{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:05.537033", "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-Dec-09_to_2022-Dec-13_75.0_12.0"}, "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": 2022120000518}, "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": "December 09 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 13 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": 63295.61943912222}, "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": ["Arabian Sea", "Laccadive Sea"]}, "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": 12.0}, "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": 75.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 75.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[73.0, 14.75], [73.25, 14.65], [73.5, 14.75], [73.75, 14.65], [74.0, 14.75], [74.5, 14.54], [75.0, 14.75], [75.53, 14.53], [75.68, 14.18], [76.03, 14.03], [76.25, 13.5], [76.15, 13.25], [76.25, 13.0], [76.15, 12.75], [76.25, 12.5], [76.03, 11.97], [75.68, 11.82], [75.65, 11.75], [75.75, 11.5], [75.53, 10.97], [75.18, 10.82], [75.03, 10.47], [74.5, 10.25], [73.97, 10.47], [73.75, 11.0], [73.85, 11.25], [73.82, 11.32], [73.47, 11.47], [73.25, 12.0], [73.35, 12.25], [73.32, 12.32], [72.97, 12.47], [72.75, 13.0], [72.85, 13.25], [72.82, 13.32], [72.47, 13.47], [72.25, 14.0], [72.47, 14.53], [73.0, 14.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia", "Arabian-Sea"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.75, 13.0], [74.85, 13.25], [74.75, 13.5], [74.97, 14.03], [75.5, 14.25], [76.03, 14.03], [76.25, 13.5], [76.15, 13.25], [76.25, 13.0], [76.15, 12.75], [76.25, 12.5], [76.03, 11.97], [75.5, 11.75], [74.97, 11.97], [74.75, 12.5], [74.85, 12.75], [74.75, 13.0]]]]}, "2022-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 13.47], [74.25, 14.0], [74.47, 14.53], [75.0, 14.75], [75.53, 14.53], [75.68, 14.18], [76.03, 14.03], [76.25, 13.5], [76.15, 13.25], [76.25, 13.0], [76.15, 12.75], [76.25, 12.5], [76.03, 11.97], [75.5, 11.75], [74.97, 11.97], [74.75, 12.5], [74.85, 12.75], [74.75, 13.0], [74.85, 13.25], [74.82, 13.32], [74.47, 13.47]]]]}, "2022-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.47, 13.47], [72.25, 14.0], [72.47, 14.53], [73.0, 14.75], [73.25, 14.65], [73.5, 14.75], [73.75, 14.65], [74.0, 14.75], [74.5, 14.54], [75.0, 14.75], [75.53, 14.53], [75.68, 14.18], [76.03, 14.03], [76.25, 13.5], [76.15, 13.25], [76.25, 13.0], [76.15, 12.75], [76.25, 12.5], [76.03, 11.97], [75.68, 11.82], [75.65, 11.75], [75.75, 11.5], [75.53, 10.97], [75.18, 10.82], [75.03, 10.47], [74.5, 10.25], [73.97, 10.47], [73.75, 11.0], [73.85, 11.25], [73.82, 11.32], [73.47, 11.47], [73.25, 12.0], [73.35, 12.25], [73.32, 12.32], [72.97, 12.47], [72.75, 13.0], [72.85, 13.25], [72.82, 13.32], [72.47, 13.47]]]]}, "2022-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.47, 13.47], [72.25, 14.0], [72.47, 14.53], [73.0, 14.75], [73.25, 14.65], [73.5, 14.75], [73.75, 14.65], [74.0, 14.75], [74.5, 14.54], [75.0, 14.75], [75.53, 14.53], [75.75, 14.0], [75.63, 13.7], [76.03, 13.53], [76.25, 13.0], [76.15, 12.75], [76.25, 12.5], [76.03, 11.97], [75.68, 11.82], [75.65, 11.75], [75.75, 11.5], [75.53, 10.97], [75.18, 10.82], [75.03, 10.47], [74.5, 10.25], [73.97, 10.47], [73.75, 11.0], [73.85, 11.25], [73.82, 11.32], [73.47, 11.47], [73.25, 12.0], [73.35, 12.25], [73.32, 12.32], [72.97, 12.47], [72.75, 13.0], [72.85, 13.25], [72.82, 13.32], [72.47, 13.47]]]]}, "2022-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.47, 13.47], [72.25, 14.0], [72.47, 14.53], [73.0, 14.75], [73.25, 14.65], [73.5, 14.75], [73.75, 14.65], [74.0, 14.75], [74.53, 14.53], [74.75, 14.0], [74.65, 13.75], [74.68, 13.68], [75.03, 13.53], [75.18, 13.18], [75.53, 13.03], [75.75, 12.5], [75.65, 12.25], [75.75, 12.0], [75.65, 11.75], [75.75, 11.5], [75.53, 10.97], [75.18, 10.82], [75.03, 10.47], [74.5, 10.25], [73.97, 10.47], [73.75, 11.0], [73.85, 11.25], [73.82, 11.32], [73.47, 11.47], [73.25, 12.0], [73.35, 12.25], [73.32, 12.32], [72.97, 12.47], [72.75, 13.0], [72.85, 13.25], [72.82, 13.32], [72.47, 13.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8748821144771455}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5050473998497225}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.78488941242398, 20.743076941348818, 24.86888694695284, 25.250801618146113, 26.186968714462694]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.744530442351163, 18.88092265943436, 19.57317006532577, 21.28037224854978, 25.500096263377827]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.786788551447349, -2.0677468237915235, -1.6413823085324484, -1.501619944164807, -1.1585470987203688]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.007531777138581, -2.4089832412956866, -2.8748821144771455, -1.794829637058399, -1.5577498352637917]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5816240696629167, -1.8102831713917595, -2.3139757311794398, -2.2642417554600067, -1.9493772770427042]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7420796692608072, -2.0183645655462588, -2.9884966419143457, -2.8878747745912374, -2.546983328129195]}}