{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:15.615015", "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": "2020-Nov-16_to_2020-Nov-20_41.0_49.5"}, "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": 2020110000539}, "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": "November 16 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 20 2020"}, "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": 102225.91939754519}, "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": ["Russian Federation", "Ukraine"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe"]}, "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": 49.5}, "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": 41.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "41.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[40.75, 50.646], [41.0, 50.75], [41.25, 50.646], [41.5, 50.75], [42.03, 50.53], [42.177, 50.177], [42.53, 50.03], [42.75, 49.5], [42.646, 49.25], [42.656, 49.226], [42.677, 49.177], [42.75, 49.146], [43.0, 49.25], [43.53, 49.03], [43.75, 48.5], [43.646, 48.25], [43.75, 48.0], [43.53, 47.47], [43.0, 47.25], [42.47, 47.47], [42.323, 47.823], [42.0, 47.957], [41.5, 47.75], [41.25, 47.854], [41.249, 47.854], [41.0, 47.75], [40.751, 47.854], [40.75, 47.854], [40.5, 47.75], [40.25, 47.854], [40.249, 47.854], [40.0, 47.75], [39.751, 47.854], [39.75, 47.854], [39.703, 47.834], [39.677, 47.823], [39.53, 47.47], [39.0, 47.25], [38.47, 47.47], [38.323, 47.823], [37.97, 47.97], [37.823, 48.323], [37.47, 48.47], [37.323, 48.823], [37.25, 48.854], [37.0, 48.75], [36.47, 48.97], [36.25, 49.5], [36.47, 50.03], [36.823, 50.177], [36.854, 50.25], [36.75, 50.5], [36.854, 50.75], [36.75, 51.0], [36.97, 51.53], [37.323, 51.677], [37.47, 52.03], [38.0, 52.25], [38.25, 52.146], [38.5, 52.25], [38.75, 52.146], [39.0, 52.25], [39.53, 52.03], [39.75, 51.5], [39.625, 51.198], [40.03, 51.03], [40.177, 50.677], [40.25, 50.646], [40.5, 50.75], [40.75, 50.646]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe", "E.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-11-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.82322330470336, 50.17677669529664], [36.85355339059328, 50.25], [36.75, 50.5], [36.85355339059328, 50.75], [36.75, 51.0], [36.96966991411009, 51.53033008588991], [37.5, 51.75], [37.75, 51.64644660940672], [38.0, 51.75], [38.25, 51.64644660940672], [38.5, 51.75], [39.03033008588991, 51.53033008588991], [39.17677669529664, 51.17677669529664], [39.25, 51.14644660940672], [39.5, 51.25], [40.03033008588991, 51.03033008588991], [40.17677669529664, 50.67677669529664], [40.25, 50.64644660940672], [40.5, 50.75], [40.75, 50.64644660940672], [41.0, 50.75], [41.53033008588991, 50.53033008588991], [41.67677669529664, 50.17677669529664], [42.03033008588991, 50.03033008588991], [42.17677669529664, 49.67677669529664], [42.53033008588991, 49.53033008588991], [42.75, 49.0], [42.53033008588991, 48.46966991411009], [42.17677669529664, 48.32322330470336], [42.03033008588991, 47.96966991411009], [41.5, 47.75], [41.0, 47.95710678118655], [40.5, 47.75], [40.0, 47.95710678118655], [39.5, 47.75], [39.25, 47.85355339059328], [39.0, 47.75], [38.75, 47.85355339059328], [38.5, 47.75], [37.96966991411009, 47.96966991411009], [37.82322330470336, 48.32322330470336], [37.46966991411009, 48.46966991411009], [37.32322330470336, 48.82322330470336], [37.25, 48.85355339059328], [37.0, 48.75], [36.46966991411009, 48.96966991411009], [36.25, 49.5], [36.46966991411009, 50.03033008588991], [36.82322330470336, 50.17677669529664]]]}, "2020-11-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.82322330470336, 50.17677669529664], [36.85355339059328, 50.25], [36.75, 50.5], [36.85355339059328, 