{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:01.191892", "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-Aug-09_to_2020-Aug-12_55.0_-20.5"}, "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": 2020080000366}, "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": "August 09 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 12 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": 86664.48216855177}, "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": ["R\u00e9union"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Indian-Ocean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Indian Ocean"]}, "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": -20.5}, "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": 55.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "55.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 56.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -20.47], [52.82, -20.32], [52.97, -19.97], [53.32, -19.82], [53.47, -19.47], [54.0, -19.25], [54.25, -19.35], [54.32, -19.32], [54.47, -18.97], [55.0, -18.75], [55.53, -18.97], [55.68, -19.32], [56.0, -19.46], [56.5, -19.25], [57.03, -19.47], [57.25, -20.0], [57.15, -20.25], [57.25, -20.5], [57.15, -20.75], [57.25, -21.0], [57.15, -21.25], [57.25, -21.5], [57.03, -22.03], [56.5, -22.25], [56.25, -22.15], [56.18, -22.18], [56.03, -22.53], [55.5, -22.75], [54.97, -22.53], [54.82, -22.18], [54.75, -22.15], [54.5, -22.25], [54.25, -22.15], [54.0, -22.25], [53.75, -22.15], [53.5, -22.25], [53.25, -22.15], [53.0, -22.25], [52.47, -22.03], [52.25, -21.5], [52.35, -21.25], [52.25, -21.0], [52.47, -20.47]]]]}, "2020-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -20.47], [52.82, -20.32], [52.97, -19.97], [53.32, -19.82], [53.47, -19.47], [54.0, -19.25], [54.25, -19.35], [54.32, -19.32], [54.47, -18.97], [55.0, -18.75], [55.53, -18.97], [55.68, -19.32], [56.0, -19.46], [56.5, -19.25], [57.03, -19.47], [57.25, -20.0], [57.15, -20.25], [57.25, -20.5], [57.15, -20.75], [57.25, -21.0], [57.15, -21.25], [57.25, -21.5], [57.03, -22.03], [56.5, -22.25], [56.25, -22.15], [56.18, -22.18], [56.03, -22.53], [55.5, -22.75], [54.97, -22.53], [54.82, -22.18], [54.75, -22.15], [54.5, -22.25], [54.25, -22.15], [54.0, -22.25], [53.75, -22.15], [53.5, -22.25], [53.25, -22.15], [53.0, -22.25], [52.47, -22.03], [52.25, -21.5], [52.35, -21.25], [52.25, -21.0], [52.47, -20.47]]]]}, "2020-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -20.47], [52.82, -20.32], [52.97, -19.97], [53.32, -19.82], [53.47, -19.47], [54.0, -19.25], [54.25, -19.35], [54.32, -19.32], [54.47, -18.97], [55.0, -18.75], [55.53, -18.97], [55.68, -19.32], [56.0, -19.46], [56.5, -19.25], [57.03, -19.47], [57.25, -20.0], [57.15, -20.25], [57.25, -20.5], [57.15, -20.75], [57.25, -21.0], [57.15, -21.25], [57.25, -21.5], [57.03, -22.03], [56.5, -22.25], [56.25, -22.15], [56.18, -22.18], [56.03, -22.53], [55.5, -22.75], [54.97, -22.53], [54.82, -22.18], [54.75, -22.15], [54.5, -22.25], [54.25, -22.15], [54.0, -22.25], [53.75, -22.15], [53.5, -22.25], [53.25, -22.15], [53.0, -22.25], [52.47, -22.03], [52.25, -21.5], [52.35, -21.25], [52.25, -21.0], [52.47, -20.47]]]]}, "2020-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, -18.97], [55.0, -18.75], [55.53, -18.97], [55.68, -19.32], [56.0, -19.46], [56.5, -19.25], [57.03, -19.47], [57.25, -20.0], [57.03, -20.53], [56.5, -20.75], [56.0, -20.54], [55.68, -20.68], [55.53, -21.03], [55.0, -21.25], [54.47, -21.03], [54.25, -20.5], [54.46, -20.0], [54.25, -19.5], [54.47, -18.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1192129431328794}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2182528807083062}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.41537448616708, 20.473988245716782, 20.762172793588377, 21.442872669495785]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.61152399501526, 16.15214497038437, 16.42291850653993, 21.172264794726743]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3650779332002894, -1.3165704545197647, -1.0347210745379263, -0.7561717297103456]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1192129431328794, -1.99242065994855, -1.7433390516159193, -0.7706164829102704]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1033963012958594, -2.0605147866813613, -1.6108170208271726, -1.2811944291752484]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.557249816806856, -2.5802261283546497, -2.0687604456352156, -1.3204077125748874]}}