{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:15.854177", "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-Sep-19_to_2020-Sep-24_346.5_17.5"}, "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": 2020090000523}, "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": "September 19 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 24 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 50039.07610072475}, "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": ["Mauritania"]}, "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": 17.5}, "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": 346.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "346.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 346.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-14.75, 17.5], [-14.646, 17.75], [-14.75, 18.0], [-14.53, 18.53], [-14.177, 18.677], [-14.03, 19.03], [-13.677, 19.177], [-13.53, 19.53], [-13.0, 19.75], [-12.47, 19.53], [-12.323, 19.177], [-12.25, 19.146], [-12.0, 19.25], [-11.47, 19.03], [-11.25, 18.5], [-11.47, 17.97], [-11.823, 17.823], [-11.957, 17.5], [-11.75, 17.0], [-11.97, 16.47], [-12.323, 16.323], [-12.47, 15.97], [-13.0, 15.75], [-13.53, 15.97], [-13.677, 16.323], [-13.75, 16.354], [-13.751, 16.354], [-14.0, 16.25], [-14.53, 16.47], [-14.75, 17.0], [-14.646, 17.25], [-14.75, 17.5]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-09-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-13.67677669529661, 16.32322330470336], [-14.030330085889887, 16.46966991411009], [-14.25, 17.0], [-14.030330085889887, 17.53033008588991], [-13.5, 17.75], [-12.969669914110113, 17.53033008588991], [-12.82322330470339, 17.17677669529664], [-12.469669914110113, 17.03033008588991], [-12.25, 16.5], [-12.469669914110113, 15.969669914110089], [-13.0, 15.75], [-13.530330085889887, 15.969669914110089], [-13.67677669529661, 16.32322330470336]]]}, "2020-09-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.646446609406723, 17.25], [-14.75, 17.5], [-14.646446609406723, 17.75], [-14.75, 18.0], [-14.530330085889887, 18.53033008588991], [-14.17677669529661, 18.67677669529664], [-14.030330085889887, 19.03033008588991], [-13.67677669529661, 19.17677669529664], [-13.530330085889887, 19.53033008588991], [-13.0, 19.75], [-12.469669914110113, 19.53033008588991], [-12.32322330470339, 19.17677669529664], [-12.25, 19.146446609406723], [-12.0, 19.25], [-11.469669914110113, 19.03033008588991], [-11.25, 18.5], [-11.469669914110113, 17.96966991411009], [-11.82322330470339, 17.82322330470336], [-11.957106781186553, 17.5], [-11.75, 17.0], [-11.969669914110113, 16.46966991411009], [-12.32322330470339, 16.32322330470336], [-12.469669914110113, 15.969669914110089], [-13.0, 15.75], [-13.530330085889887, 15.969669914110089], [-13.67677669529661, 16.32322330470336], [-13.75, 16.353553390593277], [-14.0, 16.25], [-14.530330085889887, 16.46966991411009], [-14.75, 17.0], [-14.646446609406723, 17.25]]]}, "2020-09-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.646446609406723, 17.25], [-14.75, 17.5], [-14.646446609406723, 17.75], [-14.75, 18.0], [-14.530330085889887, 18.53033008588991], [-14.17677669529661, 18.67677669529664], [-14.030330085889887, 19.03033008588991], [-13.67677669529661, 19.17677669529664], [-13.530330085889887, 19.53033008588991], [-13.0, 19.75], [-12.469669914110113, 19.53033008588991], [-12.32322330470339, 19.17677669529664], [-12.25, 19.146446609406723], [-12.0, 19.25], [-11.469669914110113, 19.03033008588991], [-11.25, 18.5], [-11.469669914110113, 17.96966991411009], [-11.82322330470339, 17.82322330470336], [-11.957106781186553, 17.5], [-11.75, 17.0], [-11.969669914110113, 16.46966991411009], [-12.32322330470339, 16.32322330470336], [-12.469669914110113, 15.969669914110089], [-13.0, 15.75], [-13.530330085889887, 15.969669914110089], [-13.67677669529661, 16.32322330470336], [-13.75, 16.353553390593277], [-14.0, 16.25], [-14.530330085889887, 16.46966991411009], [-14.75, 17.0], [-14.646446609406723, 17.25]]]}, "2020-09-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.646446609406723, 17.25], [-14.75, 17.5], [-14.646446609406723, 17.75], [-14.75, 18.0], [-14.530330085889887, 18.53033008588991], [-14.17677669529661, 18.67677669529664], [-14.030330085889887, 19.03033008588991], [-13.67677669529661, 19.17677669529664], [-13.530330085889887, 19.53033008588991], [-13.0, 19.75], [-12.469669914110113, 19.53033008588991], [-12.32322330470339, 19.17677669529664], [-12.25, 19.146446609406723], [-12.0, 19.25], [-11.469669914110113, 19.03033008588991], [-11.25, 18.5], [-11.469669914110113, 17.96966991411009], [-11.82322330470339, 17.82322330470336], [-11.957106781186553, 17.5], [-11.75, 17.0], [-11.969669914110113, 16.46966991411009], [-12.32322330470339, 16.32322330470336], [-12.469669914110113, 15.969669914110089], [-13.0, 15.75], [-13.530330085889887, 15.969669914110089], [-13.67677669529661, 16.32322330470336], [-13.75, 16.353553390593277], [-14.0, 16.25], [-14.530330085889887, 16.46966991411009], [-14.75, 17.0], [-14.646446609406723, 17.25]]]}, "2020-09-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.17677669529661, 18.17677669529664], [-14.030330085889887, 18.53033008588991], [-13.5, 18.75], [-13.0, 18.542893218813443], [-12.5, 18.75], [-11.969669914110113, 18.53033008588991], [-11.75, 18.0], [-11.957106781186553, 17.5], [-11.75, 17.0], [-11.969669914110113, 16.46966991411009], [-12.5, 16.25], [-13.030330085889887, 16.46966991411009], [-13.17677669529661, 16.82322330470336], [-13.25, 16.853553390593277], [-13.5, 16.75], [-13.75, 16.853553390593277], [-14.0, 16.75], [-14.530330085889887, 16.96966991411009], [-14.75, 17.5], [-14.530330085889887, 18.03033008588991], [-14.17677669529661, 18.17677669529664]]]}, "2020-09-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-13.75, 16.853553390593277], [-14.0, 16.75], [-14.530330085889887, 16.96966991411009], [-14.75, 17.5], [-14.530330085889887, 18.03033008588991], [-14.0, 18.25], [-13.75, 18.146446609406723], [-13.5, 18.25], [-12.969669914110113, 18.03033008588991], [-12.75, 17.5], [-12.969669914110113, 16.96966991411009], [-13.5, 16.75], [-13.75, 16.853553390593277]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.396352626311511}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5519615324824185}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.70366317058125, 29.285899289685233, 28.940368874437013, 29.57091275984186, 29.548367369534446, 28.495792141684205]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.562098927928844, 28.72749720607635, 28.4259889432891, 28.952849260425694, 28.92120407832556, 28.482406868952523]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.901216021044746, -3.5396565763900765, -3.8785754566888566, -3.2968636231799753, -3.378201062778203, -4.220694453133689]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.002377589045068, -4.331250865642119, -4.365895594337076, -3.947901190765606, -3.9791021626205065, -4.396352626311511]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4786823669498244, -1.8797535546142279, -1.9961383503085832, -1.7287500761918315, -1.710484956846219, -2.032714629402956]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5060819425464758, -2.459115688618701, -2.1823179866291613, -2.015966642538225, -1.9921299819454663, -2.0717608267591863]}}