{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:15.194239", "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-Mar-21_to_2010-Mar-27_266.0_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": 2010030000662}, "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": "March 21 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 27 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 205907.76443795615}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.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": ["Hudson Bay"]}, "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": 266.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.53, 62.47], [-92.75, 63.0], [-92.53, 63.53], [-92.0, 63.75], [-91.75, 63.65], [-91.5, 63.75], [-91.2, 63.62], [-91.03, 64.03], [-90.5, 64.25], [-90.25, 64.15], [-90.0, 64.25], [-89.47, 64.03], [-89.25, 63.5], [-89.47, 62.97], [-90.0, 62.75], [-90.25, 62.85], [-90.5, 62.75], [-90.8, 62.88], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.53, 62.47]]]]}, "2010-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.65, 62.75], [-95.75, 63.0], [-95.53, 63.53], [-95.18, 63.68], [-95.15, 63.75], [-95.25, 64.0], [-95.03, 64.53], [-94.5, 64.75], [-94.25, 64.65], [-94.0, 64.75], [-93.75, 64.65], [-93.5, 64.75], [-93.25, 64.65], [-93.0, 64.75], [-92.75, 64.65], [-92.5, 64.75], [-92.25, 64.65], [-92.0, 64.75], [-91.75, 64.65], [-91.5, 64.75], [-91.25, 64.65], [-91.0, 64.75], [-90.75, 64.65], [-90.5, 64.75], [-89.97, 64.53], [-89.82, 64.18], [-89.47, 64.03], [-89.25, 63.5], [-89.47, 62.97], [-90.0, 62.75], [-90.25, 62.85], [-90.5, 62.75], [-90.75, 62.85], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.25, 62.35], [-92.32, 62.32], [-92.47, 61.97], [-92.82, 61.82], [-92.97, 61.47], [-93.5, 61.25], [-93.75, 61.35], [-94.0, 61.25], [-94.25, 61.35], [-94.5, 61.25], [-94.75, 61.35], [-95.0, 61.25], [-95.53, 61.47], [-95.75, 62.0], [-95.65, 62.25], [-95.75, 62.5], [-95.65, 62.75]]]]}, "2010-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 63.5], [-101.03, 64.03], [-100.68, 64.18], [-100.53, 64.53], [-100.0, 64.75], [-99.75, 64.65], [-99.5, 64.75], [-99.25, 64.65], [-99.0, 64.75], [-98.7, 64.63], [-98.53, 65.03], [-98.0, 65.25], [-97.75, 65.15], [-97.5, 65.25], [-96.97, 65.03], [-96.82, 64.68], [-96.75, 64.65], [-96.5, 64.75], [-96.25, 64.65], [-96.0, 64.75], [-95.47, 64.53], [-95.32, 64.18], [-95.25, 64.15], [-95.18, 64.18], [-95.03, 64.53], [-94.5, 64.75], [-94.25, 64.65], [-94.0, 64.75], [-93.75, 64.65], [-93.5, 64.75], [-93.25, 64.65], [-93.0, 64.75], [-92.75, 64.65], [-92.5, 64.75], [-92.25, 64.65], [-92.0, 64.75], [-91.75, 64.65], [-91.5, 64.75], [-91.25, 64.65], [-91.0, 64.75], [-90.75, 64.65], [-90.5, 64.75], [-89.97, 64.53], [-89.82, 64.18], [-89.47, 64.03], [-89.25, 63.5], [-89.47, 62.97], [-90.0, 