{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:56.200288", "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": "2025-Jan-13_to_2025-Jan-16_291.5_-21.0"}, "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": 2025010000378}, "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": "January 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2025"}, "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": 60992.83475779974}, "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": ["Bolivia, Plurinational State of", "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": []}, "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": -21.0}, "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": 291.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "291.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 291.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 293.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-66.25, -19.5], [-66.35, -19.75], [-66.32, -19.82], [-65.97, -19.97], [-65.75, -20.5], [-65.97, -21.03], [-66.32, -21.18], [-66.47, -21.53], [-67.0, -21.75], [-67.25, -21.65], [-67.5, -21.75], [-67.75, -21.65], [-68.0, -21.75], [-68.25, -21.65], [-68.5, -21.75], [-69.03, -21.53], [-69.25, -21.0], [-69.15, -20.75], [-69.25, -20.5], [-69.15, -20.25], [-69.25, -20.0], [-69.15, -19.75], [-69.18, -19.68], [-69.53, -19.53], [-69.75, -19.0], [-69.53, -18.47], [-69.18, -18.32], [-69.03, -17.97], [-68.5, -17.75], [-67.97, -17.97], [-67.82, -18.32], [-67.75, -18.35], [-67.5, -18.25], [-66.97, -18.47], [-66.82, -18.82], [-66.47, -18.97], [-66.25, -19.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon", "S.W.South-America", "S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.25, -20.5], [-69.14999999999998, -20.25], [-69.25, -20.0], [-69.14999999999998, -19.75], [-69.25, -19.5], [-69.02999999999997, -18.97], [-68.68, -18.82], [-68.52999999999997, -18.47], [-68.0, -18.25], [-67.75, -18.35], [-67.5, -18.25], [-66.97000000000003, -18.47], [-66.82, -18.82], [-66.47000000000003, -18.97], [-66.25, -19.5], [-66.35000000000002, -19.75], [-66.32, -19.82], [-65.97000000000003, -19.97], [-65.75, -20.5], [-65.97000000000003, -21.03], [-66.32, -21.18], [-66.47000000000003, -21.53], [-67.0, -21.75], [-67.25, -21.65], [-67.5, -21.75], [-67.75, -21.65], [-68.0, -21.75], [-68.25, -21.65], [-68.5, -21.75], [-69.02999999999997, -21.53], [-69.25, -21.0], [-69.14999999999998, -20.75], [-69.25, -20.5]]]]}, "2025-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.52999999999997, -19.53], [-69.75, -19.0], [-69.52999999999997, -18.47], [-69.18, -18.32], [-69.02999999999997, -17.97], [-68.5, -17.75], [-67.97000000000003, -17.97], [-67.82, -18.32], [-67.75, -18.35], [-67.5, -18.25], [-66.97000000000003, -18.47], [-66.82, -18.82], [-66.47000000000003, -18.97], [-66.25, -19.5], [-66.35000000000002, -19.75], [-66.32, -19.82], [-65.97000000000003, -19.97], [-65.75, -20.5], [-65.97000000000003, -21.03], [-66.32, -21.18], [-66.47000000000003, -21.53], [-67.0, -21.75], [-67.25, -21.65], [-67.5, -21.75], [-67.75, -21.65], [-68.0, -21.75], [-68.25, -21.65], [-68.5, -21.75], [-69.02999999999997, -21.53], [-69.25, -21.0], [-69.14999999999998, -20.75], [-69.25, -20.5], [-69.14999999999998, -20.25], [-69.25, -20.0], [-69.14999999999998, -19.75], [-69.18, -19.68], [-69.52999999999997, -19.53]]]]}, "2025-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.52999999999997, -19.53], [-69.75, -19.0], [-69.52999999999997, -18.47], [-69.18, -18.32], [-69.02999999999997, -17.97], [-68.5, -17.75], [-67.97000000000003, -17.97], [-67.82, -18.32], [-67.75, -18.35], [-67.5, -18.25], [-66.97000000000003, -18.47], [-66.82, -18.82], [-66.47000000000003, -18.97], [-66.25, -19.5], [-66.35000000000002, -19.75], [-66.32, -19.82], [-65.97000000000003, -19.97], [-65.75, -20.5], [-65.97000000000003, -21.03], [-66.32, -21.18], [-66.47000000000003, -21.53], [-67.0, -21.75], [-67.25, -21.65], [-67.5, -21.75], [-67.75, -21.65], [-68.0, -21.75], [-68.25, -21.65], [-68.5, -21.75], [-69.02999999999997, -21.53], [-69.25, -21.0], [-69.14999999999998, -20.75], [-69.25, -20.5], [-69.14999999999998, -20.25], [-69.25, -20.0], [-69.14999999999998, -19.75], [-69.18, -19.68], [-69.52999999999997, -19.53]]]]}, "2025-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.02999999999997, -19.97], [-68.5, -19.75], [-68.25, -19.85], [-68.18, -19.82], [-68.02999999999997, -19.47], [-67.68, -19.32], [-67.52999999999997, -18.97], [-67.0, -18.75], [-66.47000000000003, -18.97], [-66.25, -19.5], [-66.35000000000002, -19.75], [-66.25, -20.0], [-66.47000000000003, -20.53], [-66.82, -20.68], [-66.97000000000003, -21.03], [-67.32, -21.18], [-67.47000000000003, -21.53], [-68.0, -21.75], [-68.25, -21.65], [-68.5, -21.75], [-69.02999999999997, -21.53], [-69.25, -21.0], [-69.14999999999998, -20.75], [-69.25, -20.5], [-69.02999999999997, -19.97]]], [[[-68.5, -17.75], [-67.97000000000003, -17.97], [-67.75, -18.5], [-67.97000000000003, -19.03], [-68.32, -19.18], [-68.47000000000003, -19.53], [-69.0, -19.75], [-69.52999999999997, -19.53], [-69.75, -19.0], [-69.52999999999997, -18.47], [-69.18, -18.32], [-69.02999999999997, -17.97], [-68.5, -17.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.123669939667309}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.048795009741629}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.550549276251502, 7.0636570158459335, 7.39852161710229, 6.9037803649902685]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.605720774332724, 2.4497479756673215, 2.4655014038086165, 2.447530364990257]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1265616561673735, -3.3033586906126238, -2.9136426856005153, -2.6502745323999646]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.123669939667309, -4.0847913250514125, -3.6375974671304903, -3.1837049817866045]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7818766766958594, -1.8454874846546214, -1.6306823614151242, -1.5151850100930724]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2692586231829384, -2.2356957040429473, -1.96839510164822, -1.9546125832930568]}}