{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:15.922214", "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-Nov-18_to_2020-Nov-21_311.0_-23.5"}, "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": 2020110000575}, "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": "November 18 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 21 2020"}, "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": 58675.725767132084}, "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": -23.5}, "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": 311.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "311.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 310.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 312.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-50.177, -27.677], [-50.53, -27.53], [-50.75, -27.0], [-50.646, -26.75], [-50.75, -26.5], [-50.53, -25.97], [-50.177, -25.823], [-50.03, -25.47], [-49.677, -25.323], [-49.543, -25.0], [-49.75, -24.5], [-49.543, -24.0], [-49.677, -23.677], [-50.03, -23.53], [-50.25, -23.0], [-50.03, -22.47], [-49.5, -22.25], [-48.97, -22.47], [-48.823, -22.823], [-48.75, -22.854], [-48.5, -22.75], [-48.25, -22.854], [-48.0, -22.75], [-47.47, -22.97], [-47.25, -23.5], [-47.354, -23.75], [-47.25, -24.0], [-47.354, -24.25], [-47.25, -24.5], [-47.354, -24.75], [-47.25, -25.0], [-47.47, -25.53], [-48.0, -25.75], [-48.25, -25.646], [-48.323, -25.677], [-48.354, -25.75], [-48.25, -26.0], [-48.354, -26.25], [-48.25, -26.5], [-48.457, -27.0], [-48.25, -27.5], [-48.47, -28.03], [-49.0, -28.25], [-49.25, -28.146], [-49.5, -28.25], [-50.03, -28.03], [-50.177, -27.677]]]}}, "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": {"2020-11-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-50.64644660940672, -26.75], [-50.75, -26.5], [-50.53033008588989, -25.96966991411009], [-50.17677669529661, -25.82322330470336], [-50.03033008588989, -25.46966991411009], [-49.67677669529661, -25.32322330470336], [-49.54289321881345, -25.0], [-49.75, -24.5], [-49.54289321881345, -24.0], [-49.67677669529661, -23.67677669529664], [-50.03033008588989, -23.53033008588991], [-50.25, -23.0], [-50.03033008588989, -22.46966991411009], [-49.5, -22.25], [-48.96966991411011, -22.46966991411009], [-48.82322330470339, -22.82322330470336], [-48.75, -22.853553390593277], [-48.5, -22.75], [-48.25, -22.853553390593277], [-48.0, -22.75], [-47.46966991411011, -22.96966991411009], [-47.25, -23.5], [-47.35355339059328, -23.75], [-47.25, -24.0], [-47.35355339059328, -24.25], [-47.25, -24.5], [-47.35355339059328, -24.75], [-47.25, -25.0], [-47.46966991411011, -25.53033008588991], [-48.0, -25.75], [-48.25, -25.646446609406723], [-48.32322330470339, -25.67677669529664], [-48.35355339059328, -25.75], [-48.25, -26.0], [-48.35355339059328, -26.25], [-48.25, -26.5], [-48.46966991411011, -27.03033008588991], [-48.82322330470339, -27.17677669529664], [-48.96966991411011, -27.53033008588991], [-49.5, -27.75], [-49.75, -27.646446609406723], [-50.0, -27.75], [-50.53033008588989, -27.53033008588991], [-50.75, -27.0], [-50.64644660940672, -26.75]]]}, "2020-11-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-50.64644660940672, -26.75], [-50.75, -26.5], [-50.53033008588989, -25.96966991411009], [-50.17677669529661, -25.82322330470336], [-50.03033008588989, -25.46966991411009], [-49.67677669529661, -25.32322330470336], [-49.54289321881345, -25.0], [-49.75, -24.5], [-49.54289321881345, -24.0], [-49.67677669529661, -23.67677669529664], [-50.03033008588989, -23.53033008588991], [-50.25, -23.0], [-50.03033008588989, -22.46966991411009], [-49.5, -22.25], [-48.96966991411011, -22.46966991411009], [-48.82322330