62.75], [-90.25, 62.85], [-90.5, 62.75], [-90.75, 62.85], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.25, 62.35], [-92.32, 62.32], [-92.47, 61.97], [-92.82, 61.82], [-92.97, 61.47], [-93.32, 61.32], [-93.47, 60.97], [-93.82, 60.82], [-93.97, 60.47], [-94.32, 60.32], [-94.47, 59.97], [-95.0, 59.75], [-95.25, 59.85], [-95.5, 59.75], [-96.03, 59.97], [-96.18, 60.32], [-96.25, 60.35], [-96.5, 60.25], [-96.75, 60.35], [-97.0, 60.25], [-97.25, 60.35], [-97.5, 60.25], [-98.03, 60.47], [-98.18, 60.82], [-98.25, 60.85], [-98.5, 60.75], [-99.03, 60.97], [-99.18, 61.32], [-99.25, 61.35], [-99.5, 61.25], [-100.03, 61.47], [-100.18, 61.82], [-100.53, 61.97], [-100.75, 62.5], [-100.65, 62.75], [-100.68, 62.82], [-101.03, 62.97], [-101.25, 63.5]]]]}, "2010-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 63.5], [-101.03, 64.03], [-100.68, 64.18], [-100.53, 64.53], [-100.0, 64.75], [-99.75, 64.65], [-99.5, 64.75], [-99.25, 64.65], [-99.0, 64.75], [-98.7, 64.63], [-98.53, 65.03], [-98.0, 65.25], [-97.75, 65.15], [-97.5, 65.25], [-96.97, 65.03], [-96.82, 64.68], [-96.75, 64.65], [-96.5, 64.75], [-96.25, 64.65], [-96.0, 64.75], [-95.5, 64.54], [-95.0, 64.75], [-94.75, 64.65], [-94.5, 64.75], [-94.25, 64.65], [-94.0, 64.75], [-93.75, 64.65], [-93.5, 64.75], [-93.25, 64.65], [-93.0, 64.75], [-92.75, 64.65], [-92.5, 64.75], [-92.25, 64.65], [-92.0, 64.75], [-91.75, 64.65], [-91.5, 64.75], [-91.25, 64.65], [-91.0, 64.75], [-90.75, 64.65], [-90.5, 64.75], [-89.97, 64.53], [-89.75, 64.0], [-89.97, 63.47], [-90.32, 63.32], [-90.47, 62.97], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-91.82, 62.32], [-91.97, 61.97], [-92.32, 61.82], [-92.47, 61.47], [-92.82, 61.32], [-92.97, 60.97], [-93.32, 60.82], [-93.35, 60.75], [-93.25, 60.5], [-93.47, 59.97], [-93.82, 59.82], [-93.85, 59.75], [-93.75, 59.5], [-93.87, 59.2], [-93.75, 59.15], [-93.5, 59.25], [-92.97, 59.03], [-92.75, 58.5], [-92.85, 58.25], [-92.82, 58.18], [-92.47, 58.03], [-92.25, 57.5], [-92.35, 57.25], [-92.25, 57.0], [-92.47, 56.47], [-93.0, 56.25], [-93.25, 56.35], [-93.5, 56.25], [-93.75, 56.35], [-94.0, 56.25], [-94.53, 56.47], [-94.68, 56.82], [-95.03, 56.97], [-95.25, 57.5], [-95.15, 57.75], [-95.18, 57.82], [-95.53, 57.97], [-95.68, 58.32], [-96.03, 58.47], [-96.18, 58.82], [-96.53, 58.97], [-96.68, 59.32], [-97.03, 59.47], [-97.18, 59.82], [-97.53, 59.97], [-97.68, 60.32], [-98.03, 60.47], [-98.18, 60.82], [-98.25, 60.85], [-98.5, 60.75], [-99.03, 60.97], [-99.18, 61.32], [-99.25, 61.35], [-99.5, 61.25], [-100.03, 61.47], [-100.18, 61.82], [-100.53, 61.97], [-100.75, 62.5], [-100.65, 62.75], [-100.68, 62.82], [-101.03, 62.97], [-101.25, 63.5]]]]}, "2010-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 63.5], [-101.03, 64.03], [-100.68, 64.18], [-100.53, 64.53], [-100.0, 64.75], [-99.75, 