{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:18:27.730377", "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": "2020-Jan-01_to_2020-Jan-04_47.0_-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": 2020010000031}, "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 01 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 04 2020"}, "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": 59218.83002048638}, "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": -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": 47.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.0\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": 47.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.47, -15.97], [45.0, -15.75], [45.25, -15.85], [45.32, -15.82], [45.47, -15.47], [46.0, -15.25], [46.25, -15.35], [46.5, -15.25], [46.75, -15.35], [47.0, -15.25], [47.25, -15.35], [47.5, -15.25], [48.03, -15.47], [48.25, -16.0], [48.15, -16.25], [48.25, -16.5], [48.03, -17.03], [47.68, -17.18], [47.65, -17.25], [47.75, -17.5], [47.53, -18.03], [47.0, -18.25], [46.75, -18.15], [46.5, -18.25], [45.97, -18.03], [45.75, -17.5], [45.85, -17.25], [45.82, -17.18], [45.75, -17.15], [45.68, -17.18], [45.53, -17.53], [45.0, -17.75], [44.47, -17.53], [44.25, -17.0], [44.35, -16.75], [44.25, -16.5], [44.47, -15.97]]]]}, "2020-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.35, -16.75], [44.25, -16.5], [44.47, -15.97], [45.0, -15.75], [45.25, -15.85], [45.32, -15.82], [45.47, -15.47], [46.0, -15.25], [46.25, -15.35], [46.32, -15.32], [46.47, -14.97], [47.0, -14.75], [47.53, -14.97], [47.68, -15.32], [48.03, -15.47], [48.25, -16.0], [48.15, -16.25], [48.25, -16.5], [48.15, -16.75], [48.25, -17.0], [48.03, -17.53], [47.68, -17.68], [47.53, -18.03], [47.0, -18.25], [46.75, -18.15], [46.5, -18.25], [46.0, -18.04], [45.5, -18.25], [45.25, -18.15], [45.0, -18.25], [44.47, -18.03], [44.25, -17.5], [44.35, -17.25], [44.25, -17.0], [44.35, -16.75]]]]}, "2020-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.35, -16.75], [44.25, -16.5], [44.47, -15.97], [45.0, -15.75], [45.25, -15.85], [45.32, -15.82], [45.47, -15.47], [46.0, -15.25], [46.25, -15.35], [46.32, -15.32], [46.47, -14.97], [47.0, -14.75], [47.53, -14.97], [47.68, -15.32], [48.03, -15.47], [48.25, -16.0], [48.15, -16.25], [48.25, -16.5], [48.15, -16.75], [48.25, -17.0], [48.03, -17.53], [47.68, -17.68], [47.53, -18.03], [47.0, -18.25], [46.75, -18.15], [46.5, -18.25], [46.0, -18.04], [45.5, -18.25], [45.25, -18.15], [45.0, -18.25], [44.47, -18.03], [44.25, -17.5], [44.35, -17.25], [44.25, -17.0], [44.35, -16.75]]]]}, "2020-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.35, -16.75], [44.25, -16.5], [44.47, -15.97], [45.0, -15.75], [45.3, -15.87], [45.47, -15.47], [46.0, -15.25], [46.25, -15.35], [46.32, -15.32], [46.47, -14.97], [47.0, -14.75], [47.53, -14.97], [47.68, -15.32], [48.03, -15.47], [48.25, -16.0], [48.15, -16.25], [48.25, -16.5], [48.15, -16.75], [48.25, -17.0], [48.03, -17.53], [47.68, -17.68], [47.53, -18.03], [47.0, -18.25], [46.75, -18.15], [46.5, -18.25], [46.0, -18.04], [45.5, -18.25], [45.25, -18.15], [45.0, -18.25], [44.47, -18.03], [44.25, -17.5], [44.35, -17.25], [44.25, -17.0], [44.35, -16.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.085009796260181}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1249242207153047}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.729925781635416, 24.18755485925368, 24.170091827255817, 24.246830295790005]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.35221871156051, 21.810153555428485, 21.376996153443997, 22.05559109348195]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9967059055442253, -2.185581020438596, -2.184491178278819, -2.0995978829168873]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2318579602005, -2.7060030245124267, -3.085009796260181, -2.575425706327451]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5475706922707837, -1.7657857627741407, -1.7933747664902673, -1.7344696055643736]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7437429816523438, -1.9169095015912283, -2.431752409709781, -1.9271760614108764]}}