{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:38.763984", "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": "2017-Apr-16_to_2017-Apr-19_42.5_14.5"}, "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": 2017040000475}, "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 16 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 19 2017"}, "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": 65657.52701773903}, "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": ["Yemen"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula", "N.Eastern-Africa", "Sahara"]}, "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": ["Red 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": 14.5}, "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": 42.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.85, 15.25], [40.75, 15.5], [40.97, 16.03], [41.5, 16.25], [41.75, 16.15], [42.0, 16.25], [42.25, 16.15], [42.5, 16.25], [43.03, 16.03], [43.25, 15.5], [43.15, 15.25], [43.25, 15.0], [43.15, 14.75], [43.18, 14.68], [43.53, 14.53], [43.75, 14.0], [43.65, 13.75], [43.75, 13.5], [43.53, 12.97], [43.0, 12.75], [42.75, 12.85], [42.5, 12.75], [41.97, 12.97], [41.82, 13.32], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.75, 14.5], [40.85, 14.75], [40.75, 15.0], [40.85, 15.25]]]]}, "2017-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.35, 15.75], [40.25, 16.0], [40.47, 16.53], [40.82, 16.68], [40.97, 17.03], [41.5, 17.25], [41.75, 17.15], [42.0, 17.25], [42.53, 17.03], [42.68, 16.68], [43.03, 16.53], [43.25, 16.0], [43.15, 15.75], [43.25, 15.5], [43.15, 15.25], [43.25, 15.0], [43.15, 14.75], [43.18, 14.68], [43.53, 14.53], [43.75, 14.0], [43.65, 13.75], [43.75, 13.5], [43.53, 12.97], [43.0, 12.75], [42.75, 12.85], [42.5, 12.75], [41.97, 12.97], [41.82, 13.32], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.82, 14.32], [40.47, 14.47], [40.25, 15.0], [40.35, 15.25], [40.25, 15.5], [40.35, 15.75]]]]}, "2017-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.35, 15.75], [40.25, 16.0], [40.47, 16.53], [40.82, 16.68], [40.97, 17.03], [41.5, 17.25], [41.75, 17.15], [42.0, 17.25], [42.53, 17.03], [42.68, 16.68], [43.03, 16.53], [43.25, 16.0], [43.15, 15.75], [43.25, 15.5], [43.15, 15.25], [43.25, 15.0], [43.15, 14.75], [43.18, 14.68], [43.53, 14.53], [43.75, 14.0], [43.65, 13.75], [43.75, 13.5], [43.53, 12.97], [43.0, 12.75], [42.75, 12.85], [42.5, 12.75], [41.97, 12.97], [41.82, 13.32], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.82, 14.32], [40.47, 14.47], [40.25, 15.0], [40.35, 15.25], [40.25, 15.5], [40.35, 15.75]]]]}, "2017-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.35, 15.75], [40.25, 16.0], [40.47, 16.53], [40.82, 16.68], [40.97, 17.03], [41.5, 17.25], [41.75, 17.15], [42.0, 17.25], [42.53, 17.03], [42.68, 16.68], [43.03, 16.53], [43.25, 16.0], [43.15, 15.75], [43.25, 15.5], [43.15, 15.25], [43.25, 15.0], [43.15, 14.75], [43.18, 14.68], [43.53, 14.53], [43.75, 14.0], [43.53, 13.47], [43.0, 13.25], [42.47, 13.47], [42.32, 13.82], [42.25, 13.85], [42.0, 13.75], [41.75, 13.85], [41.5, 13.75], [40.97, 13.97], [40.82, 14.32], [40.47, 14.47], [40.25, 15.0], [40.35, 15.25], [40.25, 15.5], [40.35, 15.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.31023991168297}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4818043755977164}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.717215320203195, 26.610923707394477, 26.855999345186035, 27.090241894662768]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.543617849616908, 26.239129717954313, 26.46217301273606, 26.7943634698683]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3939340236558166, -1.6263079736604207, -1.501966884944698, -1.3488894069406885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9278633706609867, -2.31023991168297, -2.127230193199239, -1.74547190706636]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6137509990313803, -1.949642730594209, -1.8302003232143171, -1.695939807927072]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7580616047148345, -2.374295608558415, -2.1546381154202554, -1.86467213391719]}}