50.75], [36.75, 51.0], [36.96966991411009, 51.53033008588991], [37.32322330470336, 51.67677669529664], [37.46966991411009, 52.03033008588991], [38.0, 52.25], [38.25, 52.14644660940672], [38.5, 52.25], [38.75, 52.14644660940672], [39.0, 52.25], [39.53033008588991, 52.03033008588991], [39.75, 51.5], [39.625, 51.19822330470336], [40.03033008588991, 51.03033008588991], [40.17677669529664, 50.67677669529664], [40.25, 50.64644660940672], [40.5, 50.75], [40.75, 50.64644660940672], [41.0, 50.75], [41.25, 50.64644660940672], [41.5, 50.75], [42.03033008588991, 50.53033008588991], [42.17677669529664, 50.17677669529664], [42.53033008588991, 50.03033008588991], [42.75, 49.5], [42.64644660940672, 49.25], [42.67677669529664, 49.17677669529664], [42.75, 49.14644660940672], [43.0, 49.25], [43.53033008588991, 49.03033008588991], [43.75, 48.5], [43.64644660940672, 48.25], [43.75, 48.0], [43.53033008588991, 47.46966991411009], [43.0, 47.25], [42.46966991411009, 47.46966991411009], [42.32322330470336, 47.82322330470336], [42.0, 47.95710678118655], [41.5, 47.75], [41.25, 47.85355339059328], [41.0, 47.75], [40.75, 47.85355339059328], [40.5, 47.75], [40.25, 47.85355339059328], [40.0, 47.75], [39.75, 47.85355339059328], [39.67677669529664, 47.82322330470336], [39.53033008588991, 47.46966991411009], [39.0, 47.25], [38.46966991411009, 47.46966991411009], [38.32322330470336, 47.82322330470336], [37.96966991411009, 47.96966991411009], [37.82322330470336, 48.32322330470336], [37.46966991411009, 48.46966991411009], [37.32322330470336, 48.82322330470336], [37.25, 48.85355339059328], [37.0, 48.75], [36.46966991411009, 48.96966991411009], [36.25, 49.5], [36.46966991411009, 50.03033008588991], [36.82322330470336, 50.17677669529664]]]}, "2020-11-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.82322330470336, 50.17677669529664], [36.85355339059328, 50.25], [36.75, 50.5], [36.85355339059328, 50.75], [36.75, 51.0], [36.96966991411009, 51.53033008588991], [37.32322330470336, 51.67677669529664], [37.46966991411009, 52.03033008588991], [38.0, 52.25], [38.25, 52.14644660940672], [38.5, 52.25], [38.75, 52.14644660940672], [39.0, 52.25], [39.53033008588991, 52.03033008588991], [39.75, 51.5], [39.625, 51.19822330470336], [40.03033008588991, 51.03033008588991], [40.17677669529664, 50.67677669529664], [40.25, 50.64644660940672], [40.5, 50.75], [40.75, 50.64644660940672], [41.0, 50.75], [41.25, 50.64644660940672], [41.5, 50.75], [42.03033008588991, 50.53033008588991], [42.17677669529664, 50.17677669529664], [42.53033008588991, 50.03033008588991], [42.75, 49.5], [42.64644660940672, 49.25], [42.67677669529664, 49.17677669529664], [42.75, 49.14644660940672], [43.0, 49.25], [43.53033008588991, 49.03033008588991], [43.75, 48.5], [43.64644660940672, 48.25], [43.75, 48.0], [43.53033008588991, 47.46966991411009], [43.0, 47.25], [42.46966991411009, 47.46966991411009], [42.32322330470336, 47.82322330470336], [42.0, 47.95710678118655], [41.5, 47.75], [41.25, 47.85355339059328], [41.0, 47.75], [40.75, 47.85355339059328], [40.5, 47.75], [40.25, 47.85355339059328], [40.0, 47.75], [39.75, 47.85355339059328], [39.67677669529664, 47.82322330470336], [39.53033008588991, 47.46966991411009], [39.0, 47.25], [38.46966991411009, 47.46966991411009], [38.32322330470336, 47.82322330470336], [37.96966991411009, 47.96966991411009], [37.82322330470336, 48.32322330470336], [37.46966991411009, 48.46966991411009], [37.32322330470336, 48.82322330470336], [37.25, 48.85355339059328], [37.0, 48.75], [36.46966991411009, 48.96966991411009], [36.25, 49.5], [36.46966991411009, 50.03033008588991], [36.82322330470336, 50.17677669529664]]]}, "2020-11-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 50.25], [36.75, 50.5], [36.85355339059328, 