{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:50.150234", "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-Jul-31_to_2021-Aug-04_262.5_25.0"}, "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": 2021070003317}, "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": "July 31 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 04 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 100674.31169058493}, "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": ["United States"]}, "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": 25.0}, "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": 262.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "262.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-98.25, 25.0], [-98.03, 25.53], [-97.677, 25.677], [-97.646, 25.75], [-97.75, 26.0], [-97.646, 26.25], [-97.75, 26.5], [-97.646, 26.75], [-97.75, 27.0], [-97.646, 27.25], [-97.75, 27.5], [-97.646, 27.75], [-97.75, 28.0], [-97.53, 28.53], [-97.177, 28.677], [-97.03, 29.03], [-96.5, 29.25], [-95.97, 29.03], [-95.75, 28.5], [-95.97, 27.97], [-96.323, 27.823], [-96.354, 27.75], [-96.25, 27.5], [-96.354, 27.25], [-96.323, 27.177], [-95.97, 27.03], [-95.823, 26.677], [-95.75, 26.646], [-95.5, 26.75], [-95.25, 26.646], [-95.0, 26.75], [-94.75, 26.646], [-94.5, 26.75], [-93.97, 26.53], [-93.75, 26.0], [-93.854, 25.75], [-93.75, 25.5], [-93.854, 25.25], [-93.75, 25.0], [-93.97, 24.47], [-94.323, 24.323], [-94.47, 23.97], [-95.0, 23.75], [-95.53, 23.97], [-95.677, 24.323], [-95.75, 24.354], [-96.0, 24.25], [-96.302, 24.375], [-96.354, 24.25], [-96.323, 24.177], [-95.97, 24.03], [-95.75, 23.5], [-95.854, 23.25], [-95.75, 23.0], [-95.97, 22.47], [-96.5, 22.25], [-96.75, 22.354], [-96.823, 22.323], [-96.97, 21.97], [-97.5, 21.75], [-98.03, 21.97], [-98.25, 22.5], [-98.146, 22.75], [-98.25, 23.0], [-98.146, 23.25], [-98.25, 23.5], [-98.146, 23.75], [-98.25, 24.0], [-98.146, 24.25], [-98.25, 24.5], [-98.146, 24.75], [-98.25, 25.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-98.14644660940672, 24.75], [-98.25, 25.0], [-98.03033008588989, 25.53033008588991], [-97.67677669529661, 25.67677669529664], [-97.64644660940672, 25.75], [-97.75, 26.0], [-97.64644660940672, 26.25], [-97.75, 26.5], [-97.64644660940672, 26.75], [-97.75, 27.0], [-97.64644660940672, 27.25], [-97.75, 27.5], [-97.64644660940672, 27.75], [-97.75, 28.0], [-97.53033008588989, 28.53033008588991], [-97.17677669529661, 28.67677669529664], [-97.03033008588989, 29.03033008588991], [-96.5, 29.25], [-95.96966991411011, 29.03033008588991], [-95.75, 28.5], [-95.96966991411011, 27.96966991411009], [-96.32322330470339, 27.82322330470336], [-96.35355339059328, 27.75], [-96.25, 27.5], [-96.35355339059328, 27.25], [-96.32322330470339, 27.17677669529664], [-95.96966991411011, 27.03033008588991], [-95.82322330470339, 26.67677669529664], [-95.75, 26.646446609406723], [-95.5, 26.75], [-95.25, 26.646446609406723], [-95.0, 26.75], [-94.75, 26.646446609406723], [-94.5, 26.75], [-93.96966991411011, 26.53033008588991], [-93.75, 26.0], [-93.85355339059328, 25.75], [-93.75, 25.5], [-93.85355339059328, 25.25], [-93.75, 25.0], [-93.96966991411011, 24.46966991411009], [-94.32322330470339, 24.32322330470336], [-94.46966991411011, 23.96966991411009], [-95.0, 23.75], [-95.53033008588989, 23.96966991411009], [-95.67677669529661, 24.32322330470336], [-95.75, 24.353553390593277], [-96.0, 24.25], [-96.53033008588989, 24.46966991411009], [-96.67677669529661, 24.82322330470336], [-96.75, 24.853553390593277], [-96.82322330470339, 24.82322330470336], [-96.85355339059328, 24.75], [-96.75, 