{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:26.868232", "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-Apr-30_to_2024-May-03_248.5_45.5"}, "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": 2024040000697}, "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": "April 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 50780.484532487484}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 45.5}, "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": 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": 247.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.18, 44.68], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.47, 46.03], [-110.32, 45.68], [-110.25, 45.65], [-110.0, 45.75], [-109.75, 45.65], [-109.5, 45.75], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.87, 44.3], [-108.75, 44.0], [-108.96, 43.5], [-108.75, 43.0], [-108.97, 42.47], [-109.5, 42.25], [-110.03, 42.47], [-110.18, 42.82], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.7, 43.38], [-112.0, 43.25], [-112.25, 43.35], [-112.5, 43.25], [-113.03, 43.47], [-113.25, 44.0], [-113.03, 44.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 46.03], [-111.5, 46.25], [-110.97, 46.03], [-110.75, 45.5], [-110.97, 44.97], [-111.5, 44.75], [-112.03, 44.97], [-112.25, 45.5], [-112.03, 46.03]]]]}, "2024-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.5, 43.25], [-113.03, 43.47], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.18, 44.68], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.47, 46.03], [-110.32, 45.68], [-110.25, 45.65], [-110.0, 45.75], [-109.75, 45.65], [-109.5, 45.75], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.87, 44.3], [-108.75, 44.0], [-108.96000000000001, 43.5], [-108.75, 43.0], [-108.97, 42.47], [-109.5, 42.25], [-110.03, 42.47], [-110.18, 42.82], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.69999999999999, 43.38], [-112.0, 43.25], [-112.25, 43.35], [-112.5, 43.25]]]]}, "2024-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.5, 43.25], [-113.03, 43.47], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.18, 44.68], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.47, 46.03], [-110.32, 45.68], [-110.25, 45.65], [-110.0, 45.75], [-109.75, 45.65], [-109.5, 45.75], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.87, 44.3], [-108.75, 44.0], [-108.96000000000001, 43.5], [-108.75, 43.0], [-108.97, 42.47], [-109.5, 42.25], [-110.03, 42.47], [-110.18, 42.82], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.69999999999999, 43.38], [-112.0, 43.25], [-112.25, 43.35], [-112.5, 43.25]]]]}, "2024-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.5, 43.25], [-113.03, 43.47], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.18, 44.68], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.47, 46.03], [-110.32, 45.68], [-110.25, 45.65], [-110.0, 45.75], [-109.75, 45.65], [-109.5, 45.75], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.87, 44.3], [-108.75, 44.0], [-108.96000000000001, 43.5], [-108.75, 43.0], [-108.97, 42.47], [-109.5, 42.25], [-110.03, 42.47], [-110.18, 42.82], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.69999999999999, 43.38], [-112.0, 43.25], [-112.25, 43.35], [-112.5, 43.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.996141000879163}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.85061346188827}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.081001045334517, -3.095293213205707, -4.459654502106446, -2.529336430874821]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.081001045334517, -7.095594178193778, -9.228875722764712, -6.87336224240795]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.373196669141123, -5.24257453510274, -6.959004640662074, -5.371018461758566]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.373196669141123, -6.81457272487097, -7.996141000879163, -7.135892738846167]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.40099912904222, -1.5407646826488754, -2.1412808855826304, -1.6682151076768164]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.40099912904222, -1.7290916069716413, -2.5540638345355573, -1.930669501738337]}}