{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:58.506901", "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-Dec-04_to_2020-Dec-11_42.0_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": 2020120001684}, "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": "December 04 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 11 2020"}, "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": 103148.16857296927}, "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": ["Djibouti", "Ethiopia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[43.146, 11.749], [43.25, 11.5], [43.146, 11.251], [43.146, 11.25], [43.25, 11.0], [43.146, 10.75], [43.25, 10.5], [43.146, 10.25], [43.25, 10.0], [43.03, 9.47], [42.5, 9.25], [42.25, 9.354], [42.0, 9.25], [41.75, 9.354], [41.726, 9.344], [41.677, 9.323], [41.53, 8.97], [41.0, 8.75], [40.75, 8.854], [40.726, 8.844], [40.677, 8.823], [40.53, 8.47], [40.0, 8.25], [39.47, 8.47], [39.25, 9.0], [39.354, 9.25], [39.25, 9.5], [39.354, 9.75], [39.25, 10.0], [39.47, 10.53], [39.823, 10.677], [39.854, 10.75], [39.75, 11.0], [39.854, 11.25], [39.75, 11.5], [39.97, 12.03], [40.323, 12.177], [40.457, 12.5], [40.25, 13.0], [40.47, 13.53], [41.0, 13.75], [41.25, 13.646], [41.5, 13.75], [42.03, 13.53], [42.177, 13.177], [42.25, 13.146], [42.5, 13.25], [43.03, 13.03], [43.25, 12.5], [43.146, 12.25], [43.25, 12.0], [43.146, 11.75], [43.146, 11.749]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[40.82322330470336, 12.323223304703363], [40.46966991411009, 12.469669914110089], [40.25, 13.0], [40.46966991411009, 13.530330085889911], [41.0, 13.75], [41.25, 13.646446609406725], [41.5, 13.75], [42.03033008588991, 13.530330085889911], [42.17677669529664, 13.176776695296637], [42.25, 13.146446609406725], [42.5, 13.25], [43.03033008588991, 13.030330085889911], [43.25, 12.5], [43.03033008588991, 11.969669914110089], [42.5, 11.75], [42.25, 11.853553390593275], [42.0, 11.75], [41.75, 11.853553390593275], [41.5, 11.75], [40.96966991411009, 11.969669914110089], [40.82322330470336, 12.323223304703363]]]}, "2020-12-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[39.35355339059328, 9.25], [39.25, 9.5], [39.35355339059328, 9.75], [39.25, 10.0], [39.46966991411009, 10.530330085889911], [39.82322330470336, 10.676776695296637], [39.85355339059328, 10.75], [39.75, 11.0], [39.85355339059328, 11.25], [39.75, 11.5], [39.96966991411009, 12.030330085889911], [40.32322330470336, 12.176776695296637], [40.45710678118655, 12.5], [40.25, 13.0], [40.46966991411009, 13.530330085889911], [41.0, 13.75], [41.25, 13.646446609406725], [41.5, 13.75], [42.03033008588991, 13.530330085889911], [42.17677669529664, 13.176776695296637], [42.25, 13.146446609406725], [42.5, 13.25], [43.03033008588991, 13.030330085889911], [43.25, 12.5], [43.14644660940672, 12.25], [43.25, 12.0], [43.04289321881345, 11.5], [43.25, 11.0], [43.14644660940672, 10.75], [43.25, 10.5], [43.14644660940672, 10.25], [43.25, 10.0], [43.03033008588991, 9.469669914110089], [42.5, 9.25], [42.25, 9.353553390593275], [42.0, 9.25], [41.75, 9.353553390593275], [41.67677669529664, 9.323223304703363], [41.53033008588991, 8.969669914110089], [41.0, 8.75], [40.75, 8.853553390593275], [40.67677669529664, 8.823223304703363], [40.53033008588991, 8.469669914110089], [40.0, 8.25], [39.46966991411009, 8.469669914110089], [39.25, 9.0], [39.35355339059328, 