{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:26.678044", "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-Jul-26_to_2015-Jul-28_244.0_50.0"}, "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": 2015070001146}, "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": "July 26 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 28 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": 118905.27346877931}, "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", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "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": 50.0}, "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": 244.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "244.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 241.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 246.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.65, 47.75], [-118.75, 48.0], [-118.53, 48.53], [-118.0, 48.75], [-117.75, 48.65], [-117.68, 48.68], [-117.65, 48.75], [-117.75, 49.0], [-117.65, 49.25], [-117.68, 49.32], [-118.03, 49.47], [-118.25, 50.0], [-118.04, 50.5], [-118.25, 51.0], [-118.03, 51.53], [-117.5, 51.75], [-117.25, 51.65], [-117.0, 51.75], [-116.75, 51.65], [-116.68, 51.68], [-116.53, 52.03], [-116.0, 52.25], [-115.75, 52.15], [-115.5, 52.25], [-114.97, 52.03], [-114.82, 51.68], [-114.75, 51.65], [-114.5, 51.75], [-114.25, 51.65], [-114.0, 51.75], [-113.47, 51.53], [-113.25, 51.0], [-113.47, 50.47], [-113.82, 50.32], [-113.85, 50.25], [-113.82, 50.18], [-113.47, 50.03], [-113.32, 49.68], [-112.97, 49.53], [-112.75, 49.0], [-112.97, 48.47], [-113.32, 48.32], [-113.47, 47.97], [-114.0, 47.75], [-114.25, 47.85], [-114.5, 47.75], [-114.75, 47.85], [-114.82, 47.82], [-114.97, 47.47], [-115.32, 47.32], [-115.47, 46.97], [-116.0, 46.75], [-116.25, 46.85], [-116.32, 46.82], [-116.47, 46.47], [-117.0, 46.25], [-117.25, 46.35], [-117.5, 46.25], [-117.75, 46.35], [-118.0, 46.25], [-118.53, 46.47], [-118.75, 47.0], [-118.65, 47.25], [-118.75, 47.5], [-118.65, 47.75]]]]}, "2015-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.65, 47.75], [-118.75, 48.0], [-118.53, 48.53], [-118.0, 48.75], [-117.75, 48.65], [-117.68, 48.68], [-117.65, 48.75], [-117.75, 49.0], [-117.65, 49.25], [-117.68, 49.32], [-118.03, 49.47], [-118.25, 50.0], [-118.04, 50.5], [-118.25, 51.0], [-118.03, 51.53], [-117.5, 51.75], [-117.25, 51.65], [-117.0, 51.75], [-116.75, 51.65], [-116.68, 51.68], [-116.53, 52.03], [-116.0, 52.25], [-115.75, 52.15], [-115.5, 52.25], [-114.97, 52.03], [-114.82, 51.68], [-114.75, 51.65], [-114.5, 51.75], [-114.25, 51.65], [-114.0, 51.75], [-113.47, 51.53], [-113.25, 51.0], [-113.47, 50.47], [-113.82, 50.32], [-113.85, 50.25], [-113.82, 50.18], [-113.47, 50.03], [-113.32, 49.68], [-112.97, 49.53], [-112.75, 49.0], [-112.97, 48.47], [-113.32, 48.32], [-113.47, 47.97], [-114.0, 47.75], [-114.25, 47.85], [-114.5, 47.75], [-114.75, 47.85], [-114.82, 47.82], [-114.97, 47.47], [-115.32, 47.32], [-115.47, 46.97], [-116.0, 46.75], [-116.25, 46.85], [-116.32, 46.82], [-116.47, 46.47], [-117.0, 46.25], [-117.25, 46.35], [-117.5, 46.25], [-117.75, 46.35], [-118.0, 46.25], [-118.53, 46.47], [-118.75, 47.0], [-118.65, 47.25], [-118.75, 47.5], [-118.65, 47.75]]]]}, "2015-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.65, 47.75], [-118.75, 48.0], [-118.53, 48.53], [-118.0, 48.75], [-117.75, 48.65], [-117.68, 48.68], [-117.65, 48.75], [-117.75, 49.0], [-117.65, 49.25], [-117.68, 49.32], [-118.03, 49.47], [-118.25, 50.0], [-118.04, 50.5], [-118.25, 51.0], [-118.03, 51.53], [-117.5, 51.75], [-117.25, 51.65], [-117.0, 51.75], [-116.75, 51.65], [-116.68, 51.68], [-116.53, 52.03], [-116.0, 52.25], [-115.75, 52.15], [-115.5, 52.25], [-114.97, 52.03], [-114.82, 51.68], [-114.75, 51.65], [-114.5, 51.75], [-114.25, 51.65], [-114.0, 51.75], [-113.47, 51.53], [-113.25, 51.0], [-113.47, 50.47], [-113.82, 50.32], [-113.85, 50.25], [-113.82, 50.18], [-113.47, 50.03], [-113.32, 49.68], [-112.97, 49.53], [-112.75, 49.0], [-112.97, 48.47], [-113.32, 48.32], [-113.47, 47.97], [-114.0, 47.75], [-114.25, 47.85], [-114.5, 47.75], [-114.75, 47.85], [-114.82, 47.82], [-114.97, 47.47], [-115.32, 47.32], [-115.47, 46.97], [-116.0, 46.75], [-116.25, 46.85], [-116.32, 46.82], [-116.47, 46.47], [-117.0, 46.25], [-117.25, 46.35], [-117.5, 46.25], [-117.75, 46.35], [-118.0, 46.25], [-118.53, 46.47], [-118.75, 47.0], [-118.65, 47.25], [-118.75, 47.5], [-118.65, 47.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.424777074200847}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.979031633335989}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.173046743994746, 10.857110598965107, 11.763475246576377]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.192395991455442, 3.4882484723593734, 4.709625258821291]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.413381169673174, -6.696028177621408, -5.827685552713382]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.209302815625733, -8.424777074200847, -7.248691697653555]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7035984001887974, -2.1155254808389405, -1.8235280061284582]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1358602407605436, -2.49307066006332, -2.2328277868232456]}}