{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:03.176594", "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-Sep-29_to_2022-Oct-02_42.0_24.5"}, "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": 2022090001066}, "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 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2022"}, "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": 69646.7975169934}, "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": 24.5}, "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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 39.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.75, 27.15], [39.82, 27.18], [39.97, 27.53], [40.32, 27.68], [40.47, 28.03], [41.0, 28.25], [41.53, 28.03], [41.75, 27.5], [41.65, 27.25], [41.75, 27.0], [41.65, 26.75], [41.68, 26.68], [42.03, 26.53], [42.25, 26.0], [42.13, 25.7], [42.25, 25.65], [42.5, 25.75], [43.03, 25.53], [43.25, 25.0], [43.15, 24.75], [43.25, 24.5], [43.03, 23.97], [42.68, 23.82], [42.53, 23.47], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [41.25, 23.85], [41.0, 23.75], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.82, 24.82], [39.47, 24.97], [39.25, 25.5], [39.35, 25.75], [39.32, 25.82], [39.25, 25.85], [39.0, 25.75], [38.47, 25.97], [38.25, 26.5], [38.47, 27.03], [39.0, 27.25], [39.25, 27.15], [39.5, 27.25], [39.75, 27.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.0, 25.75], [38.47, 25.97], [38.25, 26.5], [38.47, 27.03], [39.0, 27.25], [39.25, 27.15], [39.5, 27.25], [39.75, 27.15], [39.82, 27.18], [39.97, 27.53], [40.32, 27.68], [40.47, 28.03], [41.0, 28.25], [41.53, 28.03], [41.75, 27.5], [41.65, 27.25], [41.75, 27.0], [41.53, 26.47], [41.0, 26.25], [40.75, 26.35], [40.68, 26.32], [40.53, 25.97], [40.0, 25.75], [39.75, 25.85], [39.5, 25.75], [39.25, 25.85], [39.0, 25.75]]]]}, "2022-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.0, 25.75], [38.47, 25.97], [38.25, 26.5], [38.47, 27.03], [39.0, 27.25], [39.25, 27.15], [39.5, 27.25], [39.75, 27.15], [39.82, 27.18], [39.97, 27.53], [40.32, 27.68], [40.47, 28.03], [41.0, 28.25], [41.53, 28.03], [41.75, 27.5], [41.65, 27.25], [41.75, 27.0], [41.65, 26.75], [41.68, 26.68], [42.03, 26.53], [42.25, 26.0], [42.13, 25.7], [42.25, 25.65], [42.5, 25.75], [43.03, 25.53], [43.25, 25.0], [43.15, 24.75], [43.25, 24.5], [43.03, 23.97], [42.68, 23.82], [42.53, 23.47], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [41.25, 23.85], [41.0, 23.75], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.82, 24.82], [39.47, 24.97], [39.25, 25.5], [39.35, 25.75], [39.32, 25.82], [39.25, 25.85], [39.0, 25.75]]]]}, "2022-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.0, 25.75], [38.47, 25.97], [38.25, 26.5], [38.47, 27.03], [39.0, 27.25], [39.25, 27.15], [39.5, 27.25], [39.75, 27.15], [39.82, 27.18], [39.97, 27.53], [40.32, 27.68], [40.47, 28.03], [41.0, 28.25], [41.53, 28.03], [41.75, 27.5], [41.65, 27.25], [41.75, 27.0], [41.65, 26.75], [41.68, 26.68], [42.03, 26.53], [42.25, 26.0], [42.13, 25.7], [42.25, 25.65], [42.5, 25.75], [43.03, 25.53], [43.25, 25.0], [43.15, 24.75], [43.25, 24.5], [43.03, 23.97], [42.68, 23.82], [42.53, 23.47], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [41.25, 23.85], [41.0, 23.75], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.82, 24.82], [39.47, 24.97], [39.25, 25.5], [39.35, 25.75], [39.32, 25.82], [39.25, 25.85], [39.0, 25.75]]]]}, "2022-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.97, 25.97], [38.75, 26.5], [38.97, 27.03], [39.5, 27.25], [39.75, 27.15], [40.0, 27.25], [40.25, 27.15], [40.5, 27.25], [40.75, 27.15], [41.0, 27.25], [41.53, 27.03], [41.68, 26.68], [42.03, 26.53], [42.25, 26.0], [42.13, 25.7], [42.25, 25.65], [42.5, 25.75], [43.03, 25.53], [43.25, 25.0], [43.15, 24.75], [43.25, 24.5], [43.03, 23.97], [42.68, 23.82], [42.53, 23.47], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [41.25, 23.85], [41.0, 23.75], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.82, 24.82], [39.47, 24.97], [39.25, 25.5], [39.35, 25.75], [39.32, 25.82], [38.97, 25.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4906143321624086}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5651865297007714}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.45802632917099, 27.008092080250947, 26.592674768505617, 27.23231178326978]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.80593665550947, 24.839740749033297, 24.570199900490024, 25.411579231718747]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7125638594431414, -2.577686377133225, -2.7831080230651106, -2.248767601206769]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4906143321624086, -3.3612759690960274, -3.420025776240493, -2.8654139417330953]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5608321063258517, -1.7721631792017576, -1.926193133089016, -1.6214203982929614]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7621799257173536, -2.202871852865708, -2.6011142907620632, -2.1862842202154202]}}