{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:49.565333", "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": "2024-May-17_to_2024-May-19_245.0_57.0"}, "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": 2024050000408}, "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": "May 17 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 19 2024"}, "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": 81811.65407924337}, "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": 57.0}, "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": 242.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.15, 57.75], [-118.25, 58.0], [-118.03, 58.53], [-117.5, 58.75], [-116.97, 58.53], [-116.82, 58.18], [-116.75, 58.15], [-116.5, 58.25], [-116.25, 58.15], [-116.18, 58.18], [-116.03, 58.53], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.5, 58.75], [-113.97, 58.53], [-113.82, 58.18], [-113.75, 58.15], [-113.5, 58.25], [-112.97, 58.03], [-112.82, 57.68], [-112.75, 57.65], [-112.5, 57.75], [-112.25, 57.65], [-112.0, 57.75], [-111.47, 57.53], [-111.25, 57.0], [-111.47, 56.47], [-112.0, 56.25], [-112.25, 56.35], [-112.5, 56.25], [-112.75, 56.35], [-113.0, 56.25], [-113.25, 56.35], [-113.32, 56.32], [-113.46, 56.0], [-113.25, 55.5], [-113.47, 54.97], [-114.0, 54.75], [-114.25, 54.85], [-114.32, 54.82], [-114.47, 54.47], [-115.0, 54.25], [-115.25, 54.35], [-115.32, 54.32], [-115.47, 53.97], [-116.0, 53.75], [-116.25, 53.85], [-116.5, 53.75], [-116.75, 53.85], [-117.0, 53.75], [-117.53, 53.97], [-117.75, 54.5], [-117.65, 54.75], [-117.75, 55.0], [-117.65, 55.25], [-117.75, 55.5], [-117.65, 55.75], [-117.75, 56.0], [-117.65, 56.25], [-117.68, 56.32], [-118.03, 56.47], [-118.25, 57.0], [-118.15, 57.25], [-118.25, 57.5], [-118.15, 57.75]]]]}, "2024-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.15, 57.75], [-118.25, 58.0], [-118.03, 58.53], [-117.5, 58.75], [-116.97, 58.53], [-116.82, 58.18], [-116.75, 58.15], [-116.5, 58.25], [-116.25, 58.15], [-116.18, 58.18], [-116.03, 58.53], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.5, 58.75], [-113.97, 58.53], [-113.82, 58.18], [-113.75, 58.15], [-113.5, 58.25], [-112.97, 58.03], [-112.82, 57.68], [-112.75, 57.65], [-112.5, 57.75], [-112.25, 57.65], [-112.0, 57.75], [-111.47, 57.53], [-111.25, 57.0], [-111.47, 56.47], [-112.0, 56.25], [-112.25, 56.35], [-112.5, 56.25], [-112.75, 56.35], [-113.0, 56.25], [-113.25, 56.35], [-113.32, 56.32], [-113.46, 56.0], [-113.25, 55.5], [-113.47, 54.97], [-114.0, 54.75], [-114.25, 54.85], [-114.32, 54.82], [-114.47, 54.47], [-115.0, 54.25], [-115.25, 54.35], [-115.32, 54.32], [-115.47, 53.97], [-116.0, 53.75], [-116.25, 53.85], [-116.5, 53.75], [-116.75, 53.85], [-117.0, 53.75], [-117.53, 53.97], [-117.75, 54.5], [-117.65, 54.75], [-117.75, 55.0], [-117.65, 55.25], [-117.75, 55.5], [-117.65, 55.75], [-117.75, 56.0], [-117.65, 56.25], [-117.68, 56.32], [-118.03, 56.47], [-118.25, 57.0], [-118.15, 57.25], [-118.25, 57.5], [-118.15, 57.75]]]]}, "2024-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.15, 57.75], [-118.25, 58.0], [-118.03, 58.53], [-117.5, 58.75], [-116.97, 58.53], [-116.82, 58.18], [-116.75, 58.15], [-116.5, 58.25], [-116.25, 58.15], [-116.18, 58.18], [-116.03, 58.53], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.5, 58.75], [-113.97, 58.53], [-113.82, 58.18], [-113.75, 58.15], [-113.5, 58.25], [-112.97, 58.03], [-112.82, 57.68], [-112.75, 57.65], [-112.5, 57.75], [-112.25, 57.65], [-112.0, 57.75], [-111.47, 57.53], [-111.25, 57.0], [-111.47, 56.47], [-112.0, 56.25], [-112.25, 56.35], [-112.5, 56.25], [-112.75, 56.35], [-113.0, 56.25], [-113.25, 56.35], [-113.32, 56.32], [-113.46, 56.0], [-113.25, 55.5], [-113.47, 54.97], [-114.0, 54.75], [-114.25, 54.85], [-114.32, 54.82], [-114.47, 54.47], [-115.0, 54.25], [-115.25, 54.35], [-115.32, 54.32], [-115.47, 53.97], [-116.0, 53.75], [-116.25, 53.85], [-116.5, 53.75], [-116.75, 53.85], [-117.0, 53.75], [-117.53, 53.97], [-117.75, 54.5], [-117.65, 54.75], [-117.75, 55.0], [-117.65, 55.25], [-117.75, 55.5], [-117.65, 55.75], [-117.75, 56.0], [-117.65, 56.25], [-117.68, 56.32], [-118.03, 56.47], [-118.25, 57.0], [-118.15, 57.25], [-118.25, 57.5], [-118.15, 57.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.236948512420383}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.021850131750917}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.8706093702037947, 3.1064269587596414, 4.26348039291878]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.8547976420039731, 0.48108055782194015, 2.7845411627190515]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.402255476691991, -7.3407850314699195, -6.322509887090837]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.937907136311537, -9.236948512420383, -7.229824820205806]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.71373725194825, -1.7306454726790974, -1.5339960647778026]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.017955773229684, -2.064597191252885, -1.7625626532725611]}}