{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:49.779981", "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-Nov-19_to_2021-Nov-25_47.5_-20.0"}, "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": 2021110002167}, "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 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 25 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 73395.73736403488}, "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": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": -20.0}, "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": 47.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[46.47, -21.03], [46.25, -20.5], [46.35, -20.25], [46.25, -20.0], [46.35, -19.75], [46.25, -19.5], [46.35, -19.25], [46.25, -19.0], [46.35, -18.75], [46.25, -18.5], [46.35, -18.25], [46.25, -18.0], [46.47, -17.47], [46.82, -17.32], [46.85, -17.25], [46.85, -17.24], [46.75, -17.0], [46.97, -16.47], [47.32, -16.32], [47.47, -15.97], [47.82, -15.82], [47.97, -15.47], [48.5, -15.25], [49.03, -15.47], [49.25, -16.0], [49.15, -16.25], [49.25, -16.5], [49.15, -16.75], [49.25, -17.0], [49.15, -17.25], [49.25, -17.5], [49.15, -17.75], [49.25, -18.0], [49.15, -18.25], [49.25, -18.5], [49.15, -18.75], [49.25, -19.0], [49.03, -19.53], [48.5, -19.75], [48.2, -19.62], [48.15, -19.75], [48.25, -20.0], [48.03, -20.53], [47.68, -20.68], [47.53, -21.03], [47.0, -21.25], [46.47, -21.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.47, -19.97], [47.0, -19.75], [47.53, -19.97], [47.75, -20.5], [47.53, -21.03], [47.0, -21.25], [46.47, -21.03], [46.25, -20.5], [46.47, -19.97]]]]}, "2021-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.47, -19.47], [46.82, -19.32], [46.85, -19.25], [46.75, -19.0], [46.97, -18.47], [47.5, -18.25], [48.03, -18.47], [48.25, -19.0], [48.15, -19.25], [48.25, -19.5], [48.15, -19.75], [48.25, -20.0], [48.03, -20.53], [47.68, -20.68], [47.53, -21.03], [47.0, -21.25], [46.47, -21.03], [46.25, -20.5], [46.35, -20.25], [46.25, -20.0], [46.47, -19.47]]], [[[47.5, -17.75], [46.97, -17.53], [46.75, -17.0], [46.97, -16.47], [47.5, -16.25], [48.03, -16.47], [48.25, -17.0], [48.03, -17.53], [47.5, -17.75]]]]}, "2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.25, -20.0], [46.35, -19.75], [46.25, -19.5], [46.35, -19.25], [46.25, -19.0], [46.35, -18.75], [46.25, -18.5], [46.35, -18.25], [46.25, -18.0], [46.47, -17.47], [46.82, -17.32], [46.85, -17.25], 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4.275974090293971}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.238496550419605}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.905548983577432, 21.727601296826435, 23.29296531590319, 23.558669899260394, 23.54010380192318, 24.23710779466859, 22.940706939585027]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.905548983577432, 26.23702506647078, 26.773325848590673, 26.97343615007145, 26.651345231721677, 26.849709257139068, 25.39454388124483]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.7833174064272725, 1.7721099444053152, 2.036747741611063, 2.205929028970738, 2.1930107394205414, 2.838401548424926, 1.8516765342869461]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.7833174064272725, 2.210821943705355, 2.741875812599858, 3.0490815752733056, 3.1332830569432417, 4.275974090293971, 2.713531760936405]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2970284585481722, 1.411263347672337, 1.6571187570786792, 1.847017869107524, 1.8144955296237495, 2.3373147353318733, 1.5301830718856617]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.2970284585481722, 1.778478536131464, 2.2867875307580645, 2.7669743725626397, 2.716502921297917, 3.1849030666140283, 2.263138265706768]}}