{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:52.896846", "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": "2022-Jun-13_to_2022-Jun-15_245.0_43.0"}, "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": 2022060000617}, "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 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 15 2022"}, "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": 56624.06356401689}, "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": 43.0}, "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": 245.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "245.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 243.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 247.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-117.53, 43.03], [-117.18, 43.18], [-117.15, 43.25], [-117.25, 43.5], [-117.03, 44.03], [-116.5, 44.25], [-116.25, 44.15], [-116.12, 44.2], [-116.25, 44.5], [-116.03, 45.03], [-115.5, 45.25], [-114.97, 45.03], [-114.82, 44.68], [-114.47, 44.53], [-114.25, 44.0], [-114.37, 43.7], [-114.25, 43.65], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.0, 43.75], [-112.75, 43.65], [-112.5, 43.75], [-111.97, 43.53], [-111.75, 43.0], [-111.97, 42.47], [-112.5, 42.25], [-112.75, 42.35], [-112.82, 42.32], [-112.97, 41.97], [-113.5, 41.75], [-113.75, 41.85], [-114.0, 41.75], [-114.25, 41.85], [-114.5, 41.75], [-114.75, 41.85], [-114.82, 41.82], [-114.97, 41.47], [-115.5, 41.25], [-115.75, 41.35], [-116.0, 41.25], [-116.25, 41.35], [-116.5, 41.25], [-117.03, 41.47], [-117.18, 41.82], [-117.53, 41.97], [-117.75, 42.5], [-117.53, 43.03]]]]}}, "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": {"2022-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.53, 41.97], [-117.75, 42.5], [-117.53, 43.03], [-117.18, 43.18], [-117.15, 43.25], [-117.25, 43.5], [-117.03, 44.03], [-116.5, 44.25], [-116.25, 44.15], [-116.12, 44.2], [-116.25, 44.5], [-116.03, 45.03], [-115.5, 45.25], [-114.97, 45.03], [-114.82, 44.68], [-114.47, 44.53], [-114.25, 44.0], [-114.37, 43.7], [-114.25, 43.65], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.0, 43.75], [-112.75, 43.65], [-112.5, 43.75], [-111.97, 43.53], [-111.75, 43.0], [-111.97, 42.47], [-112.5, 42.25], [-112.75, 42.35], [-112.82, 42.32], [-112.97, 41.97], [-113.5, 41.75], [-113.75, 41.85], [-114.0, 41.75], [-114.25, 41.85], [-114.5, 41.75], [-114.75, 41.85], [-114.82, 41.82], [-114.97, 41.47], [-115.5, 41.25], [-115.75, 41.35], [-116.0, 41.25], [-116.25, 41.35], [-116.5, 41.25], [-117.03, 41.47], [-117.18, 41.82], [-117.53, 41.97]]]]}, "2022-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.53, 41.97], [-117.75, 42.5], [-117.53, 43.03], [-117.18, 43.18], [-117.15, 43.25], [-117.25, 43.5], [-117.03, 44.03], [-116.5, 44.25], [-116.25, 44.15], [-116.12, 44.2], [-116.25, 44.5], [-116.03, 45.03], [-115.5, 45.25], [-114.97, 45.03], [-114.82, 44.68], [-114.47, 44.53], [-114.25, 44.0], [-114.37, 43.7], [-114.25, 43.65], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.0, 43.75], [-112.75, 43.65], [-112.5, 43.75], [-111.97, 43.53], [-111.75, 43.0], [-111.97, 42.47], [-112.5, 42.25], [-112.75, 42.35], [-112.82, 42.32], [-112.97, 41.97], [-113.5, 41.75], [-113.75, 41.85], [-114.0, 41.75], [-114.25, 41.85], [-114.5, 41.75], [-114.75, 41.85], [-114.82, 41.82], [-114.97, 41.47], [-115.5, 41.25], [-115.75, 41.35], [-116.0, 41.25], [-116.25, 41.35], [-116.5, 41.25], [-117.03, 41.47], [-117.18, 41.82], [-117.53, 41.97]]]]}, "2022-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.53, 41.97], [-117.75, 42.5], [-117.53, 43.03], [-117.18, 43.18], [-117.15, 43.25], [-117.25, 43.5], [-117.03, 44.03], [-116.5, 44.25], [-116.25, 44.15], [-116.12, 44.2], [-116.25, 44.5], [-116.03, 45.03], [-115.5, 45.25], [-114.97, 45.03], [-114.82, 44.68], [-114.47, 44.53], [-114.25, 44.0], [-114.37, 43.7], [-114.25, 43.65], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.0, 43.75], [-112.75, 43.65], [-112.5, 43.75], [-111.97, 43.53], [-111.75, 43.0], [-111.97, 42.47], [-112.5, 42.25], [-112.75, 42.35], [-112.82, 42.32], [-112.97, 41.97], [-113.5, 41.75], [-113.75, 41.85], [-114.0, 41.75], [-114.25, 41.85], [-114.5, 41.75], [-114.75, 41.85], [-114.82, 41.82], [-114.97, 41.47], [-115.5, 41.25], [-115.75, 41.35], [-116.0, 41.25], [-116.25, 41.35], [-116.5, 41.25], [-117.03, 41.47], [-117.18, 41.82], [-117.53, 41.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.848404681288741}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.848487393500069}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.391435640654208, 8.59575556974653, 10.545051400301986]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.8972128122734944, -0.6876512550952611, 2.1636413644304753]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.179142180026941, -8.068447222707052, -6.297872777766213]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.767491500862889, -8.848404681288741, -7.524754293847991]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5153361872303677, -1.9866547630882672, -1.535489010676633]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.817357758366758, -2.1433038806145683, -1.772848035044691]}}