{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:11.148117", "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-Aug-10_to_2022-Aug-15_49.0_-11.0"}, "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": 2022080000497}, "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 10 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2022"}, "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": 78456.52118030086}, "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": ["Madagascar"]}, "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": -11.0}, "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": 49.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 53.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[50.03, -14.03], [49.5, -14.25], [48.97, -14.03], [48.75, -13.5], [48.85, -13.25], [48.75, -13.0], [48.88, -12.7], [48.47, -12.53], [48.25, -12.0], [48.35, -11.75], [48.32, -11.68], [47.97, -11.53], [47.75, -11.0], [47.85, -10.75], [47.75, -10.5], [47.97, -9.97], [48.5, -9.75], [49.03, -9.97], [49.18, -10.32], [49.25, -10.35], [49.5, -10.25], [50.03, -10.47], [50.18, -10.82], [50.53, -10.97], [50.68, -11.32], [51.03, -11.47], [51.18, -11.82], [51.53, -11.97], [51.68, -12.32], [52.03, -12.47], [52.18, -12.82], [52.53, -12.97], [52.68, -13.32], [52.75, -13.35], [53.0, -13.25], [53.53, -13.47], [53.75, -14.0], [53.53, -14.53], [53.0, -14.75], [52.75, -14.65], [52.5, -14.75], [52.25, -14.65], [52.0, -14.75], [51.47, -14.53], [51.32, -14.18], [51.25, -14.15], [51.0, -14.25], [50.47, -14.03], [50.32, -13.68], [50.25, -13.65], [50.18, -13.68], [50.03, -14.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar", "Equatorial.Indian-Ocean", "S.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.75, -10.5], [47.97, -9.97], [48.5, -9.75], [49.03, -9.97], [49.18, -10.32], [49.25, -10.35], [49.5, -10.25], [50.03, -10.47], [50.18, -10.82], [50.53, -10.97], [50.68, -11.32], [51.03, -11.47], [51.18, -11.82], [51.53, -11.97], [51.68, -12.32], [52.03, -12.47], [52.18, -12.82], [52.53, -12.97], [52.68, -13.32], [52.75, -13.35], [53.0, -13.25], [53.53, -13.47], [53.75, -14.0], [53.53, -14.53], [53.0, -14.75], [52.75, -14.65], [52.5, -14.75], [52.25, -14.65], [52.0, -14.75], [51.47, -14.53], [51.32, -14.18], [51.25, -14.15], [51.0, -14.25], [50.47, -14.03], [50.32, -13.68], [50.25, -13.65], [50.0, -13.75], [49.47, -13.53], [49.25, -13.0], [49.35, -12.75], [49.32, -12.68], [48.97, -12.53], [48.82, -12.18], [48.47, -12.03], [48.32, -11.68], [47.97, -11.53], [47.75, -11.0], [47.85, -10.75], [47.75, -10.5]]]]}, "2022-08-11T11:30:00.000000000": {"type": 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.8945247608435931}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.826803988609413, 22.588432122763436, 22.455529350896768, 21.115047224245416, 19.970274272604, 21.874889957844346]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.228598336470725, 22.166071176784328, 18.14930640312565, 17.93292402941796, 17.988605759071902, 21.874889957844346]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7403593649514881, -0.9852778467864525, -0.930830154445307, -0.9044851719194374, -1.0631616617698967, -0.9874649286103931]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9922467594934687, -1.1838725529775047, -1.2042332396250117, -1.252952921843928, -1.242471245641127, -0.9874649286103931]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.53725980492872, -2.136944927676526, -1.9886227182653642, -1.3508565011986076, -1.4216098944224531, -1.4494536526186197]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9172250825576314, -2.4258351225469656, -2.9410373365607145, -1.534906350815763, -1.540420971388356, -1.4494536526186197]}}