{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:17:52.537344", "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-Aug-17_to_2020-Aug-20_26.5_13.0"}, "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": 2020080000604}, "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": "August 17 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 20 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 198379.79322926866}, "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": ["Sudan"]}, "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": 13.0}, "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": 26.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[24.25, 13.0], [24.354, 13.25], [24.25, 13.5], [24.47, 14.03], [24.823, 14.177], [24.854, 14.25], [24.75, 14.5], [24.854, 14.75], [24.75, 15.0], [24.854, 15.25], [24.75, 15.5], [24.97, 16.03], [25.5, 16.25], [25.75, 16.146], [26.0, 16.25], [26.25, 16.146], [26.5, 16.25], [27.03, 16.03], [27.177, 15.677], [27.226, 15.656], [27.25, 15.646], [27.5, 15.75], [27.75, 15.646], [28.0, 15.75], [28.53, 15.53], [28.677, 15.177], [28.75, 15.146], [29.0, 15.25], [29.53, 15.03], [29.677, 14.677], [29.75, 14.646], [29.823, 14.677], [29.97, 15.03], [30.5, 15.25], [31.03, 15.03], [31.25, 14.5], [31.03, 13.97], [30.677, 13.823], [30.53, 13.47], [30.177, 13.323], [30.03, 12.97], [29.677, 12.823], [29.53, 12.47], [29.0, 12.25], [28.75, 12.354], [28.677, 12.323], [28.646, 12.25], [28.75, 12.0], [28.53, 11.47], [28.177, 11.323], [28.146, 11.25], [28.25, 11.0], [28.03, 10.47], [27.5, 10.25], [26.97, 10.47], [26.823, 10.823], [26.75, 10.854], [26.5, 10.75], [26.25, 10.854], [26.0, 10.75], [25.47, 10.97], [25.323, 11.323], [25.274, 11.344], [25.25, 11.354], [25.0, 11.25], [24.47, 11.47], [24.25, 12.0], [24.354, 12.25], [24.25, 12.5], [24.354, 12.75], [24.25, 13.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Central-Africa", "N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-08-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.353553390593273, 12.25], [24.25, 12.5], [24.353553390593273, 12.75], [24.25, 13.0], [24.353553390593273, 13.25], [24.25, 13.5], [24.46966991411009, 14.030330085889911], [24.82322330470336, 14.176776695296637], [24.853553390593273, 14.25], [24.75, 14.5], [24.853553390593273, 14.75], [24.75, 15.0], [24.853553390593273, 15.25], [24.75, 15.5], [24.96966991411009, 16.03033008588991], [25.5, 16.25], [25.75, 16.146446609406727], [26.0, 16.25], [26.25, 16.146446609406727], [26.5, 16.25], [27.03033008588991, 16.03033008588991], [27.17677669529664, 15.676776695296637], [27.25, 15.646446609406727], [27.5, 15.75], [27.75, 15.646446609406727], [28.0, 15.75], [28.53033008588991, 15.530330085889911], [28.67677669529664, 15.176776695296637], [28.75, 15.146446609406727], [29.0, 15.25], [29.53033008588991, 15.030330085889911], [29.67677669529664, 14.676776695296637], [29.75, 14.646446609406727], [29.82322330470336, 14.676776695296637], [29.96966991411009, 15.030330085889911], [30.5, 15.25], [31.03033008588991, 15.030330085889911], [31.25, 14.5], [31.03033008588991, 13.969669914110089], [30.67677669529664, 13.823223304703363], [30.53033008588991, 13.469669914110089], [30.17677669529664, 13.323223304703363], [30.03033008588991, 12.969669914110089], [29.67677669529664, 12.823223304703363], [29.53033008588991, 12.469669914110089], [29.0, 12.25], [28.75, 12.353553390593273], [28.67677669529664, 12.323223304703363], [28.646446609406727, 12.25], [28.75, 12.0], [28.53033008588991, 