{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:11:41.657551", "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-Feb-22_to_2020-Feb-24_272.0_48.5"}, "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": 2020020002362}, "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": "February 22 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 24 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": "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": 83369.16326089248}, "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": ["Canada", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 48.5}, "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": 272.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 275.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-90.5, 48.25], [-90.25, 48.146], [-90.177, 48.177], [-90.03, 48.53], [-89.677, 48.677], [-89.53, 49.03], [-89.0, 49.25], [-88.75, 49.146], [-88.5, 49.25], [-88.25, 49.146], [-88.0, 49.25], [-87.75, 49.146], [-87.5, 49.25], [-87.25, 49.146], [-87.0, 49.25], [-86.75, 49.146], [-86.5, 49.25], [-85.97, 49.03], [-85.823, 48.677], [-85.75, 48.646], [-85.5, 48.75], [-84.97, 48.53], [-84.823, 48.177], [-84.75, 48.146], [-84.5, 48.25], [-83.97, 48.03], [-83.75, 47.5], [-83.97, 46.97], [-84.323, 46.823], [-84.47, 46.47], [-85.0, 46.25], [-85.25, 46.354], [-85.5, 46.25], [-85.75, 46.354], [-86.0, 46.25], [-86.25, 46.354], [-86.323, 46.323], [-86.47, 45.97], [-87.0, 45.75], [-87.53, 45.97], [-87.677, 46.323], [-87.75, 46.354], [-88.0, 46.25], [-88.53, 46.47], [-88.677, 46.823], [-88.75, 46.854], [-88.823, 46.823], [-88.97, 46.47], [-89.5, 46.25], [-89.75, 46.354], [-90.0, 46.25], [-90.25, 46.354], [-90.5, 46.25], [-90.75, 46.354], [-91.0, 46.25], [-91.53, 46.47], [-91.75, 47.0], [-91.53, 47.53], [-91.177, 47.677], [-91.03, 48.03], [-90.5, 48.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-02-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-91.17677669529661, 47.67677669529664], [-91.03033008588989, 48.03033008588991], [-90.5, 48.25], [-90.25, 48.14644660940672], [-90.17677669529661, 48.17677669529664], [-90.03033008588989, 48.53033008588991], [-89.67677669529661, 48.67677669529664], [-89.53033008588989, 49.03033008588991], [-89.0, 49.25], [-88.75, 49.14644660940672], [-88.5, 49.25], [-88.25, 49.14644660940672], [-88.0, 49.25], [-87.75, 49.14644660940672], [-87.5, 49.25], [-87.25, 49.14644660940672], [-87.0, 49.25], [-86.75, 49.14644660940672], [-86.5, 49.25], [-85.96966991411011, 49.03033008588991], [-85.82322330470339, 48.67677669529664], [-85.75, 48.64644660940672], [-85.5, 48.75], [-84.96966991411011, 48.53033008588991], 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recorded over entire duration", "value": 11.62690395477938}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 9.582079450921547}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.36506335292011727, 0.9327389645482072, 1.2644091567183295]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.0746306561420056, 1.9196779853022576, 1.7425323368452723]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [8.974242510757403, 9.66601829845305, 10.105977543554179]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [10.60268686282069, 10.922534614299309, 11.62690395477938]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5061533598180357, 1.6312580521163966, 1.691620047846947]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7286472723536794, 1.8035211939689675, 1.9023643703380857]}}