{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:26.594057", "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-Jul-25_to_2015-Jul-27_237.5_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": 2015070001117}, "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 25 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 27 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": 65941.1119364362}, "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", "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": 237.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 51.0], [-125.03, 51.53], [-124.68, 51.68], [-124.65, 51.75], [-124.75, 52.0], [-124.65, 52.25], [-124.75, 52.5], [-124.53, 53.03], [-124.0, 53.25], [-123.75, 53.15], [-123.5, 53.25], [-123.25, 53.15], [-123.0, 53.25], [-122.75, 53.15], [-122.5, 53.25], [-122.25, 53.15], [-122.0, 53.25], [-121.75, 53.15], [-121.5, 53.25], [-120.97, 53.03], [-120.75, 52.5], [-120.85, 52.25], [-120.75, 52.0], [-120.97, 51.47], [-121.32, 51.32], [-121.46, 51.0], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.85, 49.75], [-120.75, 49.5], [-120.97, 48.97], [-121.5, 48.75], [-121.75, 48.85], [-122.0, 48.75], [-122.25, 48.85], [-122.5, 48.75], [-123.03, 48.97], [-123.18, 49.32], [-123.25, 49.35], [-123.5, 49.25], [-124.03, 49.47], [-124.18, 49.82], [-124.53, 49.97], [-124.68, 50.32], [-125.03, 50.47], [-125.25, 51.0]]]]}, "2015-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 51.0], [-125.03, 51.53], [-124.68, 51.68], [-124.65, 51.75], [-124.75, 52.0], [-124.65, 52.25], [-124.75, 52.5], [-124.53, 53.03], [-124.0, 53.25], [-123.75, 53.15], [-123.5, 53.25], [-123.25, 53.15], [-123.0, 53.25], [-122.75, 53.15], [-122.5, 53.25], [-122.25, 53.15], [-122.0, 53.25], [-121.75, 53.15], [-121.5, 53.25], [-120.97, 53.03], [-120.75, 52.5], [-120.85, 52.25], [-120.75, 52.0], [-120.97, 51.47], [-121.32, 51.32], [-121.46, 51.0], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.85, 49.75], [-120.75, 49.5], [-120.97, 48.97], [-121.5, 48.75], [-121.75, 48.85], [-122.0, 48.75], [-122.25, 48.85], [-122.5, 48.75], [-123.03, 48.97], [-123.18, 49.32], [-123.25, 49.35], [-123.5, 49.25], [-124.03, 49.47], [-124.18, 49.82], [-124.53, 49.97], [-124.68, 50.32], [-125.03, 50.47], [-125.25, 51.0]]]]}, "2015-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 51.0], [-125.03, 51.53], [-124.68, 51.68], [-124.65, 51.75], [-124.75, 52.0], [-124.65, 52.25], [-124.75, 52.5], [-124.53, 53.03], [-124.0, 53.25], [-123.75, 53.15], [-123.5, 53.25], [-123.25, 53.15], [-123.0, 53.25], [-122.75, 53.15], [-122.5, 53.25], [-122.25, 53.15], [-122.0, 53.25], [-121.75, 53.15], [-121.5, 53.25], [-120.97, 53.03], [-120.75, 52.5], [-120.85, 52.25], [-120.75, 52.0], [-120.97, 51.47], [-121.32, 51.32], [-121.46, 51.0], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.85, 49.75], [-120.75, 49.5], [-120.97, 48.97], [-121.5, 48.75], [-121.75, 48.85], [-122.0, 48.75], [-122.25, 48.85], [-122.5, 48.75], [-123.03, 48.97], [-123.18, 49.32], [-123.25, 49.35], [-123.5, 49.25], [-124.03, 49.47], [-124.18, 49.82], [-124.53, 49.97], [-124.68, 50.32], [-125.03, 50.47], [-125.25, 51.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.798520815451525}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.081806866320054}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.192392565630541, 8.763524379020453, 9.694473419367682]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.167017383268956, 4.32263956401016, 4.190398645933783]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.436610946836703, -5.892506863480926, -4.916302788642533]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.448131993559969, -6.798520815451525, -6.558188882821526]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4309738913607262, -1.8777148094556275, -1.5095317568125248]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6569920283137098, -2.2409834045270047, -2.04861723654206]}}