{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:09.047577", "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": "2015-Jun-13_to_2015-Jun-15_248.5_52.0"}, "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": 2015060000506}, "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": "June 13 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 15 2015"}, "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": 73510.22995263914}, "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": 52.0}, "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": 243.25}, "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": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 54.03], [-116.5, 54.25], [-116.25, 54.15], [-116.0, 54.25], [-115.75, 54.15], [-115.5, 54.25], [-115.25, 54.15], [-115.0, 54.25], [-114.75, 54.15], [-114.5, 54.25], [-113.97, 54.03], [-113.82, 53.68], [-113.75, 53.65], [-113.5, 53.75], [-113.25, 53.65], [-113.0, 53.75], [-112.75, 53.65], [-112.5, 53.75], [-112.25, 53.65], [-112.0, 53.75], [-111.47, 53.53], [-111.32, 53.18], [-110.97, 53.03], [-110.82, 52.68], [-110.75, 52.65], [-110.5, 52.75], [-110.25, 52.65], [-110.0, 52.75], [-109.47, 52.53], [-109.25, 52.0], [-109.47, 51.47], [-110.0, 51.25], [-110.25, 51.35], [-110.5, 51.25], [-110.75, 51.35], [-111.0, 51.25], [-111.25, 51.35], [-111.32, 51.32], [-111.47, 50.97], [-112.0, 50.75], [-112.25, 50.85], [-112.32, 50.82], [-112.47, 50.47], [-113.0, 50.25], [-113.25, 50.35], [-113.5, 50.25], [-114.03, 50.47], [-114.18, 50.82], [-114.53, 50.97], [-114.68, 51.32], [-115.03, 51.47], [-115.18, 51.82], [-115.53, 51.97], [-115.68, 52.32], [-115.75, 52.35], [-116.0, 52.25], [-116.25, 52.35], [-116.5, 52.25], [-117.03, 52.47], [-117.25, 53.0], [-117.15, 53.25], [-117.25, 53.5], [-117.03, 54.03]]]]}, "2015-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 54.03], [-116.5, 54.25], [-116.25, 54.15], [-116.0, 54.25], [-115.75, 54.15], [-115.5, 54.25], [-115.25, 54.15], [-115.0, 54.25], [-114.75, 54.15], [-114.5, 54.25], [-113.97, 54.03], [-113.82, 53.68], [-113.75, 53.65], [-113.5, 53.75], [-113.25, 53.65], [-113.0, 53.75], [-112.75, 53.65], [-112.5, 53.75], [-112.25, 53.65], [-112.0, 53.75], [-111.47, 53.53], [-111.32, 53.18], [-110.97, 53.03], [-110.82, 52.68], [-110.75, 52.65], [-110.5, 52.75], [-110.25, 52.65], [-110.0, 52.75], [-109.47, 52.53], [-109.25, 52.0], [-109.47, 51.47], [-110.0, 51.25], [-110.25, 51.35], [-110.5, 51.25], [-110.75, 51.35], [-111.0, 51.25], [-111.25, 51.35], [-111.32, 51.32], [-111.47, 50.97], [-112.0, 50.75], [-112.25, 50.85], [-112.32, 50.82], [-112.47, 50.47], [-113.0, 50.25], [-113.25, 50.35], [-113.5, 50.25], [-114.03, 50.47], [-114.18, 50.82], [-114.53, 50.97], [-114.68, 51.32], [-115.03, 51.47], [-115.18, 51.82], [-115.53, 51.97], [-115.68, 52.32], [-115.75, 52.35], [-116.0, 52.25], [-116.25, 52.35], [-116.5, 52.25], [-117.03, 52.47], [-117.25, 53.0], [-117.15, 53.25], [-117.25, 53.5], [-117.03, 54.03]]]]}, "2015-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 54.03], [-116.5, 54.25], [-116.25, 54.15], [-116.0, 54.25], [-115.75, 54.15], [-115.5, 54.25], [-115.25, 54.15], [-115.0, 54.25], [-114.75, 54.15], [-114.5, 54.25], [-113.97, 54.03], [-113.82, 53.68], [-113.75, 53.65], [-113.5, 53.75], [-113.25, 53.65], [-113.0, 53.75], [-112.75, 53.65], [-112.5, 53.75], [-112.25, 53.65], [-112.0, 53.75], [-111.47, 53.53], [-111.32, 53.18], [-110.97, 53.03], [-110.82, 52.68], [-110.75, 52.65], [-110.5, 52.75], [-110.25, 52.65], [-110.0, 52.75], [-109.47, 52.53], [-109.25, 52.0], [-109.47, 51.47], [-110.0, 51.25], [-110.25, 51.35], [-110.5, 51.25], [-110.75, 51.35], [-111.0, 51.25], [-111.25, 51.35], [-111.32, 51.32], [-111.47, 50.97], [-112.0, 50.75], [-112.25, 50.85], [-112.32, 50.82], [-112.47, 50.47], [-113.0, 50.25], [-113.25, 50.35], [-113.5, 50.25], [-114.03, 50.47], [-114.18, 50.82], [-114.53, 50.97], [-114.68, 51.32], [-115.03, 51.47], [-115.18, 51.82], [-115.53, 51.97], [-115.68, 52.32], [-115.75, 52.35], [-116.0, 52.25], [-116.25, 52.35], [-116.5, 52.25], [-117.03, 52.47], [-117.25, 53.0], [-117.15, 53.25], [-117.25, 53.5], [-117.03, 54.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.393086111283424}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.023211306285632}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.39679614515262, 9.275899943024115, 9.85649363528347]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.999946502685191, 6.4834775346916445, 7.865299108211673]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.028788728013194, -4.236641145187039, -3.804204045656664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.3027286877072015, -5.393086111283424, -4.863397350183732]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4270216964189546, -1.5415265392504738, -1.3848935486498035]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.604047435670105, -1.857978166678216, -1.679423123133508]}}