{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:30.720690", "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": "2021-Nov-20_to_2021-Nov-23_290.5_-55.0"}, "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": 2021110000686}, "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": "November 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 23 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 115517.69028935846}, "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": ["Argentina", "Chile"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": ["Atlantic Ocean", "Pacific Ocean"]}, "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": -55.0}, "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": 290.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -57.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.5, -53.25], [-73.97, -53.47], [-73.82, -53.82], [-73.75, -53.85], [-73.5, -53.75], [-73.25, -53.85], [-73.0, -53.75], [-72.75, -53.85], [-72.5, -53.75], [-72.25, -53.85], [-72.0, -53.75], [-71.75, -53.85], [-71.5, -53.75], [-71.25, -53.85], [-71.0, -53.75], [-70.47, -53.97], [-70.32, -54.32], [-70.25, -54.35], [-70.0, -54.25], [-69.75, -54.35], [-69.62, -54.3], [-69.75, -54.0], [-69.53, -53.47], [-69.0, -53.25], [-68.75, -53.35], [-68.5, -53.25], [-68.25, -53.35], [-68.0, -53.25], [-67.75, -53.35], [-67.5, -53.25], [-66.97, -53.47], [-66.82, -53.82], [-66.47, -53.97], [-66.25, -54.5], [-66.37, -54.8], [-66.25, -54.85], [-66.0, -54.75], [-65.47, -54.97], [-65.25, -55.5], [-65.47, -56.03], [-65.82, -56.18], [-65.85, -56.25], [-65.75, -56.5], [-65.85, -56.75], [-65.75, -57.0], [-65.97, -57.53], [-66.5, -57.75], [-66.75, -57.65], [-67.0, -57.75], [-67.25, -57.65], [-67.5, -57.75], [-67.75, -57.65], [-68.0, -57.75], [-68.25, -57.65], [-68.5, -57.75], [-68.75, -57.65], [-69.0, -57.75], [-69.53, -57.53], [-69.68, -57.18], [-69.75, -57.15], [-70.0, -57.25], [-70.25, -57.15], [-70.5, -57.25], [-71.03, -57.03], [-71.18, -56.68], [-71.25, -56.65], [-71.5, -56.75], [-72.03, -56.53], [-72.18, -56.18], [-72.25, -56.15], [-72.5, -56.25], [-72.75, -56.15], [-73.0, -56.25], [-73.53, -56.03], [-73.75, -55.5], [-73.65, -55.25], [-73.68, -55.18], [-73.75, -55.15], [-74.0, -55.25], [-74.53, -55.03], [-74.68, -54.68], [-75.03, -54.53], [-75.25, -54.0], [-75.03, -53.47], [-74.5, -53.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.South-America", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -54.53], [-75.25, -54.0], [-75.02999999999997, -53.47], [-74.5, -53.25], [-73.97000000000003, -53.47], [-73.82, -53.82], [-73.75, -53.85], [-73.5, -53.75], [-73.25, -53.85], [-73.0, -53.75], [-72.75, -53.85], [-72.5, -53.75], [-72.25, -53.85], [-72.0, -53.75], [-71.75, -53.85], [-71.5, -53.75], [-71.25, -53.85], [-71.0, -53.75], [-70.47000000000003, -53.97], [-70.32, -54.32], [-70.25, -54.35], [-70.0, -54.25], [-69.75, -54.35], [-69.5, -54.25], [-68.97000000000003, -54.47], [-68.82, -54.82], [-68.75, -54.85], [-68.5, -54.75], [-68.25, -54.85], [-68.0, -54.75], [-67.75, -54.85], [-67.5, -54.75], [-67.25, -54.85], [