{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:38.085025", "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-Aug-21_to_2015-Aug-23_247.5_51.0"}, "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": 2015080000808}, "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": "August 21 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 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": 60910.038344716086}, "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": ["N.W.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": 51.0}, "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": 247.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "247.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 247.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.25, 51.0], [-113.03, 51.53], [-112.5, 51.75], [-112.25, 51.65], [-112.18, 51.68], [-112.15, 51.75], [-112.25, 52.0], [-112.15, 52.25], [-112.18, 52.32], [-112.53, 52.47], [-112.75, 53.0], [-112.53, 53.53], [-112.0, 53.75], [-111.75, 53.65], [-111.68, 53.68], [-111.53, 54.03], [-111.0, 54.25], [-110.75, 54.15], [-110.5, 54.25], [-110.25, 54.15], [-110.0, 54.25], [-109.75, 54.15], [-109.5, 54.25], [-108.97, 54.03], [-108.82, 53.68], [-108.47, 53.53], [-108.25, 53.0], [-108.47, 52.47], [-108.82, 52.32], [-108.97, 51.97], [-109.32, 51.82], [-109.35, 51.75], [-109.25, 51.5], [-109.35, 51.25], [-109.25, 51.0], [-109.47, 50.47], [-109.82, 50.32], [-109.97, 49.97], [-110.5, 49.75], [-110.75, 49.85], [-111.0, 49.75], [-111.25, 49.85], [-111.5, 49.75], [-111.75, 49.85], [-112.0, 49.75], [-112.53, 49.97], [-112.68, 50.32], [-113.03, 50.47], [-113.25, 51.0]]]]}, "2015-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.25, 51.0], [-113.03, 51.53], [-112.5, 51.75], [-112.25, 51.65], [-112.18, 51.68], [-112.15, 51.75], [-112.25, 52.0], [-112.15, 52.25], [-112.18, 52.32], [-112.53, 52.47], [-112.75, 53.0], [-112.53, 53.53], [-112.0, 53.75], [-111.75, 53.65], [-111.68, 53.68], [-111.53, 54.03], [-111.0, 54.25], [-110.75, 54.15], [-110.5, 54.25], [-110.25, 54.15], [-110.0, 54.25], [-109.75, 54.15], [-109.5, 54.25], [-108.97, 54.03], [-108.82, 53.68], [-108.47, 53.53], [-108.25, 53.0], [-108.47, 52.47], [-108.82, 52.32], [-108.97, 51.97], [-109.32, 51.82], [-109.35, 51.75], [-109.25, 51.5], [-109.35, 51.25], [-109.25, 51.0], [-109.47, 50.47], [-109.82, 50.32], [-109.97, 49.97], [-110.5, 49.75], [-110.75, 49.85], [-111.0, 49.75], [-111.25, 49.85], [-111.5, 49.75], [-111.75, 49.85], [-112.0, 49.75], [-112.53, 49.97], [-112.68, 50.32], [-113.03, 50.47], [-113.25, 51.0]]]]}, "2015-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-113.25, 51.0], [-113.03, 51.53], [-112.5, 51.75], [-112.25, 51.65], [-112.18, 51.68], [-112.15, 51.75], [-112.25, 52.0], [-112.15, 52.25], [-112.18, 52.32], [-112.53, 52.47], [-112.75, 53.0], [-112.53, 53.53], [-112.0, 53.75], [-111.75, 53.65], [-111.68, 53.68], [-111.53, 54.03], [-111.0, 54.25], [-110.75, 54.15], [-110.5, 54.25], [-110.25, 54.15], [-110.0, 54.25], [-109.75, 54.15], [-109.5, 54.25], [-108.97, 54.03], [-108.82, 53.68], [-108.47, 53.53], [-108.25, 53.0], [-108.47, 52.47], [-108.82, 52.32], [-108.97, 51.97], [-109.32, 51.82], [-109.35, 51.75], [-109.25, 51.5], [-109.35, 51.25], [-109.25, 51.0], [-109.47, 50.47], [-109.82, 50.32], [-109.97, 49.97], [-110.5, 49.75], [-110.75, 49.85], [-111.0, 49.75], [-111.25, 49.85], [-111.5, 49.75], [-111.75, 49.85], [-112.0, 49.75], [-112.53, 49.97], [-112.68, 50.32], [-113.03, 50.47], [-113.25, 51.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.30352479073008}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.683893664895261}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.88445442905305, 9.703635979876026, 11.49361721911822]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.804933158645497, 8.951444966251017, 10.385930309779098]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.062884255437041, -7.004966329056163, -4.983830410192583]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.465387671054657, -8.30352479073008, -6.0360629440516504]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5115874326437284, -2.064140238249537, -1.4850973464763402]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9597614718340823, -2.3910848248097434, -1.6897608252660319]}}