{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:58.513692", "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": "2022-Jun-18_to_2022-Jun-20_242.0_36.5"}, "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": 2022060000809}, "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": "June 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 20 2022"}, "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": 72332.83149276383}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 36.5}, "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": 242.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "242.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 241.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-119.53, 40.53], [-119.18, 40.68], [-119.03, 41.03], [-118.68, 41.18], [-118.53, 41.53], [-118.0, 41.75], [-117.75, 41.65], [-117.5, 41.75], [-116.97, 41.53], [-116.75, 41.0], [-116.85, 40.75], [-116.75, 40.5], [-116.85, 40.25], [-116.75, 40.0], [-116.85, 39.75], [-116.75, 39.5], [-116.85, 39.25], [-116.75, 39.0], [-116.85, 38.75], [-116.82, 38.68], [-116.47, 38.53], [-116.25, 38.0], [-116.35, 37.75], [-116.25, 37.5], [-116.35, 37.25], [-116.25, 37.0], [-116.35, 36.75], [-116.25, 36.5], [-116.47, 35.97], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.75, 36.5], [-118.65, 36.75], [-118.75, 37.0], [-118.65, 37.25], [-118.75, 37.5], [-118.65, 37.75], [-118.68, 37.82], [-119.03, 37.97], [-119.25, 38.5], [-119.15, 38.75], [-119.25, 39.0], [-119.15, 39.25], [-119.18, 39.32], [-119.53, 39.47], [-119.75, 40.0], [-119.53, 40.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.53, 39.47], [-119.75, 40.0], [-119.53, 40.53], [-119.18, 40.68], [-119.03, 41.03], [-118.68, 41.18], [-118.53, 41.53], [-118.0, 41.75], [-117.75, 41.65], [-117.5, 41.75], [-116.97, 41.53], [-116.75, 41.0], [-116.85, 40.75], [-116.75, 40.5], [-116.85, 40.25], [-116.75, 40.0], [-116.85, 39.75], [-116.75, 39.5], [-116.85, 39.25], [-116.75, 39.0], [-116.85, 38.75], [-116.82, 38.68], [-116.47, 38.53], [-116.25, 38.0], [-116.35, 37.75], [-116.25, 37.5], [-116.35, 37.25], [-116.25, 37.0], [-116.35, 36.75], [-116.25, 36.5], [-116.47, 35.97], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.75, 36.5], [-118.65, 36.75], [-118.75, 37.0], [-118.65, 37.25], [-118.75, 37.5], [-118.65, 37.75], [-118.68, 37.82], [-119.03, 37.97], [-119.25, 38.5], [-119.15, 38.75], [-119.25, 39.0], [-119.15, 39.25], [-119.18, 39.32], [-119.53, 39.47]]]]}, "2022-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.53, 39.47], [-119.75, 40.0], [-119.53, 40.53], [-119.18, 40.68], [-119.03, 41.03], [-118.68, 41.18], [-118.53, 41.53], [-118.0, 41.75], [-117.75, 41.65], [-117.5, 41.75], [-116.97, 41.53], [-116.75, 41.0], [-116.85, 40.75], [-116.75, 40.5], [-116.85, 40.25], [-116.75, 40.0], [-116.85, 39.75], [-116.75, 39.5], [-116.85, 39.25], [-116.75, 39.0], [-116.85, 38.75], [-116.82, 38.68], [-116.47, 38.53], [-116.25, 38.0], [-116.35, 37.75], [-116.25, 37.5], [-116.35, 37.25], [-116.25, 37.0], [-116.35, 36.75], [-116.25, 36.5], [-116.47, 35.97], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.75, 36.5], [-118.65, 36.75], [-118.75, 37.0], [-118.65, 37.25], [-118.75, 37.5], [-118.65, 37.75], [-118.68, 37.82], [-119.03, 37.97], [-119.25, 38.5], [-119.15, 38.75], [-119.25, 39.0], [-119.15, 39.25], [-119.18, 39.32], [-119.53, 39.47]]]]}, "2022-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.53, 39.47], [-119.75, 40.0], [-119.53, 40.53], [-119.18, 40.68], [-119.03, 41.03], [-118.68, 41.18], [-118.53, 41.53], [-118.0, 41.75], [-117.75, 41.65], [-117.5, 41.75], [-116.97, 41.53], [-116.75, 41.0], [-116.85, 40.75], [-116.75, 40.5], [-116.85, 40.25], [-116.75, 40.0], [-116.85, 39.75], [-116.75, 39.5], [-116.85, 39.25], [-116.75, 39.0], [-116.85, 38.75], [-116.82, 38.68], [-116.47, 38.53], [-116.25, 38.0], [-116.35, 37.75], [-116.25, 37.5], [-116.35, 37.25], [-116.25, 37.0], [-116.35, 36.75], [-116.25, 36.5], [-116.47, 35.97], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.75, 36.5], [-118.65, 36.75], [-118.75, 37.0], [-118.65, 37.25], [-118.75, 37.5], [-118.65, 37.75], [-118.68, 37.82], [-119.03, 37.97], [-119.25, 38.5], [-119.15, 38.75], [-119.25, 39.0], [-119.15, 39.25], [-119.18, 39.32], [-119.53, 39.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.019911761776257}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.8261213541854024}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.50985501942938, 14.744816289296807, 16.603091076446503]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.945251270956817, 9.205546941660202, 10.966862020282576]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.684045489133156, -7.670417187603167, -6.123901385819884]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.05126531744861, -9.019911761776257, -6.855892784990488]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6691373866070474, -1.946371632672726, -1.610806010334848]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9655716268394154, -2.233104515841957, -1.9050124419920953]}}