{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:40.526051", "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-Feb-28_to_2026-Mar-04_45.5_-16.0"}, "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": 2026020002696}, "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": "February 28 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 04 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 116412.80016146327}, "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": []}, "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": -16.0}, "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": 45.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "45.5\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": -18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[45.25, -17.0], [45.35, -16.75], [45.32, -16.68], [44.97, -16.53], [44.75, -16.0], [44.85, -15.75], [44.82, -15.68], [44.47, -15.53], [44.25, -15.0], [44.35, -14.75], [44.25, -14.5], [44.47, -13.97], [44.82, -13.82], [44.97, -13.47], [45.5, -13.25], [45.75, -13.35], [45.82, -13.32], [45.97, -12.97], [46.32, -12.82], [46.35, -12.75], [46.25, -12.5], [46.47, -11.97], [47.0, -11.75], [47.25, -11.85], [47.5, -11.75], [48.03, -11.97], [48.18, -12.32], [48.53, -12.47], [48.75, -13.0], [48.53, -13.53], [48.18, -13.68], [48.15, -13.75], [48.25, -14.0], [48.15, -14.25], [48.25, -14.5], [48.04, -15.0], [48.25, -15.5], [48.03, -16.03], [47.5, -16.25], [47.2, -16.12], [47.15, -16.25], [47.25, -16.5], [47.15, -16.75], [47.25, -17.0], [47.15, -17.25], [47.18, -17.32], [47.53, -17.47], [47.75, -18.0], [47.53, -18.53], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [45.97, -18.53], [45.82, -18.18], [45.47, -18.03], [45.25, -17.5], [45.35, -17.25], [45.25, -17.0]]]]}}, "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": {"2026-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.47, -18.03], [45.25, -17.5], [45.47, -16.97], [46.0, -16.75], [46.53, -16.97], [46.7, -17.37], [47.0, -17.25], [47.53, -17.47], [47.75, -18.0], [47.53, -18.53], [47.0, -18.75], [46.47, -18.53], [46.3, -18.12], [46.0, -18.25], [45.47, -18.03]]], [[[46.97, -13.53], [46.75, -13.0], [46.97, -12.47], [47.5, -12.25], [47.75, -12.35], [48.0, -12.25], [48.53, -12.47], [48.75, -13.0], [48.53, -13.53], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [46.97, -13.53]]]]}, "2026-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.25, -14.5], [44.47, -13.97], [44.82, -13.82], [44.97, -13.47], [45.5, -13.25], [45.75, -13.35], [45.82, -13.32], [45.97, -12.97], [46.32, -12.82], [46.35, -12.75], [46.25, -12.5], [46.47, -11.97], [47.0, -11.75], [47.25, -11.85], [47.5, -11.75], [48.03, -11.97], [48.18, -12.32], [48.53, -12.47], [48.75, -13.0], [48.53, -13.53], [48.18, -13.68], [48.15, -13.75], [48.25, -14.0], [48.15, -14.25], [48.25, -14.5], [48.04, -15.0], [48.25, -15.5], [48.03, -16.03], [47.5, -16.25], [47.2, -16.12], [47.15, -16.25], [47.25, -16.5], [47.15, -16.75], [47.25, -17.0], [47.15, -17.25], [47.18, -17.32], [47.53, -17.47], [47.75, -18.0], [47.53, -18.53], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [45.97, -18.53], [45.82, -18.18], [45.47, -18.03], [45.25, -17.5], [45.35, -17.25], [45.25, -17.0], [45.35, -16.75], [45.32, -16.68], [44.97, -16.53], [44.75, -16.0], [44.85, -15.75], [44.82, -15.68], [44.47, -15.53], [44.25, -15.0], [44.35, -14.75], [44.25, -14.5]]]]}, "2026-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.25