11.469669914110089], [28.17677669529664, 11.323223304703363], [28.146446609406727, 11.25], [28.25, 11.0], [28.03033008588991, 10.469669914110089], [27.5, 10.25], [26.96966991411009, 10.469669914110089], [26.82322330470336, 10.823223304703363], [26.75, 10.853553390593273], [26.5, 10.75], [26.25, 10.853553390593273], [26.0, 10.75], [25.46966991411009, 10.969669914110089], [25.32322330470336, 11.323223304703363], [25.25, 11.353553390593273], [25.0, 11.25], [24.46966991411009, 11.469669914110089], [24.25, 12.0], [24.353553390593273, 12.25]]]}, "2020-08-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.353553390593273, 12.25], [24.25, 12.5], [24.353553390593273, 12.75], [24.25, 13.0], [24.353553390593273, 13.25], [24.25, 13.5], [24.46966991411009, 14.030330085889911], [24.82322330470336, 14.176776695296637], [24.853553390593273, 14.25], [24.75, 14.5], [24.853553390593273, 14.75], [24.75, 15.0], [24.853553390593273, 15.25], [24.75, 15.5], [24.96966991411009, 16.03033008588991], [25.5, 16.25], [25.75, 16.146446609406727], [26.0, 16.25], [26.25, 16.146446609406727], [26.5, 16.25], [27.03033008588991, 16.03033008588991], [27.17677669529664, 15.676776695296637], [27.25, 15.646446609406727], [27.5, 15.75], [27.75, 15.646446609406727], [28.0, 15.75], [28.53033008588991, 15.530330085889911], [28.67677669529664, 15.176776695296637], [28.75, 15.146446609406727], [29.0, 15.25], [29.53033008588991, 15.030330085889911], [29.67677669529664, 14.676776695296637], [29.75, 14.646446609406727], [29.82322330470336, 14.676776695296637], [29.96966991411009, 15.030330085889911], [30.5, 15.25], [31.03033008588991, 15.030330085889911], [31.25, 14.5], [31.03033008588991, 13.969669914110089], [30.67677669529664, 13.823223304703363], [30.53033008588991, 13.469669914110089], [30.17677669529664, 13.323223304703363], [30.03033008588991, 12.969669914110089], [29.67677669529664, 12.823223304703363], [29.53033008588991, 12.469669914110089], [29.0, 12.25], [28.75, 12.353553390593273], [28.67677669529664, 12.323223304703363], [28.646446609406727, 12.25], [28.75, 12.0], [28.53033008588991, 11.469669914110089], [28.17677669529664, 11.323223304703363], [28.146446609406727, 11.25], [28.25, 11.0], [28.03033008588991, 10.469669914110089], [27.5, 10.25], [26.96966991411009, 10.469669914110089], [26.82322330470336, 10.823223304703363], [26.75, 10.853553390593273], [26.5, 10.75], [26.25, 10.853553390593273], [26.0, 10.75], [25.46966991411009, 10.969669914110089], [25.32322330470336, 11.323223304703363], [25.25, 11.353553390593273], [25.0, 11.25], [24.46966991411009, 11.469669914110089], [24.25, 12.0], [24.353553390593273, 12.25]]]}, "2020-08-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.353553390593273, 12.25], [24.25, 12.5], [24.353553390593273, 12.75], [24.25, 13.0], [24.353553390593273, 13.25], [24.25, 13.5], [24.46966991411009, 14.030330085889911], [24.82322330470336, 14.176776695296637], [24.853553390593273, 14.25], [24.75, 14.5], [24.853553390593273, 14.75], [24.75, 15.0], [24.853553390593273, 15.25], [24.75, 15.5], [24.96966991411009, 16.03033008588991], [25.5, 16.25], [25.75, 16.146446609406727], [26.0, 16.25], [26.25, 16.146446609406727], [26.5, 16.25], [27.03033008588991, 16.03033008588991], [27.17677669529664, 15.676776695296637], [27.25, 15.646446609406727], [27.5, 15.75], [27.75, 15.646446609406727], [28.0, 15.75], [28.53033008588991, 15.530330085889911], [28.67677669529664, 15.176776695296637], [28.75, 15.146446609406727], [29.0, 15.25], [29.53033008588991, 