{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:05.522951", "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-26_to_2022-Jun-28_258.5_37.5"}, "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": 2022060001189}, "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 26 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 28 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": 56499.00816296883}, "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": 37.5}, "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": 258.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 257.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "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": [[[[-103.18, 38.18], [-103.03, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.75, 38.65], [-101.5, 38.75], [-101.25, 38.65], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.75, 38.65], [-99.5, 38.75], [-98.97, 38.53], [-98.75, 38.0], [-98.97, 37.47], [-99.32, 37.32], [-99.47, 36.97], [-99.82, 36.82], [-99.85, 36.75], [-99.75, 36.5], [-99.97, 35.97], [-100.32, 35.82], [-100.47, 35.47], [-101.0, 35.25], [-101.53, 35.47], [-101.75, 36.0], [-101.65, 36.25], [-101.68, 36.32], [-101.75, 36.35], [-102.0, 36.25], [-102.25, 36.35], [-102.5, 36.25], [-102.75, 36.35], [-103.0, 36.25], [-103.53, 36.47], [-103.75, 37.0], [-103.65, 37.25], [-103.75, 37.5], [-103.53, 38.03], [-103.18, 38.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 37.5], [-103.52999999999997, 38.03], [-103.18, 38.18], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.75, 38.65], [-101.5, 38.75], [-101.25, 38.65], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.75, 38.65], [-99.5, 38.75], [-98.97000000000003, 38.53], [-98.75, 38.0], [-98.97000000000003, 37.47], [-99.32, 37.32], [-99.47000000000003, 36.97], [-99.82, 36.82], [-99.85000000000002, 36.75], [-99.75, 36.5], [-99.97000000000003, 35.97], [-100.32, 35.82], [-100.47000000000003, 35.47], [-101.0, 35.25], [-101.52999999999997, 35.47], [-101.75, 36.0], [-101.64999999999998, 36.25], [-101.68, 36.32], [-101.75, 36.35], [-102.0, 36.25], [-102.25, 36.35], [-102.5, 36.25], [-102.75, 36.35], [-103.0, 36.25], [-103.52999999999997, 36.47], [-103.75, 37.0], [-103.64999999999998, 37.25], [-103.75, 37.5]]]]}, "2022-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 37.5], [-103.52999999999997, 38.03], [-103.18, 38.18], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.75, 38.65], [-101.5, 38.75], [-101.25, 38.65], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.75, 38.65], [-99.5, 38.75], [-98.97000000000003, 38.53], [-98.75, 38.0], [-98.97000000000003, 37.47], [-99.32, 37.32], [-99.47000000000003, 36.97], [-99.82, 36.82], [-99.85000000000002, 36.75], [-99.75, 36.5], [-99.97000000000003, 35.97], [-100.32, 35.82], [-100.47000000000003, 35.47], [-101.0, 35.25], [-101.52999999999997, 35.47], [-101.75, 36.0], [-101.64999999999998, 36.25], [-101.68, 36.32], [-101.75, 36.35], [-102.0, 36.25], [-102.25, 36.35], [-102.5, 36.25], [-102.75, 36.35], [-103.0, 36.25], [-103.52999999999997, 36.47], [-103.75, 37.0], [-103.64999999999998, 37.25], [-103.75, 37.5]]]]}, "2022-06-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 37.5], [-103.52999999999997, 38.03], [-103.18, 38.18], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.75, 38.65], [-101.5, 38.75], [-101.25, 38.65], [-101.0, 38.75], [-100.75, 38.65], [-100.5, 38.75], [-100.25, 38.65], [-100.0, 38.75], [-99.75, 38.65], [-99.5, 38.75], [-98.97000000000003, 38.53], [-98.75, 38.0], [-98.97000000000003, 37.47], [-99.32, 37.32], [-99.47000000000003, 36.97], [-99.82, 36.82], [-99.85000000000002, 36.75], [-99.75, 36.5], [-99.97000000000003, 35.97], [-100.32, 35.82], [-100.47000000000003, 35.47], [-101.0, 35.25], [-101.52999999999997, 35.47], [-101.75, 36.0], [-101.64999999999998, 36.25], [-101.68, 36.32], [-101.75, 36.35], [-102.0, 36.25], [-102.25, 36.35], [-102.5, 36.25], [-102.75, 36.35], [-103.0, 36.25], [-103.52999999999997, 36.47], [-103.75, 37.0], [-103.64999999999998, 37.25], [-103.75, 37.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.71091030554038}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.563731032636919}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.42109838805402, 16.218559038626722, 19.080292387460986]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.29182050267599, 14.628908816679484, 17.4840242763388]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.941479567915515, -9.288791162441566, -6.460922367553678]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.0585845996859, -10.71091030554038, -7.977029390209964]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0266362990022473, -2.631177068351401, -1.8221051295104]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6667054439887505, -3.0305741160558806, -2.1819161607995423]}}