{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:14.930653", "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-Dec-23_to_2022-Dec-27_313.5_-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": 2022120001057}, "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": "December 23 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2022"}, "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": "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": 56510.9913016084}, "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": ["Brazil"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": 313.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "313.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 312.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 315.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.0}, "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": [[[[-45.47, -17.03], [-46.0, -17.25], [-46.25, -17.15], [-46.32, -17.18], [-46.47, -17.53], [-47.0, -17.75], [-47.53, -17.53], [-47.68, -17.18], [-48.03, -17.03], [-48.25, -16.5], [-48.15, -16.25], [-48.25, -16.0], [-48.03, -15.47], [-47.68, -15.32], [-47.53, -14.97], [-47.18, -14.82], [-47.03, -14.47], [-46.5, -14.25], [-46.25, -14.35], [-46.18, -14.32], [-46.03, -13.97], [-45.5, -13.75], [-44.97, -13.97], [-44.75, -14.5], [-44.85, -14.75], [-44.82, -14.82], [-44.47, -14.97], [-44.25, -15.5], [-44.47, -16.03], [-44.82, -16.18], [-44.97, -16.53], [-45.32, -16.68], [-45.47, -17.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-47.25, -16.0], [-47.02999999999997, -15.47], [-46.5, -15.25], [-45.97000000000003, -15.47], [-45.81999999999999, -15.82], [-45.47000000000003, -15.97], [-45.25, -16.5], [-45.47000000000003, -17.03], [-46.0, -17.25], [-46.25, -17.15], [-46.5, -17.25], [-47.02999999999997, -17.03], [-47.25, -16.5], [-47.14999999999998, -16.25], [-47.25, -16.0]]]]}, "2022-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.02999999999997, -16.53], [-48.25, -16.0], [-48.02999999999997, -15.47], [-47.5, -15.25], [-47.25, -15.35], [-47.18000000000001, -15.32], [-47.14999999999998, -15.25], [-47.25, -15.0], [-47.02999999999997, -14.47], [-46.5, -14.25], [-46.25, -14.35], [-46.18000000000001, -14.32], [-46.02999999999997, -13.97], [-45.5, -13.75], [-44.97000000000003, -13.97], [-44.75, -14.5], [-44.85000000000002, -14.75], [-44.81999999999999, -14.82], [-44.47000000000003, -14.97], [-44.25, -15.5], [-44.47000000000003, -16.03], [-44.81999999999999, -16.18], [-44.97000000000003, -16.53], [-45.31999999999999, -16.68], [-45.47000000000003, -17.03], [-46.0, -17.25], [-46.25, -17.15], [-46.5, -17.25], [-46.75, -17.15], [-47.0, -17.25], [-47.52999999999997, -17.03], [-47.68000000000001, -16.68], [-48.02999999999997, -16.53]]]]}, "2022-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -16.0], [-48.02999999999997, -15.47], [-47.68000000000001, -15.32], [-47.52999999999997, -14.97], [-47.18000000000001, -14.82], [-47.02999999999997, -14.47], [-46.5, -14.25], [-46.25, -14.35], [-46.18000000000001, -14.32], [-46.02999999999997, -13.97], [-45.5, -13.75], [-44.97000000000003, -13.97], [-44.75, -14.5], [-44.85000000000002, -14.75], [-44.81999999999999, -14.82], [-44.47000000000003, -14.97], [-44.25, -15.5], [-44.47000000000003, -16.03], [-44.81999999999999, -16.18], [-44.97000000000003, -16.53], [-45.31999999999999, -16.68], [-45.47000000000003, -17.03], [-46.0, -17.25], [-46.25, -17.15], [-46.31999999999999, -17.18], [-46.47000000000003, -17.53], [-47.0, -17.75], [-47.52999999999997, -17.53], [-47.68000000000001, -17.18], [-48.02999999999997, -17.03], [-48.25, -16.5], [-48.14999999999998, -16.25], [-48.25, -16.0]]]]}, "2022-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -16.0], [-48.02999999999997, -15.47], [-47.68000000000001, -15.32], [-47.52999999999997, -14.97], [-47.18000000000001, -14.82], [-47.02999999999997, -14.47], [-46.5, -14.25], [-46.25, -14.35], [-46.18000000000001, -14.32], [-46.02999999999997, -13.97], [-45.5, -13.75], [-44.97000000000003, -13.97], [-44.75, -14.5], [-44.85000000000002, -14.75], [-44.81999999999999, -14.82], [-44.47000000000003, -14.97], [-44.25, -15.5], [-44.47000000000003, -16.03], [-44.81999999999999, -16.18], [-44.97000000000003, -16.53], [-45.31999999999999, -16.68], [-45.47000000000003, -17.03], [-46.0, -17.25], [-46.25, -17.15], [-46.31999999999999, -17.18], [-46.47000000000003, -17.53], [-47.0, -17.75], [-47.52999999999997, -17.53], [-47.68000000000001, -17.18], [-48.02999999999997, -17.03], [-48.25, -16.5], [-48.14999999999998, -16.25], [-48.25, -16.0]]]]}, "2022-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -16.0], [-48.02999999999997, -15.47], [-47.68000000000001, -15.32], [-47.52999999999997, -14.97], [-47.18000000000001, -14.82], [-47.02999999999997, -14.47], [-46.5, -14.25], [-46.25, -14.35], [-46.0, -14.25], [-45.47000000000003, -14.47], [-45.25, -15.0], [-45.35000000000002, -15.25], [-45.25, -15.5], [-45.35000000000002, -15.75], [-45.25, -16.0], [-45.47000000000003, -16.53], [-45.81999999999999, -16.68], [-45.97000000000003, -17.03], [-46.31999999999999, -17.18], [-46.47000000000003, -17.53], [-47.0, -17.75], [-47.52999999999997, -17.53], [-47.68000000000001, -17.18], [-48.02999999999997, -17.03], [-48.25, -16.5], [-48.14999999999998, -16.25], [-48.25, -16.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.5900082194667675}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.474912094058036}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.578209787483786, 22.286069994111187, 21.621826871536996, 21.11292730204019, 21.660185923075858]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.16830606218076, 21.425991507201672, 20.917301186255997, 19.89506881524727, 20.770603765578016]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7762321848873057, -2.069173292979624, -2.56075494310756, -3.0172712385751526, -2.2173753761350055]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8469566189182274, -2.4116268529370473, -3.1455758953371173, -3.5900082194667675, -2.7992576514567986]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.099903096142708, -1.2734370208431474, -1.5640877312065458, -1.8531231948828757, -1.4030017540638862]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1462264910188988, -1.4238671718214595, -1.9030846527447185, -2.22170980178915, -1.7333259784099577]}}