{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:23.988135", "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": "2020-Dec-08_to_2020-Dec-10_270.0_18.0"}, "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": 2020120000337}, "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 08 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 10 2020"}, "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": 52688.773935361096}, "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": ["Guatemala", "Mexico"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 18.0}, "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": 270.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.15, 18.25], [-91.25, 18.5], [-91.15, 18.75], [-91.25, 19.0], [-91.03, 19.53], [-90.68, 19.68], [-90.65, 19.75], [-90.75, 20.0], [-90.53, 20.53], [-90.0, 20.75], [-89.75, 20.65], [-89.5, 20.75], [-89.25, 20.65], [-89.0, 20.75], [-88.47, 20.53], [-88.25, 20.0], [-88.35, 19.75], [-88.25, 19.5], [-88.47, 18.97], [-88.82, 18.82], [-88.85, 18.75], [-88.75, 18.5], [-88.85, 18.25], [-88.75, 18.0], [-88.96, 17.5], [-88.75, 17.0], [-88.97, 16.47], [-89.5, 16.25], [-90.03, 16.47], [-90.18, 16.82], [-90.25, 16.85], [-90.5, 16.75], [-91.03, 16.97], [-91.25, 17.5], [-91.15, 17.75], [-91.25, 18.0], [-91.15, 18.25]]]]}, "2020-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.15, 18.25], [-91.25, 18.5], [-91.15, 18.75], [-91.25, 19.0], [-91.03, 19.53], [-90.68, 19.68], [-90.65, 19.75], [-90.75, 20.0], [-90.53, 20.53], [-90.0, 20.75], [-89.75, 20.65], [-89.5, 20.75], [-89.25, 20.65], [-89.0, 20.75], [-88.47, 20.53], [-88.25, 20.0], [-88.35, 19.75], [-88.25, 19.5], [-88.47, 18.97], [-88.82, 18.82], [-88.85, 18.75], [-88.75, 18.5], [-88.85, 18.25], [-88.75, 18.0], [-88.96, 17.5], [-88.75, 17.0], [-88.97, 16.47], [-89.5, 16.25], [-90.03, 16.47], [-90.18, 16.82], [-90.25, 16.85], [-90.5, 16.75], [-91.03, 16.97], [-91.25, 17.5], [-91.15, 17.75], [-91.25, 18.0], [-91.15, 18.25]]]]}, "2020-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.15, 18.25], [-91.25, 18.5], [-91.15, 18.75], [-91.25, 19.0], [-91.03, 19.53], [-90.68, 19.68], [-90.65, 19.75], [-90.75, 20.0], [-90.53, 20.53], [-90.0, 20.75], [-89.75, 20.65], [-89.5, 20.75], [-89.25, 20.65], [-89.0, 20.75], [-88.47, 20.53], [-88.25, 20.0], [-88.35, 19.75], [-88.25, 19.5], [-88.47, 18.97], [-88.82, 18.82], [-88.85, 18.75], [-88.75, 18.5], [-88.85, 18.25], [-88.75, 18.0], [-88.96, 17.5], [-88.75, 17.0], [-88.97, 16.47], [-89.5, 16.25], [-90.03, 16.47], [-90.18, 16.82], [-90.25, 16.85], [-90.5, 16.75], [-91.03, 16.97], [-91.25, 17.5], [-91.15, 17.75], [-91.25, 18.0], [-91.15, 18.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.653407229212917}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5215289322341135}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.118892204638485, 20.25436240096593, 20.452841869643862]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.51496943386013, 19.34281953918719, 19.207719789557302]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0437168507648726, -3.8771592909694954, -3.6437106549679723]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6570057294075013, -4.653407229212917, -4.543435648053617]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5548823019847802, -1.9652131161236284, -1.838361831906995]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7439208898251175, -2.309958439154909, -2.3194890512206214]}}