{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:58.096880", "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": "2021-Jun-03_to_2021-Jun-10_199.5_62.0"}, "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": 2021060000183}, "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 03 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 10 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 62703.32711001868}, "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": []}, "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": 62.0}, "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": 199.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "199.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 197.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.5, 63.75], [-161.97, 63.53], [-161.75, 63.0], [-161.97, 62.47], [-162.5, 62.25], [-163.03, 62.47], [-163.25, 63.0], [-163.03, 63.53], [-162.5, 63.75]]]]}, "2021-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.15, 62.25], [-163.25, 62.5], [-163.15, 62.75], [-163.25, 63.0], [-163.03, 63.53], [-162.5, 63.75], [-161.97, 63.53], [-161.82, 63.18], [-161.7, 63.13], [-161.53, 63.53], [-161.0, 63.75], [-160.75, 63.65], [-160.5, 63.75], [-160.25, 63.65], [-160.0, 63.75], [-159.75, 63.65], [-159.5, 63.75], [-158.97, 63.53], [-158.75, 63.0], [-158.97, 62.47], [-159.32, 62.32], [-159.47, 61.97], [-159.82, 61.82], [-159.97, 61.47], [-160.32, 61.32], [-160.47, 60.97], [-161.0, 60.75], [-161.25, 60.85], [-161.32, 60.82], [-161.47, 60.47], [-162.0, 60.25], [-162.53, 60.47], [-162.68, 60.82], [-163.03, 60.97], [-163.25, 61.5], [-163.15, 61.75], [-163.25, 62.0], [-163.15, 62.25]], [[-161.18, 62.18], [-161.15, 62.25], [-161.18, 62.32], [-161.3, 62.38], [-161.35, 62.25], [-161.32, 62.18], [-161.25, 62.15], [-161.18, 62.18]]]]}, "2021-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.15, 62.25], [-163.25, 62.5], [-163.15, 62.75], [-163.25, 63.0], [-163.03, 63.53], [-162.5, 63.75], [-161.97, 63.53], [-161.82, 63.18], [-161.75, 63.15], [-161.68, 63.18], [-161.53, 63.53], [-161.0, 63.75], [-160.75, 63.65], [-160.5, 63.75], [-160.25, 63.65], [-160.0, 63.75], [-159.75, 63.65], [-159.5, 63.75], [-159.25, 63.65], [-159.0, 63.75], [-158.47, 63.53], [-158.32, 63.18], [-158.25, 63.15], [-158.0, 63.25], [-157.47, 63.03], [-157.25, 62.5], [-157.47, 61.97], [-158.0, 61.75], [-158.25, 61.85], [-158.32, 61.82], [-158.35, 61.75], [-158.25, 61.5], [-158.47, 60.97], [-159.0, 60.75], [-159.25, 60.85], [-159.32, 60.82], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.32, 59.82], [-160.47, 59.47], [-161.0, 59.25], [-161.25, 59.35], [-161.5, 59.25], [-162.03, 59.47], [-162.25, 60.0], [-162.15, 60.25], [-162.18, 60.32], [-162.53, 60.47], [-162.68, 60.82], [-163.03, 60.97], [-163.25, 61.5], [-163.15, 61.75], [-163.25, 62.0], [-163.15, 62.25]]]]}, "2021-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.15, 62.25], [-163.25, 62.5], [-163.03, 63.03], [-162.5, 63.25], [-162.25, 63.15], [-162.0, 63.25], [-161.75, 63.15], [-161.68, 63.18], [-161.53, 63.53], [-161.0, 63.75], [-160.75, 63.65], [-160.5, 63.75], [-160.25, 63.65], [-160.0, 63.75], [-159.75, 63.65], [-159.5, 63.75], [-159.25, 63.65], [-159.0, 63.75], [-158.47, 63.53], [-158.32, 63.18], [-158.25, 63.15], [-158.0, 63.25], [-157.47, 63.03], [-157.25, 62.5], [-157.47, 61.97], [-158.0, 61.75], [-158.25, 61.85], [-158.32, 61.82], [-158.35, 61.75], [-158.25, 61.5], [-158.47, 60.97], [-159.0, 60.75], [-159.25, 60.85], [-159.32, 60.82], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.32, 59.82], [-160.47, 59.47], [-161.0, 59.25], [-161.25, 59.35], [-161.5, 59.25], [-162.03, 59.47], [-162.25, 60.0], [-162.15, 60.25], [-162.18, 60.32], [-162.53, 60.47], [-162.68, 60.82], [-163.03, 60.97], [-163.25, 61.5], [-163.15, 61.75], [-163.25, 62.0], [-163.15, 