{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:01.655933", "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-Feb-14_to_2023-Feb-18_42.5_29.5"}, "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": 2023020000594}, "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 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 18 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 67880.35907049356}, "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": ["Saudi Arabia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 29.5}, "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": 42.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.47, 29.03], [40.0, 29.25], [40.25, 29.15], [40.32, 29.18], [40.47, 29.53], [41.0, 29.75], [41.25, 29.65], [41.32, 29.68], [41.35, 29.75], [41.25, 30.0], [41.47, 30.53], [42.0, 30.75], [42.25, 30.65], [42.5, 30.75], [43.03, 30.53], [43.18, 30.18], [43.53, 30.03], [43.75, 29.5], [43.54, 29.0], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.18, 26.82], [43.03, 26.47], [42.5, 26.25], [41.97, 26.47], [41.75, 27.0], [41.85, 27.25], [41.82, 27.32], [41.75, 27.35], [41.5, 27.25], [40.97, 27.47], [40.82, 27.82], [40.75, 27.85], [40.5, 27.75], [40.25, 27.85], [40.0, 27.75], [39.47, 27.97], [39.25, 28.5], [39.47, 29.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.97, 28.47], [40.75, 29.0], [40.97, 29.53], [41.32, 29.68], [41.47, 30.03], [42.0, 30.25], [42.25, 30.15], [42.5, 30.25], [42.75, 30.15], [43.0, 30.25], [43.53, 30.03], [43.75, 29.5], [43.54, 29.0], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.0, 26.75], [42.47, 26.97], [42.32, 27.32], [41.97, 27.47], [41.82, 27.82], [41.47, 27.97], [41.32, 28.32], [40.97, 28.47]]]]}, "2023-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.0, 27.75], [39.47, 27.97], [39.25, 28.5], [39.47, 29.03], [40.0, 29.25], [40.25, 29.15], [40.32, 29.18], [40.47, 29.53], [41.0, 29.75], [41.25, 29.65], [41.32, 29.68], [41.35, 29.75], [41.25, 30.0], [41.47, 30.53], [42.0, 30.75], [42.25, 30.65], [42.5, 30.75], [43.03, 30.53], [43.18, 30.18], [43.53, 30.03], [43.75, 29.5], [43.54, 29.0], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.0, 26.75], [42.75, 26.85], [42.5, 26.75], [41.97, 26.97], [41.82, 27.32], [41.75, 27.35], [41.5, 27.25], [40.97, 27.47], [40.82, 27.82], [40.75, 27.85], [40.5, 27.75], [40.25, 27.85], [40.0, 27.75]]]]}, "2023-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.0, 27.75], [39.47, 27.97], [39.25, 28.5], [39.47, 29.03], [40.0, 29.25], [40.25, 29.15], [40.32, 29.18], [40.47, 29.53], [41.0, 29.75], [41.25, 29.65], [41.32, 29.68], [41.35, 29.75], [41.25, 30.0], [41.47, 30.53], [42.0, 30.75], [42.25, 30.65], [42.5, 30.75], [43.03, 30.53], [43.18, 30.18], [43.53, 30.03], [43.75, 29.5], [43.54, 29.0], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.18, 26.82], [43.03, 26.47], [42.5, 26.25], [41.97, 26.47], [41.75, 27.0], [41.85, 27.25], [41.82, 27.32], [41.75, 27.35], [41.5, 27.25], [40.97, 27.47], [40.82, 27.82], [40.75, 27.85], [40.5, 27.75], [40.25, 27.85], [40.0, 27.75]]]]}, "2023-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.0, 27.75], [39.47, 27.97], [39.25, 28.5], [39.47, 29.03], [40.0, 29.25], [40.25, 29.15], [40.32, 29.18], [40.47, 29.53], [41.0, 29.75], [41.25, 29.65], [41.32, 29.68], [41.35, 29.75], [41.25, 30.0], [41.47, 30.53], [42.0, 30.75], [42.25, 30.65], [42.5, 30.75], [43.03, 30.53], [43.18, 30.18], [43.53, 30.03], [43.75, 29.5], [43.54, 29.0], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.18, 26.82], [43.03, 26.47], [42.5, 26.25], [41.97, 26.47], [41.75, 27.0], [41.85, 27.25], [41.82, 27.32], [41.75, 27.35], [41.5, 27.25], [40.97, 27.47], [40.82, 27.82], [40.75, 27.85], [40.5, 27.75], [40.25, 27.85], [40.0, 27.75]]]]}, "2023-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, 29.0], [40.47, 29.53], [41.0, 29.75], [41.25, 29.65], [41.32, 29.68], [41.47, 30.03], [41.82, 30.18], [41.97, 30.53], [42.5, 30.75], [43.03, 30.53], [43.25, 30.0], [43.15, 29.75], [43.25, 29.5], [43.15, 29.25], [43.18, 29.18], [43.53, 29.03], [43.68, 28.68], [44.03, 28.53], [44.25, 28.0], [44.15, 27.75], [44.25, 27.5], [44.03, 26.97], [43.5, 26.75], [43.25, 26.85], [43.18, 26.82], [43.03, 26.47], [42.5, 26.25], [41.97, 26.47], [41.75, 27.0], [41.85, 27.25], [41.82, 27.32], [41.47, 27.47], [41.32, 27.82], [41.25, 27.85], [41.0, 27.75], [40.47, 27.97], [40.25, 28.5], [40.35, 28.75], [40.25, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.121119970244763}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.8484956414515015}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.658655204474371, 7.419441421888735, 8.607346742080665, 8.448315181632381, 8.648098379897817]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.777105587257267, 6.505986735459203, 6.838699320516582, 7.527005963894055, 7.648464016736]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.105046733168941, -5.3148933136252055, -4.457077686533251, -4.774837541215032, -4.690577739584247]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.730431414501254, -6.121119970244763, -4.8139492006629325, -5.470634390409657, -5.134744163394998]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4790954426220897, -1.5791647413326524, -1.3208257808863946, -1.4122417548092576, -1.3631041839087799]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6715411863344063, -1.8708867176158628, -1.4263671953340957, -1.6310142157354584, -1.5030578391431524]}}