{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:10.693171", "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-Aug-22_to_2012-Aug-24_245.0_36.0"}, "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": 2012080001059}, "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 22 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 24 2012"}, "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": 63227.35829315962}, "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": ["N.Central-America", "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": 36.0}, "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": 244.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 37.03], [-115.68, 37.18], [-115.53, 37.53], [-115.0, 37.75], [-114.47, 37.53], [-114.32, 37.18], [-113.97, 37.03], [-113.82, 36.68], [-113.75, 36.65], [-113.68, 36.68], [-113.53, 37.03], [-113.0, 37.25], [-112.47, 37.03], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.85, 35.75], [-112.75, 35.5], [-112.87, 35.2], [-112.47, 35.03], [-112.32, 34.68], [-112.25, 34.65], [-112.0, 34.75], [-111.75, 34.65], [-111.5, 34.75], [-110.97, 34.53], [-110.75, 34.0], [-110.97, 33.47], [-111.5, 33.25], [-111.75, 33.35], [-112.0, 33.25], [-112.25, 33.35], [-112.32, 33.32], [-112.47, 32.97], [-113.0, 32.75], [-113.25, 32.85], [-113.5, 32.75], [-113.75, 32.85], [-114.0, 32.75], [-114.53, 32.97], [-114.75, 33.5], [-114.65, 33.75], [-114.75, 34.0], [-114.65, 34.25], [-114.75, 34.5], [-114.65, 34.75], [-114.7, 34.88], [-115.0, 34.75], [-115.53, 34.97], [-115.68, 35.32], [-116.03, 35.47], [-116.25, 36.0], [-116.15, 36.25], [-116.25, 36.5], [-116.03, 37.03]]]]}, "2012-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 37.03], [-115.68, 37.18], [-115.53, 37.53], [-115.0, 37.75], [-114.47, 37.53], [-114.32, 37.18], [-113.97, 37.03], [-113.82, 36.68], [-113.75, 36.65], [-113.68, 36.68], [-113.53, 37.03], [-113.0, 37.25], [-112.47, 37.03], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.85, 35.75], [-112.75, 35.5], [-112.87, 35.2], [-112.47, 35.03], [-112.32, 34.68], [-112.25, 34.65], [-112.0, 34.75], [-111.75, 34.65], [-111.5, 34.75], [-110.97, 34.53], [-110.75, 34.0], [-110.97, 33.47], [-111.5, 33.25], [-111.75, 33.35], [-112.0, 33.25], [-112.25, 33.35], [-112.32, 33.32], [-112.47, 32.97], [-113.0, 32.75], [-113.25, 32.85], [-113.5, 32.75], [-113.75, 32.85], [-114.0, 32.75], [-114.53, 32.97], [-114.75, 33.5], [-114.65, 33.75], [-114.75, 34.0], [-114.65, 34.25], [-114.75, 34.5], [-114.65, 34.75], [-114.7, 34.88], [-115.0, 34.75], [-115.53, 34.97], [-115.68, 35.32], [-116.03, 35.47], [-116.25, 36.0], [-116.15, 36.25], [-116.25, 36.5], [-116.03, 37.03]]]]}, "2012-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 37.03], [-115.68, 37.18], [-115.53, 37.53], [-115.0, 37.75], [-114.47, 37.53], [-114.32, 37.18], [-113.97, 37.03], [-113.82, 36.68], [-113.75, 36.65], [-113.68, 36.68], [-113.53, 37.03], [-113.0, 37.25], [-112.47, 37.03], [-112.25, 36.5], [-112.47, 35.97], [-112.82, 35.82], [-112.85, 35.75], [-112.75, 35.5], [-112.87, 35.2], [-112.47, 35.03], [-112.32, 34.68], [-112.25, 34.65], [-112.0, 34.75], [-111.75, 34.65], [-111.5, 34.75], [-110.97, 34.53], [-110.75, 34.0], [-110.97, 33.47], [-111.5, 33.25], [-111.75, 33.35], [-112.0, 33.25], [-112.25, 33.35], [-112.32, 33.32], [-112.47, 32.97], [-113.0, 32.75], [-113.25, 32.85], [-113.5, 32.75], [-113.75, 32.85], [-114.0, 32.75], [-114.53, 32.97], [-114.75, 33.5], [-114.65, 33.75], [-114.75, 34.0], [-114.65, 34.25], [-114.75, 34.5], [-114.65, 34.75], [-114.7, 34.88], [-115.0, 34.75], [-115.53, 34.97], [-115.68, 35.32], [-116.03, 35.47], [-116.25, 36.0], [-116.15, 36.25], [-116.25, 36.5], [-116.03, 37.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.619786232245076}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.942523478858746}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.53242445609635, 23.355524521429004, 26.239986757455995]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.91328237568689, 18.896975747297915, 21.378138683206373]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.540871390404009, -6.628895621829972, -3.6578034243422577]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.100224000992398, -8.619786232245076, -4.542609332954726]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9050294592860453, -2.720606239129501, -1.4531255803718937]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.547531941783131, -3.669792366152557, -1.8306445890019545]}}