{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:52.362408", "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": "2013-Jul-20_to_2013-Jul-24_275.0_31.0"}, "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": 2013070001116}, "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": "July 20 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 24 2013"}, "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": 76257.59939507538}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 31.0}, "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": 275.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "275.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.03, 32.03], [-85.68, 32.18], [-85.53, 32.53], [-85.0, 32.75], [-84.75, 32.65], [-84.5, 32.75], [-84.25, 32.65], [-84.0, 32.75], [-83.75, 32.65], [-83.68, 32.68], [-83.53, 33.03], [-83.0, 33.25], [-82.75, 33.15], [-82.5, 33.25], [-81.97, 33.03], [-81.75, 32.5], [-81.85, 32.25], [-81.75, 32.0], [-81.85, 31.75], [-81.75, 31.5], [-81.85, 31.25], [-81.75, 31.0], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-83.82, 30.32], [-83.97, 29.97], [-84.5, 29.75], [-85.03, 29.97], [-85.18, 30.32], [-85.25, 30.35], [-85.5, 30.25], [-86.03, 30.47], [-86.25, 31.0], [-86.15, 31.25], [-86.25, 31.5], [-86.03, 32.03]]]]}, "2013-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.03, 32.03], [-85.68, 32.18], [-85.53, 32.53], [-85.0, 32.75], [-84.75, 32.65], [-84.5, 32.75], [-84.25, 32.65], [-84.0, 32.75], [-83.75, 32.65], [-83.68, 32.68], [-83.53, 33.03], [-83.0, 33.25], [-82.75, 33.15], [-82.5, 33.25], [-81.97, 33.03], [-81.75, 32.5], [-81.85, 32.25], [-81.75, 32.0], [-81.85, 31.75], [-81.75, 31.5], [-81.85, 31.25], [-81.75, 31.0], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-83.82, 30.32], [-83.97, 29.97], [-84.5, 29.75], [-85.03, 29.97], [-85.18, 30.32], [-85.25, 30.35], [-85.5, 30.25], [-86.03, 30.47], [-86.25, 31.0], [-86.15, 31.25], [-86.25, 31.5], [-86.03, 32.03]]]]}, "2013-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 33.75], [-85.47, 33.53], [-85.32, 33.18], [-85.25, 33.15], [-85.0, 33.25], [-84.47, 33.03], [-84.32, 32.68], [-84.25, 32.65], [-84.0, 32.75], [-83.75, 32.65], [-83.68, 32.68], [-83.53, 33.03], [-83.0, 33.25], [-82.75, 33.15], [-82.5, 33.25], [-81.97, 33.03], [-81.75, 32.5], [-81.85, 32.25], [-81.75, 32.0], [-81.85, 31.75], [-81.75, 31.5], [-81.85, 31.25], [-81.75, 31.0], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-83.82, 30.32], [-83.97, 29.97], [-84.5, 29.75], [-85.03, 29.97], [-85.18, 30.32], [-85.25, 30.35], [-85.5, 30.25], [-86.03, 30.47], [-86.18, 30.82], [-86.53, 30.97], [-86.75, 31.5], [-86.62, 31.8], [-87.03, 31.97], [-87.25, 32.5], [-87.03, 33.03], [-86.68, 33.18], [-86.53, 33.53], [-86.0, 33.75]]]]}, "2013-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 33.75], [-85.47, 33.53], [-85.32, 33.18], [-85.25, 33.15], [-85.0, 33.25], [-84.47, 33.03], [-84.25, 32.5], [-84.35, 32.25], [-84.25, 32.0], [-84.46, 31.5], [-84.25, 31.0], [-84.47, 30.47], [-85.0, 30.25], [-85.53, 30.47], [-85.7, 30.88], [-86.0, 30.75], [-86.53, 30.97], [-86.75, 31.5], [-86.62, 31.8], [-87.03, 31.97], [-87.25, 32.5], [-87.03, 33.03], [-86.68, 33.18], [-86.53, 33.53], [-86.0, 33.75]]]]}, "2013-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 33.75], [-85.47, 33.53], [-85.32, 33.18], [-85.25, 33.15], [-85.0, 33.25], [-84.47, 33.03], [-84.25, 32.5], [-84.35, 32.25], [-84.25, 32.0], [-84.46, 31.5], [-84.25, 31.0], [-84.47, 30.47], [-85.0, 30.25], [-85.53, 30.47], [-85.7, 30.88], [-86.0, 30.75], [-86.53, 30.97], [-86.75, 31.5], [-86.62, 31.8], [-87.03, 31.97], [-87.25, 32.5], [-87.03, 33.03], [-86.68, 33.18], [-86.53, 33.53], [-86.0, 33.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.019710626331175}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7683253989841443}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.371837130950667, 24.96647475186063, 24.968592121865584, 25.01098816748106, 24.113009713927795]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.703177775074153, 24.64274281097738, 24.32457345017741, 24.112348610044876, 23.74741926666826]}, "anom_evo_areamean": {"name": 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-2.112287120130983]}}