{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:14.247881", "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": "2021-Apr-29_to_2021-May-02_316.5_-20.0"}, "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": 2021040001157}, "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": "April 29 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2021"}, "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": 51800.850261588064}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": ["South 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": -20.0}, "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": 316.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "316.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 315.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 318.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-44.75, -22.0], [-44.53, -21.47], [-44.0, -21.25], [-43.75, -21.35], [-43.5, -21.25], [-42.97, -21.47], [-42.82, -21.82], [-42.75, -21.85], [-42.5, -21.75], [-42.25, -21.85], [-42.0, -21.75], [-41.47, -21.97], [-41.25, -22.5], [-41.47, -23.03], [-41.82, -23.18], [-41.97, -23.53], [-42.5, -23.75], [-43.03, -23.53], [-43.18, -23.18], [-43.25, -23.15], [-43.5, -23.25], [-44.03, -23.03], [-44.18, -22.68], [-44.53, -22.53], [-44.75, -22.0]]]]}, "2021-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-44.75, -22.0], [-44.53, -21.47], [-44.18, -21.32], [-44.15, -21.25], [-44.18, -21.18], [-44.53, -21.03], [-44.75, -20.5], [-44.53, -19.97], [-44.18, -19.82], [-44.03, -19.47], [-43.5, -19.25], [-42.97, -19.47], [-42.82, -19.82], [-42.75, -19.85], [-42.5, -19.75], [-42.25, -19.85], [-42.0, -19.75], [-41.47, -19.97], [-41.25, -20.5], [-41.35, -20.75], [-41.25, -21.0], [-41.47, -21.53], [-42.0, -21.75], [-41.47, -21.97], [-41.25, -22.5], [-41.47, -23.03], [-41.82, -23.18], [-41.97, -23.53], [-42.5, -23.75], [-43.03, -23.53], [-43.18, -23.18], [-43.25, -23.15], [-43.5, -23.25], [-44.03, -23.03], [-44.18, -22.68], [-44.53, -22.53], [-44.75, -22.0]], [[-42.25, -21.65], [-42.5, -21.75], [-42.25, -21.85], [-42.0, -21.75], [-42.25, -21.65]], [[-42.75, -21.65], [-42.82, -21.68], [-42.85, -21.75], [-42.82, -21.82], [-42.75, -21.85], [-42.5, -21.75], [-42.75, -21.65]]]]}, "2021-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-44.75, -22.0], [-44.53, -21.47], [-44.18, -21.32], [-44.15, -21.25], [-44.18, -21.18], [-44.53, -21.03], [-44.75, -20.5], [-44.53, -19.97], [-44.18, -19.82], [-44.03, -19.47], [-43.5, -19.25], [-42.97, -19.47], [-42.82, -19.82], [-42.75, -19.85], [-42.5, -19.75], [-42.25, -19.85], [-42.0, -19.75], [-41.47, -19.97], [-41.25, -20.5], [-41.35, -20.75], [-41.25, -21.0], [-41.47, -21.53], [-42.0, -21.75], [-41.47, -21.97], [-41.25, -22.5], [-41.47, -23.03], [-41.82, -23.18], [-41.97, -23.53], [-42.5, -23.75], [-43.03, -23.53], [-43.18, -23.18], [-43.25, -23.15], [-43.5, -23.25], [-44.03, -23.03], [-44.18, -22.68], [-44.53, -22.53], [-44.75, -22.0]], [[-42.25, -21.65], [-42.5, -21.75], [-42.25, -21.85], [-42.0, -21.75], [-42.25, -21.65]], [[-42.75, -21.65], [-42.82, -21.68], [-42.85, -21.75], [-42.82, -21.82], [-42.75, -21.85], [-42.5, -21.75], [-42.75, -21.65]]]]}, "2021-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-44.75, -20.5], [-44.53, -19.97], [-44.18, -19.82], [-44.03, -19.47], [-43.5, -19.25], [-42.97, -19.47], [-42.82, -19.82], [-42.75, -19.85], [-42.5, -19.75], [-42.25, -19.85], [-42.0, -19.75], [-41.47, -19.97], [-41.25, -20.5], [-41.35, -20.75], [-41.25, -21.0], [-41.47, -21.53], [-42.0, -21.75], [-42.25, -21.65], [-42.5, -21.75], [-42.75, -21.65], [-42.82, -21.68], [-42.97, -22.03], [-43.5, -22.25], [-44.03, -22.03], [-44.25, -21.5], [-44.15, -21.25], [-44.18, -21.18], [-44.53, -21.03], [-44.75, -20.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3344640932232323}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6717307049099253}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.248228437339947, 18.094587059043192, 17.890745572506148, 17.293112016915643]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.643034847456022, 16.18120231373655, 15.844529272117995, 15.7993513369683]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4953632999148163, -2.664185665917204, -2.754647581779955, -2.6606287733803087]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.750209133913927, -3.131855870934487, -3.2142927708340494, -3.3344640932232323]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5108325428610674, -1.6622434275429023, -1.7297637288544334, -1.6996100754933565]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6658140938652928, -1.9696027064749233, -2.130852949675816, -2.278107979568548]}}