{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:50.916731", "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": "2010-Oct-25_to_2010-Oct-29_237.0_41.0"}, "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": 2010100000998}, "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": "October 25 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 29 2010"}, "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": 51190.93853637735}, "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": ["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": 41.0}, "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": 237.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.75}, "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": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 42.0], [-124.53, 42.53], [-124.0, 42.75], [-123.75, 42.65], [-123.5, 42.75], [-123.2, 42.63], [-123.15, 42.75], [-123.25, 43.0], [-123.03, 43.53], [-122.5, 43.75], [-122.25, 43.65], [-122.0, 43.75], [-121.47, 43.53], [-121.25, 43.0], [-121.46, 42.5], [-121.25, 42.0], [-121.35, 41.75], [-121.32, 41.68], [-120.97, 41.53], [-120.75, 41.0], [-120.85, 40.75], [-120.75, 40.5], [-120.97, 39.97], [-121.32, 39.82], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-123.0, 38.75], [-123.53, 38.97], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.54, 40.5], [-123.68, 40.82], [-124.03, 40.97], [-124.18, 41.32], [-124.53, 41.47], [-124.75, 42.0]]]]}, "2010-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 42.0], [-124.53, 42.53], [-124.0, 42.75], [-123.75, 42.65], [-123.5, 42.75], [-123.2, 42.63], [-123.15, 42.75], [-123.25, 43.0], [-123.03, 43.53], [-122.5, 43.75], [-122.25, 43.65], [-122.0, 43.75], [-121.47, 43.53], [-121.25, 43.0], [-121.46, 42.5], [-121.25, 42.0], [-121.35, 41.75], [-121.32, 41.68], [-120.97, 41.53], [-120.75, 41.0], [-120.85, 40.75], [-120.75, 40.5], [-120.97, 39.97], [-121.32, 39.82], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-123.0, 38.75], [-123.53, 38.97], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.54, 40.5], [-123.68, 40.82], [-124.03, 40.97], [-124.18, 41.32], [-124.53, 41.47], [-124.75, 42.0]]]]}, "2010-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 42.0], [-124.53, 42.53], [-124.0, 42.75], [-123.75, 42.65], [-123.5, 42.75], [-123.2, 42.63], [-123.15, 42.75], [-123.25, 43.0], [-123.03, 43.53], [-122.5, 43.75], [-122.25, 43.65], [-122.0, 43.75], [-121.47, 43.53], [-121.25, 43.0], [-121.46, 42.5], [-121.25, 42.0], [-121.35, 41.75], [-121.32, 41.68], [-120.97, 41.53], [-120.75, 41.0], [-120.85, 40.75], [-120.75, 40.5], [-120.97, 39.97], [-121.32, 39.82], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-123.0, 38.75], [-123.53, 38.97], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.65, 40.75], [-123.68, 40.82], [-124.03, 40.97], [-124.18, 41.32], [-124.53, 41.47], [-124.75, 42.0]]]]}, "2010-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 40.25], [-123.75, 40.5], [-123.65, 40.75], [-123.75, 41.0], [-123.65, 41.25], [-123.75, 41.5], [-123.53, 42.03], [-123.0, 42.25], [-122.47, 42.03], [-122.32, 41.68], [-121.97, 41.53], [-121.75, 41.0], [-121.96, 40.5], [-121.75, 40.0], [-121.85, 39.75], [-121.75, 39.5], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-123.0, 38.75], [-123.53, 38.97], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25]]]]}, "2010-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 40.75], [-123.75, 41.0], [-123.65, 41.25], [-123.75, 41.5], [-123.53, 42.03], [-123.0, 42.25], [-122.47, 42.03], [-122.25, 41.5], [-122.35, 41.25], [-122.25, 41.0], [-122.35, 40.75], [-122.25, 40.5], [-122.35, 40.25], [-122.25, 40.0], [-122.47, 39.47], [-123.0, 39.25], [-123.53, 39.47], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.65, 40.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.149703300829515}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.500515326680644}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.427146632508709, 5.0270033447121705, 3.333349692819013, 5.849377369595118, 4.391816582373508]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.10834084927989807, -0.754258542778814, -4.369105646578362, 2.1754787558055, 2.4518553981758373]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.985165044275564, -5.118085389144948, -6.570021023785402, -5.308569024232, -4.715472752190834]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.517121512850792, -7.1814579254503315, -9.149703300829515, -6.369636537645363, -5.057792707878946]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5891160483758433, -1.6141152130678904, -2.0236139507353084, -1.5874174112935977, -1.3905052600292225]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7655765837271176, -1.8847938218781028, -2.535601167101896, -1.7998490603833253, -1.4709559700673536]}}