{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:17.424889", "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": "2021-Feb-25_to_2021-Feb-28_54.5_31.0"}, "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": 2021020000961}, "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": "February 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2021"}, "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": 211347.38097720788}, "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"]}, "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": 31.0}, "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": 54.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "54.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 58.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.85, 32.25], [51.75, 32.5], [51.97, 33.03], [52.5, 33.25], [52.75, 33.15], [53.0, 33.25], [53.25, 33.15], [53.5, 33.25], [52.97, 33.47], [52.75, 34.0], [52.85, 34.25], [52.75, 34.5], [52.97, 35.03], [53.5, 35.25], [53.75, 35.15], [54.0, 35.25], [54.5, 35.04], [55.0, 35.25], [55.25, 35.15], [55.5, 35.25], [55.75, 35.15], [55.82, 35.18], [55.97, 35.53], [56.5, 35.75], [56.75, 35.65], [57.0, 35.75], [57.53, 35.53], [57.68, 35.18], [58.03, 35.03], [58.25, 34.5], [58.15, 34.25], [58.25, 34.0], [58.03, 33.47], [57.68, 33.32], [57.65, 33.25], [57.68, 33.18], [57.75, 33.15], [58.0, 33.25], [58.53, 33.03], [58.75, 32.5], [58.65, 32.25], [58.75, 32.0], [58.65, 31.75], [58.75, 31.5], [58.53, 30.97], [58.18, 30.82], [58.15, 30.75], [58.25, 30.5], [58.03, 29.97], [57.5, 29.75], [56.97, 29.97], [56.82, 30.32], [56.75, 30.35], [56.68, 30.32], [56.53, 29.97], [56.0, 29.75], [55.75, 29.85], [55.5, 29.75], [55.25, 29.85], [55.0, 29.75], [54.75, 29.85], [54.5, 29.75], [54.25, 29.85], [54.0, 29.75], [53.47, 29.97], [53.32, 30.32], [53.25, 30.35], [53.0, 30.25], [52.47, 30.47], [52.32, 30.82], [51.97, 30.97], [51.75, 31.5], [51.85, 31.75], [51.75, 32.0], [51.85, 32.25]], [[53.75, 33.15], [53.82, 33.18], [53.85, 33.25], [53.82, 33.32], [53.75, 33.35], [53.5, 33.25], [53.75, 33.15]]]]}, "2021-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.85, 32.25], [51.75, 32.5], [51.97, 33.03], [52.5, 33.25], [52.75, 33.15], [53.0, 33.25], [53.25, 33.15], [53.5, 33.25], [52.97, 33.47], [52.75, 34.0], [52.85, 34.25], [52.75, 34.5], [52.97, 35.03], [53.5, 35.25], [53.75, 35.15], [54.0, 35.25], [54.5, 35.04], [55.0, 35.25], [55.25, 35.15], [55.5, 35.25], [55.75, 35.15], [55.82, 35.18], [55.97, 35.53], [56.5, 35.75], [56.75, 35.65], [57.0, 35.75], [57.53, 35.53], [57.68, 35.18], [58.03, 35.03], [58.25, 34.5], [58.15, 34.25], [58.25, 34.0], [58.03, 33.47], [57.68, 33.32], [57.65, 33.25], [57.68, 33.18], [57.75, 33.15], [58.0, 33.25], [58.53, 33.03], [58.75, 32.5], [58.65, 32.25], [58.75, 32.0], [58.65, 31.75], [58.68, 31.68], [59.03, 31.53], [59.25, 31.0], [59.03, 30.47], [58.5, 30.25], [58.25, 30.35], [58.18, 30.32], [58.03, 29.97], [57.5, 29.75], [56.97, 29.97], [56.82, 30.32], [56.75, 30.35], [56.68, 30.32], [56.53, 29.97], [56.0, 29.75], [55.75, 29.85], [55.5, 29.75], [55.25, 29.85], [55.0, 29.75], [54.75, 29.85], [54.5, 29.75], [54.25, 29.85], [54.0, 29.75], [53.47, 29.97], [53.32, 30.32], [53.25, 30.35], [53.0, 30.25], [52.47, 30.47], [52.32, 30.82], [51.97, 30.97], [51.75, 31.5], [51.85, 31.75], [51.75, 32.0], [51.85, 32.25]], [[53.75, 33.15], [53.82, 33.18], [53.85, 33.25], [53.82, 33.32], [53.75, 33.35], [53.5, 33.25], [53.75, 33.15]]]]}, "2021-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.85, 32.25], [51.75, 32.5], [51.97, 33.03], [52.5, 33.25], [52.75, 33.15], [53.0, 33.25], [53.25, 33.15], [53.5, 33.25], [52.97, 33.47], [52.75, 34.0], [52.85, 34.25], [52.75, 34.5], [52.97, 35.03], [53.5, 35.25], [53.75, 35.15], [54.0, 35.25], [54.5, 35.04], [55.0, 35.25], [55.25, 35.15], [55.5, 35.25], [55.75, 35.15], [55.82, 35.18], [55.97, 35.53], [56.5, 35.75], [56.75, 35.65], [57.0, 35.75], [57.53, 35.53], [57.68, 35.18], [58.03, 35.03], [58.25, 34.5], [58.15, 34.25], [58.25, 34.0], [58.03, 33.47], [57.68, 33.32], [57.65, 33.25], [57.68, 33.18], [57.75, 33.15], [58.0, 33.25], [58.53, 33.03], [58.75, 32.5], [58.65, 32.25], [58.75, 32.0], [58.65, 31.75], [58.68, 31.68], [59.03, 31.53], [59.25, 31.0], [59.03, 30.47], [58.5, 30.25], [58.25, 30.35], [58.18, 30.32], [58.03, 29.97], [57.5, 29.75], [56.97, 29.97], [56.82, 30.32], [56.75, 30.35], [56.68, 30.32], [56.53, 29.97], [56.0, 29.75], [55.75, 29.85], [55.5, 29.75], [55.25, 29.85], [55.0, 29.75], [54.75, 29.85], [54.5, 29.75], [54.25, 29.85], [54.0, 29.75], [53.47, 29.97], [53.32, 30.32], [53.25, 30.35], [53.0, 30.25], [52.47, 30.47], [52.32, 30.82], [51.97, 30.97], [51.75, 31.5], [51.85, 31.75], [51.75, 32.0], [51.85, 32.25]], [[53.75, 33.15], [53.82, 33.18], [53.85, 33.25], [53.82, 33.32], [53.75, 33.35], [53.5, 33.25], [53.75, 33.15]]]]}, "2021-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[57.47, 30.47], [57.25, 31.0], [57.47, 31.53], [58.0, 31.75], [58.25, 31.65], [58.5, 31.75], [59.03, 31.53], [59.25, 31.0], [59.03, 30.47], [58.5, 30.25], [58.25, 30.35], [58.0, 30.25], [57.47, 30.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.568005564374744}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.28635251136913}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.471067821718293, 3.386101456833444, 5.733211438137744, 13.851032789172905]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.0033858512495044, -3.9739938119136013, -0.5197557384387324, 13.55751286674979]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.737761647973251, -8.187783738716929, -5.9991206567836874, -5.080617018630278]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.568005564374744, -10.513889302434563, -8.109514724019732, -5.377830877492329]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0975741228581133, -2.2099992080597426, -1.619100855251111, -1.3227170095653666]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7920206440246225, -2.828078554832083, -2.1109541227378044, -1.3480771356669263]}}