9.25]]]}, "2020-12-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[39.35355339059328, 9.25], [39.25, 9.5], [39.35355339059328, 9.75], [39.25, 10.0], [39.46966991411009, 10.530330085889911], [39.82322330470336, 10.676776695296637], [39.85355339059328, 10.75], [39.75, 11.0], [39.85355339059328, 11.25], [39.75, 11.5], [39.96966991411009, 12.030330085889911], [40.32322330470336, 12.176776695296637], [40.45710678118655, 12.5], [40.25, 13.0], [40.46966991411009, 13.530330085889911], [41.0, 13.75], [41.25, 13.646446609406725], [41.5, 13.75], [42.03033008588991, 13.530330085889911], [42.17677669529664, 13.176776695296637], [42.25, 13.146446609406725], [42.5, 13.25], [43.03033008588991, 13.030330085889911], [43.25, 12.5], [43.14644660940672, 12.25], [43.25, 12.0], [43.14644660940672, 11.75], [43.25, 11.5], [43.14644660940672, 11.25], [43.25, 11.0], [43.14644660940672, 10.75], [43.25, 10.5], [43.14644660940672, 10.25], [43.25, 10.0], [43.03033008588991, 9.469669914110089], [42.5, 9.25], [42.25, 9.353553390593275], [42.0, 9.25], [41.75, 9.353553390593275], [41.67677669529664, 9.323223304703363], [41.53033008588991, 8.969669914110089], [41.0, 8.75], [40.75, 8.853553390593275], [40.67677669529664, 8.823223304703363], [40.53033008588991, 8.469669914110089], [40.0, 8.25], [39.46966991411009, 8.469669914110089], [39.25, 9.0], [39.35355339059328, 9.25]]]}, "2020-12-07T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[39.35355339059328, 9.25], [39.25, 9.5], [39.35355339059328, 9.75], [39.25, 10.0], [39.46966991411009, 10.530330085889911], [39.82322330470336, 10.676776695296637], [39.85355339059328, 10.75], [39.75, 11.0], [39.85355339059328, 11.25], [39.75, 11.5], [39.96966991411009, 12.030330085889911], [40.32322330470336, 12.176776695296637], [40.46966991411009, 12.530330085889911], [40.875, 12.698223304703363], [40.75, 13.0], [40.96966991411009, 13.530330085889911], [41.5, 13.75], [42.03033008588991, 13.530330085889911], [42.25, 13.0], [42.125, 12.698223304703363], [42.25, 12.646446609406725], [42.5, 12.75], [43.03033008588991, 12.530330085889911], [43.25, 12.0], [43.14644660940672, 11.75], [43.25, 11.5], [43.14644660940672, 11.25], [43.25, 11.0], [43.14644660940672, 10.75], [43.25, 10.5], [43.14644660940672, 10.25], [43.25, 10.0], [43.03033008588991, 9.469669914110089], [42.5, 9.25], [42.25, 9.353553390593275], [42.0, 9.25], [41.75, 9.353553390593275], [41.67677669529664, 9.323223304703363], [41.53033008588991, 8.969669914110089], [41.0, 8.75], [40.75, 8.853553390593275], [40.67677669529664, 8.823223304703363], [40.53033008588991, 8.469669914110089], [40.0, 8.25], [39.46966991411009, 8.469669914110089], [39.25, 9.0], [39.35355339059328, 9.25]]]}, "2020-12-08T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[39.85355339059328, 9.75], [39.75, 10.0], [39.96966991411009, 10.530330085889911], [40.32322330470336, 10.676776695296637], [40.35355339059328, 10.75], [40.25, 11.0], [40.35355339059328, 11.25], [40.25, 11.5], [40.46966991411009, 12.030330085889911], [40.82322330470336, 12.176776695296637], [40.96966991411009, 12.530330085889911], [41.5, 12.75], [41.75, 12.646446609406725], [42.0, 12.75], [42.25, 12.646446609406725], [42.5, 12.75], [43.03033008588991, 12.530330085889911], [43.25, 12.0], [43.14644660940672, 11.75], [43.25, 11.5], [43.14644660940672, 11.25], [43.25, 11.0], [43.14644660940672, 10.75], [43.25, 