{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:24:34.390447", "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-May-21_to_2021-May-24_270.5_19.5"}, "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": 2021050000928}, "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": "May 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 24 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": 52426.89445301065}, "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": ["Mexico"]}, "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": 19.5}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-91.03, 20.03], [-90.677, 20.177], [-90.646, 20.25], [-90.75, 20.5], [-90.53, 21.03], [-90.0, 21.25], [-89.75, 21.146], [-89.5, 21.25], [-89.25, 21.146], [-89.0, 21.25], [-88.47, 21.03], [-88.323, 20.677], [-87.97, 20.53], [-87.75, 20.0], [-87.854, 19.75], [-87.75, 19.5], [-87.854, 19.25], [-87.75, 19.0], [-87.97, 18.47], [-88.323, 18.323], [-88.47, 17.97], [-89.0, 17.75], [-89.25, 17.854], [-89.5, 17.75], [-90.03, 17.97], [-90.177, 18.323], [-90.53, 18.47], [-90.677, 18.823], [-91.03, 18.97], [-91.25, 19.5], [-91.03, 20.03]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-90.67677669529661, 18.82322330470336], [-91.03033008588989, 18.96966991411009], [-91.25, 19.5], [-91.03033008588989, 20.03033008588991], [-90.67677669529661, 20.17677669529664], [-90.64644660940672, 20.25], [-90.75, 20.5], [-90.53033008588989, 21.03033008588991], [-90.0, 21.25], [-89.75, 21.146446609406723], [-89.5, 21.25], [-89.25, 21.146446609406723], [-89.0, 21.25], [-88.46966991411011, 21.03033008588991], [-88.32322330470339, 20.67677669529664], [-87.96966991411011, 20.53033008588991], [-87.75, 20.0], [-87.85355339059328, 19.75], [-87.75, 19.5], [-87.85355339059328, 19.25], [-87.75, 19.0], [-87.96966991411011, 18.46966991411009], [-88.32322330470339, 18.32322330470336], [-88.46966991411011, 17.96966991411009], [-89.0, 17.75], [-89.25, 17.853553390593277], [-89.5, 17.75], [-90.03033008588989, 17.96966991411009], [-90.17677669529661, 18.32322330470336], [-90.53033008588989, 18.46966991411009], [-90.67677669529661, 18.82322330470336]]]}, "2021-05-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-90.67677669529661, 18.82322330470336], [-91.03033008588989, 18.96966991411009], [-91.25, 19.5], [-91.03033008588989, 20.03033008588991], [-90.67677669529661, 20.17677669529664], [-90.64644660940672, 20.25], [-90.75, 20.5], [-90.53033008588989, 21.03033008588991], [-90.0, 21.25], [-89.75, 21.146446609406723], [-89.5, 21.25], [-89.25, 21.146446609406723], [-89.0, 21.25], [-88.46966991411011, 21.03033008588991], [-88.32322330470339, 20.67677669529664], [-87.96966991411011, 20.53033008588991], [-87.75, 20.0], [-87.85355339059328, 19.75], [-87.75, 19.5], [-87.85355339059328, 19.25], [-87.75, 19.0], [-87.96966991411011, 18.46966991411009], [-88.32322330470339, 18.32322330470336], [-88.46966991411011, 17.96966991411009], [-89.0, 17.75], [-89.25, 17.853553390593277], [-89.5, 17.75], [-90.03033008588989, 17.96966991411009], [-90.17677669529661, 18.32322330470336], [-90.53033008588989, 18.46966991411009], [-90.67677669529661, 18.82322330470336]]]}, "2021-05-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-90.67677669529661, 18.82322330470336], [-91.03033008588989, 18.96966991411009], [-91.25, 19.5], [-91.03033008588989, 20.03033008588991], [-90.67677669529661, 20.17677669529664], 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t2m.", "value": [25.57367383934121, 25.012761287483386, 25.548878134259155, 26.715560193123224]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5641587104163994, -3.1484455657969477, -2.8278988117604595, -2.5834161547299317]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6149314968079693, -3.978286162591587, -3.519163519019685, -2.9782974163019276]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6227623927232437, -2.0737708989369654, -1.893295914900043, -1.510653872564982]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9659206195223753, 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