{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:51.672007", "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": "2018-Jan-10_to_2018-Jan-12_242.5_54.5"}, "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": 2018010000477}, "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": "January 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2018"}, "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": 50867.360260955815}, "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": 54.5}, "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": 242.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "242.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 240.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 245.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.68, 55.18], [-118.53, 55.53], [-118.0, 55.75], [-117.75, 55.65], [-117.5, 55.75], [-117.25, 55.65], [-117.0, 55.75], [-116.75, 55.65], [-116.5, 55.75], [-116.25, 55.65], [-116.0, 55.75], [-115.75, 55.65], [-115.5, 55.75], [-114.97, 55.53], [-114.75, 55.0], [-114.85, 54.75], [-114.75, 54.5], [-114.97, 53.97], [-115.5, 53.75], [-115.75, 53.85], [-115.82, 53.82], [-115.87, 53.7], [-115.47, 53.53], [-115.32, 53.18], [-114.97, 53.03], [-114.82, 52.68], [-114.47, 52.53], [-114.25, 52.0], [-114.47, 51.47], [-115.0, 51.25], [-115.53, 51.47], [-115.68, 51.82], [-115.75, 51.85], [-116.0, 51.75], [-116.53, 51.97], [-116.68, 52.32], [-116.75, 52.35], [-117.0, 52.25], [-117.53, 52.47], [-117.68, 52.82], [-117.75, 52.85], [-118.0, 52.75], [-118.53, 52.97], [-118.68, 53.32], [-118.75, 53.35], [-119.0, 53.25], [-119.53, 53.47], [-119.75, 54.0], [-119.53, 54.53], [-119.18, 54.68], [-119.03, 55.03], [-118.68, 55.18]]]]}, "2018-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.68, 55.18], [-118.53, 55.53], [-118.0, 55.75], [-117.75, 55.65], [-117.5, 55.75], [-117.25, 55.65], [-117.0, 55.75], [-116.75, 55.65], [-116.5, 55.75], [-116.25, 55.65], [-116.0, 55.75], [-115.75, 55.65], [-115.5, 55.75], [-114.97, 55.53], [-114.75, 55.0], [-114.85, 54.75], [-114.75, 54.5], [-114.97, 53.97], [-115.5, 53.75], [-115.75, 53.85], [-115.82, 53.82], [-115.87, 53.7], [-115.47, 53.53], [-115.32, 53.18], [-114.97, 53.03], [-114.82, 52.68], [-114.47, 52.53], [-114.25, 52.0], [-114.47, 51.47], [-115.0, 51.25], [-115.53, 51.47], [-115.68, 51.82], [-115.75, 51.85], [-116.0, 51.75], [-116.53, 51.97], [-116.68, 52.32], [-116.75, 52.35], [-117.0, 52.25], [-117.53, 52.47], [-117.68, 52.82], [-117.75, 52.85], [-118.0, 52.75], [-118.53, 52.97], [-118.68, 53.32], [-118.75, 53.35], [-119.0, 53.25], [-119.53, 53.47], [-119.75, 54.0], [-119.53, 54.53], [-119.18, 54.68], [-119.03, 55.03], [-118.68, 55.18]]]]}, "2018-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.68, 55.18], [-118.53, 55.53], [-118.0, 55.75], [-117.75, 55.65], [-117.5, 55.75], [-117.25, 55.65], [-117.0, 55.75], [-116.75, 55.65], [-116.5, 55.75], [-116.25, 55.65], [-116.0, 55.75], [-115.75, 55.65], [-115.5, 55.75], [-114.97, 55.53], [-114.75, 55.0], [-114.85, 54.75], [-114.75, 54.5], [-114.97, 53.97], [-115.5, 53.75], [-115.75, 53.85], [-115.82, 53.82], [-115.87, 53.7], [-115.47, 53.53], [-115.32, 53.18], [-114.97, 53.03], [-114.82, 52.68], [-114.47, 52.53], [-114.25, 52.0], [-114.47, 51.47], [-115.0, 51.25], [-115.53, 51.47], [-115.68, 51.82], [-115.75, 51.85], [-116.0, 51.75], [-116.53, 51.97], [-116.68, 52.32], [-116.75, 52.35], [-117.0, 52.25], [-117.53, 52.47], [-117.68, 52.82], [-117.75, 52.85], [-118.0, 52.75], [-118.53, 52.97], [-118.68, 53.32], [-118.75, 53.35], [-119.0, 53.25], [-119.53, 53.47], [-119.75, 54.0], [-119.53, 54.53], [-119.18, 54.68], [-119.03, 55.03], [-118.68, 55.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -20.43078332224198}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -15.656755311489768}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-25.419499451468994, -30.338079764040486, -27.888636467138582]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-27.133930080125964, -33.06292178671029, -32.47421056062208]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-13.157184004250118, -18.024019127578843, -15.789062802640334]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-15.24153435950987, -20.43078332224198, -19.745895306952747]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5126127982866233, -1.993569360254216, -1.706977521331071]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7320913636111266, -2.158292358734924, -2.007913948509074]}}