{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:47.254369", "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": "2023-Jun-16_to_2023-Jun-19_21.0_30.5"}, "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": 2023060000570}, "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": "June 16 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 19 2023"}, "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": 61955.657654135095}, "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": ["Libya"]}, "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": 30.5}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.68, 29.18], [23.03, 29.03], [23.25, 28.5], [23.15, 28.25], [23.25, 28.0], [23.15, 27.75], [23.25, 27.5], [23.03, 26.97], [22.5, 26.75], [22.25, 26.85], [22.0, 26.75], [21.75, 26.85], [21.5, 26.75], [20.97, 26.97], [20.75, 27.5], [20.85, 27.75], [20.75, 28.0], [20.85, 28.25], [20.82, 28.32], [20.47, 28.47], [20.32, 28.82], [19.97, 28.97], [19.75, 29.5], [19.85, 29.75], [19.75, 30.0], [19.85, 30.25], [19.82, 30.32], [19.47, 30.47], [19.25, 31.0], [19.47, 31.53], [19.82, 31.68], [19.97, 32.03], [20.5, 32.25], [21.03, 32.03], [21.18, 31.68], [21.53, 31.53], [21.68, 31.18], [22.03, 31.03], [22.25, 30.5], [22.15, 30.25], [22.25, 30.0], [22.13, 29.7], [22.53, 29.53], [22.68, 29.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 30.47], [19.25, 31.0], [19.47, 31.53], [20.0, 31.75], [20.25, 31.65], [20.5, 31.75], [20.75, 31.65], [21.0, 31.75], [21.53, 31.53], [21.68, 31.18], [22.03, 31.03], [22.25, 30.5], [22.15, 30.25], [22.25, 30.0], [22.03, 29.47], [21.68, 29.32], [21.65, 29.25], [21.75, 29.0], [21.53, 28.47], [21.0, 28.25], [20.47, 28.47], [20.32, 28.82], [19.97, 28.97], [19.75, 29.5], [19.85, 29.75], [19.75, 30.0], [19.85, 30.25], [19.82, 30.32], [19.47, 30.47]]]]}, "2023-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 30.47], [19.25, 31.0], [19.47, 31.53], [19.82, 31.68], [19.97, 32.03], [20.5, 32.25], [21.03, 32.03], [21.18, 31.68], [21.53, 31.53], [21.68, 31.18], [22.03, 31.03], [22.25, 30.5], [22.15, 30.25], [22.25, 30.0], [22.13, 29.7], [22.53, 29.53], [22.68, 29.18], [23.03, 29.03], [23.25, 28.5], [23.15, 28.25], [23.25, 28.0], [23.15, 27.75], [23.25, 27.5], [23.03, 26.97], [22.5, 26.75], [22.25, 26.85], [22.0, 26.75], [21.75, 26.85], [21.5, 26.75], [20.97, 26.97], [20.75, 27.5], [20.85, 27.75], [20.75, 28.0], [20.85, 28.25], [20.82, 28.32], [20.47, 28.47], [20.32, 28.82], [19.97, 28.97], [19.75, 29.5], [19.85, 29.75], [19.75, 30.0], [19.85, 30.25], [19.82, 30.32], [19.47, 30.47]]]]}, "2023-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 30.47], [19.25, 31.0], [19.47, 31.53], [19.82, 31.68], [19.97, 32.03], [20.5, 32.25], [21.03, 32.03], [21.18, 31.68], [21.53, 31.53], [21.68, 31.18], [22.03, 31.03], [22.25, 30.5], [22.15, 30.25], [22.25, 30.0], [22.13, 29.7], [22.53, 29.53], [22.68, 29.18], [23.03, 29.03], [23.25, 28.5], [23.15, 28.25], [23.25, 28.0], [23.15, 27.75], [23.25, 27.5], [23.03, 26.97], [22.5, 26.75], [22.25, 26.85], [22.0, 26.75], [21.75, 26.85], [21.5, 26.75], [20.97, 26.97], [20.75, 27.5], [20.85, 27.75], [20.75, 28.0], [20.85, 28.25], [20.82, 28.32], [20.47, 28.47], [20.32, 28.82], [19.97, 28.97], [19.75, 29.5], [19.85, 29.75], [19.75, 30.0], [19.85, 30.25], [19.82, 30.32], [19.47, 30.47]]]]}, "2023-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.85, 28.25], [20.75, 28.5], [20.97, 29.03], [21.32, 29.18], [21.47, 29.53], [22.0, 29.75], [22.53, 29.53], [22.68, 29.18], [23.03, 29.03], [23.25, 28.5], [23.15, 28.25], [23.25, 28.0], [23.15, 27.75], [23.25, 27.5], [23.03, 26.97], [22.5, 26.75], [22.25, 26.85], [22.0, 26.75], [21.75, 26.85], [21.5, 26.75], [20.97, 26.97], [20.75, 27.5], [20.85, 27.75], [20.75, 28.0], [20.85, 28.25]]], [[[19.25, 31.0], [19.47, 31.53], [19.82, 31.68], [19.97, 32.03], [20.5, 32.25], [21.03, 32.03], [21.25, 31.5], [21.15, 31.25], [21.18, 31.18], [21.53, 31.03], [21.75, 30.5], [21.53, 29.97], [21.0, 29.75], [20.75, 29.85], [20.5, 29.75], [19.97, 29.97], [19.82, 30.32], [19.47, 30.47], [19.25, 31.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.3510704289727755}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6359879627349145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.025684201941715, 25.802436637335745, 25.9597882355593, 26.475924383555764]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.859400747981226, 23.032206648322756, 22.82087191820864, 23.208373574240056]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7480950160993465, -3.7851807041984227, -3.6542619189640244, -3.2895200502480217]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.214364409524535, -4.3510704289727755, -4.137532719940509, -3.6503304744323373]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3338257823012754, -1.4330638473109587, -1.3992436533458794, -1.292716083276808]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4517935439554928, -1.613965310939751, -1.5675612026090426, -1.4169930319807833]}}