{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:45.907618", "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": "2025-Mar-09_to_2025-Mar-11_248.5_60.0"}, "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": 2025030000260}, "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": "March 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 11 2025"}, "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": 64440.62150947941}, "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": 60.0}, "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": 248.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "248.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.75}, "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": 58.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.75, 60.0], [-115.53, 60.53], [-115.18, 60.68], [-115.03, 61.03], [-114.5, 61.25], [-114.0, 61.04], [-113.5, 61.25], [-113.25, 61.15], [-113.0, 61.25], [-112.75, 61.15], [-112.68, 61.18], [-112.53, 61.53], [-112.0, 61.75], [-111.75, 61.65], [-111.5, 61.75], [-111.25, 61.65], [-111.0, 61.75], [-110.5, 61.54], [-110.0, 61.75], [-109.75, 61.65], [-109.68, 61.68], [-109.53, 62.03], [-109.0, 62.25], [-108.75, 62.15], [-108.5, 62.25], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-107.82, 60.32], [-107.97, 59.97], [-108.5, 59.75], [-108.75, 59.85], [-109.0, 59.75], [-109.25, 59.85], [-109.5, 59.75], [-109.75, 59.85], [-109.82, 59.82], [-109.97, 59.47], [-110.32, 59.32], [-110.47, 58.97], [-110.82, 58.82], [-110.97, 58.47], [-111.5, 58.25], [-111.75, 58.35], [-112.0, 58.25], [-112.25, 58.35], [-112.5, 58.25], [-113.03, 58.47], [-113.18, 58.82], [-113.25, 58.85], [-113.5, 58.75], [-113.75, 58.85], [-114.0, 58.75], [-114.25, 58.85], [-114.5, 58.75], [-115.03, 58.97], [-115.18, 59.32], [-115.53, 59.47], [-115.75, 60.0]]]]}, "2025-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.75, 60.0], [-115.53, 60.53], [-115.18, 60.68], [-115.03, 61.03], [-114.5, 61.25], [-114.0, 61.04], [-113.5, 61.25], [-113.25, 61.15], [-113.0, 61.25], [-112.75, 61.15], [-112.68, 61.18], [-112.53, 61.53], [-112.0, 61.75], [-111.75, 61.65], [-111.5, 61.75], [-111.25, 61.65], [-111.0, 61.75], [-110.5, 61.54], [-110.0, 61.75], [-109.75, 61.65], [-109.68, 61.68], [-109.53, 62.03], [-109.0, 62.25], [-108.75, 62.15], [-108.5, 62.25], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-107.82, 60.32], [-107.97, 59.97], [-108.5, 59.75], [-108.75, 59.85], [-109.0, 59.75], [-109.25, 59.85], [-109.5, 59.75], [-109.75, 59.85], [-109.82, 59.82], [-109.97, 59.47], [-110.32, 59.32], [-110.47, 58.97], [-110.82, 58.82], [-110.97, 58.47], [-111.5, 58.25], [-111.75, 58.35], [-112.0, 58.25], [-112.25, 58.35], [-112.5, 58.25], [-113.03, 58.47], [-113.18, 58.82], [-113.25, 58.85], [-113.5, 58.75], [-113.75, 58.85], [-114.0, 58.75], [-114.25, 58.85], [-114.5, 58.75], [-115.03, 58.97], [-115.18, 59.32], [-115.53, 59.47], [-115.75, 60.0]]]]}, "2025-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.75, 60.0], [-115.53, 60.53], [-115.18, 60.68], [-115.03, 61.03], [-114.5, 61.25], [-114.0, 61.04], [-113.5, 61.25], [-113.25, 61.15], [-113.0, 61.25], [-112.75, 61.15], [-112.68, 61.18], [-112.53, 61.53], [-112.0, 61.75], [-111.75, 61.65], [-111.5, 61.75], [-111.25, 61.65], [-111.0, 61.75], [-110.5, 61.54], [-110.0, 61.75], [-109.75, 61.65], [-109.68, 61.68], [-109.53, 62.03], [-109.0, 62.25], [-108.75, 62.15], [-108.5, 62.25], [-107.97, 62.03], [-107.82, 61.68], [-107.47, 61.53], [-107.25, 61.0], [-107.47, 60.47], [-107.82, 60.32], [-107.97, 59.97], [-108.5, 59.75], [-108.75, 59.85], [-109.0, 59.75], [-109.25, 59.85], [-109.5, 59.75], [-109.75, 59.85], [-109.82, 59.82], [-109.97, 59.47], [-110.32, 59.32], [-110.47, 58.97], [-110.82, 58.82], [-110.97, 58.47], [-111.5, 58.25], [-111.75, 58.35], [-112.0, 58.25], [-112.25, 58.35], [-112.5, 58.25], [-113.03, 58.47], [-113.18, 58.82], [-113.25, 58.85], [-113.5, 58.75], [-113.75, 58.85], [-114.0, 58.75], [-114.25, 58.85], [-114.5, 58.75], [-115.03, 58.97], [-115.18, 59.32], [-115.53, 59.47], [-115.75, 60.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.434559357595106}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.972479302928278}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.77004864405066, -27.81253731742737, -27.09446380554678]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.057760620117165, -32.368238194783515, -30.565488560994453]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.189218362691458, -12.540902922756091, -12.187316623337285]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.862094361774922, -13.434559357595106, -13.085440285197109]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.336759241616831, -1.5173762171783238, -1.509290681378207]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4157330189273403, -1.6318555213378994, -1.6372677590891902]}}