{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:43:49.782285", "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": "2010-Jan-08_to_2010-Jan-12_250.0_37.0"}, "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": 2010010000295}, "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": "January 08 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2010"}, "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": 81693.43444710375}, "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": 37.0}, "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": 250.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "250.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 252.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 37.03], [-111.18, 37.18], [-111.15, 37.25], 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38.18], [-108.75, 38.15], [-108.62, 38.2]]]]}, "2010-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.65, 36.75], [-111.75, 37.0], [-111.53, 37.53], [-111.18, 37.68], [-111.15, 37.75], [-111.25, 38.0], [-111.03, 38.53], [-110.5, 38.75], [-110.2, 38.63], [-110.03, 39.03], [-109.68, 39.18], [-109.53, 39.53], [-109.0, 39.75], [-108.75, 39.65], [-108.5, 39.75], [-107.97, 39.53], [-107.82, 39.18], [-107.47, 39.03], [-107.25, 38.5], [-107.47, 37.97], [-107.87, 37.8], [-107.75, 37.5], [-107.85, 37.25], [-107.82, 37.18], [-107.75, 37.15], [-107.5, 37.25], [-106.97, 37.03], [-106.75, 36.5], [-106.97, 35.97], [-107.32, 35.82], [-107.47, 35.47], [-108.0, 35.25], [-108.53, 35.47], [-108.68, 35.82], [-108.8, 35.88], [-108.85, 35.75], [-108.75, 35.5], [-108.85, 35.25], [-108.75, 35.0], [-108.97, 34.47], [-109.5, 34.25], [-109.75, 34.35], [-110.0, 34.25], [-110.25, 34.35], [-110.5, 34.25], [-111.03, 34.47], [-111.25, 35.0], [-111.15, 35.25], [-111.18, 35.32], [-111.53, 35.47], [-111.75, 36.0], [-111.65, 36.25], [-111.75, 36.5], [-111.65, 36.75]], [[-108.62, 38.2], [-108.68, 38.32], [-108.75, 38.35], [-108.82, 38.32], [-108.85, 38.25], [-108.82, 38.18], [-108.75, 38.15], [-108.62, 38.2]]]]}, "2010-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.65, 36.75], [-111.75, 37.0], [-111.53, 37.53], [-111.18, 37.68], [-111.15, 37.75], [-111.25, 38.0], [-111.03, 38.53], [-110.5, 38.75], [-110.2, 38.63], [-110.03, 39.03], [-109.68, 39.18], [-109.53, 39.53], [-109.0, 39.75], [-108.75, 39.65], [-108.5, 39.75], [-107.97, 39.53], [-107.82, 39.18], [-107.47, 39.03], [-107.25, 38.5], [-107.47, 37.97], [-107.87, 37.8], [-107.75, 37.5], [-107.85, 37.25], [-107.82, 37.18], [-107.75, 37.15], [-107.5, 37.25], [-106.97, 37.03], [-106.75, 36.5], [-106.97, 35.97], [-107.32, 35.82], [-107.47, 35.47], [-108.0, 35.25], [-108.53, 35.47], [-108.68, 35.82], [-108.8, 35.88], [-108.85, 35.75], [-108.75, 35.5], [-108.85, 35.25], [-108.75, 35.0], [-108.97, 34.47], [-109.5, 34.25], [-109.75, 34.35], [-110.0, 34.25], [-110.25, 34.35], [-110.5, 34.25], [-111.03, 34.47], [-111.25, 35.0], [-111.15, 35.25], [-111.18, 35.32], [-111.53, 35.47], [-111.75, 36.0], [-111.65, 36.25], [-111.75, 36.5], [-111.65, 36.75]], [[-108.62, 38.2], [-108.68, 38.32], [-108.75, 38.35], [-108.82, 38.32], [-108.85, 38.25], [-108.82, 38.18], [-108.75, 38.15], [-108.62, 38.2]]]]}, "2010-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.75, 37.0], [-111.53, 37.53], [-111.0, 37.75], [-110.5, 37.54], [-110.18, 37.68], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-109.53, 38.47], [-109.75, 39.0], [-109.53, 39.53], [-109.0, 39.75], [-108.47, 39.53], [-108.3, 39.13], [-108.0, 39.25], [-107.47, 39.03], [-107.25, 38.5], [-107.47, 37.97], [-108.0, 37.75], [-108.43, 37.93], [-108.25, 37.5], [-108.43, 37.07], [-108.0, 37.25], [-107.47, 37.03], [-107.25, 36.5], [-107.47, 35.97], [-108.0, 35.75], [-108.53, 35.97], [-108.75, 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"value": [-1.7552539841870658, -2.070185810330109, -1.7780272665772188, -1.4949016249713916, -1.5527246137477646]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3877016078061297, -2.6286551330485795, -2.27258327143052, -1.679550027108577, -1.5527246137477646]}}