{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:16.112118", "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": "2010-Mar-22_to_2010-Mar-25_247.0_61.0"}, "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": 2010030000689}, "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 22 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 25 2010"}, "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": 55304.15087441138}, "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": 61.0}, "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": 247.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "247.0\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": 250.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 62.47], [-116.25, 63.0], [-116.03, 63.53], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.68, 63.68], [-114.53, 64.03], [-114.0, 64.25], [-113.75, 64.15], [-113.5, 64.25], [-113.25, 64.15], [-113.0, 64.25], [-112.47, 64.03], [-112.3, 63.63], [-112.0, 63.75], [-111.75, 63.65], [-111.5, 63.75], [-110.97, 63.53], [-110.75, 63.0], [-110.87, 62.7], [-110.47, 62.53], [-110.25, 62.0], [-110.35, 61.75], [-110.25, 61.5], [-110.35, 61.25], [-110.32, 61.18], [-110.25, 61.15], [-110.0, 61.25], [-109.47, 61.03], [-109.25, 60.5], [-109.47, 59.97], [-110.0, 59.75], [-110.25, 59.85], [-110.32, 59.82], [-110.47, 59.47], [-111.0, 59.25], [-111.53, 59.47], [-111.75, 60.0], [-111.65, 60.25], [-111.68, 60.32], [-111.75, 60.35], [-112.0, 60.25], [-112.25, 60.35], [-112.5, 60.25], [-112.75, 60.35], [-113.0, 60.25], [-113.25, 60.35], [-113.5, 60.25], [-113.75, 60.35], [-114.0, 60.25], [-114.53, 60.47], [-114.75, 61.0], [-114.53, 61.53], [-114.0, 61.75], [-114.25, 61.85], [-114.5, 61.75], [-115.03, 61.97], [-115.18, 62.32], [-115.25, 62.35], [-115.5, 62.25], [-116.03, 62.47]], [[-113.75, 61.65], [-113.68, 61.68], [-113.62, 61.8], [-113.75, 61.85], [-114.0, 61.75], [-113.75, 61.65]]]]}, "2010-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 62.47], [-116.25, 63.0], [-116.03, 63.53], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.68, 63.68], [-114.53, 64.03], [-114.0, 64.25], [-113.75, 64.15], [-113.5, 64.25], [-113.25, 64.15], [-113.0, 64.25], [-112.47, 64.03], [-112.3, 63.63], [-112.0, 63.75], [-111.75, 63.65], [-111.5, 63.75], [-110.97, 63.53], [-110.75, 63.0], [-110.87, 62.7], [-110.47, 62.53], [-110.25, 62.0], [-110.35, 61.75], [-110.25, 61.5], [-110.35, 61.25], [-110.32, 61.18], [-110.25, 61.15], [-110.0, 61.25], [-109.47, 61.03], [-109.25, 60.5], [-109.47, 59.97], [-110.0, 59.75], [-110.25, 59.85], [-110.32, 59.82], [-110.47, 59.47], [-111.0, 59.25], [-111.53, 59.47], [-111.75, 60.0], [-111.65, 60.25], [-111.68, 60.32], [-111.75, 60.35], [-112.0, 60.25], [-112.25, 60.35], [-112.5, 60.25], [-112.75, 60.35], [-113.0, 60.25], [-113.25, 60.35], [-113.5, 60.25], [-113.75, 60.35], [-114.0, 60.25], [-114.53, 60.47], [-114.75, 61.0], [-114.62, 61.3], [-115.03, 61.47], [-115.25, 62.0], [-115.15, 62.25], [-115.18, 62.32], [-115.25, 62.35], [-115.5, 62.25], [-116.03, 62.47]]]]}, "2010-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 62.47], [-116.25, 63.0], [-116.03, 63.53], [-115.5, 63.75], [-115.25, 63.65], [-115.0, 63.75], [-114.75, 63.65], [-114.68, 63.68], [-114.53, 64.03], [-114.0, 64.25], [-113.75, 64.15], [-113.5, 64.25], [-113.25, 64.15], [-113.0, 64.25], [-112.47, 64.03], [-112.3, 63.63], [-112.0, 63.75], [-111.75, 63.65], [-111.5, 63.75], [-110.97, 63.53], [-110.75, 63.0], [-110.87, 62.7], [-110.47, 62.53], [-110.25, 62.0], [-110.35, 61.75], [-110.25, 61.5], [-110.35, 61.25], [-110.32, 61.18], [-110.25, 61.15], [-110.0, 61.25], [-109.47, 61.03], [-109.25, 60.5], [-109.47, 59.97], [-110.0, 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[-113.75, 61.35], [-114.0, 61.25], [-114.25, 61.35], [-114.5, 61.25], [-115.03, 61.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.121648450958958}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.321776979244579}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.376036072359426, -23.769486079622283, -25.578884549293548, -21.104705764258]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.591149230612018, -27.369061255578032, -28.985149164080298, -21.686034178285468]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.231289336478717, -10.838359905291725, -13.153006746396942, -8.601564017065604]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.692340739529044, -13.661451938757011, -15.121648450958958, -8.964232819511835]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3306818659647708, -1.4320205017156167, -1.7611136740926028, -1.2993419676466693]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4708769972137137, -1.7276245183806538, -2.0698567582302467, -1.3217627240874052]}}