{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:23.510811", "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-Apr-12_to_2023-Apr-14_39.0_31.0"}, "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": 2023040000531}, "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": "April 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 14 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 104857.54616534291}, "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": ["Iraq", "Saudi Arabia", "Syrian Arab Republic"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "Asia"]}, "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": 31.0}, "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": 39.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[37.32, 30.68], [37.47, 31.03], [38.0, 31.25], [38.25, 31.15], [38.32, 31.18], [38.47, 31.53], [38.82, 31.68], [38.97, 32.03], 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"Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.75, 30.0], [36.97, 30.53], [37.32, 30.68], [37.47, 31.03], [38.0, 31.25], [38.25, 31.15], [38.32, 31.18], [38.47, 31.53], [38.82, 31.68], [38.97, 32.03], [39.32, 32.18], [39.35, 32.25], [39.25, 32.5], [39.47, 33.03], [39.82, 33.18], [39.85, 33.25], [39.75, 33.5], [39.85, 33.75], [39.75, 34.0], [39.97, 34.53], [40.32, 34.68], [40.47, 35.03], [41.0, 35.25], [41.53, 35.03], [41.68, 34.68], [42.03, 34.53], [42.18, 34.18], [42.53, 34.03], [42.75, 33.5], [42.65, 33.25], [42.75, 33.0], [42.65, 32.75], [42.75, 32.5], [42.65, 32.25], [42.75, 32.0], [42.53, 31.47], [42.18, 31.32], [42.03, 30.97], [41.68, 30.82], [41.65, 30.75], [41.75, 30.5], [41.53, 29.97], [41.0, 29.75], [40.75, 29.85], [40.5, 29.75], [39.97, 29.97], [39.82, 30.32], [39.75, 30.35], [39.5, 30.25], [39.25, 30.35], [39.18, 30.32], [39.15, 30.25], [39.25, 30.0], [39.03, 29.47], [38.5, 29.25], [38.25, 29.35], [38.18, 29.32], [38.03, 28.97], [37.5, 28.75], [36.97, 28.97], [36.75, 29.5], [36.85, 29.75], [36.75, 30.0]]]]}, "2023-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.75, 30.0], [36.97, 30.53], [37.32, 30.68], [37.47, 31.03], [38.0, 31.25], [38.25, 31.15], [38.32, 31.18], [38.47, 31.53], [38.82, 31.68], [38.97, 32.03], [39.32, 32.18], [39.35, 32.25], [39.25, 32.5], [39.47, 33.03], [39.82, 33.18], [39.85, 33.25], [39.75, 33.5], [39.85, 33.75], [39.75, 34.0], [39.97, 34.53], [40.32, 34.68], [40.47, 35.03], [41.0, 35.25], [41.53, 35.03], [41.68, 34.68], [42.03, 34.53], [42.18, 34.18], [42.53, 34.03], [42.75, 33.5], [42.65, 33.25], [42.75, 33.0], [42.65, 32.75], [42.75, 32.5], [42.65, 32.25], [42.75, 32.0], [42.53, 31.47], [42.18, 31.32], [42.03, 30.97], [41.68, 30.82], [41.65, 30.75], [41.75, 30.5], [41.53, 29.97], [41.0, 29.75], [40.75, 29.85], 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30.75], [41.75, 30.5], [41.53, 29.97], [41.0, 29.75], [40.75, 29.85], [40.5, 29.75], [39.97, 29.97], [39.82, 30.32], [39.75, 30.35], [39.5, 30.25], [39.25, 30.35], [39.18, 30.32], [39.15, 30.25], [39.25, 30.0], [39.03, 29.47], [38.5, 29.25], [38.25, 29.35], [38.18, 29.32], [38.03, 28.97], [37.5, 28.75], [36.97, 28.97], [36.75, 29.5], [36.85, 29.75], [36.75, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.498535118292352}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.308739426511314}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.142174241766668, 14.092108071294035, 15.622368973211337]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.608742734269867, 11.790651079413408, 13.660279921282722]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.903646407205341, -6.127267421629819, -4.8953044506987835]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.969905470055153, -7.498535118292352, -5.785250056667451]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.474977131128471, -1.8196326838739896, -1.4416619130507564]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8730950677594886, -2.007595626982736, -1.577720660600732]}}