{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:15.079068", "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": "2023-May-20_to_2023-May-24_258.0_24.5"}, "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": 2023050000619}, "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 20 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 24 2023"}, "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": 115213.58848332083}, "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": 24.5}, "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": 258.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 26.15], [-103.68, 26.18], [-103.53, 26.53], [-103.18, 26.68], [-103.03, 27.03], [-102.5, 27.25], [-102.25, 27.15], [-102.0, 27.25], [-101.47, 27.03], [-101.32, 26.68], [-100.97, 26.53], [-100.82, 26.18], [-100.47, 26.03], [-100.25, 25.5], [-100.35, 25.25], [-100.25, 25.0], [-100.46, 24.5], [-100.25, 24.0], [-100.35, 23.75], [-100.25, 23.5], [-100.47, 22.97], [-100.82, 22.82], [-100.85, 22.75], [-100.75, 22.5], [-100.97, 21.97], [-101.5, 21.75], [-101.75, 21.85], [-102.0, 21.75], [-102.53, 21.97], [-102.68, 22.32], [-103.03, 22.47], [-103.18, 22.82], [-103.53, 22.97], [-103.68, 23.32], [-104.03, 23.47], [-104.25, 24.0], [-104.15, 24.25], [-104.18, 24.32], [-104.53, 24.47], [-104.75, 25.0], [-104.65, 25.25], [-104.75, 25.5], [-104.53, 26.03], [-104.0, 26.25], [-103.75, 26.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.75, 25.5], [-104.53, 26.03], [-104.0, 26.25], [-103.75, 26.15], [-103.68, 26.18], [-103.52999999999997, 26.53], [-103.18, 26.68], [-103.02999999999997, 27.03], [-102.5, 27.25], [-102.25, 27.15], [-102.0, 27.25], [-101.47000000000003, 27.03], [-101.32, 26.68], [-100.97000000000003, 26.53], [-100.82, 26.18], [-100.47000000000003, 26.03], [-100.25, 25.5], [-100.35000000000002, 25.25], [-100.25, 25.0], [-100.45999999999998, 24.5], [-100.25, 24.0], [-100.35000000000002, 23.75], [-100.25, 23.5], [-100.47000000000003, 22.97], [-100.82, 22.82], [-100.85000000000002, 22.75], [-100.75, 22.5], [-100.97000000000003, 21.97], [-101.5, 21.75], [-101.75, 21.85], [-102.0, 21.75], [-102.52999999999997, 21.97], [-102.68, 22.32], [-103.02999999999997, 22.47], [-103.18, 22.82], [-103.52999999999997, 22.97], [-103.68, 23.32], [-104.03, 23.47], [-104.25, 24.0], [-104.15, 24.25], [-104.18, 24.32], [-104.53, 24.47], [-104.75, 25.0], [-104.65, 25.25], [-104.75, 25.5]]]]}, 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25.0], [-104.65, 25.25], [-104.75, 25.5]]]]}, "2023-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.75, 25.5], [-104.53, 26.03], [-104.0, 26.25], [-103.75, 26.15], [-103.68, 26.18], [-103.52999999999997, 26.53], [-103.18, 26.68], [-103.02999999999997, 27.03], [-102.5, 27.25], [-102.25, 27.15], [-102.0, 27.25], [-101.47000000000003, 27.03], [-101.32, 26.68], [-100.97000000000003, 26.53], [-100.82, 26.18], [-100.47000000000003, 26.03], [-100.25, 25.5], [-100.35000000000002, 25.25], [-100.25, 25.0], [-100.45999999999998, 24.5], [-100.25, 24.0], [-100.35000000000002, 23.75], [-100.25, 23.5], [-100.47000000000003, 22.97], [-100.82, 22.82], [-100.85000000000002, 22.75], [-100.75, 22.5], [-100.97000000000003, 21.97], [-101.5, 21.75], [-101.75, 21.85], [-102.0, 21.75], [-102.52999999999997, 21.97], [-102.68, 22.32], [-103.02999999999997, 22.47], [-103.18, 22.82], [-103.52999999999997, 22.97], [-103.68, 23.32], [-104.03, 23.47], [-104.25, 24.0], [-104.15, 24.25], [-104.18, 24.32], [-104.53, 24.47], [-104.75, 25.0], [-104.65, 25.25], [-104.75, 25.5]]]]}, "2023-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.0, 23.75], [-102.52999999999997, 23.97], [-102.75, 24.5], [-102.52999999999997, 25.03], [-102.0, 25.25], [-101.47000000000003, 25.03], [-101.25, 24.5], [-101.47000000000003, 23.97], [-102.0, 23.75]]], [[[-103.5, 24.25], [-104.03, 24.47], [-104.25, 25.0], [-104.03, 25.53], [-103.5, 25.75], [-102.97000000000003, 25.53], [-102.75, 25.0], [-102.97000000000003, 24.47], [-103.5, 24.25]]]]}, "2023-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.52999999999997, 25.03], [-102.0, 25.25], [-101.47000000000003, 25.03], [-101.25, 24.5], [-101.47000000000003, 23.97], [-102.0, 23.75], [-102.52999999999997, 23.97], [-102.75, 24.5], [-102.52999999999997, 25.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.142678351567838}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.443548562802919}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.4185684627015, 16.588820536721755, 19.86652229376284, 21.49063163481287, 20.349090915142256]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.122411431015166, 13.371147919551106, 16.812517456997284, 20.09106307046676, 20.349090915142256]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2234185078912425, -7.177338255398394, -4.048939662347159, -3.930308027395796, -3.5889494072675348]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.07936348036128, -9.142678351567838, -5.320678590861689, -4.111191903448457, -3.5889494072675348]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.229662006384009, -3.1136601575674034, -1.812690122506375, -1.7617988854139668, -1.5476843052410911]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1447190148582775, -3.9178178158962815, -2.4309841030623045, -1.908287070878035, -1.5476843052410911]}}