{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:01:54.759785", "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": "2014-Dec-25_to_2014-Dec-27_247.5_60.5"}, "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": 2014120001090}, "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 25 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2014"}, "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": 57294.414047164064}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": 60.5}, "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": 247.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "247.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 246.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 252.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.03, 61.53], [-113.5, 61.75], [-113.25, 61.65], [-113.0, 61.75], [-112.75, 61.65], [-112.68, 61.68], [-112.53, 62.03], [-112.0, 62.25], [-111.47, 62.03], [-111.32, 61.68], [-111.2, 61.63], [-111.15, 61.75], [-111.25, 62.0], [-111.03, 62.53], [-110.5, 62.75], [-110.25, 62.65], [-110.18, 62.68], [-110.03, 63.03], [-109.5, 63.25], [-108.97, 63.03], [-108.82, 62.68], [-108.47, 62.53], [-108.32, 62.18], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-108.0, 60.25], [-108.25, 60.35], [-108.5, 60.25], [-109.03, 60.47], [-109.18, 60.82], [-109.25, 60.85], [-109.32, 60.82], [-109.35, 60.75], [-109.25, 60.5], [-109.47, 59.97], [-109.82, 59.82], [-109.97, 59.47], [-110.5, 59.25], [-110.75, 59.35], [-110.82, 59.32], [-110.97, 58.97], [-111.5, 58.75], [-111.75, 58.85], [-112.0, 58.75], [-112.25, 58.85], [-112.5, 58.75], [-112.75, 58.85], [-113.0, 58.75], [-113.53, 58.97], [-113.75, 59.5], [-113.65, 59.75], [-113.68, 59.82], [-114.03, 59.97], [-114.25, 60.5], [-114.15, 60.75], [-114.25, 61.0], [-114.03, 61.53]]]]}, "2014-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.03, 61.53], [-113.5, 61.75], [-113.25, 61.65], [-113.0, 61.75], [-112.75, 61.65], [-112.68, 61.68], [-112.53, 62.03], [-112.0, 62.25], [-111.47, 62.03], [-111.32, 61.68], [-111.2, 61.63], [-111.15, 61.75], [-111.25, 62.0], [-111.03, 62.53], [-110.5, 62.75], [-110.25, 62.65], [-110.18, 62.68], [-110.03, 63.03], [-109.5, 63.25], [-108.97, 63.03], [-108.82, 62.68], [-108.47, 62.53], [-108.32, 62.18], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-108.0, 60.25], [-108.25, 60.35], [-108.5, 60.25], [-109.03, 60.47], [-109.18, 60.82], [-109.25, 60.85], [-109.32, 60.82], [-109.35, 60.75], [-109.25, 60.5], [-109.47, 59.97], [-109.82, 59.82], [-109.97, 59.47], [-110.5, 59.25], [-110.75, 59.35], [-110.82, 59.32], [-110.97, 58.97], [-111.5, 58.75], [-111.75, 58.85], [-112.0, 58.75], [-112.25, 58.85], [-112.5, 58.75], [-112.75, 58.85], [-113.0, 58.75], [-113.53, 58.97], [-113.75, 59.5], [-113.65, 59.75], [-113.68, 59.82], [-114.03, 59.97], [-114.25, 60.5], [-114.15, 60.75], [-114.25, 61.0], [-114.03, 61.53]]]]}, "2014-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.03, 61.53], [-113.5, 61.75], [-113.25, 61.65], [-113.0, 61.75], [-112.75, 61.65], [-112.68, 61.68], [-112.53, 62.03], [-112.0, 62.25], [-111.47, 62.03], [-111.32, 61.68], [-111.2, 61.63], [-111.15, 61.75], [-111.25, 62.0], [-111.03, 62.53], [-110.5, 62.75], [-110.25, 62.65], [-110.18, 62.68], [-110.03, 63.03], [-109.5, 63.25], [-108.97, 63.03], [-108.82, 62.68], [-108.47, 62.53], [-108.32, 62.18], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-108.0, 60.25], [-108.25, 60.35], [-108.5, 60.25], [-109.03, 60.47], [-109.18, 60.82], [-109.25, 60.85], [-109.32, 60.82], [-109.35, 60.75], [-109.25, 60.5], [-109.47, 59.97], [-109.82, 59.82], [-109.97, 59.47], [-110.5, 59.25], [-110.75, 59.35], [-110.82, 59.32], [-110.97, 58.97], [-111.5, 58.75], [-111.75, 58.85], [-112.0, 58.75], [-112.25, 58.85], [-112.5, 58.75], [-112.75, 58.85], [-113.0, 58.75], [-113.53, 58.97], [-113.75, 59.5], [-113.65, 59.75], [-113.68, 59.82], [-114.03, 59.97], [-114.25, 60.5], [-114.15, 60.75], [-114.25, 61.0], [-114.03, 61.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -20.462028083405272}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -14.203849088363683}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-33.89703551598345, -37.53052409817835, -34.26060913345876]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-37.154202011134174, -41.1835246905969, -37.51503491528197]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-13.264514806218296, -16.542515573382058, -12.804516885490676]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-14.740660203071684, -20.462028083405272, -14.450297395118014]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.542651624324714, -1.9181509629704048, -1.4823231684784723]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.752235075111226, -2.451013341067295, -1.6791687326684168]}}