{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:18.971346", "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-Nov-01_to_2022-Nov-05_42.0_-0.5"}, "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": 2022110000069}, "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": "November 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 05 2022"}, "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": 61815.43761324777}, "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": ["Kenya", "Somalia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Indian Ocean"]}, "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": -0.5}, "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": 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": -1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 1.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.47, -0.53], [39.25, 0.0], [39.47, 0.53], [40.0, 0.75], [40.25, 0.65], [40.5, 0.75], [40.75, 0.65], [40.82, 0.68], [40.85, 0.75], [40.75, 1.0], [40.97, 1.53], [41.5, 1.75], [41.75, 1.65], [41.82, 1.68], [41.97, 2.03], [42.5, 2.25], [42.75, 2.15], [43.0, 2.25], [43.53, 2.03], [43.68, 1.68], [44.03, 1.53], [44.25, 1.0], [44.03, 0.47], [43.5, 0.25], [43.25, 0.35], [43.0, 0.25], [42.75, 0.35], [42.68, 0.32], [42.65, 0.25], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.18, -1.18], [42.03, -1.53], [41.5, -1.75], [41.25, -1.65], [41.0, -1.75], [40.47, -1.53], [40.32, -1.18], [39.97, -1.03], [39.82, -0.68], [39.47, -0.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.75, -0.5], [40.96, -0.0], [40.75, 0.5], [40.85, 0.75], [40.75, 1.0], [40.97, 1.53], [41.5, 1.75], [41.75, 1.65], [41.82, 1.68], [41.97, 2.03], [42.5, 2.25], [42.75, 2.15], [43.0, 2.25], [43.53, 2.03], [43.68, 1.68], [44.03, 1.53], [44.25, 1.0], [44.03, 0.47], [43.5, 0.25], [43.25, 0.35], [43.0, 0.25], [42.75, 0.35], [42.68, 0.32], [42.65, 0.25], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.18, -1.18], [42.03, -1.53], [41.5, -1.75], [40.97, -1.53], [40.75, -1.0], [40.85, -0.75], [40.75, -0.5]]]]}, "2022-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.47, -0.53], [39.25, 0.0], [39.47, 0.53], [40.0, 0.75], [40.25, 0.65], [40.5, 0.75], [40.75, 0.65], [40.82, 0.68], [40.85, 0.75], [40.75, 1.0], [40.97, 1.53], [41.5, 1.75], [41.75, 1.65], [41.82, 1.68], [41.97, 2.03], [42.5, 2.25], [42.75, 2.15], [43.0, 2.25], [43.53, 2.03], [43.68, 1.68], [44.03, 1.53], [44.25, 1.0], [44.03, 0.47], [43.5, 0.25], [43.25, 0.35], [43.0, 0.25], [42.75, 0.35], [42.68, 0.32], [42.65, 0.25], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.18, -1.18], [42.03, -1.53], [41.5, -1.75], [41.25, -1.65], [41.0, -1.75], [40.47, -1.53], [40.32, -1.18], [39.97, -1.03], [39.82, -0.68], [39.47, -0.53]]]]}, "2022-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.47, -0.53], [39.25, 0.0], [39.47, 0.53], [40.0, 0.75], [40.25, 0.65], [40.5, 0.75], [40.75, 0.65], [40.82, 0.68], [40.85, 0.75], [40.75, 1.0], [40.97, 1.53], [41.5, 1.75], [41.75, 1.65], [41.82, 1.68], [41.97, 2.03], [42.5, 2.25], [42.75, 2.15], [43.0, 2.25], [43.53, 2.03], [43.68, 1.68], [44.03, 1.53], [44.25, 1.0], [44.03, 0.47], [43.5, 0.25], [43.25, 0.35], [43.0, 0.25], [42.75, 0.35], [42.68, 0.32], [42.65, 0.25], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.18, -1.18], [42.03, -1.53], [41.5, -1.75], [41.25, -1.65], [41.0, -1.75], [40.47, -1.53], [40.32, -1.18], [39.97, -1.03], [39.82, -0.68], [39.47, -0.53]]]]}, "2022-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.47, -0.53], [39.25, 0.0], [39.47, 0.53], [40.0, 0.75], [40.25, 0.65], [40.5, 0.75], [40.75, 0.65], [40.82, 0.68], [40.97, 1.03], [41.32, 1.18], [41.47, 1.53], [42.0, 1.75], [42.25, 1.65], [42.5, 1.75], [43.03, 1.53], [43.25, 1.0], [43.03, 0.47], [42.68, 0.32], [42.65, 0.25], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.18, -1.18], [42.03, -1.53], [41.5, -1.75], [41.25, -1.65], [41.0, -1.75], [40.47, -1.53], [40.32, -1.18], [39.97, -1.03], [39.82, -0.68], [39.47, -0.53]]]]}, "2022-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, -1.25], [39.97, -1.03], [39.75, -0.5], [39.97, 0.03], [40.5, 0.25], [41.03, 0.03], [41.25, -0.5], [41.03, -1.03], [40.5, -1.25]]], [[[41.25, 0.0], [41.46, 0.5], [41.25, 1.0], [41.47, 1.53], [42.0, 1.75], [42.25, 1.65], [42.5, 1.75], [43.03, 1.53], [43.25, 1.0], [43.03, 0.47], [42.63, 0.3], [42.75, 0.0], [42.65, -0.25], [42.75, -0.5], [42.53, -1.03], [42.0, -1.25], [41.47, -1.03], [41.25, -0.5], [41.35, -0.25], [41.25, 0.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8654547333177334}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7497979977729357}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.603497130692006, 26.200120149839393, 26.26291887654571, 26.454752329983762, 26.640074012517005]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.293594293634726, 25.34671752584353, 25.59738592629492, 25.936725705082267, 26.4411444945153]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4627610235121087, -1.9692451662225323, -1.8506626848471739, -1.700261530081817, -1.3634561118291004]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.78464298327998, -2.8654547333177334, -2.433750897822449, -2.0573306237587303, -1.605565483969258]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5883450910956065, -1.9766667678726892, -1.8794117646252004, -1.7049680668292881, -1.477513125896025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.843197598020295, -2.7252351463012783, -2.6986629743283452, -2.0694330818983007, -1.679124193914601]}}