{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:52.347236", "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": "2022-Jan-21_to_2022-Jan-24_38.0_-7.5"}, "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": 2022010000849}, "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": "January 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2022"}, "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": 61294.57273129211}, "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": ["Tanzania, United Republic of"]}, "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": -7.5}, "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": 38.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "38.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 39.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[36.35, -6.25], [36.25, -6.0], [36.47, -5.47], [37.0, -5.25], [37.53, -5.47], [37.68, -5.82], [38.0, -5.96], [38.5, -5.75], [39.03, -5.97], [39.25, -6.5], [39.15, -6.75], [39.18, -6.82], [39.53, -6.97], [39.68, -7.32], [40.03, -7.47], [40.25, -8.0], [40.03, -8.53], [39.68, -8.68], [39.53, -9.03], [39.0, -9.25], [38.75, -9.15], [38.5, -9.25], [38.25, -9.15], [38.0, -9.25], [37.75, -9.15], [37.5, -9.25], [36.97, -9.03], [36.75, -8.5], [36.85, -8.25], [36.82, -8.18], [36.47, -8.03], [36.25, -7.5], [36.35, -7.25], [36.25, -7.0], [36.35, -6.75], [36.25, -6.5], [36.35, -6.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.25, -7.0], [36.35, -6.75], [36.25, -6.5], [36.35, -6.25], [36.25, -6.0], [36.47, -5.47], [37.0, -5.25], [37.53, -5.47], [37.68, -5.82], [38.0, -5.96], [38.5, -5.75], [39.03, -5.97], [39.25, -6.5], [39.15, -6.75], [39.18, -6.82], [39.53, -6.97], [39.68, -7.32], [40.03, -7.47], [40.25, -8.0], [40.03, -8.53], [39.68, -8.68], [39.53, -9.03], [39.0, -9.25], [38.75, -9.15], [38.5, -9.25], [38.25, -9.15], [38.0, -9.25], [37.75, -9.15], [37.5, -9.25], [36.97, -9.03], [36.75, -8.5], [36.85, -8.25], [36.82, -8.18], [36.47, -8.03], [36.25, -7.5], [36.35, -7.25], [36.25, -7.0]]]]}, "2022-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.25, -7.0], [36.35, -6.75], [36.25, -6.5], [36.35, -6.25], [36.25, -6.0], [36.47, -5.47], [37.0, -5.25], [37.53, -5.47], [37.68, -5.82], [38.0, -5.96], [38.5, -5.75], [39.03, -5.97], [39.25, -6.5], [39.15, -6.75], [39.18, -6.82], [39.53, -6.97], [39.68, -7.32], [40.03, -7.47], [40.25, -8.0], [40.03, -8.53], [39.68, -8.68], [39.53, -9.03], [39.0, -9.25], [38.75, -9.15], [38.5, -9.25], [38.25, -9.15], [38.0, -9.25], [37.75, -9.15], [37.5, -9.25], [36.97, -9.03], [36.75, -8.5], [36.85, -8.25], [36.82, -8.18], [36.47, -8.03], [36.25, -7.5], [36.35, -7.25], [36.25, -7.0]]]]}, "2022-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.25, -7.0], [36.35, -6.75], [36.25, -6.5], [36.35, -6.25], [36.25, -6.0], [36.47, -5.47], [37.0, -5.25], [37.53, -5.47], [37.68, -5.82], [38.0, -5.96], [38.5, -5.75], [39.03, -5.97], [39.25, -6.5], [39.15, -6.75], [39.18, -6.82], [39.53, -6.97], [39.68, -7.32], [40.03, -7.47], [40.25, -8.0], [40.03, -8.53], [39.68, -8.68], [39.53, -9.03], [39.0, -9.25], [38.75, -9.15], [38.5, -9.25], [38.25, -9.15], [38.0, -9.25], [37.75, -9.15], [37.5, -9.25], [36.97, -9.03], [36.75, -8.5], [36.85, -8.25], [36.82, -8.18], [36.47, -8.03], [36.25, -7.5], [36.35, -7.25], [36.25, -7.0]]]]}, "2022-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.47, -6.97], [38.0, -6.75], [38.53, -6.97], [38.75, -7.5], [38.53, -8.03], [38.0, -8.25], [37.47, -8.03], [37.25, -7.5], [37.47, -6.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.493086393076737}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.241436526358983}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.612478272953297, 24.10684576031781, 24.67550954650642, 27.155372075509888]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.474138392065925, 21.02022421615186, 20.798442493576715, 27.155372075509888]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0346445150021624, -2.614614315872953, -2.0725121003107434, -2.2922094841807734]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.3542579840047324, -4.493086393076737, -3.213221933782563, -2.2922094841807734]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0367333265923877, -2.5242289049784725, -1.8726694857237025, -1.53385071568293]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.635826852247717, -3.512352845101492, -2.760200872192261, -1.53385071568293]}}