-67.0, -54.75], [-66.75, -54.85], [-66.5, -54.75], [-66.25, -54.85], [-66.0, -54.75], [-65.47000000000003, -54.97], [-65.25, -55.5], [-65.47000000000003, -56.03], [-65.82, -56.18], [-65.85000000000002, -56.25], [-65.75, -56.5], [-65.85000000000002, -56.75], [-65.75, -57.0], [-65.97000000000003, -57.53], [-66.5, -57.75], [-66.75, -57.65], [-67.0, -57.75], [-67.25, -57.65], [-67.5, -57.75], [-67.75, -57.65], [-68.0, -57.75], [-68.25, -57.65], [-68.5, -57.75], [-68.75, -57.65], [-69.0, -57.75], [-69.52999999999997, -57.53], [-69.68, -57.18], [-69.75, -57.15], [-70.0, -57.25], [-70.25, -57.15], [-70.5, -57.25], [-71.02999999999997, -57.03], [-71.18, -56.68], [-71.25, -56.65], [-71.5, -56.75], [-72.02999999999997, -56.53], [-72.18, -56.18], [-72.25, -56.15], [-72.5, -56.25], [-72.75, -56.15], [-73.0, -56.25], [-73.52999999999997, -56.03], [-73.75, -55.5], [-73.64999999999998, -55.25], [-73.68, -55.18], [-73.75, -55.15], [-74.0, -55.25], [-74.52999999999997, -55.03], [-74.68, -54.68], [-75.02999999999997, -54.53]]]]}, "2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -54.53], [-75.25, -54.0], [-75.02999999999997, -53.47], [-74.5, -53.25], [-73.97000000000003, -53.47], [-73.82, -53.82], [-73.75, -53.85], [-73.5, -53.75], [-73.25, -53.85], [-73.0, -53.75], [-72.75, -53.85], [-72.5, -53.75], [-72.25, -53.85], [-72.0, -53.75], [-71.75, -53.85], [-71.5, -53.75], [-71.25, -53.85], [-71.0, -53.75], [-70.47000000000003, -53.97], [-70.32, -54.32], [-70.25, -54.35], [-70.0, -54.25], [-69.75, -54.35], [-69.62, -54.3], [-69.75, -54.0], [-69.52999999999997, -53.47], [-69.0, -53.25], [-68.75, -53.35], [-68.5, -53.25], [-68.25, -53.35], [-68.0, -53.25], [-67.75, -53.35], [-67.5, -53.25], [-66.97000000000003, -53.47], [-66.82, -53.82], [-66.47000000000003, -53.97], [-66.25, -54.5], [-66.37, -54.8], [-66.25, -54.85], [-66.0, -54.75], [-65.47000000000003, -54.97], [-65.25, -55.5], [-65.47000000000003, -56.03], [-65.82, -56.18], [-65.85000000000002, -56.25], [-65.75, -56.5], [-65.85000000000002, -56.75], [-65.75, -57.0], [-65.97000000000003, -57.53], [-66.5, -57.75], [-66.75, -57.65], [-67.0, -57.75], [-67.25, -57.65], [-67.5, -57.75], [-67.75, -57.65], [-68.0, -57.75], [-68.25, -57.65], [-68.5, -57.75], [-68.75, -57.65], [-69.0, -57.75], [-69.52999999999997, -57.53], [-69.68, -57.18], [-69.75, -57.15], [-70.0, -57.25], [-70.25, -57.15], [-70.5, -57.25], [-71.02999999999997, -57.03], [-71.18, -56.68], [-71.25, -56.65], [-71.5, -56.75], [-72.02999999999997, -56.53], [-72.18, -56.18], [-72.25, -56.15], [-72.5, -56.25], [-72.75, -56.15], [-73.0, -56.25], [-73.52999999999997, -56.03], [-73.75, -55.5], [-73.64999999999998, -55.25], [-73.68, -55.18], [-73.75, -55.15], [-74.0, -55.25], [-74.52999999999997, -55.03], [-74.68, -54.68], [-75.02999999999997, -54.53]]]]}, "2021-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -54.53], [-75.25, -54.0], [-75.02999999999997, -53.47], [-74.5, -53.25], [-73.97000000000003, -53.47], [-73.82, -53.82], [-73.75, -53.85], [-73.5, -53.75], [-73.25, -53.85], [-73.0, -53.75], [-72.75, -53.85], [-72.5, -53.75], [-72.25, -53.85], [-72.0, -53.75], [-71.75, -53.85], [-71.5, -53.75], [-71.25, -53.85], [-71.0, -53.75], [-70.47000000000003, -53.97], [-70.32, -54.32], [-70.25, -54.35], [-70.0, -54.25], [-69.75, -54.35], [-69.62, -54.3], [-69.75, -54.0], [-69.52999999999997, -53.47], [-69.0, -53.25], [-68.75, -53.35], [-68.5, -53.25], [-68.25, -53.35], [-68.0, -53.25], [-67.75, -53.35], [-67.5, -53.25], [-66.97000000000003, -53.47], [-66.82, -53.82], [-66.47000000000003, -53.97], [-66.25, -54.5], [-66.37, -54.8], [-66.25, -54.85], [-66.0, -54.75], [-65.47000000000003, -54.97], [-65.25, -55.5], [-65.47000000000003, -56.03], [-65.82, -56.18], [-65.85000000000002, -56.25], [-65.75, -56.5], [-65.85000000000002, -56.75], [-65.75, -57.0], [-65.97000000000003, -57.53], [-66.5, -57.75], [-66.75, -57.65], [-67.0, -57.75], [-67.25, -57.65], [-67.5, -57.75], [-67.75, -57.65], [-68.0, -57.75], [-68.25, -57.65], [-68.5, -57.75], [-68.75, -57.65], [-69.0, -57.75], [-69.52999999999997, -57.53], [-69.68, -57.18], [-69.75, -57.15], [-70.0, -57.25], [-70.25, -57.15], [-70.5, -57.25], [-71.02999999999997, -57.03], [-71.18, -56.68], [-71.25, -56.65], [-71.5, -56.75], [-72.02999999999997, -56.53], [-72.18, -56.18], [-72.25, -56.15], [-72.5, -56.25], [-72.75, -56.15], [-73.0, -56.25], [-73.52999999999997, -56.03], [-73.75, -55.5], [-73.64999999999998, -55.25], [-73.68, -55.18], [-73.75, -55.15], [-74.0, -55.25], [-74.52999999999997, -55.03], [-74.68, -54.68], [-75.02999999999997, -54.53]]]]}, "2021-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.75, -54.0], [-69.52999999999997, -53.47], [-69.0, -53.25], [-68.75, -53.35], [-68.5, -53.25], [-68.25, -53.35], [-68.0, -53.25], [-67.75, -53.35], [-67.5, -53.25], [-66.97000000000003, -53.47], [-66.82, -53.82], [-66.47000000000003, -53.97], [-66.25, -54.5], [-66.47000000000003, -55.03], [-67.0, -55.25], [-67.25, -55.15], [-67.5, -55.25], [-67.75, -55.15], [-68.0, -55.25], [-68.25, -55.15], [-68.32, -55.18], [-68.47000000000003, -55.53], [-69.0, -55.75], [-69.25, -55.65], [-69.5, -55.75], [-70.02999999999997, -55.53], [-70.25, -55.0], [-70.02999999999997, -54.47], [-69.62, -54.3], [-69.75, -54.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.053943959129185}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.524637877552622}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.574002959791642, 3.1582327737112337, 3.324390647152427, 3.7438704603992505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.9882015586206307, 0.00039139878987271004, -0.03492218382433521, 0.8687433405097522]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.223429860819886, -2.75450965318614, -2.5196288555525514, -2.757429398948466]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.9811217590620913, -3.710224935276642, -4.053943959129185, -3.1010838998044505]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.537135927961742, -1.7973217661761296, -1.6738273883932226, -1.3730899340267553]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7296760016259036, -2.0148437550118152, -2.0838214279776746, -1.497202200548777]}}