{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:21.904497", "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-25_to_2022-Dec-27_270.5_19.0"}, "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": 2022120001162}, "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 25 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": 3}, "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": 52435.565278205235}, "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": ["Mexico"]}, "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": 19.0}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 20.03], [-90.68, 20.18], [-90.53, 20.53], [-90.18, 20.68], [-90.03, 21.03], [-89.5, 21.25], [-89.25, 21.15], [-89.0, 21.25], [-88.75, 21.15], [-88.5, 21.25], [-87.97, 21.03], [-87.75, 20.5], [-87.85, 20.25], [-87.75, 20.0], [-87.85, 19.75], [-87.75, 19.5], [-87.97, 18.97], [-88.32, 18.82], [-88.35, 18.75], [-88.25, 18.5], [-88.47, 17.97], [-89.0, 17.75], [-89.25, 17.85], [-89.5, 17.75], [-89.75, 17.85], [-90.0, 17.75], [-90.53, 17.97], [-90.75, 18.5], [-90.65, 18.75], [-90.68, 18.82], [-91.03, 18.97], [-91.25, 19.5], [-91.03, 20.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 18.97], [-91.25, 19.5], [-91.02999999999997, 20.03], [-90.68, 20.18], [-90.52999999999997, 20.53], [-90.18, 20.68], [-90.02999999999997, 21.03], [-89.5, 21.25], [-89.25, 21.15], [-89.0, 21.25], [-88.75, 21.15], [-88.5, 21.25], [-87.97000000000003, 21.03], [-87.75, 20.5], [-87.85000000000002, 20.25], [-87.75, 20.0], [-87.85000000000002, 19.75], [-87.75, 19.5], [-87.97000000000003, 18.97], [-88.32, 18.82], [-88.35000000000002, 18.75], [-88.25, 18.5], [-88.47000000000003, 17.97], [-89.0, 17.75], [-89.25, 17.85], [-89.5, 17.75], [-89.75, 17.85], [-90.0, 17.75], [-90.52999999999997, 17.97], [-90.75, 18.5], [-90.64999999999998, 18.75], [-90.68, 18.82], [-91.02999999999997, 18.97]]]]}, "2022-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 18.97], [-91.25, 19.5], [-91.02999999999997, 20.03], [-90.68, 20.18], [-90.52999999999997, 20.53], [-90.18, 20.68], [-90.02999999999997, 21.03], [-89.5, 21.25], [-89.25, 21.15], [-89.0, 21.25], [-88.75, 21.15], [-88.5, 21.25], [-87.97000000000003, 21.03], [-87.75, 20.5], [-87.85000000000002, 20.25], [-87.75, 20.0], [-87.85000000000002, 19.75], [-87.75, 19.5], [-87.97000000000003, 18.97], [-88.32, 18.82], [-88.35000000000002, 18.75], [-88.25, 18.5], [-88.47000000000003, 17.97], [-89.0, 17.75], [-89.25, 17.85], [-89.5, 17.75], [-89.75, 17.85], [-90.0, 17.75], [-90.52999999999997, 17.97], [-90.75, 18.5], [-90.64999999999998, 18.75], [-90.68, 18.82], [-91.02999999999997, 18.97]]]]}, "2022-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 18.97], [-91.25, 19.5], [-91.02999999999997, 20.03], [-90.68, 20.18], [-90.52999999999997, 20.53], [-90.18, 20.68], [-90.02999999999997, 21.03], [-89.5, 21.25], [-89.25, 21.15], [-89.0, 21.25], [-88.75, 21.15], [-88.5, 21.25], [-87.97000000000003, 21.03], [-87.75, 20.5], [-87.85000000000002, 20.25], [-87.75, 20.0], [-87.85000000000002, 19.75], [-87.75, 19.5], [-87.97000000000003, 18.97], [-88.32, 18.82], [-88.35000000000002, 18.75], [-88.25, 18.5], [-88.47000000000003, 17.97], [-89.0, 17.75], [-89.25, 17.85], [-89.5, 17.75], [-89.75, 17.85], [-90.0, 17.75], [-90.52999999999997, 17.97], [-90.75, 18.5], [-90.64999999999998, 18.75], [-90.68, 18.82], [-91.02999999999997, 18.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.097473245281776}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.853110341935116}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.934855988905383, 18.87007739766466, 20.32851615507184]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.361513382574344, 18.100737663287816, 19.394734250004035]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6250470736715577, -4.685419305463565, -3.2488646466702247]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.349396291089249, -5.097473245281776, -3.988989470624233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7394042767592153, -2.3192133105634842, -1.5782464839500578]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8961274263369645, -2.5743768466496064, -1.8940689582540577]}}