15.030330085889911], [29.67677669529664, 14.676776695296637], [29.75, 14.646446609406727], [29.82322330470336, 14.676776695296637], [29.96966991411009, 15.030330085889911], [30.5, 15.25], [31.03033008588991, 15.030330085889911], [31.25, 14.5], [31.03033008588991, 13.969669914110089], [30.67677669529664, 13.823223304703363], [30.53033008588991, 13.469669914110089], [30.17677669529664, 13.323223304703363], [30.03033008588991, 12.969669914110089], [29.67677669529664, 12.823223304703363], [29.53033008588991, 12.469669914110089], [29.0, 12.25], [28.75, 12.353553390593273], [28.67677669529664, 12.323223304703363], [28.646446609406727, 12.25], [28.75, 12.0], [28.53033008588991, 11.469669914110089], [28.17677669529664, 11.323223304703363], [28.146446609406727, 11.25], [28.25, 11.0], [28.03033008588991, 10.469669914110089], [27.5, 10.25], [26.96966991411009, 10.469669914110089], [26.82322330470336, 10.823223304703363], [26.75, 10.853553390593273], [26.5, 10.75], [26.25, 10.853553390593273], [26.0, 10.75], [25.46966991411009, 10.969669914110089], [25.32322330470336, 11.323223304703363], [25.25, 11.353553390593273], [25.0, 11.25], [24.46966991411009, 11.469669914110089], [24.25, 12.0], [24.353553390593273, 12.25]]]}, "2020-08-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.353553390593273, 13.25], [24.25, 13.5], [24.46966991411009, 14.030330085889911], [24.82322330470336, 14.176776695296637], [24.853553390593273, 14.25], [24.75, 14.5], [24.853553390593273, 14.75], [24.75, 15.0], [24.853553390593273, 15.25], [24.75, 15.5], [24.96966991411009, 16.03033008588991], [25.5, 16.25], [25.75, 16.146446609406727], [26.0, 16.25], [26.53033008588991, 16.03033008588991], [26.67677669529664, 15.676776695296637], [26.75, 15.646446609406727], [27.0, 15.75], [27.53033008588991, 15.530330085889911], [27.75, 15.0], [27.646446609406727, 14.75], [27.75, 14.5], [27.646446609406727, 14.25], [27.75, 14.0], [27.646446609406727, 13.75], [27.67677669529664, 13.676776695296637], [28.03033008588991, 13.530330085889911], [28.25, 13.0], [28.03033008588991, 12.469669914110089], [27.5, 12.25], [27.25, 12.353553390593273], [27.17677669529664, 12.323223304703363], [27.03033008588991, 11.969669914110089], [26.5, 11.75], [26.25, 11.853553390593273], [26.17677669529664, 11.823223304703363], [26.03033008588991, 11.469669914110089], [25.5, 11.25], [24.96966991411009, 11.469669914110089], [24.75, 12.0], [24.853553390593273, 12.25], [24.82322330470336, 12.323223304703363], [24.46966991411009, 12.469669914110089], [24.25, 13.0], [24.353553390593273, 13.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.1482982702934805}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6042818548871938}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.850390592664667, 24.859181941241104, 24.48952361749997, 24.831796227217183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.352948455285173, 23.408196527666746, 23.085570977551868, 23.37216517611347]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4911322389248913, -2.508171788073826, -2.923512416738533, -2.354003302508082]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2351389421917816, -4.1482982702934805, -3.63675242258779, -3.0428816257410745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7188149056827788, -1.6487087995204421, -1.9730984412883465, -1.4925671900071364]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1456613933589748, -2.8060183666055867, -2.6961590758761784, -1.8377726960063339]}}