{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:19.557374", "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-28_to_2023-May-30_259.5_27.5"}, "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": 2023050000858}, "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 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2023"}, "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": 52209.92760477813}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 27.5}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-100.68, 29.18], [-100.53, 29.53], [-100.0, 29.75], [-99.75, 29.65], [-99.5, 29.75], [-98.97, 29.53], [-98.75, 29.0], [-98.85, 28.75], [-98.75, 28.5], [-98.96, 28.0], [-98.82, 27.68], [-98.47, 27.53], [-98.32, 27.18], [-98.25, 27.15], [-98.0, 27.25], [-97.47, 27.03], [-97.25, 26.5], [-97.46, 26.0], [-97.25, 25.5], [-97.47, 24.97], [-98.0, 24.75], [-98.53, 24.97], [-98.68, 25.32], [-98.75, 25.35], [-99.0, 25.25], [-99.53, 25.47], [-99.68, 25.82], [-99.75, 25.85], [-100.0, 25.75], [-100.53, 25.97], [-100.75, 26.5], [-100.65, 26.75], [-100.68, 26.82], [-101.03, 26.97], [-101.25, 27.5], [-101.04, 28.0], [-101.25, 28.5], [-101.03, 29.03], [-100.68, 29.18]]]]}}, "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": {"2023-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 28.5], [-101.02999999999997, 29.03], [-100.68, 29.18], [-100.52999999999997, 29.53], [-100.0, 29.75], [-99.75, 29.65], [-99.5, 29.75], [-98.97000000000003, 29.53], [-98.75, 29.0], [-98.85000000000002, 28.75], [-98.75, 28.5], [-98.95999999999998, 28.0], [-98.82, 27.68], [-98.47000000000003, 27.53], [-98.32, 27.18], [-98.25, 27.15], [-98.0, 27.25], [-97.47000000000003, 27.03], [-97.25, 26.5], [-97.45999999999998, 26.0], [-97.25, 25.5], [-97.47000000000003, 24.97], [-98.0, 24.75], [-98.52999999999997, 24.97], [-98.68, 25.32], [-98.75, 25.35], [-99.0, 25.25], [-99.52999999999997, 25.47], [-99.68, 25.82], [-99.75, 25.85], [-100.0, 25.75], [-100.52999999999997, 25.97], [-100.75, 26.5], [-100.64999999999998, 26.75], [-100.68, 26.82], [-101.02999999999997, 26.97], [-101.25, 27.5], [-101.04000000000002, 28.0], [-101.25, 28.5]]]]}, "2023-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 28.5], [-101.02999999999997, 29.03], [-100.68, 29.18], [-100.52999999999997, 29.53], [-100.0, 29.75], [-99.75, 29.65], [-99.5, 29.75], [-98.97000000000003, 29.53], [-98.75, 29.0], [-98.85000000000002, 28.75], [-98.75, 28.5], [-98.95999999999998, 28.0], [-98.82, 27.68], [-98.47000000000003, 27.53], [-98.32, 27.18], [-98.25, 27.15], [-98.0, 27.25], [-97.47000000000003, 27.03], [-97.25, 26.5], [-97.45999999999998, 26.0], [-97.25, 25.5], [-97.47000000000003, 24.97], [-98.0, 24.75], [-98.52999999999997, 24.97], [-98.68, 25.32], [-98.75, 25.35], [-99.0, 25.25], [-99.52999999999997, 25.47], [-99.68, 25.82], [-99.75, 25.85], [-100.0, 25.75], [-100.52999999999997, 25.97], [-100.75, 26.5], [-100.64999999999998, 26.75], [-100.68, 26.82], [-101.02999999999997, 26.97], [-101.25, 27.5], [-101.04000000000002, 28.0], [-101.25, 28.5]]]]}, "2023-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 28.5], [-101.02999999999997, 29.03], [-100.68, 29.18], [-100.52999999999997, 29.53], [-100.0, 29.75], [-99.75, 29.65], [-99.5, 29.75], [-98.97000000000003, 29.53], [-98.75, 29.0], [-98.85000000000002, 28.75], [-98.75, 28.5], [-98.95999999999998, 28.0], [-98.82, 27.68], [-98.47000000000003, 27.53], [-98.32, 27.18], [-98.25, 27.15], [-98.0, 27.25], [-97.47000000000003, 27.03], [-97.25, 26.5], [-97.45999999999998, 26.0], [-97.25, 25.5], [-97.47000000000003, 24.97], [-98.0, 24.75], [-98.52999999999997, 24.97], [-98.68, 25.32], [-98.75, 25.35], [-99.0, 25.25], [-99.52999999999997, 25.47], [-99.68, 25.82], [-99.75, 25.85], [-100.0, 25.75], [-100.52999999999997, 25.97], [-100.75, 26.5], [-100.64999999999998, 26.75], [-100.68, 26.82], [-101.02999999999997, 26.97], [-101.25, 27.5], [-101.04000000000002, 28.0], [-101.25, 28.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.638422609929478}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6397582471612346}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.38571098630223, 25.664287812467023, 25.694397836009728]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.97330241949345, 24.416142510889756, 23.81985702743998]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.77536962306224, -3.5617246191829692, -3.5821804992384942]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.430495796737944, -4.638422609929478, -4.337053318937365]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.678713355590104, -1.5555346327357422, -1.566269006918649]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8223093837696824, -1.7788091416120606, -1.7719042802206784]}}