, 42.0], [-98.03033008588989, 42.53033008588991], [-97.5, 42.75], [-97.25, 42.64644660940672], [-97.17677669529661, 42.67677669529664], [-97.03033008588989, 43.03033008588991], [-96.5, 43.25], [-96.25, 43.14644660940672], [-96.0, 43.25], [-95.75, 43.14644660940672], [-95.5, 43.25], [-95.25, 43.14644660940672], [-95.0, 43.25], [-94.75, 43.14644660940672], [-94.5, 43.25], [-93.96966991411011, 43.03033008588991], 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"anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.07365797303043, -12.45886255997514, -10.175531716711053]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.188618923502844, -14.257247928656312, -11.60225246521685]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.693736901201973, -1.9703673488168818, -1.6577428971102939]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.825043758134703, -2.2496915696196127, -1.9659297751614984]}}