{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:46.547725", "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": "2022-Feb-14_to_2022-Feb-20_1.5_8.5"}, "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": 2022020001960}, "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": "February 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 20 2022"}, "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": 58163.16340941559}, "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": ["Benin", "Ghana", "Nigeria", "Togo"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 8.5}, "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": 1.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-1.0, 8.75], [-0.75, 8.65], [-0.68, 8.68], [-0.65, 8.75], [-0.75, 9.0], [-0.53, 9.53], [0.0, 9.75], [0.25, 9.65], [0.5, 9.75], [1.03, 9.53], [1.18, 9.18], [1.25, 9.15], [1.5, 9.25], [2.03, 9.03], [2.2, 8.63], [2.5, 8.75], [2.75, 8.65], [3.0, 8.75], [3.53, 8.53], [3.75, 8.0], [3.65, 7.75], [3.75, 7.5], [3.65, 7.25], [3.75, 7.0], [3.53, 6.47], [3.0, 6.25], [2.75, 6.35], [2.5, 6.25], [2.25, 6.35], [2.0, 6.25], [1.47, 6.47], [1.32, 6.82], [0.97, 6.97], [0.82, 7.32], [0.47, 7.47], [0.32, 7.82], [0.3, 7.83], [0.25, 7.85], [0.18, 7.82], [0.03, 7.47], [-0.5, 7.25], [-0.75, 7.35], [-1.0, 7.25], [-1.53, 7.47], [-1.75, 8.0], [-1.53, 8.53], [-1.0, 8.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.03, 8.47], [-0.25, 9.0], [-0.03, 9.53], [0.5, 9.75], [1.03, 9.53], [1.2, 9.13], [1.5, 9.25], [2.03, 9.03], [2.2, 8.63], [2.5, 8.75], 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.7573968264527522}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.55528465755458, 30.728086999049083, 30.511442440894484, 30.689150656014704, 31.386888051250935, 31.130666322749505, 30.615939099472598]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [31.09762658935739, 31.172251460274026, 30.96285630009021, 31.403202004594448, 31.948114253420783, 31.636707746426396, 30.840665444726255]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.6242616823610048, 1.823678586219119, 1.6204342046574045, 1.668434079639732, 2.2763916188711306, 1.746407839384582, 1.4598745070603059]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.101970203239773, 2.4709414865688473, 2.2039505071314807, 1.835223061970396, 2.7479604553444688, 1.8799949711303157, 1.4730896052104754]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5686213255371837, 1.7059867038102199, 1.4888800412661818, 1.454773619099398, 1.9726749728497335, 1.4704423501431187, 1.2629428697746738]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8465898657313349, 2.080479516443427, 1.8833881274429496, 1.5925219914888689, 2.398177045369269, 1.665512163015277, 1.2968874093103588]}}