470339, -22.82322330470336], [-48.75, -22.853553390593277], [-48.5, -22.75], [-48.25, -22.853553390593277], [-48.0, -22.75], [-47.46966991411011, -22.96966991411009], [-47.25, -23.5], [-47.35355339059328, -23.75], [-47.25, -24.0], [-47.35355339059328, -24.25], [-47.25, -24.5], [-47.35355339059328, -24.75], [-47.25, -25.0], [-47.46966991411011, -25.53033008588991], [-48.0, -25.75], [-48.25, -25.646446609406723], [-48.32322330470339, -25.67677669529664], [-48.35355339059328, -25.75], [-48.25, -26.0], [-48.35355339059328, -26.25], [-48.25, -26.5], [-48.45710678118655, -27.0], [-48.25, -27.5], [-48.46966991411011, -28.03033008588991], [-49.0, -28.25], [-49.25, -28.146446609406723], [-49.5, -28.25], [-50.03033008588989, -28.03033008588991], [-50.17677669529661, -27.67677669529664], [-50.53033008588989, -27.53033008588991], [-50.75, -27.0], [-50.64644660940672, -26.75]]]}, "2020-11-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-50.64644660940672, -26.75], [-50.75, -26.5], [-50.53033008588989, -25.96966991411009], [-50.17677669529661, -25.82322330470336], [-50.03033008588989, -25.46966991411009], [-49.67677669529661, -25.32322330470336], [-49.54289321881345, -25.0], [-49.75, -24.5], [-49.54289321881345, -24.0], [-49.67677669529661, -23.67677669529664], [-50.03033008588989, -23.53033008588991], [-50.25, -23.0], [-50.03033008588989, -22.46966991411009], [-49.5, -22.25], [-48.96966991411011, -22.46966991411009], [-48.82322330470339, -22.82322330470336], [-48.75, -22.853553390593277], [-48.5, -22.75], [-48.25, -22.853553390593277], [-48.0, -22.75], [-47.46966991411011, -22.96966991411009], [-47.25, -23.5], [-47.35355339059328, -23.75], [-47.25, -24.0], [-47.35355339059328, -24.25], [-47.25, -24.5], [-47.35355339059328, -24.75], [-47.25, -25.0], [-47.46966991411011, -25.53033008588991], [-48.0, -25.75], [-48.25, -25.646446609406723], [-48.32322330470339, -25.67677669529664], [-48.35355339059328, -25.75], [-48.25, -26.0], [-48.35355339059328, -26.25], [-48.25, -26.5], [-48.45710678118655, -27.0], [-48.25, -27.5], [-48.46966991411011, -28.03033008588991], [-49.0, -28.25], [-49.25, -28.146446609406723], [-49.5, -28.25], [-50.03033008588989, -28.03033008588991], [-50.17677669529661, -27.67677669529664], [-50.53033008588989, -27.53033008588991], [-50.75, -27.0], [-50.64644660940672, -26.75]]]}, "2020-11-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-49.25, -28.146446609406723], [-49.5, -28.25], [-50.03033008588989, -28.03033008588991], [-50.25, -27.5], [-50.03033008588989, -26.96966991411009], [-49.5, -26.75], [-49.25, -26.853553390593277], [-49.0, -26.75], [-48.46966991411011, -26.96966991411009], [-48.25, -27.5], [-48.46966991411011, -28.03033008588991], [-49.0, -28.25], [-49.25, -28.146446609406723]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.30597967371898}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.484581667645186}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.791733048107346, 16.733076134465705, 17.172001698700228, 16.161240876507918]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.99888387822699, 14.341131796681793, 14.573836113109849, 16.00174539195723]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6929343450699075, -3.590638052889333, -3.2304469560279823, -3.0600536590274316]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.30597967371898, -4.15220051691756, -3.846483353806377, -3.088867077055852]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5782988731196732, -1.6355389990910105, -1.4784339573152572, -1.4273538248720479]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8333789309946702, -1.9931456048498823, -1.6854795206898163, -1.4365310693536943]}}