62.25]]]]}, "2021-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.15, 62.25], [-163.25, 62.5], [-163.03, 63.03], [-162.5, 63.25], [-162.25, 63.15], [-162.0, 63.25], [-161.75, 63.15], [-161.68, 63.18], [-161.53, 63.53], [-161.0, 63.75], [-160.75, 63.65], [-160.5, 63.75], [-160.25, 63.65], [-160.0, 63.75], [-159.75, 63.65], [-159.5, 63.75], [-159.25, 63.65], [-159.0, 63.75], [-158.47, 63.53], [-158.32, 63.18], [-158.25, 63.15], [-158.0, 63.25], [-157.47, 63.03], [-157.25, 62.5], [-157.47, 61.97], [-158.0, 61.75], [-158.25, 61.85], [-158.32, 61.82], [-158.35, 61.75], [-158.25, 61.5], [-158.47, 60.97], [-159.0, 60.75], [-159.25, 60.85], [-159.32, 60.82], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.32, 59.82], [-160.47, 59.47], [-161.0, 59.25], [-161.25, 59.35], [-161.5, 59.25], [-162.03, 59.47], [-162.25, 60.0], [-162.15, 60.25], [-162.18, 60.32], [-162.53, 60.47], [-162.68, 60.82], [-163.03, 60.97], [-163.25, 61.5], [-163.15, 61.75], [-163.25, 62.0], [-163.15, 62.25]]]]}, "2021-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.15, 62.25], [-163.25, 62.5], [-163.03, 63.03], [-162.5, 63.25], [-162.25, 63.15], [-162.0, 63.25], [-161.75, 63.15], [-161.68, 63.18], [-161.53, 63.53], [-161.0, 63.75], [-160.75, 63.65], [-160.5, 63.75], [-160.25, 63.65], [-160.0, 63.75], [-159.75, 63.65], [-159.5, 63.75], [-159.25, 63.65], [-159.0, 63.75], [-158.47, 63.53], [-158.32, 63.18], [-158.25, 63.15], [-158.0, 63.25], [-157.47, 63.03], [-157.32, 62.68], [-156.97, 62.53], [-156.75, 62.0], [-156.97, 61.47], [-157.5, 61.25], [-158.03, 61.47], [-158.18, 61.82], [-158.25, 61.85], [-158.32, 61.82], [-158.35, 61.75], [-158.25, 61.5], [-158.47, 60.97], [-159.0, 60.75], [-159.25, 60.85], [-159.32, 60.82], [-159.47, 60.47], [-160.0, 60.25], [-160.25, 60.35], [-160.32, 60.32], [-160.47, 59.97], [-161.0, 59.75], [-161.25, 59.85], [-161.5, 59.75], [-162.03, 59.97], [-162.18, 60.32], [-162.53, 60.47], [-162.68, 60.82], [-163.03, 60.97], [-163.25, 61.5], [-163.15, 61.75], [-163.25, 62.0], [-163.15, 62.25]]]]}, "2021-06-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.5, 62.75], [-156.97, 62.53], [-156.75, 62.0], [-156.97, 61.47], [-157.5, 61.25], [-158.03, 61.47], [-158.25, 62.0], [-158.03, 62.53], [-157.5, 62.75]]]]}, "2021-06-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.5, 62.75], [-156.97, 62.53], [-156.75, 62.0], [-156.97, 61.47], [-157.5, 61.25], [-158.03, 61.47], [-158.25, 62.0], [-158.03, 62.53], [-157.5, 62.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.46369678370678}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.81718349660082}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.530366717327013, 5.917012097471229, 5.7958960095469365, 6.788890173759171, 6.325561534777421, 7.285300195678417, 8.402431822176027, 8.67010096716956]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.530366717327013, 1.8609427580843771, 3.234023534700441, 4.967762956024615, 4.609196784307358, 5.321056095804977, 8.402431822176027, 8.67010096716956]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.681559468917385, -4.905616740459483, -5.313729429837991, -4.50018230036282, -5.075297972507907, -4.353103125212544, -3.5037391096946635, -3.4214475873420156]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.681559468917385, -6.46369678370678, -5.788219301462789, -5.178972832215607, -5.712656060558174, -4.968630124865001, -3.5037391096946635, -3.4214475873420156]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5934024598208896, -1.5173505786230461, -1.768714828747053, -1.5119553492957214, -1.7313496821944792, -1.5028329471671815, -1.3338198060526205, -1.2804993200988133]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5934024598208896, -1.8482625877927008, -1.9581251761534229, -1.7517410011744927, -1.9286040525259127, -1.692027225918728, -1.3338198060526205, -1.2804993200988133]}}