{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:38.346993", "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": "2013-Feb-24_to_2013-Feb-28_245.5_40.5"}, "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": 2013020000848}, "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": "February 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 56771.605221546255}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 40.5}, "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": 245.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "245.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 242.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 246.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 39.03], [-116.62, 39.2], [-116.75, 39.5], [-116.53, 40.03], [-116.0, 40.25], [-115.75, 40.15], [-115.62, 40.2], [-115.75, 40.5], [-115.53, 41.03], [-115.0, 41.25], [-114.75, 41.15], [-114.5, 41.25], [-113.97, 41.03], [-113.82, 40.68], [-113.47, 40.53], [-113.25, 40.0], [-113.47, 39.47], [-114.0, 39.25], [-114.25, 39.35], [-114.5, 39.25], [-114.8, 39.38], [-114.85, 39.25], [-114.75, 39.0], [-114.97, 38.47], [-115.5, 38.25], [-115.8, 38.38], [-115.85, 38.25], [-115.75, 38.0], [-115.97, 37.47], [-116.5, 37.25], [-117.03, 37.47], [-117.25, 38.0], [-117.15, 38.25], [-117.25, 38.5], [-117.03, 39.03]]]]}, "2013-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.75, 40.5], [-117.53, 41.03], [-117.18, 41.18], [-117.03, 41.53], [-116.5, 41.75], [-116.0, 41.54], [-115.68, 41.68], [-115.53, 42.03], [-115.0, 42.25], [-114.47, 42.03], [-114.32, 41.68], [-113.97, 41.53], [-113.75, 41.0], [-113.85, 40.75], [-113.82, 40.68], [-113.47, 40.53], [-113.25, 40.0], [-113.47, 39.47], [-113.82, 39.32], [-113.97, 38.97], [-114.5, 38.75], [-114.8, 38.88], [-114.97, 38.47], [-115.5, 38.25], [-115.75, 38.35], [-115.82, 38.32], [-115.85, 38.25], [-115.75, 38.0], [-115.97, 37.47], [-116.5, 37.25], [-117.03, 37.47], [-117.25, 38.0], [-117.15, 38.25], [-117.25, 38.5], [-117.03, 39.03], [-116.68, 39.18], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.75, 40.5]]]]}, "2013-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.75, 40.5], [-117.53, 41.03], [-117.18, 41.18], [-117.03, 41.53], [-116.5, 41.75], [-116.0, 41.54], [-115.68, 41.68], [-115.53, 42.03], [-115.0, 42.25], [-114.47, 42.03], [-114.32, 41.68], [-113.97, 41.53], [-113.75, 41.0], [-113.85, 40.75], [-113.82, 40.68], [-113.47, 40.53], [-113.25, 40.0], [-113.47, 39.47], [-113.82, 39.32], [-113.97, 38.97], [-114.5, 38.75], [-114.8, 38.88], [-114.97, 38.47], [-115.5, 38.25], [-115.75, 38.35], [-115.82, 38.32], [-115.85, 38.25], [-115.75, 38.0], [-115.97, 37.47], [-116.5, 37.25], [-117.03, 37.47], [-117.25, 38.0], [-117.15, 38.25], [-117.25, 38.5], [-117.03, 39.03], [-116.68, 39.18], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.75, 40.5]]]]}, "2013-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.75, 40.5], [-117.53, 41.03], [-117.18, 41.18], [-117.03, 41.53], [-116.5, 41.75], [-116.0, 41.54], [-115.68, 41.68], [-115.53, 42.03], [-115.0, 42.25], [-114.47, 42.03], [-114.32, 41.68], [-113.97, 41.53], [-113.75, 41.0], [-113.85, 40.75], [-113.82, 40.68], [-113.47, 40.53], [-113.25, 40.0], [-113.47, 39.47], [-113.82, 39.32], [-113.97, 38.97], [-114.5, 38.75], [-114.8, 38.88], [-114.97, 38.47], [-115.5, 38.25], [-115.75, 38.35], [-115.82, 38.32], [-115.85, 38.25], [-115.75, 38.0], [-115.97, 37.47], [-116.5, 37.25], [-117.03, 37.47], [-117.25, 38.0], [-117.15, 38.25], [-117.25, 38.5], [-117.03, 39.03], [-116.68, 39.18], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.75, 40.5]]]]}, "2013-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 39.97], [-117.25, 40.5], [-117.03, 41.03], [-116.5, 41.25], [-115.97, 41.03], [-115.75, 40.5], [-115.97, 39.97], [-116.5, 39.75], [-117.03, 39.97]]], [[[-115.03, 39.97], [-115.25, 40.5], [-115.03, 41.03], [-114.5, 41.25], [-113.97, 41.03], [-113.75, 40.5], [-113.97, 39.97], [-114.5, 39.75], [-115.03, 39.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.935791315279914}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.136932956898722}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.436750236815442, -11.000757536785954, -10.247956312841723, -12.448390836520673, -7.547866413630572]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-11.979260859557485, -12.753921918713957, -12.563279524863276, -15.412301796883867, -8.379155921700317]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.975502519166323, -9.027034728475968, -8.273240388790414, -10.712734491817315, -7.136841066044269]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.945566471362724, -11.356731151989095, -10.95314467761392, -12.935791315279914, -7.696707914212368]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.637165954613958, -1.8582240488052724, -1.697088478654618, -2.229289888778333, -1.4212981962404694]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0855594445225725, -2.3263225720630607, -2.254129732222748, -2.6929667828346444, -1.5002801532515828]}}