{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:27.397698", "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": "2018-Apr-30_to_2018-May-03_245.0_30.5"}, "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": 2018040001205}, "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 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2018"}, "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": 142856.95173286845}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-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": ["Gulf of California"]}, "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": 30.5}, "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": 245.0}, "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": 243.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.53, 29.53], [-114.0, 29.75], [-113.47, 29.53], [-113.25, 29.0], [-113.35, 28.75], [-113.25, 28.5], [-113.47, 27.97], [-114.0, 27.75], [-114.53, 27.97], [-114.75, 28.5], [-114.65, 28.75], [-114.75, 29.0], [-114.53, 29.53]]]]}, "2018-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.65, 33.25], [-116.75, 33.5], [-116.53, 34.03], [-116.18, 34.18], [-116.03, 34.53], [-115.5, 34.75], [-115.25, 34.65], [-115.0, 34.75], [-114.5, 34.54], [-114.0, 34.75], [-113.47, 34.53], [-113.25, 34.0], [-113.37, 33.7], [-112.97, 33.53], [-112.75, 33.0], [-112.87, 32.7], [-112.47, 32.53], [-112.32, 32.18], [-111.97, 32.03], [-111.75, 31.5], [-111.97, 30.97], [-112.32, 30.82], [-112.37, 30.7], [-112.25, 30.65], [-112.0, 30.75], [-111.47, 30.53], [-111.32, 30.18], [-110.97, 30.03], [-110.75, 29.5], [-110.97, 28.97], [-111.5, 28.75], [-111.75, 28.85], [-111.82, 28.82], [-111.97, 28.47], [-112.32, 28.32], [-112.35, 28.25], [-112.25, 28.0], [-112.35, 27.75], [-112.25, 27.5], [-112.47, 26.97], [-113.0, 26.75], [-113.53, 26.97], [-113.75, 27.5], [-113.65, 27.75], [-113.68, 27.82], [-113.75, 27.85], [-114.0, 27.75], [-114.53, 27.97], [-114.75, 28.5], [-114.65, 28.75], [-114.68, 28.82], [-115.03, 28.97], [-115.18, 29.32], [-115.53, 29.47], [-115.75, 30.0], [-115.65, 30.25], [-115.68, 30.32], [-116.03, 30.47], [-116.25, 31.0], [-116.15, 31.25], [-116.25, 31.5], [-116.15, 31.75], [-116.18, 31.82], [-116.53, 31.97], [-116.75, 32.5], [-116.65, 32.75], [-116.75, 33.0], [-116.65, 33.25]], [[-114.32, 31.32], [-114.35, 31.25], [-114.25, 31.0], [-114.35, 30.75], [-114.32, 30.68], [-114.25, 30.65], [-114.0, 30.75], [-113.75, 30.65], [-113.62, 30.7], [-113.68, 30.82], [-114.03, 30.97], [-114.18, 31.32], [-114.25, 31.35], [-114.32, 31.32]]]]}, "2018-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.65, 33.25], [-116.75, 33.5], [-116.53, 34.03], [-116.18, 34.18], [-116.03, 34.53], [-115.5, 34.75], [-115.25, 34.65], [-115.0, 34.75], [-114.5, 34.54], [-114.0, 34.75], [-113.47, 34.53], [-113.25, 34.0], [-113.37, 33.7], 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of mean standardized t2m anomalies.", "value": [-1.1220093707656624, -1.5688855690363643, -2.2942998639417786, -1.6537184322902858]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2082781727160654, -2.0779978667645973, -2.7309847998484407, -2.0550923370548877]}}