{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:44.763854", "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": "2023-Jun-12_to_2023-Jun-14_260.0_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": 2023060000449}, "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 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 14 2023"}, "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": 101547.7032293611}, "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": 260.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 255.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 37.5], [-105.03, 38.03], [-104.5, 38.25], [-104.25, 38.15], [-104.0, 38.25], [-103.75, 38.15], [-103.5, 38.25], [-102.97, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.03, 38.03], [-101.68, 38.18], [-101.53, 38.53], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.47, 38.53], [-99.25, 38.0], [-99.37, 37.7], [-99.25, 37.65], [-99.0, 37.75], [-98.47, 37.53], [-98.25, 37.0], [-98.35, 36.75], [-98.25, 36.5], [-98.47, 35.97], [-99.0, 35.75], [-99.25, 35.85], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.32, 35.82], [-100.47, 35.47], [-100.82, 35.32], [-100.97, 34.97], [-101.5, 34.75], [-102.0, 34.96], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.53, 34.97], [-103.68, 35.32], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.5, 35.25], [-105.03, 35.47], [-105.25, 36.0], [-105.15, 36.25], [-105.25, 36.5], [-105.04, 37.0], [-105.25, 37.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03999999999999, 37.0], [-105.25, 37.5], [-105.03, 38.03], [-104.5, 38.25], [-104.25, 38.15], [-104.0, 38.25], [-103.75, 38.15], [-103.5, 38.25], [-102.97000000000003, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.02999999999997, 38.03], [-101.68, 38.18], [-101.52999999999997, 38.53], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.47000000000003, 38.53], [-99.25, 38.0], [-99.37, 37.7], [-99.25, 37.65], [-99.0, 37.75], [-98.47000000000003, 37.53], [-98.25, 37.0], [-98.35000000000002, 36.75], [-98.25, 36.5], [-98.47000000000003, 35.97], [-99.0, 35.75], [-99.25, 35.85], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.32, 35.82], [-100.47000000000003, 35.47], [-100.82, 35.32], [-100.97000000000003, 34.97], [-101.5, 34.75], [-102.0, 34.96], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.52999999999997, 34.97], [-103.68, 35.32], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.5, 35.25], [-105.03, 35.47], [-105.25, 36.0], [-105.15, 36.25], [-105.25, 36.5]]]]}, "2023-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03999999999999, 37.0], [-105.25, 37.5], [-105.03, 38.03], [-104.5, 38.25], [-104.25, 38.15], [-104.0, 38.25], [-103.75, 38.15], [-103.5, 38.25], [-102.97000000000003, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.02999999999997, 38.03], [-101.68, 38.18], [-101.52999999999997, 38.53], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.47000000000003, 38.53], [-99.25, 38.0], [-99.37, 37.7], [-99.25, 37.65], [-99.0, 37.75], [-98.47000000000003, 37.53], [-98.25, 37.0], [-98.35000000000002, 36.75], [-98.25, 36.5], [-98.47000000000003, 35.97], [-99.0, 35.75], [-99.25, 35.85], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.32, 35.82], [-100.47000000000003, 35.47], [-100.82, 35.32], [-100.97000000000003, 34.97], [-101.5, 34.75], [-102.0, 34.96], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.52999999999997, 34.97], [-103.68, 35.32], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.5, 35.25], [-105.03, 35.47], [-105.25, 36.0], [-105.15, 36.25], [-105.25, 36.5]]]]}, "2023-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03999999999999, 37.0], [-105.25, 37.5], [-105.03, 38.03], [-104.5, 38.25], [-104.25, 38.15], [-104.0, 38.25], [-103.75, 38.15], [-103.5, 38.25], [-102.97000000000003, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.02999999999997, 38.03], [-101.68, 38.18], [-101.52999999999997, 38.53], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.47000000000003, 38.53], [-99.25, 38.0], [-99.37, 37.7], [-99.25, 37.65], [-99.0, 37.75], [-98.47000000000003, 37.53], [-98.25, 37.0], [-98.35000000000002, 36.75], [-98.25, 36.5], [-98.47000000000003, 35.97], [-99.0, 35.75], [-99.25, 35.85], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.32, 35.82], [-100.47000000000003, 35.47], [-100.82, 35.32], [-100.97000000000003, 34.97], [-101.5, 34.75], [-102.0, 34.96], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.52999999999997, 34.97], [-103.68, 35.32], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.5, 35.25], [-105.03, 35.47], [-105.25, 36.0], [-105.15, 36.25], [-105.25, 36.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.4898447555126495}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.536963615039671}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.07559558114076, 16.708689953935902, 18.408317200248007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.929127719630003, 12.972329194715371, 14.678664496237047]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.643550622457397, -6.224079926567267, -4.743260296094345]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.411289857989971, -7.4898447555126495, -5.49086798299254]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6658185775048773, -1.8687818114517734, -1.4714631168995433]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.927839010701049, -2.2245178075423175, -1.6447460937160099]}}