{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:21.350198", "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-Jan-18_to_2023-Jan-21_257.0_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": 2023010000880}, "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 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2023"}, "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": 83309.31389503024}, "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": ["Pacific Ocean"]}, "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": 257.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-103.53, 17.03], [-103.0, 17.25], [-102.75, 17.15], [-102.5, 17.25], [-102.25, 17.15], [-102.0, 17.25], [-101.75, 17.15], [-101.5, 17.25], [-101.25, 17.15], [-101.18, 17.18], [-101.03, 17.53], [-100.5, 17.75], [-100.25, 17.65], [-100.0, 17.75], [-99.47, 17.53], [-99.25, 17.0], [-99.47, 16.47], [-100.0, 16.25], [-100.25, 16.35], [-100.32, 16.32], [-100.35, 16.25], [-100.32, 16.18], [-99.97, 16.03], [-99.75, 15.5], [-99.97, 14.97], [-100.32, 14.82], [-100.47, 14.47], [-101.0, 14.25], [-101.25, 14.35], [-101.5, 14.25], [-101.75, 14.35], [-102.0, 14.25], [-102.25, 14.35], [-102.32, 14.32], [-102.47, 13.97], [-103.0, 13.75], [-103.25, 13.85], [-103.5, 13.75], [-104.03, 13.97], [-104.25, 14.5], [-104.15, 14.75], [-104.25, 15.0], [-104.15, 15.25], [-104.25, 15.5], [-104.15, 15.75], [-104.25, 16.0], [-104.03, 16.53], [-103.68, 16.68], [-103.53, 17.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America", "S.Central-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 15.0], [-104.15, 15.25], [-104.25, 15.5], [-104.15, 15.75], [-104.25, 16.0], [-104.03, 16.53], [-103.68, 16.68], [-103.52999999999997, 17.03], [-103.0, 17.25], [-102.75, 17.15], [-102.5, 17.25], [-102.25, 17.15], [-102.0, 17.25], [-101.75, 17.15], [-101.5, 17.25], [-101.25, 17.15], [-101.18, 17.18], [-101.02999999999997, 17.53], [-100.5, 17.75], [-100.25, 17.65], [-100.0, 17.75], [-99.47000000000003, 17.53], [-99.25, 17.0], [-99.47000000000003, 16.47], [-100.0, 16.25], [-100.25, 16.35], [-100.32, 16.32], [-100.35000000000002, 16.25], [-100.32, 16.18], [-99.97000000000003, 16.03], [-99.75, 15.5], [-99.97000000000003, 14.97], [-100.32, 14.82], [-100.47000000000003, 14.47], [-101.0, 14.25], [-101.25, 14.35], [-101.5, 14.25], [-101.75, 14.35], [-102.0, 14.25], [-102.25, 14.35], [-102.32, 14.32], [-102.47000000000003, 13.97], [-103.0, 13.75], [-103.25, 13.85], [-103.5, 13.75], [-104.03, 13.97], [-104.25, 14.5], [-104.15, 14.75], [-104.25, 15.0]]]]}, "2023-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 15.0], [-104.15, 15.25], [-104.25, 15.5], [-104.15, 15.75], [-104.25, 16.0], [-104.03, 16.53], [-103.68, 16.68], [-103.52999999999997, 17.03], [-103.0, 17.25], [-102.75, 17.15], [-102.5, 17.25], [-102.25, 17.15], [-102.0, 17.25], [-101.75, 17.15], [-101.5, 17.25], [-101.25, 17.15], [-101.18, 17.18], [-101.02999999999997, 17.53], [-100.5, 17.75], [-100.25, 17.65], [-100.0, 17.75], [-99.47000000000003, 17.53], [-99.25, 17.0], [-99.47000000000003, 16.47], [-100.0, 16.25], [-100.25, 16.35], [-100.32, 16.32], [-100.35000000000002, 16.25], [-100.32, 16.18], [-99.97000000000003, 16.03], [-99.75, 15.5], [-99.97000000000003, 14.97], [-100.32, 14.82], [-100.47000000000003, 14.47], [-101.0, 14.25], [-101.25, 14.35], [-101.5, 14.25], [-101.75, 14.35], [-102.0, 14.25], [-102.25, 14.35], [-102.32, 14.32], [-102.47000000000003, 13.97], [-103.0, 13.75], [-103.25, 13.85], [-103.5, 13.75], [-104.03, 13.97], [-104.25, 14.5], [-104.15, 14.75], [-104.25, 15.0]]]]}, "2023-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 15.0], [-104.15, 15.25], [-104.25, 15.5], [-104.15, 15.75], [-104.25, 16.0], [-104.03, 16.53], [-103.68, 16.68], [-103.52999999999997, 17.03], [-103.0, 17.25], [-102.75, 17.15], [-102.5, 17.25], [-102.25, 17.15], [-102.0, 17.25], [-101.75, 17.15], [-101.5, 17.25], [-101.25, 17.15], [-101.18, 17.18], [-101.02999999999997, 17.53], [-100.5, 17.75], [-100.25, 17.65], [-100.0, 17.75], [-99.47000000000003, 17.53], [-99.25, 17.0], [-99.47000000000003, 16.47], [-100.0, 16.25], [-100.25, 16.35], [-100.32, 16.32], [-100.35000000000002, 16.25], [-100.32, 16.18], [-99.97000000000003, 16.03], [-99.75, 15.5], [-99.97000000000003, 14.97], [-100.32, 14.82], [-100.47000000000003, 14.47], [-101.0, 14.25], [-101.25, 14.35], [-101.5, 14.25], [-101.75, 14.35], [-102.0, 14.25], [-102.25, 14.35], [-102.32, 14.32], [-102.47000000000003, 13.97], [-103.0, 13.75], [-103.25, 13.85], [-103.5, 13.75], [-104.03, 13.97], [-104.25, 14.5], [-104.15, 14.75], [-104.25, 15.0]]]]}, "2023-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 16.0], [-104.03, 16.53], [-103.5, 16.75], [-103.25, 16.65], [-103.0, 16.75], [-102.47000000000003, 16.53], [-102.25, 16.0], [-102.35000000000002, 15.75], [-102.25, 15.5], [-102.35000000000002, 15.25], [-102.25, 15.0], [-102.47000000000003, 14.47], [-103.0, 14.25], [-103.52999999999997, 14.47], [-103.68, 14.82], [-104.03, 14.97], [-104.25, 15.5], [-104.15, 15.75], [-104.25, 16.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7644281173289755}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2370044192300873}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.203496368573212, 25.195359110591028, 25.27710378199498, 25.27919416684267]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.085787144525796, 24.100660543221693, 23.94797468704428, 25.087909326223553]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2671230863224199, -1.2786497713154412, -1.2025124113003187, -1.0282811562417464]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7644281173289755, -1.5440855049262154, -1.4140859909799133, -1.1127741650766438]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6595728416112057, -1.6750662028713204, -1.612873128589691, -1.3824319849065996]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1346585958844457, -1.9642239846090943, -1.9355273334742018, -1.4878083139963239]}}