50.75], [36.75, 51.0], [36.96966991411009, 51.53033008588991], [37.32322330470336, 51.67677669529664], [37.46966991411009, 52.03033008588991], [38.0, 52.25], [38.25, 52.14644660940672], [38.5, 52.25], [38.75, 52.14644660940672], [39.0, 52.25], [39.53033008588991, 52.03033008588991], [39.75, 51.5], [39.625, 51.19822330470336], [40.03033008588991, 51.03033008588991], [40.17677669529664, 50.67677669529664], [40.25, 50.64644660940672], [40.5, 50.75], [40.75, 50.64644660940672], [41.0, 50.75], [41.25, 50.64644660940672], [41.5, 50.75], [42.03033008588991, 50.53033008588991], [42.17677669529664, 50.17677669529664], [42.53033008588991, 50.03033008588991], [42.75, 49.5], [42.64644660940672, 49.25], [42.67677669529664, 49.17677669529664], [42.75, 49.14644660940672], [43.0, 49.25], [43.53033008588991, 49.03033008588991], [43.75, 48.5], [43.64644660940672, 48.25], [43.75, 48.0], [43.53033008588991, 47.46966991411009], [43.0, 47.25], [42.46966991411009, 47.46966991411009], [42.32322330470336, 47.82322330470336], [42.0, 47.95710678118655], [41.5, 47.75], [41.25, 47.85355339059328], [41.0, 47.75], [40.75, 47.85355339059328], [40.5, 47.75], [40.25, 47.85355339059328], [40.0, 47.75], [39.75, 47.85355339059328], [39.67677669529664, 47.82322330470336], [39.53033008588991, 47.46966991411009], [39.0, 47.25], [38.46966991411009, 47.46966991411009], [38.32322330470336, 47.82322330470336], [37.96966991411009, 47.96966991411009], [37.82322330470336, 48.32322330470336], [37.46966991411009, 48.46966991411009], [37.25, 49.0], [37.35355339059328, 49.25], [37.32322330470336, 49.32322330470336], [36.96966991411009, 49.46966991411009], [36.75, 50.0], [36.85355339059328, 50.25]]]}, "2020-11-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[38.82322330470336, 48.82322330470336], [38.46966991411009, 48.96966991411009], [38.25, 49.5], [38.46966991411009, 50.03033008588991], [39.0, 50.25], [39.25, 50.14644660940672], [39.5, 50.25], [39.75, 50.14644660940672], [39.82322330470336, 50.17677669529664], [39.96966991411009, 50.53033008588991], [40.5, 50.75], [40.75, 50.64644660940672], [41.0, 50.75], [41.53033008588991, 50.53033008588991], [41.67677669529664, 50.17677669529664], [42.03033008588991, 50.03033008588991], [42.17677669529664, 49.67677669529664], [42.53033008588991, 49.53033008588991], [42.75, 49.0], [42.53033008588991, 48.46966991411009], [42.0, 48.25], [41.75, 48.35355339059328], [41.5, 48.25], [41.25, 48.35355339059328], [41.0, 48.25], [40.75, 48.35355339059328], [40.5, 48.25], [40.25, 48.35355339059328], [40.0, 48.25], [39.75, 48.35355339059328], [39.5, 48.25], [38.96966991411009, 48.46966991411009], [38.82322330470336, 48.82322330470336]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.888484173778693}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.751653590563482}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.5005733568035, -5.332618907156643, -7.9226301623699555, -9.623944545235474, -7.679674585247312]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.680809607327262, -6.7673473165361315, -10.743207072797873, -13.810495340989348, -9.464007446917037]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.71050030541069, -6.279390072968072, -8.610669455530374, -10.036608948448073, -7.820149958693524]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.070804010804352, -6.8417831961074285, -11.095066965365504, -13.888484173778693, -9.17109350496139]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2584072308296195, -1.3432754919007661, -1.7383729589304713, -1.9207126564923014, -1.4496319552658792]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3384515806012611, -1.4609907352380573, -2.1704789366853543, -2.5428213316416564, -1.6171841731174688]}}