{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:56.967694", "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": "2013-Jul-27_to_2013-Jul-30_245.0_37.0"}, "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": 2013070001396}, "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": "July 27 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 30 2013"}, "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": 88884.33667666369}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-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": 37.0}, "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": 245.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "245.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 241.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 247.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.25, 37.0], [-119.03, 37.53], [-118.68, 37.68], [-118.53, 38.03], [-118.0, 38.25], [-117.75, 38.15], [-117.5, 38.25], [-117.25, 38.15], [-117.0, 38.25], [-116.75, 38.15], [-116.5, 38.25], [-116.25, 38.15], [-116.0, 38.25], [-115.75, 38.15], [-115.68, 38.18], [-115.53, 38.53], [-115.0, 38.75], [-114.47, 38.53], [-114.32, 38.18], [-114.25, 38.15], [-114.0, 38.25], [-113.75, 38.15], [-113.5, 38.25], [-113.25, 38.15], [-113.0, 38.25], [-112.47, 38.03], [-112.25, 37.5], [-112.35, 37.25], [-112.25, 37.0], [-112.35, 36.75], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.97, 35.47], [-113.5, 35.25], [-113.75, 35.35], [-114.0, 35.25], [-114.53, 35.47], [-114.68, 35.82], [-114.75, 35.85], [-115.0, 35.75], [-115.25, 35.85], [-115.5, 35.75], [-115.75, 35.85], [-116.0, 35.75], [-116.5, 35.96], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.68, 36.32], [-119.03, 36.47], [-119.25, 37.0]]]]}, "2013-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.25, 37.0], [-119.03, 37.53], [-118.68, 37.68], [-118.53, 38.03], [-118.0, 38.25], [-117.75, 38.15], [-117.5, 38.25], [-117.25, 38.15], [-117.0, 38.25], [-116.75, 38.15], [-116.5, 38.25], [-116.25, 38.15], [-116.0, 38.25], [-115.75, 38.15], [-115.68, 38.18], [-115.53, 38.53], [-115.0, 38.75], [-114.47, 38.53], [-114.32, 38.18], [-114.25, 38.15], [-114.0, 38.25], [-113.75, 38.15], [-113.5, 38.25], [-113.25, 38.15], [-113.0, 38.25], [-112.47, 38.03], [-112.25, 37.5], [-112.35, 37.25], [-112.25, 37.0], [-112.35, 36.75], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.97, 35.47], [-113.5, 35.25], [-113.75, 35.35], [-114.0, 35.25], [-114.53, 35.47], [-114.68, 35.82], [-114.75, 35.85], [-115.0, 35.75], [-115.25, 35.85], [-115.5, 35.75], [-115.75, 35.85], [-116.0, 35.75], [-116.5, 35.96], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.68, 36.32], [-119.03, 36.47], [-119.25, 37.0]]]]}, "2013-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.25, 37.0], [-119.03, 37.53], [-118.68, 37.68], [-118.53, 38.03], [-118.0, 38.25], [-117.75, 38.15], [-117.5, 38.25], [-117.25, 38.15], [-117.0, 38.25], [-116.75, 38.15], [-116.5, 38.25], [-116.25, 38.15], [-116.0, 38.25], [-115.75, 38.15], [-115.68, 38.18], [-115.53, 38.53], [-115.0, 38.75], [-114.47, 38.53], [-114.32, 38.18], [-114.25, 38.15], [-114.0, 38.25], [-113.75, 38.15], [-113.5, 38.25], [-113.25, 38.15], [-113.0, 38.25], [-112.47, 38.03], [-112.25, 37.5], [-112.35, 37.25], [-112.25, 37.0], [-112.35, 36.75], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.97, 35.47], [-113.5, 35.25], [-113.75, 35.35], [-114.0, 35.25], [-114.53, 35.47], [-114.68, 35.82], [-114.75, 35.85], [-115.0, 35.75], [-115.25, 35.85], [-115.5, 35.75], [-115.75, 35.85], [-116.0, 35.75], [-116.5, 35.96], [-117.0, 35.75], [-117.25, 35.85], [-117.5, 35.75], [-117.75, 35.85], [-118.0, 35.75], [-118.53, 35.97], [-118.68, 36.32], [-119.03, 36.47], [-119.25, 37.0]]]]}, "2013-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 37.53], [-115.5, 37.75], [-115.25, 37.65], [-115.0, 37.75], [-114.47, 37.53], [-114.25, 37.0], [-114.47, 36.47], [-114.82, 36.32], [-114.97, 35.97], [-115.5, 35.75], [-116.03, 35.97], [-116.25, 36.5], [-116.15, 36.75], [-116.25, 37.0], [-116.03, 37.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.830034812357667}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.489211041739374}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.305565839067185, 23.455505174361747, 23.087639923441543, 25.917155214631805]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.911797352463964, 14.635099143177342, 14.67514314980042, 23.692684062646777]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.83210652014414, -4.691492591056157, -5.042191969635945, -3.3113155743219145]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.037550532956175, -6.830034812357667, -6.701241756040531, -3.4306594455077857]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7326631431218598, -2.1698725627446227, -2.3351155359705094, -1.4377912185030528]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.319729211212601, -3.023697388500132, -3.2175654949873858, -1.522932660709595]}}