{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:22.390820", "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": "2020-Sep-19_to_2020-Sep-22_75.5_14.0"}, "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": 2020090000491}, "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 19 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 22 2020"}, "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": 101859.72636170057}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "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": 14.0}, "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": 75.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 74.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 77.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 13.53], [75.0, 13.75], [75.25, 13.65], [75.5, 13.75], 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16.65], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.68, 16.18], [78.03, 16.03], [78.25, 15.5], [78.15, 15.25], [78.25, 15.0], [78.03, 14.47], [77.68, 14.32], [77.53, 13.97], [77.18, 13.82], [77.03, 13.47], [76.68, 13.32], [76.65, 13.25], [76.68, 13.18], [76.75, 13.15], [77.0, 13.25], [77.53, 13.03], [77.75, 12.5], [77.53, 11.97], [77.18, 11.82], [77.03, 11.47], [76.5, 11.25], [76.0, 11.46], [75.5, 11.25], [74.97, 11.47], [74.75, 12.0], [74.85, 12.25], [74.82, 12.32], [74.47, 12.47], [74.25, 13.0], [74.35, 13.25], [74.25, 13.5], [74.35, 13.75]]]]}, "2020-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.35, 13.75], [74.25, 14.0], [74.35, 14.25], [74.25, 14.5], [74.47, 15.03], [74.82, 15.18], [74.96, 15.5], [74.75, 16.0], [74.97, 16.53], [75.5, 16.75], [75.75, 16.65], [76.0, 16.75], [76.25, 16.65], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.68, 16.18], [78.03, 16.03], [78.25, 15.5], [78.15, 15.25], [78.25, 15.0], 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13.5], [74.35, 13.75], [74.25, 14.0], [74.35, 14.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.254295443473154}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5587167152087769}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.018607616508632, 23.196878789959214, 23.469569347923994, 22.91237171450888]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.333632373214584, 20.239875788860388, 20.7310953200963, 20.38907163477188]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5193661453789673, -1.666548174057741, -1.4147860335730547, -1.6449136816568015]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2272658879985556, -2.254295443473154, -1.9963611106033454, -1.9924526039693546]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5771708918537954, -1.999610735761346, -1.5977912755417985, -1.907066300047508]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3209383823445493, -3.2451168644341104, -2.1486711834954866, -2.731807101663225]}}