{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:25.118115", "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-Jan-24_to_2023-Jan-27_318.5_-3.0"}, "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": 2023010001124}, "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 24 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 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": 108025.59323348803}, "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": ["Atlantic 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": -3.0}, "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": 318.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "318.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 317.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 320.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -1.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-43.03, -0.97], [-42.5, -0.75], [-42.25, -0.85], [-42.0, -0.75], [-41.75, -0.85], [-41.5, -0.75], [-41.25, -0.85], [-41.0, -0.75], [-40.75, -0.85], [-40.5, -0.75], [-39.97, -0.97], [-39.75, -1.5], [-39.97, -2.03], [-40.32, -2.18], [-40.35, -2.25], [-40.32, -2.32], [-40.25, -2.35], [-40.0, -2.25], [-39.47, -2.47], [-39.25, -3.0], [-39.35, -3.25], [-39.25, -3.5], [-39.35, -3.75], [-39.25, -4.0], [-39.47, -4.53], [-39.87, -4.7], [-39.75, -5.0], [-39.97, -5.53], [-40.5, -5.75], [-41.0, -5.54], [-41.5, -5.75], [-42.03, -5.53], [-42.25, -5.0], [-42.15, -4.75], [-42.18, -4.68], [-42.53, -4.53], [-42.68, -4.18], [-43.03, -4.03], [-43.25, -3.5], [-43.15, -3.25], [-43.18, -3.18], [-43.53, -3.03], [-43.75, -2.5], [-43.65, -2.25], [-43.75, -2.0], [-43.53, -1.47], [-43.18, -1.32], [-43.03, -0.97]]]]}}, "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": {"2023-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.75, -2.0], [-43.52999999999997, -1.47], [-43.18000000000001, -1.32], [-43.02999999999997, -0.97], [-42.5, -0.75], [-42.25, -0.85], [-42.0, -0.75], [-41.75, -0.85], [-41.5, -0.75], [-41.25, -0.85], [-41.0, -0.75], [-40.75, -0.85], [-40.5, -0.75], [-39.97000000000003, -0.97], [-39.75, -1.5], [-39.97000000000003, -2.03], [-40.31999999999999, -2.18], [-40.35000000000002, -2.25], [-40.31999999999999, -2.32], [-40.25, -2.35], [-40.0, -2.25], [-39.47000000000003, -2.47], [-39.25, -3.0], [-39.35000000000002, -3.25], [-39.25, -3.5], [-39.35000000000002, -3.75], [-39.25, -4.0], [-39.47000000000003, -4.53], [-39.870000000000005, -4.7], [-39.75, -5.0], [-39.97000000000003, -5.53], [-40.5, -5.75], [-41.0, -5.54], [-41.5, -5.75], [-42.02999999999997, -5.53], [-42.25, -5.0], [-42.14999999999998, -4.75], [-42.18000000000001, -4.68], [-42.52999999999997, -4.53], [-42.68000000000001, -4.18], [-43.02999999999997, -4.03], [-43.25, -3.5], [-43.14999999999998, -3.25], [-43.18000000000001, -3.18], [-43.52999999999997, -3.03], [-43.75, -2.5], [-43.64999999999998, -2.25], [-43.75, -2.0]]]]}, "2023-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.75, -2.0], [-43.52999999999997, -1.47], [-43.18000000000001, -1.32], [-43.02999999999997, -0.97], [-42.5, -0.75], [-42.25, -0.85], [-42.0, -0.75], [-41.75, -0.85], [-41.5, -0.75], [-41.25, -0.85], [-41.0, -0.75], [-40.75, -0.85], [-40.5, -0.75], [-39.97000000000003, -0.97], [-39.75, -1.5], [-39.97000000000003, -2.03], [-40.31999999999999, -2.18], [-40.35000000000002, -2.25], [-40.31999999999999, -2.32], [-40.25, -2.35], [-40.0, -2.25], [-39.47000000000003, -2.47], [-39.25, -3.0], [-39.35000000000002, -3.25], [-39.25, -3.5], [-39.35000000000002, -3.75], [-39.25, -4.0], [-39.47000000000003, -4.53], [-39.870000000000005, -4.7], [-39.75, -5.0], [-39.97000000000003, -5.53], [-40.5, -5.75], [-41.0, -5.54], [-41.5, -5.75], [-42.02999999999997, -5.53], [-42.25, -5.0], [-42.14999999999998, -4.75], [-42.18000000000001, -4.68], [-42.52999999999997, -4.53], [-42.68000000000001, -4.18], [-43.02999999999997, -4.03], [-43.25, -3.5], [-43.14999999999998, -3.25], [-43.18000000000001, -3.18], [-43.52999999999997, -3.03], [-43.75, -2.5], [-43.64999999999998, -2.25], [-43.75, -2.0]]]]}, "2023-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.75, -2.0], [-43.52999999999997, -1.47], [-43.18000000000001, -1.32], [-43.02999999999997, -0.97], [-42.5, -0.75], [-42.25, -0.85], [-42.0, -0.75], [-41.75, -0.85], [-41.5, -0.75], [-41.25, -0.85], [-41.0, -0.75], [-40.75, -0.85], [-40.5, -0.75], [-39.97000000000003, -0.97], [-39.75, -1.5], [-39.97000000000003, -2.03], [-40.31999999999999, -2.18], [-40.35000000000002, -2.25], [-40.31999999999999, -2.32], [-40.25, -2.35], [-40.0, -2.25], [-39.47000000000003, -2.47], [-39.25, -3.0], [-39.35000000000002, -3.25], [-39.25, -3.5], [-39.35000000000002, -3.75], [-39.25, -4.0], [-39.47000000000003, -4.53], [-39.870000000000005, 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"value": -1.894384664519883}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.40376300185386, 24.61554496465976, 24.966971863535605, 23.998343056540875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.06649229476858, 22.01019357869069, 22.16065201767225, 23.998343056540875]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4666968123277702, -2.262899091394833, -1.9441561329332737, -1.7957653039597972]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.809555829615647, -3.927659621366729, -3.5192076746271255, -1.7957653039597972]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.447707753399929, -2.201635799013694, -1.8989962959686741, -1.1726462518781007]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8226229910248555, -2.8686311535352074, -2.3260136390152026, -1.1726462518781007]}}