{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:41.318849", "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": "2018-Dec-16_to_2018-Dec-19_75.0_17.0"}, "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": 2018120000551}, "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 16 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 19 2018"}, "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": 68274.66402633763}, "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": 17.0}, "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": 73.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 76.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.0, 17.75], [75.53, 17.53], [75.75, 17.0], [75.53, 16.47], [75.0, 16.25], [74.47, 16.47], [74.25, 17.0], [74.47, 17.53], [75.0, 17.75]]]]}, "2018-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 17.03], [73.88, 17.2], [73.82, 17.32], [73.47, 17.47], [73.25, 18.0], [73.47, 18.53], [74.0, 18.75], [74.53, 18.53], [74.68, 18.18], [75.03, 18.03], [75.18, 17.68], [75.25, 17.65], [75.5, 17.75], [75.75, 17.65], [76.0, 17.75], [76.53, 17.53], [76.75, 17.0], [76.65, 16.75], [76.68, 16.68], [77.03, 16.53], [77.25, 16.0], [77.15, 15.75], [77.25, 15.5], [77.15, 15.25], [77.25, 15.0], [77.03, 14.47], [76.5, 14.25], [76.25, 14.35], [76.0, 14.25], [75.5, 14.46], [75.0, 14.25], [74.47, 14.47], [74.25, 15.0], [74.35, 15.25], [74.32, 15.32], [74.25, 15.35], [74.0, 15.25], [73.47, 15.47], [73.25, 16.0], [73.35, 16.25], [73.25, 16.5], [73.47, 17.03]]]]}, "2018-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 17.03], [73.88, 17.2], [73.82, 17.32], [73.47, 17.47], [73.25, 18.0], [73.47, 18.53], [74.0, 18.75], [74.53, 18.53], [74.68, 18.18], [75.03, 18.03], [75.18, 17.68], [75.25, 17.65], [75.5, 17.75], [75.75, 17.65], [76.0, 17.75], [76.53, 17.53], [76.75, 17.0], [76.65, 16.75], [76.68, 16.68], [77.03, 16.53], [77.25, 16.0], [77.15, 15.75], [77.25, 15.5], [77.15, 15.25], [77.25, 15.0], [77.03, 14.47], [76.5, 14.25], [76.25, 14.35], [76.0, 14.25], [75.5, 14.46], [75.0, 14.25], [74.47, 14.47], [74.25, 15.0], [74.35, 15.25], [74.32, 15.32], [74.25, 15.35], [74.0, 15.25], [73.47, 15.47], [73.25, 16.0], [73.35, 16.25], [73.25, 16.5], [73.47, 17.03]]]]}, "2018-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 17.03], [73.88, 17.2], [73.82, 17.32], [73.47, 17.47], [73.25, 18.0], [73.47, 18.53], [74.0, 18.75], [74.53, 18.53], [74.68, 18.18], [75.03, 18.03], [75.18, 17.68], [75.25, 17.65], [75.5, 17.75], [75.75, 17.65], [76.0, 17.75], [76.53, 17.53], [76.75, 17.0], [76.65, 16.75], [76.68, 16.68], [77.03, 16.53], [77.25, 16.0], [77.15, 15.75], [77.25, 15.5], [77.15, 15.25], [77.25, 15.0], [77.03, 14.47], [76.5, 14.25], [76.25, 14.35], [76.0, 14.25], [75.5, 14.46], [75.0, 14.25], [74.47, 14.47], [74.25, 15.0], [74.35, 15.25], [74.32, 15.32], [74.25, 15.35], [74.0, 15.25], [73.47, 15.47], [73.25, 16.0], [73.35, 16.25], [73.25, 16.5], [73.47, 17.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.669529578248273}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2725152681140943}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.94334641733502, 20.6808491229109, 20.296473301695926, 20.301996866409695]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.94334641733502, 18.109885689675764, 18.130968088615703, 17.057408527011546]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0385746262584235, -2.090494999515326, -2.4063795207160568, -2.3308426163654947]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0385746262584235, -2.648064109626489, -3.669529578248273, -3.3372971188840665]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3474471571435251, -1.5710904971710553, -1.8012637627043557, -1.7172548890117072]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3474471571435251, -2.179792164255458, -2.2844376967343223, -2.3168351995815857]}}