{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:17.959381", "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-May-29_to_2022-Jun-01_48.0_-17.0"}, "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": 2022050001074}, "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": "May 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 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": 74078.8748362811}, "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": -17.0}, "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": 48.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[47.32, -16.32], [47.35, -16.25], [47.32, -16.18], [46.97, -16.03], [46.75, -15.5], [46.97, -14.97], [47.5, -14.75], [47.75, -14.85], [47.88, -14.8], [47.75, -14.5], [47.97, -13.97], [48.5, -13.75], [49.03, -13.97], [49.18, -14.32], [49.25, -14.35], [49.5, -14.25], [49.75, -14.35], [50.0, -14.25], [50.53, -14.47], [50.75, -15.0], [50.53, -15.53], [50.0, -15.75], [49.75, -15.65], [49.68, -15.68], [49.65, -15.75], [49.68, -15.82], [50.03, -15.97], [50.25, -16.5], [50.03, -17.03], [49.68, -17.18], [49.65, -17.25], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.53, -19.03], [49.18, -19.18], [49.03, -19.53], [48.5, -19.75], [47.97, -19.53], [47.75, -19.0], [47.85, -18.75], [47.75, -18.5], [47.88, -18.2], [47.47, -18.03], [47.32, -17.68], [46.97, -17.53], [46.75, -17.0], [46.97, -16.47], [47.32, -16.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.25, -16.5], [47.47, -15.97], [47.82, -15.82], [47.85, -15.75], [47.75, -15.5], [47.96, -15.0], [47.75, -14.5], [47.97, -13.97], [48.5, -13.75], [49.03, -13.97], [49.18, -14.32], [49.25, -14.35], [49.5, -14.25], [49.75, -14.35], [50.0, -14.25], [50.53, -14.47], [50.75, -15.0], [50.53, -15.53], [50.0, -15.75], [49.75, -15.65], [49.68, -15.68], [49.65, -15.75], [49.68, -15.82], [50.03, -15.97], [50.25, -16.5], [50.03, -17.03], [49.68, -17.18], [49.65, -17.25], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.53, -19.03], [49.18, -19.18], [49.03, -19.53], [48.5, -19.75], [47.97, -19.53], [47.75, -19.0], [47.85, -18.75], [47.75, -18.5], [47.97, -17.97], [48.32, -17.82], [48.35, -17.75], [48.32, -17.68], [48.25, -17.65], [48.0, -17.75], [47.47, -17.53], [47.25, -17.0], [47.35, -16.75], [47.25, -16.5]]]]}, "2022-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -17.53], [46.75, -17.0], [46.97, -16.47], [47.32, -16.32], [47.35, -16.25], [47.32, -16.18], [46.97, -16.03], [46.75, -15.5], [46.97, -14.97], [47.5, -14.75], [47.75, -14.85], [47.88, -14.8], [47.75, -14.5], [47.97, -13.97], [48.5, -13.75], [49.03, -13.97], [49.18, -14.32], [49.25, -14.35], [49.5, -14.25], [49.75, -14.35], [50.0, -14.25], [50.53, -14.47], [50.75, -15.0], [50.53, -15.53], [50.0, -15.75], [49.75, -15.65], [49.68, -15.68], [49.65, -15.75], [49.68, -15.82], [50.03, -15.97], [50.25, -16.5], [50.03, -17.03], [49.68, -17.18], [49.65, -17.25], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.53, -19.03], [49.18, -19.18], [49.03, -19.53], [48.5, -19.75], [47.97, -19.53], [47.75, -19.0], [47.85, -18.75], [47.75, -18.5], [47.88, -18.2], [47.47, -18.03], [47.32, -17.68], [46.97, -17.53]]]]}, "2022-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -17.53], [46.75, -17.0], [46.97, -16.47], 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[46.97, -14.97], [47.5, -14.75], [47.75, -14.85], [48.0, -14.75], [48.53, -14.97], [48.68, -15.32], [49.03, -15.47], [49.25, -16.0], [49.03, -16.53], [48.63, -16.7], [48.75, -17.0], [48.65, -17.25], [48.75, -17.5], [48.53, -18.03], [48.0, -18.25], [47.47, -18.03], [47.32, -17.68], [46.97, -17.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3189113785260815}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.924879914423042}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.115324266996197, 18.510378037771886, 18.16892623891198, 20.874671713874648]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.960862704390422, 15.497437440281203, 15.035779441869693, 17.218063827055403]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6076259056380422, -1.9530692752508207, -2.215277799649093, -1.6935083464736473]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.067561510487053, -2.7042013675639964, -3.3189113785260815, -2.019801337898059]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3889929998727661, -1.71392810655956, -1.92677551102343, -1.5746991362451062]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6388441091098027, -2.2502941820023685, -2.76494501759147, -2.005331704824834]}}