{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:47.375936", "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-Mar-09_to_2021-Mar-11_312.0_-28.5"}, "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": 2021030000414}, "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": "March 09 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 11 2021"}, "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": 57220.10219000738}, "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": -28.5}, "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": 312.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 311.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.5}, "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": [[[-49.53, -28.47], [-49.177, -28.323], [-49.043, -28.0], [-49.25, -27.5], [-49.03, -26.97], [-48.5, -26.75], [-48.25, -26.854], [-48.177, -26.823], [-48.03, -26.47], [-47.5, -26.25], [-47.25, -26.354], [-47.0, -26.25], [-46.75, -26.354], [-46.5, -26.25], [-45.97, -26.47], [-45.75, -27.0], [-45.854, -27.25], [-45.75, -27.5], [-45.97, -28.03], [-46.323, -28.177], [-46.354, -28.25], [-46.25, -28.5], [-46.47, -29.03], [-46.823, -29.177], [-46.97, -29.53], [-47.5, -29.75], [-47.75, -29.646], [-47.823, -29.677], [-47.97, -30.03], [-48.5, -30.25], [-48.75, -30.146], [-49.0, -30.25], [-49.53, -30.03], [-49.75, -29.5], [-49.646, -29.25], [-49.75, -29.0], [-49.53, -28.47]]]}}, "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": {"2021-03-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-49.64644660940672, -29.25], [-49.75, -29.0], [-49.53033008588989, -28.46966991411009], [-49.17677669529661, -28.32322330470336], [-49.04289321881345, -28.0], [-49.25, -27.5], [-49.03033008588989, -26.96966991411009], [-48.5, -26.75], [-48.25, -26.853553390593277], [-48.17677669529661, -26.82322330470336], [-48.03033008588989, -26.46966991411009], [-47.5, -26.25], [-47.25, -26.353553390593277], [-47.0, -26.25], [-46.75, -26.353553390593277], [-46.5, -26.25], [-45.96966991411011, -26.46966991411009], [-45.75, -27.0], [-45.85355339059328, -27.25], [-45.75, -27.5], [-45.96966991411011, -28.03033008588991], [-46.32322330470339, -28.17677669529664], [-46.35355339059328, -28.25], [-46.25, -28.5], [-46.46966991411011, -29.03033008588991], [-46.82322330470339, -29.17677669529664], [-46.96966991411011, -29.53033008588991], [-47.5, -29.75], [-47.75, -29.646446609406723], [-47.82322330470339, -29.67677669529664], [-47.96966991411011, -30.03033008588991], [-48.5, -30.25], [-48.75, -30.146446609406723], [-49.0, -30.25], [-49.53033008588989, -30.03033008588991], [-49.75, -29.5], [-49.64644660940672, -29.25]]]}, "2021-03-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-49.64644660940672, -29.25], [-49.75, -29.0], [-49.53033008588989, -28.46966991411009], [-49.17677669529661, -28.32322330470336], [-49.04289321881345, -28.0], [-49.25, -27.5], [-49.03033008588989, -26.96966991411009], [-48.5, -26.75], [-48.25, -26.853553390593277], [-48.17677669529661, -26.82322330470336], [-48.03033008588989, -26.46966991411009], [-47.5, -26.25], [-47.25, -26.353553390593277], [-47.0, -26.25], [-46.75, -26.353553390593277], [-46.5, -26.25], [-45.96966991411011, -26.46966991411009], [-45.75, -27.0], [-45.85355339059328, -27.25], [-45.75, -27.5], [-45.96966991411011, -28.03033008588991], [-46.32322330470339, -28.17677669529664], [-46.35355339059328, -28.25], [-46.25, -28.5], [-46.46966991411011, -29.03033008588991], [-46.82322330470339, -29.17677669529664], [-46.96966991411011, -29.53033008588991], [-47.5, -29.75], [-47.75, -29.646446609406723], [-47.82322330470339, -29.67677669529664], [-47.96966991411011, -30.03033008588991], [-48.5, -30.25], [-48.75, -30.146446609406723], [-49.0, -30.25], [-49.53033008588989, -30.03033008588991], [-49.75, -29.5], [-49.64644660940672, -29.25]]]}, "2021-03-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-49.64644660940672, -29.25], [-49.75, -29.0], [-49.53033008588989, -28.46966991411009], [-49.17677669529661, -28.32322330470336], [-49.04289321881345, -28.0], [-49.25, -27.5], [-49.03033008588989, -26.96966991411009], [-48.5, -26.75], [-48.25, -26.853553390593277], [-48.17677669529661, -26.82322330470336], [-48.03033008588989, -26.46966991411009], [-47.5, -26.25], [-47.25, -26.353553390593277], [-47.0, -26.25], [-46.75, -26.353553390593277], [-46.5, -26.25], [-45.96966991411011, -26.46966991411009], [-45.75, -27.0], [-45.85355339059328, -27.25], [-45.75, -27.5], [-45.96966991411011, -28.03033008588991], [-46.32322330470339, -28.17677669529664], [-46.35355339059328, -28.25], [-46.25, -28.5], [-46.46966991411011, -29.03033008588991], [-46.82322330470339, -29.17677669529664], [-46.96966991411011, -29.53033008588991], [-47.5, -29.75], [-47.75, -29.646446609406723], [-47.82322330470339, -29.67677669529664], [-47.96966991411011, -30.03033008588991], [-48.5, -30.25], [-48.75, -30.146446609406723], [-49.0, -30.25], [-49.53033008588989, -30.03033008588991], [-49.75, -29.5], [-49.64644660940672, -29.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.60823542454159}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0004388618628592}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.757690779699374, 22.486760499700267, 23.433083888158478]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.01441879589521, 21.443164471280113, 22.630758984028944]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1757219079265617, -2.407638656289632, -1.417956021372385]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5233056319374327, -2.60823542454159, -1.8944802451869691]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.259870162195899, -2.561208974945014, -1.4999206714481996]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6315829781341376, -2.900139322665673, -1.7489461566722637]}}