{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:36.927184", "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-Oct-26_to_2023-Oct-29_302.0_-62.0"}, "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": 2023100000575}, "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": "October 26 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 29 2023"}, "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": 158344.37990741667}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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", "Southern 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": -62.0}, "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": 302.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "302.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 308.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -64.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -60.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-62.53, -60.97], [-62.18, -60.82], [-62.03, -60.47], [-61.5, -60.25], [-61.25, -60.35], [-61.0, -60.25], [-60.75, -60.35], [-60.5, -60.25], [-60.25, -60.35], [-60.0, -60.25], [-59.75, -60.35], [-59.5, -60.25], [-59.25, -60.35], [-59.0, -60.25], [-58.75, -60.35], [-58.5, -60.25], [-58.25, -60.35], [-58.0, -60.25], [-57.75, -60.35], [-57.5, -60.25], [-57.25, -60.35], [-57.0, -60.25], [-56.75, -60.35], [-56.68, -60.32], [-56.53, -59.97], [-56.0, -59.75], [-55.75, -59.85], [-55.5, -59.75], [-54.97, -59.97], [-54.82, -60.32], [-54.75, -60.35], [-54.5, -60.25], [-54.25, -60.35], [-54.0, -60.25], [-53.75, -60.35], [-53.5, -60.25], [-52.97, -60.47], [-52.75, -61.0], [-52.85, -61.25], [-52.82, -61.32], [-52.75, -61.35], [-52.5, -61.25], [-52.25, -61.35], [-52.0, -61.25], [-51.47, -61.47], [-51.25, -62.0], [-51.47, -62.53], [-52.0, -62.75], [-52.25, -62.65], [-52.32, -62.68], [-52.35, -62.75], [-52.25, -63.0], [-52.47, -63.53], [-53.0, -63.75], [-53.25, -63.65], [-53.32, -63.68], [-53.47, -64.03], [-54.0, -64.25], [-54.25, -64.15], [-54.5, -64.25], [-55.03, -64.03], [-55.18, -63.68], [-55.25, -63.65], [-55.32, -63.68], [-55.47, -64.03], [-56.0, -64.25], [-56.25, -64.15], [-56.5, -64.25], [-57.0, -64.04], [-57.5, -64.25], [-57.75, -64.15], [-57.82, -64.18], [-57.97, -64.53], [-58.5, -64.75], [-58.75, -64.65], [-59.0, -64.75], [-59.25, -64.65], [-59.5, -64.75], [-59.75, -64.65], [-59.82, -64.68], [-59.97, -65.03], [-60.5, -65.25], [-60.75, -65.15], [-61.0, -65.25], [-61.53, -65.03], [-61.75, -64.5], [-61.65, -64.25], [-61.75, -64.0], [-61.54, -63.5], [-61.68, -63.18], [-61.75, -63.15], [-62.0, -63.25], [-62.53, -63.03], [-62.75, -62.5], [-62.65, -62.25], [-62.75, -62.0], [-62.65, -61.75], [-62.75, -61.5], [-62.53, -60.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Antarctica", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.75, -62.0], [-62.64999999999998, -61.75], [-62.75, -61.5], [-62.52999999999997, -60.97], [-62.18000000000001, -60.82], [-62.02999999999997, -60.47], [-61.5, -60.25], [-61.25, -60.35], [-61.0, -60.25], [-60.75, -60.35], [-60.5, -60.25], [-60.25, -60.35], [-60.0, -60.25], [-59.75, -60.35], [-59.5, -60.25], [-59.25, -60.35], [-59.0, -60.25], [-58.47000000000003, -60.47], [-58.31999999999999, -60.82], [-58.25, -60.85], [-58.0, -60.75], [-57.75, -60.85], [-57.5, -60.75], [-56.97000000000003, -60.97], [-56.81999999999999, -61.32], [-56.47000000000003, -61.47], [-56.25, -62.0], [-56.35000000000002, -62.25], [-56.31999999999999, -62.32], [-55.97000000000003, -62.47], [-55.75, -63.0], [-55.97000000000003, -63.53], [-56.5, -63.75], [-56.75, -63.65], [-56.81999999999999, -63.68], [-56.97000000000003, -64.03], [-57.5, -64.25], [-57.75, -64.15], [-57.81999999999999, -64.18], [-57.97000000000003, -64.53], [-58.5, -64.75], [-58.75, -64.65], [-59.0, -64.75], [-59.25, -64.65], [-59.5, -64.75], [-59.75, -64.65], [-59.81999999999999, -64.68], [-59.97000000000003, -65.03], [-60.5, -65.25], [-60.75, -65.15], [-61.0, -65.25], [-61.52999999999997, -65.03], [-61.75, -64.5], [-61.64999999999998, -64.25], [-61.75, -64.0], [-61.54000000000002, -63.5], [-61.68000000000001, -63.18], [-61.75, -63.15], [-62.0, -63.25], [-62.52999999999997, -63.03], [-62.75, -62.5], [-62.64999999999998, -62.25], [-62.75, -62.0]]]]}, "2023-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.75, -62.0], [-62.64999999999998, -61.75], [-62.75, -61.5], [-62.52999999999997, -60.97], [-62.18000000000001, -60.82], [-62.02999999999997, -60.47], [-61.5, -60.25], [-61.25, -60.35], [-61.0, -60.25], [-60.75, -60.35], [-60.5, -60.25], [-60.25, -60.35], [-60.0, -60.25], [-59.75, -60.35], [-59.5, -60.25], [-59.25, -60.35], [-59.0, -60.25], [-58.75, -60.35], [-58.5, -60.25], [-58.25, -60.35], [-58.0, -60.25], [-57.75, -60.35], [-57.5, -60.25], [-57.25, -60.35], [-57.0, -60.25], [-56.75, -60.35], [-56.68000000000001, -60.32], [-56.52999999999997, -59.97], [-56.0, -59.75], [-55.75, -59.85], [-55.5, -59.75], [-54.97000000000003, -59.97], [-54.81999999999999, -60.32], [-54.75, -60.35], [-54.5, -60.25], [-54.25, -60.35], [-54.0, -60.25], [-53.75, -60.35], [-53.5, -60.25], [-52.97000000000003, -60.47], [-52.75, -61.0], [-52.85000000000002, -61.25], [-52.81999999999999, -61.32], [-52.75, -61.35], [-52.5, -61.25], [-52.25, -61.35], [-52.0, -61.25], [-51.47000000000003, -61.47], [-51.25, -62.0], [-51.47000000000003, -62.53], [-52.0, -62.75], [-52.25, -62.65], [-52.31999999999999, -62.68], [-52.35000000000002, -62.75], [-52.25, -63.0], [-52.47000000000003, -63.53], [-53.0, -63.75], [-53.25, -63.65], [-53.31999999999999, -63.68], [-53.47000000000003, -64.03], [-54.0, -64.25], [-54.25, -64.15], [-54.5, -64.25], [-55.02999999999997, -64.03], [-55.18000000000001, -63.68], [-55.25, -63.65], [-55.31999999999999, -63.68], [-55.47000000000003, -64.03], [-56.0, -64.25], [-56.25, -64.15], [-56.5, -64.25], [-57.0, -64.04], [-57.5, -64.25], [-57.75, -64.15], [-57.81999999999999, -64.18], [-57.97000000000003, -64.53], [-58.5, -64.75], [-58.75, -64.65], [-59.0, -64.75], [-59.25, -64.65], [-59.5, -64.75], [-59.75, -64.65], [-59.81999999999999, -64.68], [-59.97000000000003, -65.03], [-60.5, -65.25], [-60.75, -65.15], [-61.0, -65.25], [-61.52999999999997, -65.03], [-61.75, -64.5], [-61.64999999999998, -64.25], [-61.75, -64.0], [-61.54000000000002, -63.5], [-61.68000000000001, -63.18], [-61.75, -63.15], [-62.0, -63.25], [-62.52999999999997, -63.03], [-62.75, -62.5], [-62.64999999999998, -62.25], [-62.75, -62.0]]]]}, "2023-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.75, -62.0], [-62.64999999999998, -61.75], [-62.75, -61.5], [-62.52999999999997, -60.97], [-62.18000000000001, -60.82], [-62.02999999999997, -60.47], [-61.5, -60.25], [-61.25, -60.35], [-61.0, -60.25], [-60.75, -60.35], [-60.5, -60.25], [-60.25, -60.35], [-60.0, -60.25], [-59.75, -60.35], [-59.5, -60.25], [-59.25, -60.35], [-59.0, -60.25], [-58.75, -60.35], [-58.5, -60.25], [-58.25, -60.35], [-58.0, -60.25], [-57.75, -60.35], [-57.5, -60.25], [-57.25, -60.35], [-57.0, -60.25], [-56.75, -60.35], [-56.68000000000001, -60.32], [-56.52999999999997, -59.97], [-56.0, -59.75], [-55.75, -59.85], [-55.5, -59.75], [-54.97000000000003, -59.97], [-54.81999999999999, -60.32], [-54.75, -60.35], [-54.5, -60.25], [-54.25, -60.35], [-54.0, -60.25], [-53.75, -60.35], [-53.5, -60.25], [-52.97000000000003, -60.47], [-52.75, -61.0], [-52.85000000000002, -61.25], [-52.81999999999999, -61.32], [-52.75, -61.35], [-52.5, -61.25], [-52.25, -61.35], [-52.0, -61.25], [-51.47000000000003, -61.47], [-51.25, -62.0], [-51.47000000000003, -62.53], [-52.0, -62.75], [-52.25, -62.65], [-52.31999999999999, -62.68], [-52.35000000000002, -62.75], [-52.25, -63.0], [-52.47000000000003, -63.53], [-53.0, -63.75], [-53.25, -63.65], [-53.31999999999999, -63.68], [-53.47000000000003, -64.03], [-54.0, -64.25], [-54.25, -64.15], [-54.5, -64.25], [-55.02999