{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:51.309333", "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": "2013-Mar-29_to_2013-Apr-04_40.5_13.5"}, "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": 2013030000954}, "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": "March 29 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 57408.36459404204}, "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": ["Ethiopia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "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": []}, "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": 13.5}, "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": 40.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "40.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 39.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 41.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, 14.25], [41.03, 14.03], [41.25, 13.5], [41.03, 12.97], [40.5, 12.75], [39.97, 12.97], [39.75, 13.5], [39.97, 14.03], [40.5, 14.25]]]]}, "2013-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, 14.25], [41.03, 14.03], [41.25, 13.5], [41.03, 12.97], [40.5, 12.75], [39.97, 12.97], [39.75, 13.5], [39.97, 14.03], [40.5, 14.25]]]]}, "2013-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, 14.25], [41.03, 14.03], [41.25, 13.5], [41.03, 12.97], [40.5, 12.75], [39.97, 12.97], [39.75, 13.5], [39.97, 14.03], [40.5, 14.25]]]]}, "2013-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, 12.5], [39.47, 13.03], [39.82, 13.18], [39.85, 13.25], [39.75, 13.5], [39.97, 14.03], [40.5, 14.25], [41.03, 14.03], [41.18, 13.68], [41.53, 13.53], [41.75, 13.0], [41.65, 12.75], [41.75, 12.5], [41.53, 11.97], [41.18, 11.82], [41.15, 11.75], [41.25, 11.5], [41.15, 11.25], [41.25, 11.0], [41.03, 10.47], [40.5, 10.25], [39.97, 10.47], [39.75, 11.0], [39.85, 11.25], [39.75, 11.5], [39.85, 11.75], [39.82, 11.82], [39.47, 11.97], [39.25, 12.5]]]]}, "2013-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.35, 12.25], [39.25, 12.5], [39.35, 12.75], [39.25, 13.0], [39.47, 13.53], [39.82, 13.68], [39.97, 14.03], [40.5, 14.25], [41.03, 14.03], [41.18, 13.68], [41.25, 13.65], [41.5, 13.75], [42.03, 13.53], [42.25, 13.0], [42.15, 12.75], [42.25, 12.5], [42.15, 12.25], [42.25, 12.0], [42.04, 11.5], [42.25, 11.0], [42.03, 10.47], [41.5, 10.25], [41.25, 10.35], [41.0, 10.25], [40.75, 10.35], [40.5, 10.25], [39.97, 10.47], [39.82, 10.82], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0], [39.35, 12.25]]]]}, "2013-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.35, 12.25], [39.25, 12.5], [39.35, 12.75], [39.25, 13.0], [39.47, 13.53], [39.82, 13.68], [39.97, 14.03], [40.5, 14.25], [41.03, 14.03], [41.18, 13.68], [41.25, 13.65], [41.5, 13.75], [42.03, 13.53], [42.25, 13.0], [42.15, 12.75], [42.25, 12.5], [42.15, 12.25], [42.25, 12.0], [42.04, 11.5], [42.25, 11.0], [42.03, 10.47], [41.5, 10.25], [41.25, 10.35], [41.0, 10.25], [40.75, 10.35], [40.5, 10.25], [39.97, 10.47], [39.82, 10.82], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0], [39.35, 12.25]]]]}, "2013-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.35, 12.25], [39.25, 12.5], [39.35, 12.75], [39.25, 13.0], [39.47, 13.53], [39.82, 13.68], [39.97, 14.03], [40.5, 14.25], [41.03, 14.03], [41.2, 13.63], [41.5, 13.75], [42.03, 13.53], [42.25, 13.0], [42.15, 12.75], [42.25, 12.5], [42.15, 12.25], [42.25, 12.0], [42.04, 11.5], [42.25, 11.0], [42.03, 10.47], [41.5, 10.25], [41.25, 10.35], [41.0, 10.25], [40.75, 10.35], [40.5, 10.25], [39.97, 10.47], [39.82, 10.82], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0], [39.35, 12.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.657867021540596}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6892685353378396}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.66806881204775, 28.782868661015584, 29.6918286951215, 26.896678074895476, 26.226680749769116, 25.35479322530165, 26.563874650403307]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.66806881204775, 28.782868661015584, 29.6918286951215, 24.083394779155753, 21.66356124455325, 20.862365450010827, 22.08274259282183]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7216365589503084, -3.8758614540239478, -3.2062789719060447, -3.504719499232427, -3.49823508795838, -4.508132859083901, -3.1335009406220897]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7216365589503084, -3.8758614540239478, -3.2062789719060447, -3.965750438588202, -4.811174614449783, -5.657867021540596, -4.397189172922197]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4052940771498084, -1.5166958228876173, -1.3079835316777437, -1.7132663222422093, -1.9505150856703144, -2.5657804348862676, -1.7232965904881765]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4052940771498084, -1.5166958228876173, -1.3079835316777437, -1.9117608324864297, -2.4125848729719293, -3.016562474080308, -2.1725601913622965]}}