{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:27.057670", "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": "2012-Sep-27_to_2012-Oct-02_253.0_30.0"}, "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": 2012090001008}, "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": "September 27 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 50791.2888869786}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": 30.0}, "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": 253.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "253.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 250.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.75, 29.5], [-109.53, 30.03], [-109.0, 30.25], [-108.75, 30.15], [-108.68, 30.18], [-108.53, 30.53], [-108.0, 30.75], [-107.47, 30.53], [-107.25, 30.0], [-107.35, 29.75], [-107.25, 29.5], [-107.35, 29.25], [-107.25, 29.0], [-107.47, 28.47], [-108.0, 28.25], [-108.25, 28.35], [-108.5, 28.25], [-109.03, 28.47], [-109.18, 28.82], [-109.53, 28.97], [-109.75, 29.5]]]]}, "2012-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.75, 29.5], [-109.53, 30.03], [-109.0, 30.25], [-108.75, 30.15], [-108.68, 30.18], [-108.65, 30.25], [-108.75, 30.5], [-108.65, 30.75], [-108.75, 31.0], [-108.53, 31.53], [-108.0, 31.75], [-107.75, 31.65], [-107.5, 31.75], [-107.25, 31.65], [-107.0, 31.75], [-106.75, 31.65], [-106.5, 31.75], [-105.97, 31.53], [-105.82, 31.18], [-105.47, 31.03], [-105.25, 30.5], [-105.46, 30.0], [-105.25, 29.5], [-105.47, 28.97], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.25, 29.35], [-107.32, 29.32], [-107.35, 29.25], [-107.25, 29.0], [-107.47, 28.47], [-108.0, 28.25], [-108.25, 28.35], [-108.5, 28.25], [-109.03, 28.47], [-109.18, 28.82], [-109.53, 28.97], [-109.75, 29.5]]]]}, "2012-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.75, 29.5], [-109.53, 30.03], [-109.0, 30.25], [-108.75, 30.15], [-108.68, 30.18], [-108.65, 30.25], [-108.75, 30.5], [-108.65, 30.75], [-108.75, 31.0], [-108.53, 31.53], [-108.0, 31.75], [-107.75, 31.65], [-107.5, 31.75], [-107.25, 31.65], [-107.0, 31.75], [-106.75, 31.65], [-106.5, 31.75], [-105.97, 31.53], [-105.82, 31.18], [-105.47, 31.03], [-105.25, 30.5], [-105.46, 30.0], [-105.25, 29.5], [-105.47, 28.97], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.25, 29.35], [-107.32, 29.32], [-107.35, 29.25], [-107.25, 29.0], [-107.47, 28.47], [-108.0, 28.25], [-108.25, 28.35], [-108.5, 28.25], [-109.03, 28.47], [-109.18, 28.82], [-109.53, 28.97], [-109.75, 29.5]]]]}, "2012-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 31.53], [-108.0, 31.75], [-107.75, 31.65], [-107.5, 31.75], [-107.25, 31.65], [-107.0, 31.75], [-106.75, 31.65], [-106.5, 31.75], [-105.97, 31.53], [-105.82, 31.18], [-105.47, 31.03], [-105.25, 30.5], [-105.46, 30.0], [-105.25, 29.5], [-105.47, 28.97], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.25, 29.35], [-107.5, 29.25], [-108.03, 29.47], [-108.18, 29.82], [-108.53, 29.97], [-108.75, 30.5], [-108.65, 30.75], [-108.75, 31.0], [-108.53, 31.53]]]]}, "2012-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.25, 30.5], [-108.03, 31.03], [-107.5, 31.25], [-107.25, 31.15], [-107.0, 31.25], [-106.47, 31.03], [-106.25, 30.5], [-106.35, 30.25], [-106.25, 30.0], [-106.47, 29.47], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.25, 30.5]]]]}, "2012-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.25, 30.5], [-108.03, 31.03], [-107.5, 31.25], [-107.25, 31.15], [-107.0, 31.25], [-106.47, 31.03], [-106.25, 30.5], [-106.35, 30.25], [-106.25, 30.0], [-106.47, 29.47], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.25, 30.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.068317139873329}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.71239650523573}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.30972640501318, 17.8266565776226, 16.824390543452523, 18.83680092052134, 19.26091590106131, 19.590864401135093]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.46765391489049, 13.431084892954402, 13.20185956033049, 17.323780247961906, 18.50259399805236, 19.0347454506051]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.542361912874289, -3.5391538163704492, -4.470681162027392, -3.6617069865752683, -3.3265375116639198, -2.9527134675253515]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.731193629146219, -4.584977688409026, -6.068317139873329, -4.269495564004956, -3.5510967168648335, -3.2001844615726327]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7033954967284644, -1.7121138639053328, -2.061382871633454, -1.6111545644445653, -1.5829467462394133, -1.447290835889775]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8428343341658169, -2.3954470882418133, -2.4693407626206247, -1.8926536628625856, -1.6993390016691816, -1.4841053100509558]}}