{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:51.240548", "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-Aug-02_to_2025-Aug-05_315.0_-18.0"}, "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": 2025080000171}, "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": "August 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 05 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": 53114.166144936054}, "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": ["Brazil"]}, "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": -18.0}, "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": 315.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "315.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 313.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 315.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-47.12, -17.7], [-47.53, -17.53], [-47.75, -17.0], [-47.65, -16.75], [-47.75, -16.5], [-47.53, -15.97], [-47.0, -15.75], [-46.7, -15.88], [-46.65, -15.75], [-46.75, -15.5], [-46.53, -14.97], [-46.0, -14.75], [-45.47, -14.97], [-45.25, -15.5], [-45.35, -15.75], [-45.32, -15.82], [-44.97, -15.97], [-44.75, -16.5], [-44.85, -16.75], [-44.82, -16.82], [-44.47, -16.97], [-44.25, -17.5], [-44.35, -17.75], [-44.25, -18.0], [-44.47, -18.53], [-44.82, -18.68], [-44.97, -19.03], [-45.32, -19.18], [-45.47, -19.53], [-46.0, -19.75], [-46.53, -19.53], [-46.75, -19.0], [-46.65, -18.75], [-46.68, -18.68], [-47.03, -18.53], [-47.25, -18.0], [-47.12, -17.7]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-47.75, -16.5], [-47.52999999999997, -15.97], [-47.0, -15.75], [-46.69999999999999, -15.88], [-46.64999999999998, -15.75], [-46.75, -15.5], [-46.52999999999997, -14.97], [-46.0, -14.75], [-45.47000000000003, -14.97], [-45.25, -15.5], [-45.35000000000002, -15.75], [-45.31999999999999, -15.82], [-44.97000000000003, -15.97], [-44.75, -16.5], [-44.85000000000002, -16.75], [-44.81999999999999, -16.82], [-44.47000000000003, -16.97], [-44.25, -17.5], [-44.35000000000002, -17.75], [-44.25, -18.0], [-44.47000000000003, -18.53], [-44.81999999999999, -18.68], [-44.97000000000003, -19.03], [-45.31999999999999, -19.18], [-45.47000000000003, -19.53], [-46.0, -19.75], [-46.52999999999997, -19.53], [-46.75, -19.0], [-46.64999999999998, -18.75], [-46.75, -18.5], [-46.54000000000002, -18.0], [-46.68000000000001, -17.68], [-46.75, -17.65], [-47.0, -17.75], [-47.52999999999997, -17.53], [-47.75, -17.0], [-47.64999999999998, -16.75], [-47.75, -16.5]]]]}, "2025-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-47.75, -16.5], [-47.52999999999997, -15.97], [-47.0, -15.75], [-46.69999999999999, -15.88], [-46.64999999999998, -15.75], [-46.75, -15.5], [-46.52999999999997, -14.97], [-46.0, -14.75], [-45.47000000000003, -14.97], [-45.25, -15.5], [-45.35000000000002, -15.75], [-45.31999999999999, -15.82], [-44.97000000000003, -15.97], [-44.75, -16.5], [-44.85000000000002, -16.75], [-44.81999999999999, -16.82], [-44.47000000000003, -16.97], [-44.25, -17.5], [-44.35000000000002, -17.75], [-44.25, -18.0], [-44.47000000000003, -18.53], [-44.81999999999999, -18.68], [-44.97000000000003, -19.03], [-45.31999999999999, -19.18], [-45.47000000000003, -19.53], [-46.0, -19.75], [-46.52999999999997, -19.53], [-46.75, -19.0], [-46.64999999999998, -18.75], [-46.68000000000001, -18.68], [-47.02999999999997, -18.53], [-47.25, -18.0], [-47.120000000000005, -17.7], [-47.52999999999997, -17.53], [-47.75, -17.0], [-47.64999999999998, -16.75], [-47.75, -16.5]]]]}, "2025-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-47.75, -16.5], [-47.52999999999997, -15.97], [-47.0, -15.75], [-46.69999999999999, -15.88], [-46.64999999999998, -15.75], [-46.75, -15.5], [-46.52999999999997, -14.97], [-46.0, -14.75], [-45.47000000000003, -14.97], [-45.25, -15.5], [-45.35000000000002, -15.75], [-45.31999999999999, -15.82], [-44.97000000000003, -15.97], [-44.75, -16.5], [-44.85000000000002, -16.75], [-44.81999999999999, -16.82], [-44.47000000000003, -16.97], [-44.25, -17.5], [-44.35000000000002, -17.75], [-44.25, -18.0], [-44.47000000000003, -18.53], [-44.81999999999999, -18.68], [-44.97000000000003, -19.03], [-45.31999999999999, -19.18], [-45.47000000000003, -19.53], [-46.0, -19.75], [-46.52999999999997, -19.53], [-46.75, -19.0], [-46.64999999999998, -18.75], [-46.68000000000001, -18.68], [-47.02999999999997, -18.53], [-47.25, -18.0], [-47.120000000000005, -17.7], [-47.52999999999997, -17.53], [-47.75, -17.0], [-47.64999999999998, -16.75], [-47.75, -16.5]]]]}, "2025-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.5, -18.75], [-47.02999999999997, -18.53], [-47.25, -18.0], [-47.02999999999997, -17.47], [-46.5, -17.25], [-45.97000000000003, -17.47], [-45.80000000000001, -17.88], [-45.68000000000001, -17.82], [-45.52999999999997, -17.47], [-45.0, -17.25], [-44.47000000000003, -17.47], [-44.25, -18.0], [-44.47000000000003, -18.53], [-44.81999999999999, -18.68], [-44.97000000000003, -19.03], [-45.5, -19.25], [-46.02999999999997, -19.03], [-46.19999999999999, -18.62], [-46.5, -18.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.363152148074164}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4011175931126596}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.832437881768954, 18.87748037267619, 19.625976534242966, 19.65051506890194]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.54326527913412, 16.671023305257165, 17.619565582275413, 19.534900919596396]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9667611213765814, -2.9784296658692395, -2.3252635030027022, -1.8537230370707032]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4332179904400846, -3.363152148074164, -2.6208202739470607, -1.8898481606029236]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.412305016509492, -2.0898894998329665, -1.6256540177670606, -1.2971836155679675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7384783977727776, -2.3398278514396966, -1.8689097142019846, -1.3472660915758516]}}