{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:36.029727", "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": "2015-Aug-07_to_2015-Aug-09_244.0_38.5"}, "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": 2015080000377}, "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": "August 07 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2015"}, "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": 90106.8460156935}, "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": 38.5}, "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": 244.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "244.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 241.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 246.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.75, 39.0], [-118.53, 39.53], [-118.0, 39.75], [-117.75, 39.65], [-117.68, 39.68], [-117.53, 40.03], [-117.18, 40.18], [-117.03, 40.53], [-116.5, 40.75], [-115.97, 40.53], [-115.82, 40.18], [-115.47, 40.03], [-115.32, 39.68], [-115.25, 39.65], [-115.0, 39.75], [-114.47, 39.53], [-114.32, 39.18], [-113.97, 39.03], [-113.82, 38.68], [-113.47, 38.53], [-113.25, 38.0], [-113.35, 37.75], [-113.32, 37.68], [-112.97, 37.53], [-112.75, 37.0], [-112.85, 36.75], [-112.75, 36.5], [-112.85, 36.25], [-112.75, 36.0], [-112.97, 35.47], [-113.32, 35.32], [-113.47, 34.97], [-114.0, 34.75], [-114.53, 34.97], [-114.68, 35.32], [-115.03, 35.47], [-115.25, 36.0], [-115.15, 36.25], [-115.25, 36.5], [-115.15, 36.75], [-115.25, 37.0], [-115.15, 37.25], [-115.18, 37.32], [-115.25, 37.35], [-115.5, 37.25], [-115.75, 37.35], [-116.0, 37.25], [-116.25, 37.35], [-116.5, 37.25], [-116.75, 37.35], [-117.0, 37.25], [-117.53, 37.47], [-117.68, 37.82], [-118.03, 37.97], [-118.18, 38.32], [-118.53, 38.47], [-118.75, 39.0]]]]}, "2015-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.75, 39.0], [-118.53, 39.53], [-118.0, 39.75], [-117.75, 39.65], [-117.68, 39.68], [-117.53, 40.03], [-117.18, 40.18], [-117.03, 40.53], [-116.5, 40.75], [-115.97, 40.53], [-115.82, 40.18], [-115.47, 40.03], [-115.32, 39.68], [-115.25, 39.65], [-115.0, 39.75], [-114.47, 39.53], [-114.32, 39.18], [-113.97, 39.03], [-113.82, 38.68], [-113.47, 38.53], [-113.25, 38.0], [-113.35, 37.75], [-113.32, 37.68], [-112.97, 37.53], [-112.75, 37.0], [-112.85, 36.75], [-112.75, 36.5], [-112.85, 36.25], [-112.75, 36.0], [-112.97, 35.47], [-113.32, 35.32], [-113.47, 34.97], [-114.0, 34.75], [-114.53, 34.97], [-114.68, 35.32], [-115.03, 35.47], [-115.25, 36.0], [-115.15, 36.25], [-115.25, 36.5], [-115.15, 36.75], [-115.25, 37.0], [-115.15, 37.25], [-115.18, 37.32], [-115.25, 37.35], [-115.5, 37.25], [-115.75, 37.35], [-116.0, 37.25], [-116.25, 37.35], [-116.5, 37.25], [-116.75, 37.35], [-117.0, 37.25], [-117.53, 37.47], [-117.68, 37.82], [-118.03, 37.97], [-118.18, 38.32], [-118.53, 38.47], [-118.75, 39.0]]]]}, "2015-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.75, 39.0], [-118.53, 39.53], [-118.0, 39.75], [-117.75, 39.65], [-117.68, 39.68], [-117.53, 40.03], [-117.18, 40.18], [-117.03, 40.53], [-116.5, 40.75], [-115.97, 40.53], [-115.82, 40.18], [-115.47, 40.03], [-115.32, 39.68], [-115.25, 39.65], [-115.0, 39.75], [-114.47, 39.53], [-114.32, 39.18], [-113.97, 39.03], [-113.82, 38.68], [-113.47, 38.53], [-113.25, 38.0], [-113.35, 37.75], [-113.32, 37.68], [-112.97, 37.53], [-112.75, 37.0], [-112.85, 36.75], [-112.75, 36.5], [-112.85, 36.25], [-112.75, 36.0], [-112.97, 35.47], [-113.32, 35.32], [-113.47, 34.97], [-114.0, 34.75], [-114.53, 34.97], [-114.68, 35.32], [-115.03, 35.47], [-115.25, 36.0], [-115.15, 36.25], [-115.25, 36.5], [-115.15, 36.75], [-115.25, 37.0], [-115.15, 37.25], [-115.18, 37.32], [-115.25, 37.35], [-115.5, 37.25], [-115.75, 37.35], [-116.0, 37.25], [-116.25, 37.35], [-116.5, 37.25], [-116.75, 37.35], [-117.0, 37.25], [-117.53, 37.47], [-117.68, 37.82], [-118.03, 37.97], [-118.18, 38.32], [-118.53, 38.47], [-118.75, 39.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.250566369409057}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.948492383525993}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.508178151934942, 18.592482414051346, 21.234894835309206]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.35282262031683, 12.305815112077994, 16.110039056828043]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.951355749407303, -6.787860953846251, -4.106260447324431]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.376355347973288, -9.250566369409057, -5.661387983490613]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6494816956395078, -2.756876649368905, -1.6784688916248847]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2001754393635733, -3.4303931216811008, -2.1551080189102594]}}