{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:11.900286", "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-May-19_to_2022-May-21_90.5_26.0"}, "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": 2022050000748}, "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": "May 19 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2022"}, "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": 55504.56020875611}, "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": ["Bangladesh", "India", "Nepal"]}, "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": 26.0}, "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": 90.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "90.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 88.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 92.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[88.0, 27.25], [88.25, 27.15], [88.5, 27.25], [88.75, 27.15], [89.0, 27.25], [89.25, 27.15], [89.5, 27.25], [89.75, 27.15], [90.0, 27.25], [90.53, 27.03], [90.68, 26.68], [90.75, 26.65], [90.82, 26.68], [90.97, 27.03], [91.5, 27.25], [91.75, 27.15], [92.0, 27.25], [92.25, 27.15], [92.5, 27.25], [93.03, 27.03], [93.25, 26.5], [93.03, 25.97], [92.68, 25.82], [92.53, 25.47], [92.0, 25.25], [91.75, 25.35], [91.5, 25.25], [91.25, 25.35], [91.0, 25.25], [90.75, 25.35], [90.68, 25.32], [90.53, 24.97], [90.0, 24.75], [89.75, 24.85], [89.5, 24.75], [89.25, 24.85], [89.0, 24.75], [88.47, 24.97], [88.32, 25.32], [88.25, 25.35], [88.0, 25.25], [87.47, 25.47], [87.25, 26.0], [87.35, 26.25], [87.25, 26.5], [87.47, 27.03], [88.0, 27.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 26.5], [87.47, 27.03], [88.0, 27.25], [88.25, 27.15], [88.5, 27.25], [88.75, 27.15], [89.0, 27.25], [89.25, 27.15], [89.5, 27.25], [89.75, 27.15], [90.0, 27.25], [90.53, 27.03], [90.68, 26.68], [90.75, 26.65], [90.82, 26.68], [90.97, 27.03], [91.5, 27.25], [91.75, 27.15], [92.0, 27.25], [92.25, 27.15], [92.5, 27.25], [93.03, 27.03], [93.25, 26.5], [93.03, 25.97], [92.68, 25.82], [92.53, 25.47], [92.0, 25.25], [91.75, 25.35], [91.5, 25.25], [91.25, 25.35], [91.0, 25.25], [90.75, 25.35], [90.68, 25.32], [90.53, 24.97], [90.0, 24.75], [89.75, 24.85], [89.5, 24.75], [89.25, 24.85], [89.0, 24.75], [88.47, 24.97], [88.32, 25.32], [88.25, 25.35], [88.0, 25.25], [87.47, 25.47], [87.25, 26.0], [87.35, 26.25], [87.25, 26.5]]]]}, "2022-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 26.5], [87.47, 27.03], [88.0, 27.25], [88.25, 27.15], [88.5, 27.25], [88.75, 27.15], [89.0, 27.25], [89.25, 27.15], [89.5, 27.25], [89.75, 27.15], [90.0, 27.25], [90.53, 27.03], [90.68, 26.68], [90.75, 26.65], [90.82, 26.68], [90.97, 27.03], [91.5, 27.25], [91.75, 27.15], [92.0, 27.25], [92.25, 27.15], [92.5, 27.25], [93.03, 27.03], [93.25, 26.5], [93.03, 25.97], [92.68, 25.82], [92.53, 25.47], [92.0, 25.25], [91.75, 25.35], [91.5, 25.25], [91.25, 25.35], [91.0, 25.25], [90.75, 25.35], [90.68, 25.32], [90.53, 24.97], [90.0, 24.75], [89.75, 24.85], [89.5, 24.75], [89.25, 24.85], [89.0, 24.75], [88.47, 24.97], [88.32, 25.32], [88.25, 25.35], [88.0, 25.25], [87.47, 25.47], [87.25, 26.0], [87.35, 26.25], [87.25, 26.5]]]]}, "2022-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 26.5], [87.47, 27.03], [88.0, 27.25], [88.25, 27.15], [88.5, 27.25], [88.75, 27.15], [89.0, 27.25], [89.25, 27.15], [89.5, 27.25], [89.75, 27.15], [90.0, 27.25], [90.53, 27.03], [90.68, 26.68], [90.75, 26.65], [90.82, 26.68], [90.97, 27.03], [91.5, 27.25], [91.75, 27.15], [92.0, 27.25], [92.25, 27.15], [92.5, 27.25], [93.03, 27.03], [93.25, 26.5], [93.03, 25.97], [92.68, 25.82], [92.53, 25.47], [92.0, 25.25], [91.75, 25.35], [91.5, 25.25], [91.25, 25.35], [91.0, 25.25], [90.75, 25.35], [90.68, 25.32], [90.53, 24.97], [90.0, 24.75], [89.75, 24.85], [89.5, 24.75], [89.25, 24.85], [89.0, 24.75], [88.47, 24.97], [88.32, 25.32], [88.25, 25.35], [88.0, 25.25], [87.47, 25.47], [87.25, 26.0], [87.35, 26.25], [87.25, 26.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.845035690430734}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9951512864216094}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.390880743244907, 24.678133716364698, 24.483887117102654]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.35855658497337, 23.473509185587147, 23.482907825888844]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.090561318811558, -2.840497743363014, -3.0543947970902563]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7722974280266612, -3.2025818931959407, -3.845035690430734]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6808303898948136, -1.5441586365737723, -1.6945511655149967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1080049783958024, -1.713373636732088, -2.1960875301428966]}}