64.65], [-99.5, 64.75], [-99.25, 64.65], [-99.0, 64.75], [-98.7, 64.63], [-98.53, 65.03], [-98.18, 65.18], [-98.03, 65.53], [-97.5, 65.75], [-96.97, 65.53], [-96.82, 65.18], [-96.47, 65.03], [-96.32, 64.68], [-96.25, 64.65], [-96.0, 64.75], [-95.5, 64.54], [-95.0, 64.75], [-94.75, 64.65], [-94.5, 64.75], [-94.25, 64.65], [-94.0, 64.75], [-93.75, 64.65], [-93.5, 64.75], [-92.97, 64.53], [-92.82, 64.18], [-92.75, 64.15], [-92.5, 64.25], [-91.97, 64.03], [-91.82, 63.68], [-91.47, 63.53], [-91.25, 63.0], [-91.47, 62.47], [-91.82, 62.32], [-91.97, 61.97], [-92.32, 61.82], [-92.47, 61.47], [-92.82, 61.32], [-92.97, 60.97], [-93.32, 60.82], [-93.35, 60.75], [-93.25, 60.5], [-93.47, 59.97], [-93.82, 59.82], [-93.85, 59.75], [-93.75, 59.5], [-93.87, 59.2], [-93.75, 59.15], [-93.5, 59.25], [-92.97, 59.03], [-92.75, 58.5], [-92.85, 58.25], [-92.82, 58.18], [-92.47, 58.03], [-92.25, 57.5], [-92.35, 57.25], [-92.25, 57.0], [-92.47, 56.47], [-93.0, 56.25], [-93.25, 56.35], [-93.5, 56.25], [-93.75, 56.35], [-94.0, 56.25], [-94.53, 56.47], [-94.68, 56.82], [-95.03, 56.97], [-95.25, 57.5], [-95.15, 57.75], [-95.18, 57.82], [-95.53, 57.97], [-95.68, 58.32], [-96.03, 58.47], [-96.18, 58.82], [-96.53, 58.97], [-96.68, 59.32], [-97.03, 59.47], [-97.18, 59.82], [-97.53, 59.97], [-97.68, 60.32], [-98.03, 60.47], [-98.18, 60.82], [-98.25, 60.85], [-98.5, 60.75], [-99.03, 60.97], [-99.18, 61.32], [-99.25, 61.35], [-99.5, 61.25], [-100.03, 61.47], [-100.18, 61.82], [-100.53, 61.97], [-100.75, 62.5], [-100.65, 62.75], [-100.68, 62.82], [-101.03, 62.97], [-101.25, 63.5]]]]}, "2010-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.53, 64.03], [-99.0, 64.25], [-98.75, 64.15], [-98.68, 64.18], [-98.65, 64.25], [-98.75, 64.5], [-98.53, 65.03], [-98.18, 65.18], [-98.03, 65.53], [-97.5, 65.75], [-96.97, 65.53], [-96.82, 65.18], [-96.47, 65.03], [-96.32, 64.68], [-96.25, 64.65], [-96.0, 64.75], [-95.5, 64.54], [-95.0, 64.75], [-94.75, 64.65], [-94.5, 64.75], [-94.25, 64.65], [-94.0, 64.75], [-93.75, 64.65], [-93.5, 64.75], [-92.97, 64.53], [-92.82, 64.18], [-92.75, 64.15], [-92.5, 64.25], [-91.97, 64.03], [-91.82, 63.68], [-91.47, 63.53], [-91.25, 63.0], [-91.47, 62.47], [-91.82, 62.32], [-91.97, 61.97], [-92.32, 61.82], [-92.47, 61.47], [-92.82, 61.32], [-92.97, 60.97], [-93.32, 60.82], [-93.35, 60.75], [-93.25, 60.5], [-93.47, 59.97], [-93.82, 59.82], [-93.85, 59.75], [-93.75, 59.5], [-93.87, 59.2], [-93.75, 59.15], [-93.5, 59.25], [-92.97, 59.03], [-92.75, 58.5], [-92.85, 58.25], [-92.82, 58.18], [-92.47, 58.03], [-92.25, 57.5], [-92.35, 57.25], [-92.25, 57.0], [-92.47, 56.47], [-93.0, 56.25], [-93.25, 56.35], [-93.5, 56.25], [-93.75, 56.35], [-94.0, 56.25], [-94.53, 56.47], [-94.68, 56.82], [-95.03, 56.97], [-95.25, 57.5], [-95.15, 57.75], [-95.18, 57.82], [-95.53, 57.97], [-95.68, 