{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:13.024395", "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": "2023-Sep-14_to_2023-Sep-17_76.0_21.5"}, "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": 2023090000314}, "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 14 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2023"}, "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": 54730.76340202829}, "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": 21.5}, "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": 76.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "76.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 74.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 78.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[77.5, 21.75], [77.75, 21.65], [78.0, 21.75], [78.53, 21.53], [78.75, 21.0], [78.53, 20.47], [78.0, 20.25], [77.75, 20.35], [77.5, 20.25], [77.25, 20.35], [77.0, 20.25], [76.5, 20.46], [76.0, 20.25], [75.75, 20.35], [75.5, 20.25], [75.25, 20.35], [75.18, 20.32], [75.03, 19.97], [74.5, 19.75], [74.25, 19.85], [74.0, 19.75], [73.47, 19.97], [73.25, 20.5], [73.35, 20.75], [73.25, 21.0], [73.35, 21.25], [73.25, 21.5], [73.47, 22.03], [74.0, 22.25], [74.25, 22.15], [74.5, 22.25], [74.75, 22.15], [74.82, 22.18], [74.97, 22.53], [75.5, 22.75], [75.75, 22.65], [76.0, 22.75], [76.25, 22.65], [76.5, 22.75], [77.03, 22.53], [77.25, 22.0], [77.15, 21.75], [77.18, 21.68], [77.25, 21.65], [77.5, 21.75]]]]}}, "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": {"2023-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.0, 20.25], [76.47, 20.47], [76.25, 21.0], [76.47, 21.53], [77.0, 21.75], [77.25, 21.65], [77.5, 21.75], [77.75, 21.65], [78.0, 21.75], [78.53, 21.53], [78.75, 21.0], [78.53, 20.47], [78.0, 20.25], [77.75, 20.35], [77.5, 20.25], [77.25, 20.35], [77.0, 20.25]]]]}, "2023-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, 21.0], [73.35, 21.25], [73.25, 21.5], [73.47, 22.03], [74.0, 22.25], [74.25, 22.15], [74.5, 22.25], [74.75, 22.15], [74.82, 22.18], [74.97, 22.53], [75.5, 22.75], [75.75, 22.65], [76.0, 22.75], [76.25, 22.65], [76.5, 22.75], [77.03, 22.53], [77.25, 22.0], [77.15, 21.75], [77.18, 21.68], [77.25, 21.65], [77.5, 21.75], [77.75, 21.65], [78.0, 21.75], [78.53, 21.53], [78.75, 21.0], [78.53, 20.47], [78.0, 20.25], [77.75, 20.35], [77.5, 20.25], [77.25, 20.35], [77.0, 20.25], [76.5, 20.46], [76.0, 20.25], [75.75, 20.35], [75.5, 20.25], [75.25, 20.35], [75.18, 20.32], [75.03, 19.97], [74.5, 19.75], [74.25, 19.85], [74.0, 19.75], [73.47, 19.97], [73.25, 20.5], [73.35, 20.75], [73.25, 21.0]]]]}, "2023-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, 21.0], [73.35, 21.25], [73.25, 21.5], [73.47, 22.03], [74.0, 22.25], [74.25, 22.15], [74.5, 22.25], [74.75, 22.15], [74.82, 22.18], [74.97, 22.53], [75.5, 22.75], [75.75, 22.65], [76.0, 22.75], [76.25, 22.65], [76.5, 22.75], [77.03, 22.53], [77.25, 22.0], [77.15, 21.75], [77.18, 21.68], [77.25, 21.65], [77.5, 21.75], [77.75, 21.65], [78.0, 21.75], [78.53, 21.53], [78.75, 21.0], [78.53, 20.47], [78.0, 20.25], [77.75, 20.35], [77.5, 20.25], [77.25, 20.35], [77.0, 20.25], [76.5, 20.46], [76.0, 20.25], [75.75, 20.35], [75.5, 20.25], [75.25, 20.35], [75.18, 20.32], [75.03, 19.97], [74.5, 19.75], [74.25, 19.85], [74.0, 19.75], [73.47, 19.97], [73.25, 20.5], [73.35, 20.75], [73.25, 21.0]]]]}, "2023-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, 21.0], [73.35, 21.25], [73.25, 21.5], [73.47, 22.03], [74.0, 22.25], [74.25, 22.15], [74.5, 22.25], [74.75, 22.15], [74.82, 22.18], [74.97, 22.53], [75.5, 22.75], [75.75, 22.65], [76.0, 22.75], [76.25, 22.65], [76.5, 22.75], [77.03, 22.53], [77.25, 22.0], [77.15, 21.75], [77.25, 21.5], [77.03, 20.97], [76.68, 20.82], [76.53, 20.47], [76.0, 20.25], [75.75, 20.35], [75.5, 20.25], [75.25, 20.35], [75.18, 20.32], [75.03, 19.97], [74.5, 19.75], [74.25, 19.85], [74.0, 19.75], [73.47, 19.97], [73.25, 20.5], [73.35, 20.75], [73.25, 21.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.505960709154863}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1212750064437067}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.39640283571447, 24.773625019712938, 23.885765375927235, 24.237936934878462]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.31821357392107, 22.23187315409706, 22.284519495283632, 22.512352491307638]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.420928106827186, -1.6977241371069365, -2.5947721676648143, -2.193278828509154]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4810455212818852, -1.972262179737811, -3.505960709154863, -3.1312306070294085]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4188525919738202, -1.670625206308438, -2.437073113736435, -1.9952704253895355]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.503137373301761, -2.199961170451062, -3.0575284842508426, -2.47115684558646]}}