{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:32.901455", "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": "2026-Apr-18_to_2026-Apr-25_34.0_11.5"}, "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": 2026040002148}, "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": "April 18 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 51390.83843993582}, "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": ["Ethiopia", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "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": 11.5}, "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": 34.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 32.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.0, 13.25], [33.53, 13.03], [33.75, 12.5], [33.53, 11.97], [33.18, 11.82], [33.03, 11.47], [32.5, 11.25], [31.97, 11.47], [31.75, 12.0], [31.97, 12.53], [32.32, 12.68], [32.47, 13.03], [33.0, 13.25]]]]}, "2026-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.5, 13.25], [36.03, 13.03], [36.25, 12.5], [36.15, 12.25], [36.25, 12.0], [36.03, 11.47], [35.5, 11.25], [34.97, 11.47], [34.75, 12.0], [34.85, 12.25], [34.75, 12.5], [34.97, 13.03], [35.5, 13.25]]], [[[32.47, 13.53], [33.0, 13.75], [33.53, 13.53], [33.75, 13.0], [33.65, 12.75], [33.75, 12.5], [33.53, 11.97], [33.18, 11.82], [33.03, 11.47], [32.5, 11.25], [31.97, 11.47], [31.75, 12.0], [31.97, 12.53], [32.32, 12.68], [32.35, 12.75], [32.25, 13.0], [32.47, 13.53]]]]}, "2026-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.25, 13.0], [32.47, 13.53], [33.0, 13.75], [33.53, 13.53], [33.68, 13.18], [33.75, 13.15], [34.0, 13.25], [34.25, 13.15], [34.32, 13.18], [34.47, 13.53], [35.0, 13.75], [35.53, 13.53], [35.68, 13.18], [36.03, 13.03], [36.25, 12.5], [36.15, 12.25], [36.25, 12.0], [36.03, 11.47], [35.5, 11.25], [35.0, 11.46], [34.5, 11.25], [33.97, 11.47], [33.82, 11.82], [33.75, 11.85], [33.5, 11.75], [33.25, 11.85], [33.18, 11.82], [33.03, 11.47], [32.5, 11.25], [31.97, 11.47], [31.75, 12.0], [31.97, 12.53], [32.32, 12.68], [32.35, 12.75], [32.25, 13.0]]]]}, "2026-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 13.53], [33.0, 13.75], [33.53, 13.53], [33.68, 13.18], [33.75, 13.15], [34.0, 13.25], [34.25, 13.15], [34.32, 13.18], [34.47, 13.53], [35.0, 13.75], [35.53, 13.53], [35.68, 13.18], [36.03, 13.03], [36.25, 12.5], [36.15, 12.25], [36.25, 12.0], [36.03, 11.47], [35.68, 11.32], [35.53, 10.97], [35.13, 10.8], [35.25, 10.5], [35.03, 9.97], [34.5, 9.75], [33.97, 9.97], [33.75, 10.5], [33.88, 10.8], [33.47, 10.97], [33.25, 11.5], [33.38, 11.8], [33.25, 11.85], [33.0, 11.75], [32.47, 11.97], [32.25, 12.5], [32.35, 12.75], [32.25, 13.0], [32.47, 13.53]]]]}, "2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.97, 13.03], [33.5, 13.25], [33.75, 13.15], [34.0, 13.25], [34.25, 13.15], [34.32, 13.18], [34.47, 13.53], [35.0, 13.75], [35.53, 13.53], [35.68, 13.18], [36.03, 13.03], [36.25, 12.5], [36.15, 12.25], [36.25, 12.0], [36.03, 11.47], [35.68, 11.32], [35.53, 10.97], [35.13, 10.8], [35.25, 10.5], [35.03, 9.97], [34.5, 9.75], [33.97, 9.97], [33.82, 10.32], [33.47, 10.47], [33.32, 10.82], [32.97, 10.97], [32.75, 11.5], [32.96, 12.0], [32.75, 12.5], [32.97, 13.03]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.75, 11.5], [32.97, 12.03], [33.5, 12.25], [33.75, 12.15], [33.82, 12.18], [33.85, 12.25], [33.75, 12.5], [33.97, 13.03], [34.5, 13.25], [35.03, 13.03], [35.25, 12.5], [35.15, 12.25], [35.18, 12.18], [35.53, 12.03], [35.75, 11.5], [35.53, 10.97], [35.13, 10.8], [35.25, 10.5], [35.03, 9.97], [34.5, 9.75], [33.97, 9.97], [33.82, 10.32], [33.47, 10.47], [33.32, 10.82], [32.97, 10.97], [32.75, 11.5]]]]}, "2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.75, 11.5], [32.97, 12.03], [33.5, 12.25], [33.75, 12.15], [34.0, 12.25], [34.53, 12.03], [34.75, 11.5], [34.65, 11.25], [34.75, 11.0], [34.53, 10.47], [34.0, 10.25], [33.47, 10.47], [33.32, 10.82], [32.97, 10.97], [32.75, 11.5]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.75, 11.5], [32.97, 12.03], [33.5, 12.25], [33.75, 12.15], [34.0, 12.25], [34.53, 12.03], [34.75, 11.5], [34.65, 11.25], [34.75, 11.0], [34.53, 10.47], [34.0, 10.25], [33.47, 10.47], [33.32, 10.82], [32.97, 10.97], [32.75, 11.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.25883373222257}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.3934822235268824}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [35.35337727864584, 35.67080485026048, 36.30219918453332, 35.37763566516696, 35.632156444731265, 34.41874974568685, 33.980999247233115, 34.26791152954104]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [35.40269368489584, 36.21582438151046, 37.32119776407882, 37.251409149169945, 37.0870020548503, 36.26051610310873, 34.73669586181643, 35.012459055582724]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.004519371030483, 2.1208848148924178, 2.4095325939761767, 2.136883308448619, 2.6998536140402547, 2.415878389738829, 2.3752513646270095, 2.774504644905354]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.087254501052257, 2.3483456182666487, 3.091521039206043, 2.4286961045710314, 3.25883373222257, 2.7306800858424936, 2.5901925180515946, 2.94649068074483]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3631082070621785, 1.4066386622623388, 1.5916664395495714, 1.3350139332512896, 1.5831620330717617, 1.3789888197371547, 1.306038726335484, 1.5328242480454453]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3953999634174432, 1.6098941248753613, 2.092337161161261, 1.564037437409483, 1.8398790308314668, 1.6384821894868802, 1.3375818318245767, 1.6728728773648867]}}