24.5], [-96.96966991411011, 23.96966991411009], [-97.5, 23.75], [-98.03033008588989, 23.96966991411009], [-98.25, 24.5], [-98.14644660940672, 24.75]]]}, "2021-08-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-98.14644660940672, 22.75], [-98.25, 23.0], [-98.14644660940672, 23.25], [-98.25, 23.5], [-98.14644660940672, 23.75], [-98.25, 24.0], [-98.14644660940672, 24.25], [-98.25, 24.5], [-98.14644660940672, 24.75], [-98.25, 25.0], [-98.03033008588989, 25.53033008588991], [-97.67677669529661, 25.67677669529664], [-97.64644660940672, 25.75], [-97.75, 26.0], [-97.64644660940672, 26.25], [-97.75, 26.5], [-97.64644660940672, 26.75], [-97.75, 27.0], [-97.64644660940672, 27.25], [-97.75, 27.5], [-97.64644660940672, 27.75], [-97.75, 28.0], [-97.53033008588989, 28.53033008588991], [-97.17677669529661, 28.67677669529664], [-97.03033008588989, 29.03033008588991], [-96.5, 29.25], [-95.96966991411011, 29.03033008588991], [-95.75, 28.5], [-95.96966991411011, 27.96966991411009], [-96.32322330470339, 27.82322330470336], [-96.35355339059328, 27.75], [-96.25, 27.5], [-96.35355339059328, 27.25], [-96.32322330470339, 27.17677669529664], [-95.96966991411011, 27.03033008588991], [-95.82322330470339, 26.67677669529664], [-95.75, 26.646446609406723], [-95.5, 26.75], [-95.25, 26.646446609406723], [-95.0, 26.75], [-94.75, 26.646446609406723], [-94.5, 26.75], [-93.96966991411011, 26.53033008588991], [-93.75, 26.0], [-93.85355339059328, 25.75], [-93.75, 25.5], [-93.85355339059328, 25.25], [-93.75, 25.0], [-93.96966991411011, 24.46966991411009], [-94.32322330470339, 24.32322330470336], [-94.46966991411011, 23.96966991411009], [-95.0, 23.75], [-95.53033008588989, 23.96966991411009], [-95.67677669529661, 24.32322330470336], [-95.75, 24.353553390593277], [-96.0, 24.25], [-96.30177669529667, 24.375000000000007], [-96.35355339059328, 24.25], [-96.32322330470339, 24.17677669529664], [-95.96966991411011, 24.03033008588991], [-95.75, 23.5], [-95.85355339059328, 23.25], [-95.75, 23.0], [-95.96966991411011, 22.46966991411009], [-96.5, 22.25], [-96.75, 22.353553390593277], [-96.82322330470339, 22.32322330470336], [-96.96966991411011, 21.96966991411009], [-97.5, 21.75], [-98.03033008588989, 21.96966991411009], [-98.25, 22.5], [-98.14644660940672, 22.75]]]}, "2021-08-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-98.14644660940672, 22.75], [-98.25, 23.0], [-98.14644660940672, 23.25], [-98.25, 23.5], [-98.14644660940672, 23.75], [-98.25, 24.0], [-98.14644660940672, 24.25], [-98.25, 24.5], [-98.14644660940672, 24.75], [-98.25, 25.0], [-98.03033008588989, 25.53033008588991], [-97.67677669529661, 25.67677669529664], [-97.64644660940672, 25.75], [-97.75, 26.0], [-97.64644660940672, 26.25], [-97.75, 26.5], [-97.64644660940672, 26.75], [-97.75, 27.0], [-97.64644660940672, 27.25], [-97.75, 27.5], [-97.64644660940672, 27.75], [-97.75, 28.0], [-97.53033008588989, 28.53033008588991], [-97.17677669529661, 28.67677669529664], [-97.03033008588989, 29.03033008588991], [-96.5, 29.25], [-95.96966991411011, 29.03033008588991], [-95.75, 28.5], [-95.96966991411011, 27.96966991411009], [-96.32322330470339, 27.82322330470336], [-96.35355339059328, 27.75], [-96.25, 27.5], [-96.35355339059328, 27.25], [-96.32322330470339, 27.17677669529664], [-95.96966991411011, 27.03033008588991], [-95.82322330470339, 26.67677669529664], [-95.75, 26.646446609406723], [-95.5, 26.75], [-95.25, 26.646446609406723], [-95.0, 26.75], [-94.75, 26.646446609406723], [-94.5, 26.75], [-93.96966991411011, 26.53033008588991], [-93.75, 26.0], [-93.85355339059328, 25.75], [-93.75, 25.5], [-93.85355339059328, 