, -14.5], [44.47, -13.97], [44.82, -13.82], [44.97, -13.47], [45.5, -13.25], [45.75, -13.35], [45.82, -13.32], [45.97, -12.97], [46.32, -12.82], [46.35, -12.75], [46.25, -12.5], [46.47, -11.97], [47.0, -11.75], [47.25, -11.85], [47.5, -11.75], [48.03, -11.97], [48.18, -12.32], [48.53, -12.47], [48.75, -13.0], [48.53, -13.53], [48.18, -13.68], [48.15, -13.75], [48.25, -14.0], [48.15, -14.25], [48.25, -14.5], [48.04, -15.0], [48.25, -15.5], [48.03, -16.03], [47.5, -16.25], [47.2, -16.12], [47.15, -16.25], [47.25, -16.5], [47.15, -16.75], [47.25, -17.0], [47.15, -17.25], [47.18, -17.32], [47.53, -17.47], [47.75, -18.0], [47.53, -18.53], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [45.97, -18.53], [45.82, -18.18], [45.47, -18.03], [45.25, -17.5], [45.35, -17.25], [45.25, -17.0], [45.35, -16.75], [45.32, -16.68], [44.97, -16.53], [44.75, -16.0], [44.85, -15.75], [44.82, -15.68], [44.47, -15.53], [44.25, -15.0], [44.35, -14.75], [44.25, -14.5]]]]}, "2026-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.25, -14.5], [44.47, -13.97], [44.82, -13.82], [44.97, -13.47], [45.5, -13.25], [45.75, -13.35], [45.82, -13.32], [45.97, -12.97], [46.32, -12.82], [46.35, -12.75], [46.25, -12.5], [46.47, -11.97], [47.0, -11.75], [47.25, -11.85], [47.5, -11.75], [48.03, -11.97], [48.18, -12.32], [48.53, -12.47], [48.75, -13.0], [48.53, -13.53], [48.18, -13.68], [48.15, -13.75], [48.25, -14.0], [48.15, -14.25], [48.25, -14.5], [48.04, -15.0], [48.25, -15.5], [48.03, -16.03], [47.5, -16.25], [47.2, -16.12], [47.15, -16.25], [47.25, -16.5], [47.15, -16.75], [47.25, -17.0], [47.15, -17.25], [47.25, -17.5], [47.15, -17.75], [47.25, -18.0], [47.03, -18.53], [46.5, -18.75], [45.97, -18.53], [45.82, -18.18], [45.47, -18.03], [45.25, -17.5], [45.35, -17.25], [45.25, -17.0], [45.35, -16.75], [45.32, -16.68], [44.97, -16.53], [44.75, -16.0], [44.85, -15.75], [44.82, -15.68], [44.47, -15.53], [44.25, -15.0], [44.35, -14.75], [44.25, -14.5]]]]}, "2026-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.25, -15.0], [44.47, -14.47], [45.0, -14.25], [45.53, -14.47], [45.75, -15.0], [45.63, -15.3], [46.03, -15.47], [46.25, -16.0], [46.03, -16.53], [45.5, -16.75], [44.97, -16.53], [44.75, -16.0], [44.88, -15.7], [44.47, -15.53], [44.25, -15.0]]], [[[47.5, -13.25], [46.97, -13.03], [46.75, -12.5], [46.97, -11.97], [47.5, -11.75], [48.03, -11.97], [48.25, -12.5], [48.03, -13.03], [47.5, -13.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 2.2522068980023278}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.3971079081754116}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.37672068277999, 28.305998836419576, 28.14741042699569, 28.567978159586573, 28.358149888780417]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.92115427652999, 29.569351450602255, 29.256628926595056, 29.61513799031576, 28.510547892252646]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.9356017353455996, 1.453647218860936, 1.27103220959631, 1.5397615032429173, 1.1094769770432624]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.1041388199610083, 1.941860013966732, 1.8384108565830388, 2.2522068980023278, 1.3120335747287868]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2258363269107138, 1.9004314297660931, 1.6321788041876637, 1.917174729740438, 1.475080959942738]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.325819018709482, 2.53886318565527, 2.313805774329341, 2.829238406728473, 1.5411801957731295]}}