{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:21.444574", "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": "2018-Mar-15_to_2018-Mar-19_238.0_43.0"}, "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": 2018030000612}, "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 15 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 19 2018"}, "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": 71966.4112857946}, "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": 43.0}, "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": 238.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "238.0\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": 240.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.75}, "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": {"2018-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.03, 41.03], [-123.5, 41.25], [-123.25, 41.15], [-123.18, 41.18], [-123.15, 41.25], [-123.25, 41.5], [-123.12, 41.8], [-123.53, 41.97], [-123.75, 42.5], [-123.53, 43.03], [-123.0, 43.25], [-122.75, 43.15], [-122.68, 43.18], [-122.53, 43.53], [-122.0, 43.75], [-121.5, 43.54], [-121.0, 43.75], [-120.75, 43.65], [-120.5, 43.75], [-119.97, 43.53], [-119.75, 43.0], [-119.85, 42.75], [-119.75, 42.5], [-119.85, 42.25], [-119.75, 42.0], [-119.97, 41.47], [-120.5, 41.25], [-120.8, 41.38], [-120.85, 41.25], [-120.75, 41.0], [-120.97, 40.47], [-121.32, 40.32], [-121.35, 40.25], [-121.25, 40.0], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-123.03, 38.97], [-123.18, 39.32], [-123.25, 39.35], [-123.5, 39.25], [-124.03, 39.47], [-124.25, 40.0], [-124.15, 40.25], [-124.25, 40.5], [-124.03, 41.03]]]]}, "2018-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 40.5], [-124.53, 41.03], [-124.0, 41.25], [-123.75, 41.15], [-123.5, 41.25], [-123.25, 41.15], [-123.18, 41.18], [-123.15, 41.25], [-123.25, 41.5], [-123.12, 41.8], [-123.53, 41.97], [-123.75, 42.5], [-123.53, 43.03], [-123.0, 43.25], [-122.75, 43.15], [-122.68, 43.18], [-122.53, 43.53], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.0, 43.75], [-120.75, 43.65], [-120.5, 43.75], [-119.97, 43.53], [-119.82, 43.18], [-119.47, 43.03], [-119.25, 42.5], [-119.35, 42.25], [-119.25, 42.0], [-119.47, 41.47], [-120.0, 41.25], [-120.25, 41.35], [-120.5, 41.25], [-120.75, 41.35], [-120.82, 41.32], [-120.85, 41.25], [-120.75, 41.0], [-120.97, 40.47], [-121.32, 40.32], [-121.35, 40.25], [-121.25, 40.0], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-122.82, 38.82], [-122.97, 38.47], [-123.5, 38.25], [-124.03, 38.47], [-124.25, 39.0], [-124.04, 39.5], [-124.18, 39.82], [-124.53, 39.97], [-124.75, 40.5]]]]}, "2018-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 40.5], [-124.53, 41.03], [-124.0, 41.25], [-123.75, 41.15], [-123.5, 41.25], [-123.25, 41.15], [-123.18, 41.18], [-123.15, 41.25], [-123.25, 41.5], [-123.12, 41.8], [-123.53, 41.97], [-123.75, 42.5], [-123.53, 43.03], [-123.0, 43.25], [-122.75, 43.15], [-122.68, 43.18], [-122.53, 43.53], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.0, 43.75], [-120.75, 43.65], [-120.5, 43.75], [-119.97, 43.53], [-119.82, 43.18], [-119.47, 43.03], [-119.25, 42.5], [-119.35, 42.25], [-119.25, 42.0], [-119.47, 41.47], [-120.0, 41.25], [-120.25, 41.35], [-120.5, 41.25], [-120.75, 41.35], [-120.82, 41.32], [-120.85, 41.25], [-120.75, 41.0], [-120.97, 40.47], [-121.32, 40.32], [-121.35, 40.25], [-121.25, 40.0], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-122.82, 38.82], [-122.97, 38.47], [-123.5, 38.25], [-124.03, 38.47], [-124.25, 39.0], [-124.04, 39.5], [-124.18, 39.82], [-124.53, 39.97], [-124.75, 40.5]]]]}, "2018-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.53, 39.97], [-124.75, 40.5], [-124.53, 41.03], [-124.0, 41.25], [-123.47, 41.03], [-123.3, 40.63], [-123.12, 40.7], [-123.25, 41.0], [-123.03, 41.53], [-122.68, 41.68], [-122.53, 42.03], [-122.0, 42.25], [-122.53, 42.47], [-122.75, 43.0], [-122.53, 43.53], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.0, 43.75], [-120.75, 43.65], [-120.5, 43.75], [-119.97, 43.53], [-119.82, 43.18], [-119.47, 43.03], [-119.25, 42.5], [-119.35, 42.25], [-119.25, 42.0], [-119.47, 41.47], [-120.0, 41.25], [-120.25, 41.35], [-120.5, 41.25], [-120.75, 41.35], [-121.0, 41.25], [-121.3, 41.38], [-121.35, 41.25], [-121.25, 41.0], [-121.35, 40.75], [-121.25, 40.5], [-121.35, 40.25], [-121.25, 40.0], [-121.47, 39.47], [-121.82, 39.32], [-121.97, 38.97], [-122.5, 38.75], [-122.75, 38.85], [-122.82, 38.82], [-122.97, 38.47], [-123.5, 38.25], [-124.03, 38.47], [-124.25, 39.0], [-124.03, 39.53], [-123.68, 39.68], [-123.65, 39.75], [-123.7, 39.88], [-124.0, 39.75], [-124.53, 39.97]], [[-121.7, 42.13], [-121.65, 42.25], [-121.68, 42.32], [-121.75, 42.35], [-122.0, 42.25], [-121.7, 42.13]]]]}, "2018-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 42.47], [-122.75, 43.0], [-122.53, 43.53], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-120.97, 43.53], [-120.75, 43.0], [-120.97, 42.47], [-121.5, 42.25], [-121.75, 42.35], [-122.0, 42.25], [-122.53, 42.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.956259416417652}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.6287240385947905}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.1160222673266276, 0.5331085413175742, 0.3605331822143967, 0.2722562739810428, -2.2090705006575604]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.046593205218699, -4.243949769687902, -5.659750035459808, -4.033426611483833, -2.554142012676664]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.274313431820784, -5.671020630194813, -5.930673230602041, -5.667792280330302, -4.13562513574729]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.226582582045012, -7.2245652786224355, -7.956259416417652, -7.154992002663903, -4.311381563040811]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5715876589882516, -1.6836144211546573, -1.7753794960570022, -1.7251290322774164, -1.4856319144352728]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7828530149981985, -2.1226558047129394, -2.2681971640530714, -2.1425159620691874, -1.4969583578158883]}}