{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:09.212732", "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-May-10_to_2023-May-12_304.0_2.0"}, "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": 2023050000360}, "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": "May 10 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2023"}, "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": 64821.45197496624}, "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", "Guyana", "Suriname"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 2.0}, "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": 304.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 4.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-57.18, 2.68], [-57.15, 2.75], [-57.18, 2.82], [-57.53, 2.97], [-57.75, 3.5], [-57.65, 3.75], [-57.75, 4.0], [-57.65, 4.25], [-57.75, 4.5], [-57.53, 5.03], [-57.0, 5.25], [-56.75, 5.15], [-56.5, 5.25], [-56.25, 5.15], [-56.0, 5.25], [-55.47, 5.03], [-55.32, 4.68], [-54.97, 4.53], [-54.75, 4.0], [-54.97, 3.47], [-55.5, 3.25], [-55.75, 3.35], [-55.82, 3.32], [-55.85, 3.25], [-55.82, 3.18], [-55.47, 3.03], [-55.25, 2.5], [-55.35, 2.25], [-55.32, 2.18], [-54.97, 2.03], [-54.75, 1.5], [-54.97, 0.97], [-55.32, 0.82], [-55.47, 0.47], [-56.0, 0.25], [-56.25, 0.35], [-56.5, 0.25], [-57.03, 0.47], [-57.18, 0.82], [-57.53, 0.97], [-57.75, 1.5], [-57.65, 1.75], [-57.75, 2.0], [-57.53, 2.53], [-57.18, 2.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.75, 2.0], [-57.52999999999997, 2.53], [-57.18000000000001, 2.68], [-57.14999999999998, 2.75], [-57.18000000000001, 2.82], [-57.52999999999997, 2.97], [-57.75, 3.5], [-57.64999999999998, 3.75], [-57.75, 4.0], [-57.64999999999998, 4.25], [-57.75, 4.5], [-57.52999999999997, 5.03], [-57.0, 5.25], [-56.75, 5.15], [-56.5, 5.25], [-56.25, 5.15], [-56.0, 5.25], [-55.47000000000003, 5.03], [-55.31999999999999, 4.68], [-54.97000000000003, 4.53], [-54.75, 4.0], [-54.97000000000003, 3.47], [-55.5, 3.25], [-55.75, 3.35], [-55.81999999999999, 3.32], [-55.85000000000002, 3.25], [-55.81999999999999, 3.18], [-55.47000000000003, 3.03], [-55.25, 2.5], [-55.35000000000002, 2.25], [-55.31999999999999, 2.18], [-54.97000000000003, 2.03], [-54.75, 1.5], [-54.97000000000003, 0.97], [-55.31999999999999, 0.82], [-55.47000000000003, 0.47], [-56.0, 0.25], [-56.25, 0.35], [-56.5, 0.25], [-57.02999999999997, 0.47], [-57.18000000000001, 0.82], [-57.52999999999997, 0.97], [-57.75, 1.5], [-57.64999999999998, 1.75], [-57.75, 2.0]]]]}, "2023-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.75, 2.0], [-57.52999999999997, 2.53], [-57.18000000000001, 2.68], [-57.14999999999998, 2.75], [-57.18000000000001, 2.82], [-57.52999999999997, 2.97], [-57.75, 3.5], [-57.64999999999998, 3.75], [-57.75, 4.0], [-57.64999999999998, 4.25], [-57.75, 4.5], [-57.52999999999997, 5.03], [-57.0, 5.25], [-56.75, 5.15], [-56.5, 5.25], [-56.25, 5.15], [-56.0, 5.25], [-55.47000000000003, 5.03], [-55.31999999999999, 4.68], [-54.97000000000003, 4.53], [-54.75, 4.0], [-54.97000000000003, 3.47], [-55.5, 3.25], [-55.75, 3.35], [-55.81999999999999, 3.32], [-55.85000000000002, 3.25], [-55.81999999999999, 3.18], [-55.47000000000003, 3.03], [-55.25, 2.5], [-55.35000000000002, 2.25], [-55.31999999999999, 2.18], [-54.97000000000003, 2.03], [-54.75, 1.5], [-54.97000000000003, 0.97], [-55.31999999999999, 0.82], [-55.47000000000003, 0.47], [-56.0, 0.25], [-56.25, 0.35], [-56.5, 0.25], [-57.02999999999997, 0.47], [-57.18000000000001, 0.82], [-57.52999999999997, 0.97], [-57.75, 1.5], [-57.64999999999998, 1.75], [-57.75, 2.0]]]]}, "2023-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.75, 2.0], [-57.52999999999997, 2.53], [-57.18000000000001, 2.68], [-57.14999999999998, 2.75], [-57.18000000000001, 2.82], [-57.52999999999997, 2.97], [-57.75, 3.5], [-57.64999999999998, 3.75], [-57.75, 4.0], [-57.64999999999998, 4.25], [-57.75, 4.5], [-57.52999999999997, 5.03], [-57.0, 5.25], [-56.75, 5.15], [-56.5, 5.25], [-56.25, 5.15], [-56.0, 5.25], [-55.47000000000003, 5.03], [-55.31999999999999, 4.68], [-54.97000000000003, 4.53], [-54.75, 4.0], [-54.97000000000003, 3.47], [-55.5, 3.25], [-55.75, 3.35], [-55.81999999999999, 3.32], [-55.85000000000002, 3.25], [-55.81999999999999, 3.18], [-55.47000000000003, 3.03], [-55.25, 2.5], [-55.35000000000002, 2.25], [-55.31999999999999, 2.18], [-54.97000000000003, 2.03], [-54.75, 1.5], [-54.97000000000003, 0.97], [-55.31999999999999, 0.82], [-55.47000000000003, 0.47], [-56.0, 0.25], [-56.25, 0.35], [-56.5, 0.25], [-57.02999999999997, 0.47], [-57.18000000000001, 0.82], [-57.52999999999997, 0.97], [-57.75, 1.5], [-57.64999999999998, 1.75], [-57.75, 2.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9023721737162873}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4200973347758572}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.540167363532703, 23.8300386829452, 23.550818133279734]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.742035157011912, 23.215769235919765, 22.908169151078994]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4673308347464247, -1.2414168109182837, -1.551544358662863]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7922812625075153, -1.4630109702702043, -1.9023721737162873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9053076916523186, -1.638084178996215, -1.9827915594019787]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3669828531377926, -2.0953660739511792, -2.450527640601606]}}