{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:47.482279", "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": "2020-Dec-05_to_2020-Dec-07_309.5_-27.0"}, "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": 2020120000273}, "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": "December 05 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 07 2020"}, "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": 57010.87611032966}, "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": -27.0}, "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": 309.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 307.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -27.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-53.03, -30.53], [-53.25, -30.0], [-53.03, -29.47], [-52.5, -29.25], [-52.25, -29.354], [-52.177, -29.323], [-52.03, -28.97], [-51.5, -28.75], [-51.25, -28.854], [-51.0, -28.75], [-50.75, -28.854], [-50.677, -28.823], [-50.543, -28.5], [-50.677, -28.177], [-51.03, -28.03], [-51.25, -27.5], [-51.146, -27.25], [-51.25, -27.0], [-51.03, -26.47], [-50.5, -26.25], [-49.97, -26.47], [-49.823, -26.823], [-49.75, -26.854], [-49.677, -26.823], [-49.53, -26.47], [-49.0, -26.25], [-48.47, -26.47], [-48.323, -26.823], [-47.97, -26.97], [-47.75, -27.5], [-47.97, -28.03], [-48.323, -28.177], [-48.354, -28.25], [-48.25, -28.5], [-48.47, -29.03], [-49.0, -29.25], [-49.25, -29.146], [-49.323, -29.177], [-49.354, -29.25], [-49.25, -29.5], [-49.47, -30.03], [-49.823, -30.177], [-49.97, -30.53], [-50.5, -30.75], [-50.75, -30.646], [-51.0, -30.75], [-51.5, -30.543], [-52.0, -30.75], [-52.25, -30.646], [-52.5, -30.75], [-53.03, -30.53]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-52.25, -30.646446609406723], [-52.5, -30.75], [-53.03033008588989, -30.53033008588991], [-53.25, -30.0], [-53.03033008588989, -29.46966991411009], [-52.5, -29.25], [-52.25, -29.353553390593277], [-52.17677669529661, -29.32322330470336], [-52.03033008588989, -28.96966991411009], [-51.5, -28.75], [-51.25, -28.853553390593277], [-51.0, -28.75], [-50.75, -28.853553390593277], [-50.67677669529661, -28.82322330470336], [-50.54289321881345, -28.5], [-50.67677669529661, -28.17677669529664], [-51.03033008588989, -28.03033008588991], [-51.25, -27.5], [-51.14644660940672, -27.25], [-51.25, -27.0], [-51.03033008588989, -26.46966991411009], [-50.5, -26.25], [-49.96966991411011, -26.46966991411009], [-49.82322330470339, -26.82322330470336], [-49.75, -26.853553390593277], [-49.67677669529661, -26.82322330470336], [-49.53033008588989, -26.46966991411009], [-49.0, 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-30.75], [-51.5, -30.542893218813443], [-52.0, -30.75], [-52.25, -30.646446609406723]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.566049480282231}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7379210227868995}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.03799032958085, 16.07856745209449, 18.01833099966666]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.929304653213137, 12.496081243474691, 14.658608042914864]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6620821651534277, -4.702298788019047, -2.8493821151882237]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.817774349048989, -5.566049480282231, -3.3255514321720625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7545706502935388, -2.3076792802832635, -1.3864776182489875]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.474149489389354, -2.725935645888056, -1.5863202508038732]}}