{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:11.833435", "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": "2026-Apr-01_to_2026-Apr-06_46.5_-14.5"}, "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": 2026040000020}, "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": "April 01 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2026"}, "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": 74542.70392110401}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "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": ["Mozambique Channel"]}, "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": -14.5}, "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": 46.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.5, -13.75], [47.03, -13.97], [47.25, -14.5], [47.03, -15.03], [46.5, -15.25], [45.97, -15.03], [45.75, -14.5], [45.97, -13.97], [46.5, -13.75]]]]}, "2026-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.75, -14.5], [45.97, -13.97], [46.5, -13.75], [46.75, -13.85], [46.82, -13.82], [46.97, -13.47], [47.5, -13.25], [48.03, -13.47], [48.25, -14.0], [48.15, -14.25], [48.25, -14.5], [48.03, -15.03], [47.68, -15.18], [47.53, -15.53], [47.0, -15.75], [46.47, -15.53], [46.32, -15.18], [45.97, -15.03], [45.75, -14.5]]]]}, "2026-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -15.97], [45.32, -15.82], [45.35, -15.75], [45.25, -15.5], [45.35, -15.25], [45.25, -15.0], [45.47, -14.47], [45.82, -14.32], [45.97, -13.97], [46.5, -13.75], [46.75, -13.85], [46.82, -13.82], [46.85, -13.75], [46.75, -13.5], [46.97, -12.97], [47.5, -12.75], [47.75, -12.85], [48.0, -12.75], [48.53, -12.97], [48.75, -13.5], [48.53, -14.03], [48.18, -14.18], [48.15, -14.25], [48.18, -14.32], [48.53, -14.47], [48.75, -15.0], [48.53, -15.53], [48.0, -15.75], [47.75, -15.65], [47.68, -15.68], [47.54, -16.0], [47.75, -16.5], [47.53, -17.03], [47.0, -17.25], [46.75, -17.15], [46.5, -17.25], [46.25, -17.15], [46.18, -17.18], [46.03, -17.53], [45.5, -17.75], [44.97, -17.53], [44.75, -17.0], [44.85, -16.75], [44.75, -16.5], [44.97, -15.97]]]]}, "2026-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.75, -14.5], [44.97, -13.97], [45.5, -13.75], [46.0, -13.96], [46.5, -13.75], [46.75, -13.85], [46.82, -13.82], [46.85, -13.75], [46.75, -13.5], [46.97, -12.97], [47.5, -12.75], [47.75, -12.85], [48.0, -12.75], [48.53, -12.97], [48.75, -13.5], [48.53, -14.03], [48.18, -14.18], [48.15, -14.25], [48.18, -14.32], [48.53, -14.47], [48.75, -15.0], [48.53, -15.53], [48.0, -15.75], [47.75, -15.65], [47.68, -15.68], [47.54, -16.0], [47.75, -16.5], [47.53, -17.03], [47.0, -17.25], [46.75, -17.15], [46.5, -17.25], [46.25, -17.15], [46.18, -17.18], [46.03, -17.53], [45.5, -17.75], [44.97, -17.53], [44.75, 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-14.5]]]]}, "2026-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.75, -14.5], [44.97, -13.97], [45.5, -13.75], [46.03, -13.97], [46.18, -14.32], [46.53, -14.47], [46.75, -15.0], [46.54, -15.5], [46.68, -15.82], [47.03, -15.97], [47.25, -16.5], [47.03, -17.03], [46.5, -17.25], [46.25, -17.15], [46.18, -17.18], [46.03, -17.53], [45.5, -17.75], [44.97, -17.53], [44.75, -17.0], [44.85, -16.75], [44.75, -16.5], [44.88, -16.2], [44.47, -16.03], [44.25, -15.5], [44.47, -14.97], [44.82, -14.82], [44.85, -14.75], [44.75, -14.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.6437579747771451}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.186941684277158}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.70189565022787, 26.692973836263036, 26.341313086615685, 26.29890614827474, 26.464190012613983, 26.170654551188193]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.70189565022787, 26.449939982096396, 23.784238433837913, 23.958538309733115, 24.103340403238974, 23.68497746785482]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.039284042788097, -0.9003480011462444, -1.2113802736627743, -1.283774495982193, -1.1221981071892584, -1.2134601657388884]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.039284042788097, -0.9825080812498754, -1.6437579747771451, -1.497927711183479, -1.3337315751816732, -1.5824008068106536]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5902376000767355, -1.443366167336446, -1.6099351916454656, -1.7678840090136825, -1.5376682047088621, -1.540470819373941]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5902376000767355, -1.5557669141561845, -2.2316058853003042, -2.5508556213744633, -1.9915089782907371, -1.7695425276643308]}}