{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:15.820608", "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-Oct-13_to_2018-Oct-18_57.0_36.5"}, "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": 2018100000471}, "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": "October 13 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 18 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 59388.202030844586}, "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": ["Iran", "Turkmenistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.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": 36.5}, "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": 57.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "57.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 55.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 59.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[57.47, 38.03], [58.0, 38.25], [58.53, 38.03], [58.75, 37.5], [58.53, 36.97], [58.0, 36.75], [57.57, 36.93], [57.75, 36.5], [57.53, 35.97], [57.0, 35.75], [56.47, 35.97], [56.25, 36.5], [56.47, 37.03], [57.0, 37.25], [57.43, 37.07], [57.25, 37.5], [57.47, 38.03]]]]}, "2018-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[57.47, 38.03], [58.0, 38.25], [58.53, 38.03], [58.75, 37.5], [58.53, 36.97], [58.0, 36.75], [57.57, 36.93], [57.75, 36.5], [57.53, 35.97], [57.0, 35.75], [56.47, 35.97], [56.25, 36.5], [56.47, 37.03], [57.0, 37.25], [57.43, 37.07], [57.25, 37.5], [57.47, 38.03]]]]}, "2018-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[56.25, 38.0], [56.47, 38.53], [57.0, 38.75], [57.53, 38.53], [57.7, 38.13], [58.0, 38.25], [58.53, 38.03], [58.75, 37.5], [58.53, 36.97], [58.0, 36.75], [57.57, 36.93], [57.75, 36.5], [57.53, 35.97], [57.0, 35.75], [56.47, 35.97], [56.25, 36.5], [56.47, 37.03], [57.0, 37.25], [56.47, 37.47], [56.25, 38.0]], [[57.43, 37.07], [57.3, 37.38], [57.0, 37.25], [57.43, 37.07]]]]}, "2018-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.35, 37.25], [55.25, 37.5], [55.35, 37.75], [55.25, 38.0], [55.47, 38.53], [56.0, 38.75], [56.5, 38.54], [57.0, 38.75], [57.25, 38.65], [57.5, 38.75], [58.03, 38.53], [58.18, 38.18], [58.53, 38.03], [58.7, 37.63], [59.0, 37.75], [59.53, 37.53], [59.75, 37.0], [59.53, 36.47], [59.18, 36.32], [59.03, 35.97], [58.63, 35.8], [58.75, 35.5], [58.53, 34.97], [58.0, 34.75], [57.75, 34.85], [57.5, 34.75], [57.25, 34.85], [57.0, 34.75], [56.47, 34.97], [56.25, 35.5], [56.35, 35.75], [56.32, 35.82], [56.25, 35.85], [56.0, 35.75], [55.47, 35.97], [55.25, 36.5], [55.35, 36.75], [55.25, 37.0], [55.35, 37.25]]]]}, "2018-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.35, 37.25], [55.25, 37.5], [55.35, 37.75], [55.25, 38.0], [55.47, 38.53], [56.0, 38.75], [56.5, 38.54], [57.0, 38.75], [57.25, 38.65], [57.5, 38.75], [58.03, 38.53], [58.18, 38.18], [58.53, 38.03], [58.7, 37.63], [59.0, 37.75], [59.53, 37.53], [59.75, 37.0], [59.53, 36.47], [59.18, 36.32], [59.03, 35.97], [58.63, 35.8], [58.75, 35.5], [58.53, 34.97], [58.0, 34.75], [57.75, 34.85], [57.5, 34.75], [57.25, 34.85], [57.0, 34.75], [56.47, 34.97], [56.25, 35.5], [56.35, 35.75], [56.32, 35.82], [56.25, 35.85], [56.0, 35.75], [55.47, 35.97], [55.25, 36.5], [55.35, 36.75], [55.25, 37.0], [55.35, 37.25]]]]}, "2018-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.35, 37.25], [55.25, 37.5], [55.35, 37.75], [55.25, 38.0], [55.47, 38.53], [56.0, 38.75], [56.5, 38.54], [57.0, 38.75], [57.25, 38.65], [57.5, 38.75], [58.03, 38.53], [58.18, 38.18], [58.53, 38.03], [58.7, 37.63], [59.0, 37.75], [59.53, 37.53], [59.75, 37.0], [59.53, 36.47], [59.18, 36.32], [59.03, 35.97], [58.63, 35.8], [58.75, 35.5], [58.53, 34.97], [58.0, 34.75], [57.75, 34.85], [57.5, 34.75], [57.25, 34.85], [57.0, 34.75], [56.47, 34.97], [56.25, 35.5], [56.35, 35.75], [56.32, 35.82], [56.25, 35.85], [56.0, 35.75], [55.47, 35.97], [55.25, 36.5], [55.35, 36.75], [55.25, 37.0], [55.35, 37.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.311015747761928}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.758606734882035}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.291731136185604, 10.703689927127186, 9.896608464413987, 10.536512525056139, 10.3481431474018, 10.555838579001659]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.669224157764177, 8.032326390678122, 7.724577793756225, 6.213805280384236, 5.75981736927605, 5.7944684517539145]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.640730153008462, -4.133231697899248, 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