999999997, -64.03], [-55.18000000000001, -63.68], [-55.25, -63.65], [-55.31999999999999, -63.68], [-55.47000000000003, -64.03], [-56.0, -64.25], [-56.25, -64.15], [-56.5, -64.25], [-57.0, -64.04], [-57.5, -64.25], [-57.75, -64.15], [-57.81999999999999, -64.18], [-57.97000000000003, -64.53], [-58.5, -64.75], [-58.75, -64.65], [-59.0, -64.75], [-59.25, -64.65], [-59.5, -64.75], [-59.75, -64.65], [-59.81999999999999, -64.68], [-59.97000000000003, -65.03], [-60.5, -65.25], [-60.75, -65.15], [-61.0, -65.25], [-61.52999999999997, -65.03], [-61.75, -64.5], [-61.64999999999998, -64.25], [-61.75, -64.0], [-61.54000000000002, -63.5], [-61.68000000000001, -63.18], [-61.75, -63.15], [-62.0, -63.25], [-62.52999999999997, -63.03], [-62.75, -62.5], [-62.64999999999998, -62.25], [-62.75, -62.0]]]]}, "2023-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.75, -62.0], [-62.64999999999998, -61.75], [-62.75, -61.5], [-62.52999999999997, -60.97], [-62.18000000000001, -60.82], [-62.02999999999997, -60.47], [-61.5, -60.25], [-61.25, -60.35], [-61.0, -60.25], [-60.75, -60.35], [-60.5, -60.25], [-60.25, -60.35], [-60.0, -60.25], [-59.75, -60.35], [-59.5, -60.25], [-59.25, -60.35], [-59.0, -60.25], [-58.75, -60.35], [-58.5, -60.25], [-58.25, -60.35], [-58.0, -60.25], [-57.75, -60.35], [-57.5, -60.25], [-57.25, -60.35], [-57.0, -60.25], [-56.75, -60.35], [-56.68000000000001, -60.32], [-56.52999999999997, -59.97], [-56.0, -59.75], [-55.75, -59.85], [-55.5, -59.75], [-54.97000000000003, -59.97], [-54.81999999999999, -60.32], [-54.75, -60.35], [-54.5, -60.25], [-54.25, -60.35], [-54.0, -60.25], [-53.75, -60.35], [-53.5, -60.25], [-52.97000000000003, -60.47], [-52.75, -61.0], [-52.85000000000002, -61.25], [-52.81999999999999, -61.32], [-52.75, -61.35], [-52.5, -61.25], [-52.25, -61.35], [-52.0, -61.25], [-51.47000000000003, -61.47], [-51.25, -62.0], [-51.47000000000003, -62.53], [-52.0, -62.75], [-52.25, -62.65], [-52.31999999999999, -62.68], [-52.35000000000002, -62.75], [-52.25, -63.0], [-52.47000000000003, -63.53], [-53.0, -63.75], [-53.25, -63.65], [-53.31999999999999, -63.68], [-53.47000000000003, -64.03], [-54.0, -64.25], [-54.25, -64.15], [-54.5, -64.25], [-55.02999999999997, -64.03], [-55.18000000000001, -63.68], [-55.25, -63.65], [-55.31999999999999, -63.68], [-55.47000000000003, -64.03], [-56.0, -64.25], [-56.25, -64.15], [-56.5, -64.25], [-57.0, -64.04], [-57.5, -64.25], [-57.75, -64.15], [-57.81999999999999, -64.18], [-57.97000000000003, -64.53], [-58.5, -64.75], [-58.75, -64.65], [-59.0, -64.75], [-59.25, -64.65], [-59.5, -64.75], [-59.75, -64.65], [-59.81999999999999, -64.68], [-59.97000000000003, -65.03], [-60.5, -65.25], [-60.75, -65.15], [-61.0, -65.25], [-61.52999999999997, -65.03], [-61.75, -64.5], [-61.64999999999998, -64.25], [-61.75, -64.0], [-61.54000000000002, -63.5], [-61.68000000000001, -63.18], [-61.75, -63.15], [-62.0, -63.25], [-62.52999999999997, -63.03], [-62.75, -62.5], [-62.64999999999998, -62.25], [-62.75, -62.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.880497036876221}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.6278767145539526}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.854933256187053, -6.878205289937796, -6.933996020210998, -7.994142524641859]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.003152259751886, -17.750836332096895, -19.315278865029626, -18.683508347737614]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.913427766015638, -4.297717360645714, -4.430904599388276, -5.544707610103318]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.880497036876221, -6.881044569078142, -8.70853409710162, -8.61448308321178]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7261872108751044, -1.8624154130541113, -1.8523766570172837, -2.3610609115725647]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2130255599074196, -2.4165739786886173, -2.669046487670559, -2.9893702365413897]}}