10.5], [43.03033008588991, 9.969669914110089], [42.5, 9.75], [42.25, 9.853553390593275], [42.17677669529664, 9.823223304703363], [42.03033008588991, 9.469669914110089], [41.5, 9.25], [41.19822330470336, 9.375], [41.03033008588991, 8.969669914110089], [40.5, 8.75], [39.96966991411009, 8.969669914110089], [39.75, 9.5], [39.85355339059328, 9.75]]]}, "2020-12-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[40.82322330470336, 10.823223304703363], [40.46966991411009, 10.969669914110089], [40.25, 11.5], [40.46966991411009, 12.030330085889911], [41.0, 12.25], [41.25, 12.146446609406725], [41.5, 12.25], [41.75, 12.146446609406725], [42.0, 12.25], [42.53033008588991, 12.030330085889911], [42.75, 11.5], [42.53033008588991, 10.969669914110089], [42.17677669529664, 10.823223304703363], [42.03033008588991, 10.469669914110089], [41.5, 10.25], [40.96966991411009, 10.469669914110089], [40.82322330470336, 10.823223304703363]]]}, "2020-12-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[40.82322330470336, 10.823223304703363], [40.46966991411009, 10.969669914110089], [40.25, 11.5], [40.46966991411009, 12.030330085889911], [41.0, 12.25], [41.25, 12.146446609406725], [41.5, 12.25], [41.75, 12.146446609406725], [42.0, 12.25], [42.53033008588991, 12.030330085889911], [42.75, 11.5], [42.53033008588991, 10.969669914110089], [42.17677669529664, 10.823223304703363], [42.03033008588991, 10.469669914110089], [41.5, 10.25], [40.96966991411009, 10.469669914110089], [40.82322330470336, 10.823223304703363]]]}, "2020-12-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[40.85355339059328, 11.25], [40.75, 11.5], [40.96966991411009, 12.030330085889911], [41.5, 12.25], [41.75, 12.146446609406725], [42.0, 12.25], [42.53033008588991, 12.030330085889911], [42.75, 11.5], [42.53033008588991, 10.969669914110089], [42.17677669529664, 10.823223304703363], [42.03033008588991, 10.469669914110089], [41.5, 10.25], [40.96966991411009, 10.469669914110089], [40.75, 11.0], [40.85355339059328, 11.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.6830018492102568}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.241089594061663}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.782675194626904, 27.159714907179477, 27.411214450875605, 27.301584351821475, 26.695406224877274, 27.26227777112217, 27.192450747476073, 26.764219335540133]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [32.18361193326808, 32.42602024387372, 31.60232398493423, 29.675157969790348, 28.739100206483442, 27.854170251968696, 27.71694294722647, 27.516886280574738]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.5443875033291192, 2.130161537572998, 2.433353192774547, 2.6144940555186094, 2.009015792769964, 1.6888817711412543, 1.7182427669164326, 1.5352853078467963]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.859591436959306, 3.001490148841185, 3.272939218299541, 3.6830018492102568, 2.6066465867480133, 1.799509195816313, 1.8102624863445271, 1.6698371245370254]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4307405423522581, 1.7737019131253469, 2.0168085737654664, 2.1301937582813326, 1.6143504600085, 1.3403675874187158, 1.3848035924647462, 1.3147785919991613]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6571902013914153, 2.282027746538104, 2.6774417623571725, 3.2544327669362714, 2.1839108258948987, 1.4170412196514799, 1.4001235285917497, 1.3921148730216628]}}