{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:22.798411", "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": "2024-Apr-21_to_2024-Apr-28_77.5_20.5"}, "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": 2024040000453}, "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 21 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 66667.05430746768}, "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": ["India"]}, "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": 20.5}, "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": 77.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 76.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[75.35, 19.75], [75.25, 20.0], [75.47, 20.53], [75.82, 20.68], [75.97, 21.03], [76.32, 21.18], [76.47, 21.53], [76.82, 21.68], [76.97, 22.03], [77.5, 22.25], [77.75, 22.15], [77.82, 22.18], [77.85, 22.25], [77.75, 22.5], [77.97, 23.03], [78.5, 23.25], [79.03, 23.03], [79.25, 22.5], [79.15, 22.25], [79.25, 22.0], [79.03, 21.47], [78.68, 21.32], [78.65, 21.25], [78.68, 21.18], [79.03, 21.03], [79.25, 20.5], [79.03, 19.97], [78.68, 19.82], [78.53, 19.47], [78.18, 19.32], [78.03, 18.97], [77.68, 18.82], [77.53, 18.47], [77.18, 18.32], [77.03, 17.97], [76.5, 17.75], [75.97, 17.97], [75.82, 18.32], [75.47, 18.47], [75.25, 19.0], [75.35, 19.25], [75.25, 19.5], [75.35, 19.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.47, 18.47], [75.25, 19.0], [75.47, 19.53], [76.0, 19.75], [76.25, 19.65], [76.5, 19.75], [77.03, 19.53], [77.25, 19.0], [77.15, 18.75], [77.25, 18.5], [77.03, 17.97], [76.5, 17.75], [75.97, 17.97], [75.82, 18.32], [75.47, 18.47]]]]}, "2024-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.25, 19.5], [75.35, 19.75], [75.25, 20.0], [75.47, 20.53], [75.82, 20.68], [75.97, 21.03], [76.32, 21.18], [76.47, 21.53], [76.82, 21.68], [76.97, 22.03], [77.5, 22.25], [77.75, 22.15], [77.82, 22.18], [77.85, 22.25], [77.75, 22.5], [77.97, 23.03], [78.5, 23.25], [79.03, 23.03], [79.25, 22.5], [79.15, 22.25], [79.25, 22.0], [79.03, 21.47], [78.68, 21.32], [78.65, 21.25], [78.68, 21.18], [79.03, 21.03], [79.25, 20.5], [79.03, 19.97], [78.68, 19.82], [78.53, 19.47], [78.18, 19.32], [78.03, 18.97], [77.68, 18.82], [77.53, 18.47], [77.18, 18.32], [77.03, 17.97], [76.5, 17.75], [75.97, 17.97], [75.82, 18.32], [75.47, 18.47], [75.25, 19.0], [75.35, 19.25], [75.25, 19.5]]]]}, "2024-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.25, 19.5], [75.35, 19.75], [75.25, 20.0], 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20.5], [76.97, 21.03]]]]}, "2024-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.97, 21.03], [77.5, 21.25], [78.03, 21.03], [78.25, 20.5], [78.03, 19.97], [77.5, 19.75], [76.97, 19.97], [76.75, 20.5], [76.97, 21.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.116151860201796}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8187442145569257}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.18464563684762, 29.417762702924847, 30.08756706004442, 30.906540206799832, 32.76526469876109, 32.82165164968177, 33.11355099869775, 33.22434779847322]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.379516952873473, 25.26983351451986, 27.063223256496315, 28.53466169805432, 32.76526469876109, 32.82165164968177, 33.11355099869775, 33.22434779847322]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.334285516755017, -3.4099845376694367, -2.9199866702391866, -2.3280718570471803, -1.7440043425964404, -1.8583645455125861, -1.7417895684272935, -1.7612100905220132]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5797431555785124, -5.116151860201796, -3.6444877123116726, -3.3874625122867883, -1.7440043425964404, -1.8583645455125861, -1.7417895684272935, -1.7612100905220132]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.557245529470448, -2.2996734368071854, -2.068274767305929, -1.6619279596526677, -1.248696463072309, -1.2411206462091005, 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