{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:09.926620", "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-Jul-08_to_2018-Jul-12_200.0_60.0"}, "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": 2018070000451}, "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": "July 08 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 2018"}, "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": 51651.33776097708}, "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": ["N.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": ["Bering Sea"]}, "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": 60.0}, "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": 200.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "200.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 199.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 203.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-160.53, 60.53], [-160.0, 60.75], [-159.47, 60.53], [-159.25, 60.0], [-159.35, 59.75], [-159.25, 59.5], [-159.47, 58.97], [-160.0, 58.75], [-160.53, 58.97], [-160.75, 59.5], [-160.65, 59.75], [-160.75, 60.0], [-160.53, 60.53]]]]}, "2018-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-161.25, 60.0], [-161.03, 60.53], [-160.5, 60.75], [-160.25, 60.65], [-160.18, 60.68], [-160.15, 60.75], [-160.25, 61.0], [-160.03, 61.53], [-159.68, 61.68], [-159.65, 61.75], [-159.75, 62.0], [-159.53, 62.53], [-159.0, 62.75], [-158.75, 62.65], [-158.5, 62.75], [-158.25, 62.65], [-158.0, 62.75], [-157.75, 62.65], [-157.5, 62.75], [-157.25, 62.65], [-157.0, 62.75], [-156.47, 62.53], [-156.25, 62.0], [-156.35, 61.75], [-156.25, 61.5], [-156.35, 61.25], [-156.25, 61.0], [-156.47, 60.47], [-156.82, 60.32], [-156.85, 60.25], [-156.75, 60.0], [-156.85, 59.75], [-156.75, 59.5], [-156.97, 58.97], [-157.5, 58.75], [-157.75, 58.85], [-157.82, 58.82], [-157.97, 58.47], [-158.5, 58.25], [-158.75, 58.35], [-159.0, 58.25], [-159.53, 58.47], [-159.68, 58.82], [-159.75, 58.85], [-160.0, 58.75], [-160.53, 58.97], [-160.68, 59.32], [-161.03, 59.47], [-161.25, 60.0]]]]}, "2018-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-161.25, 60.0], [-161.03, 60.53], [-160.5, 60.75], [-160.25, 60.65], [-160.18, 60.68], [-160.15, 60.75], [-160.25, 61.0], [-160.03, 61.53], [-159.68, 61.68], [-159.65, 61.75], [-159.75, 62.0], [-159.53, 62.53], [-159.0, 62.75], [-158.75, 62.65], [-158.5, 62.75], [-158.25, 62.65], [-158.0, 62.75], [-157.75, 62.65], [-157.5, 62.75], [-157.25, 62.65], [-157.0, 62.75], [-156.47, 62.53], [-156.25, 62.0], [-156.35, 61.75], [-156.25, 61.5], [-156.35, 61.25], [-156.25, 61.0], [-156.47, 60.47], [-156.82, 60.32], [-156.85, 60.25], [-156.75, 60.0], [-156.85, 59.75], [-156.75, 59.5], [-156.97, 58.97], [-157.5, 58.75], [-157.75, 58.85], [-157.82, 58.82], [-157.97, 58.47], [-158.5, 58.25], [-158.75, 58.35], [-159.0, 58.25], [-159.53, 58.47], [-159.68, 58.82], [-159.75, 58.85], [-160.0, 58.75], [-160.53, 58.97], [-160.68, 59.32], [-161.03, 59.47], [-161.25, 60.0]]]]}, "2018-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-161.25, 60.0], [-161.03, 60.53], [-160.5, 60.75], [-160.25, 60.65], [-160.18, 60.68], [-160.15, 60.75], [-160.25, 61.0], [-160.03, 61.53], [-159.68, 61.68], [-159.65, 61.75], [-159.75, 62.0], [-159.53, 62.53], [-159.0, 62.75], [-158.75, 62.65], [-158.5, 62.75], [-158.25, 62.65], [-158.0, 62.75], [-157.75, 62.65], [-157.5, 62.75], [-157.25, 62.65], [-157.0, 62.75], [-156.47, 62.53], [-156.25, 62.0], [-156.35, 61.75], [-156.25, 61.5], [-156.35, 61.25], [-156.25, 61.0], [-156.47, 60.47], [-156.82, 60.32], [-156.85, 60.25], [-156.75, 60.0], [-156.85, 59.75], [-156.75, 59.5], [-156.97, 58.97], [-157.5, 58.75], [-157.75, 58.85], [-157.82, 58.82], [-157.97, 58.47], [-158.5, 58.25], [-158.75, 58.35], [-159.0, 58.25], [-159.53, 58.47], [-159.68, 58.82], [-159.75, 58.85], [-160.0, 58.75], [-160.53, 58.97], [-160.68, 59.32], [-161.03, 59.47], [-161.25, 60.0]]]]}, "2018-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-161.25, 60.0], [-161.03, 60.53], [-160.5, 60.75], [-160.25, 60.65], [-160.0, 60.75], [-159.47, 60.53], [-159.32, 60.18], [-159.25, 60.15], [-159.0, 60.25], [-158.75, 60.15], [-158.5, 60.25], [-157.97, 60.03], [-157.75, 59.5], [-157.97, 58.97], [-158.32, 58.82], [-158.47, 58.47], [-159.0, 58.25], [-159.53, 58.47], [-159.68, 58.82], [-159.75, 58.85], [-160.0, 58.75], [-160.53, 58.97], [-160.68, 59.32], [-161.03, 59.47], [-161.25, 60.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.423063690689844}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.151472159648059}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.394653640810816, 9.031013822249918, 9.355246255926886, 9.299479432109422, 8.489816505866827]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.510585319318807, 5.097223929549159, 5.928970179699547, 5.757946048255519, 6.26810703957193]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.011162924206388, -4.425923072547513, -4.060103789089563, -4.049852237424109, -3.7958849292059296]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.155439687199987, -5.423063690689844, -4.688741063184352, -4.584918946999949, -3.9516132628027094]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2159182468951926, -1.4306051186112994, -1.3375592811356307, -1.3516093143389598, -1.300197453472482]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2404340402252338, -1.658939219471866, -1.4670637479371524, -1.5544258615854893, -1.3966689717060203]}}