{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:31.140804", "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": "2015-Mar-21_to_2015-Mar-23_277.0_49.5"}, "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": 2015030000797}, "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 21 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2015"}, "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": 139481.0152651014}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "N.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": 49.5}, "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": 277.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 274.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 282.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.03, 50.53], [-85.68, 50.68], [-85.65, 50.75], [-85.75, 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48.25], [-83.75, 48.35], [-84.0, 48.25], [-84.53, 48.47], [-84.68, 48.82], [-84.75, 48.85], [-85.0, 48.75], [-85.25, 48.85], [-85.5, 48.75], [-86.03, 48.97], [-86.25, 49.5], [-86.15, 49.75], [-86.25, 50.0], [-86.03, 50.53]]]]}, "2015-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.03, 50.53], [-85.68, 50.68], [-85.65, 50.75], [-85.75, 51.0], [-85.53, 51.53], [-85.18, 51.68], [-85.03, 52.03], [-84.68, 52.18], [-84.53, 52.53], [-84.0, 52.75], [-83.75, 52.65], [-83.5, 52.75], [-83.25, 52.65], [-83.0, 52.75], [-82.75, 52.65], [-82.5, 52.75], [-82.25, 52.65], [-82.0, 52.75], [-81.47, 52.53], [-81.32, 52.18], [-81.25, 52.15], [-81.0, 52.25], [-80.47, 52.03], [-80.32, 51.68], [-80.25, 51.65], [-80.0, 51.75], [-79.75, 51.65], [-79.5, 51.75], [-79.25, 51.65], [-79.0, 51.75], [-78.75, 51.65], [-78.5, 51.75], [-78.25, 51.65], [-78.0, 51.75], [-77.75, 51.65], [-77.5, 51.75], [-76.97, 51.53], [-76.75, 51.0], [-76.97, 50.47], [-77.32, 50.32], [-77.47, 49.97], [-77.82, 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.295908534874258}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.250074745472146}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.321594080667523, -18.03110775467593, -17.07832471606372]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.199076824657624, -21.144215446223967, -18.413591229512605]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.724381401314526, -10.756954929456239, -10.268887905645654]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.657267530354233, -12.295908534874258, -11.587699156084199]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5122177562401071, -1.6388490369290325, -1.5185366869469632]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8365095371431734, -1.9562186314914594, -1.8235683577930621]}}