25.25], [-93.75, 25.0], [-93.96966991411011, 24.46966991411009], [-94.32322330470339, 24.32322330470336], [-94.46966991411011, 23.96966991411009], [-95.0, 23.75], [-95.53033008588989, 23.96966991411009], [-95.67677669529661, 24.32322330470336], [-95.75, 24.353553390593277], [-96.0, 24.25], [-96.30177669529667, 24.375000000000007], [-96.35355339059328, 24.25], [-96.32322330470339, 24.17677669529664], [-95.96966991411011, 24.03033008588991], [-95.75, 23.5], [-95.85355339059328, 23.25], [-95.75, 23.0], [-95.96966991411011, 22.46966991411009], [-96.5, 22.25], [-96.75, 22.353553390593277], [-96.82322330470339, 22.32322330470336], [-96.96966991411011, 21.96966991411009], [-97.5, 21.75], [-98.03033008588989, 21.96966991411009], [-98.25, 22.5], [-98.14644660940672, 22.75]]]}, "2021-08-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-98.14644660940672, 22.75], [-98.25, 23.0], [-98.14644660940672, 23.25], [-98.25, 23.5], [-98.14644660940672, 23.75], [-98.25, 24.0], [-98.14644660940672, 24.25], [-98.25, 24.5], [-98.14644660940672, 24.75], [-98.25, 25.0], [-98.03033008588989, 25.53033008588991], [-97.67677669529661, 25.67677669529664], [-97.64644660940672, 25.75], [-97.75, 26.0], [-97.64644660940672, 26.25], [-97.75, 26.5], [-97.53033008588989, 27.03033008588991], [-97.0, 27.25], [-96.46966991411011, 27.03033008588991], [-96.32322330470339, 26.67677669529664], [-95.96966991411011, 26.53033008588991], [-95.75, 26.0], [-95.96966991411011, 25.46966991411009], [-96.32322330470339, 25.32322330470336], [-96.35355339059328, 25.25], [-96.25, 25.0], [-96.35355339059328, 24.75], [-96.25, 24.5], [-96.35355339059328, 24.25], [-96.32322330470339, 24.17677669529664], [-95.96966991411011, 24.03033008588991], [-95.75, 23.5], [-95.85355339059328, 23.25], [-95.75, 23.0], [-95.96966991411011, 22.46966991411009], [-96.5, 22.25], [-96.75, 22.353553390593277], [-96.82322330470339, 22.32322330470336], [-96.96966991411011, 21.96966991411009], [-97.5, 21.75], [-98.03033008588989, 21.96966991411009], [-98.25, 22.5], [-98.14644660940672, 22.75]]]}, "2021-08-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-98.14644660940672, 24.25], [-98.25, 24.5], [-98.14644660940672, 24.75], [-98.25, 25.0], [-98.03033008588989, 25.53033008588991], [-97.5, 25.75], [-96.96966991411011, 25.53033008588991], [-96.75, 25.0], [-96.85355339059328, 24.75], [-96.75, 24.5], [-96.85355339059328, 24.25], [-96.75, 24.0], [-96.96966991411011, 23.46966991411009], [-97.5, 23.25], [-98.03033008588989, 23.46966991411009], [-98.25, 24.0], [-98.14644660940672, 24.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.5236154915966722}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 0.8880988656397777}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.973280368257974, 29.06653604453203, 29.16300566201886, 28.890620859702892, 28.591348011174716]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.355143086989983, 30.071199187922787, 29.611355714901435, 29.068391614101927, 28.64422841056006]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.7425830758166945, 0.8911544168013611, 0.9917868438259695, 0.8941498497649851, 0.7855191852826616]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [0.8389107425700217, 1.5236154915966722, 1.2712276551933428, 1.17947811749616, 0.8032256732298038]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3464813674031335, 1.5501044388242986, 1.6438621429925684, 1.4472003021814472, 1.2593846204298504]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.673934660306752, 2.2351558235075877, 2.0126499929962502, 1.813588491992952, 1.2936217734947673]}}