58.32], [-96.03, 58.47], [-96.18, 58.82], [-96.53, 58.97], [-96.68, 59.32], [-97.03, 59.47], [-97.18, 59.82], [-97.53, 59.97], [-97.68, 60.32], [-98.03, 60.47], [-98.25, 61.0], [-98.15, 61.25], [-98.18, 61.32], [-98.53, 61.47], [-98.68, 61.82], [-99.03, 61.97], [-99.18, 62.32], [-99.53, 62.47], [-99.75, 63.0], [-99.65, 63.25], [-99.75, 63.5], [-99.53, 64.03]]]]}, "2010-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.03, 65.53], [-97.5, 65.75], [-96.97, 65.53], [-96.82, 65.18], [-96.47, 65.03], [-96.32, 64.68], [-96.25, 64.65], [-96.0, 64.75], [-95.47, 64.53], [-95.32, 64.18], [-95.25, 64.15], [-95.0, 64.25], [-94.47, 64.03], [-94.25, 63.5], [-94.35, 63.25], [-94.32, 63.18], [-94.25, 63.15], [-94.0, 63.25], [-93.75, 63.15], [-93.5, 63.25], [-93.0, 63.04], [-92.5, 63.25], [-91.97, 63.03], [-91.75, 62.5], [-91.97, 61.97], [-92.32, 61.82], [-92.47, 61.47], [-92.82, 61.32], [-92.97, 60.97], [-93.5, 60.75], [-93.75, 60.85], [-93.82, 60.82], [-93.97, 60.47], [-94.32, 60.32], [-94.47, 59.97], [-95.0, 59.75], [-95.25, 59.85], [-95.5, 59.75], [-96.03, 59.97], [-96.18, 60.32], [-96.53, 60.47], [-96.68, 60.82], [-97.03, 60.97], [-97.18, 61.32], [-97.53, 61.47], [-97.68, 61.82], [-97.75, 61.85], [-98.0, 61.75], [-98.53, 61.97], [-98.75, 62.5], [-98.53, 63.03], [-98.0, 63.25], [-98.53, 63.47], [-98.75, 64.0], [-98.53, 64.53], [-98.12, 64.7], [-98.25, 65.0], [-98.03, 65.53]], [[-97.75, 63.15], [-97.62, 63.2], [-97.68, 63.32], [-97.75, 63.35], [-98.0, 63.25], [-97.75, 63.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.871346937325598}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.218747592670178}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-29.369222351877937, -32.49163646503004, -31.485093755482893, -31.30136694462729, -29.867821445655807, -29.712229879043207, -29.306911048346336]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.703412220891664, -35.88550618449224, -34.945535204913114, -36.37487775890611, -33.08062290686837, -33.26170491081328, -31.09046343287943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.965870116886329, -10.229317714632108, -10.04241873811919, -11.102875629574473, -10.017125727636015, -10.173456211004266, -8.926629938924654]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.919000437325764, -12.401254282010655, -12.128721248788167, -14.871346937325598, -12.361198726236154, -11.93822836472259, -10.448875979801642]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3733390510441326, -1.5189583922643162, -1.422970140508632, -1.5512031258441545, -1.3846116296757012, -1.4127998722568271, -1.2735277774022704]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4195378757366381, -1.8718315303464679, -1.6784225456159376, -2.0689095005117553, -1.6557208080212624, -1.6290656700211326, -1.450064565265613]}}