{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:13:24.574002", "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-May-29_to_2020-May-31_135.5_61.5"}, "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": 2020050000747}, "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": "May 29 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 31 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 209835.5284012915}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 61.5}, "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": 135.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "135.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 128.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 138.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[127.47, 58.97], [127.25, 59.5], [127.47, 60.03], [128.0, 60.25], [128.25, 60.146], [128.323, 60.177], [128.47, 60.53], [129.0, 60.75], [129.25, 60.646], [129.5, 60.75], [129.75, 60.646], [129.823, 60.677], [129.97, 61.03], [130.5, 61.25], [130.75, 61.146], [130.823, 61.177], [130.97, 61.53], [131.375, 61.698], [131.323, 61.823], [130.97, 61.97], [130.823, 62.323], [130.47, 62.47], [130.25, 63.0], [130.47, 63.53], [131.0, 63.75], [131.25, 63.646], [131.323, 63.677], [131.47, 64.03], [132.0, 64.25], [132.25, 64.146], [132.5, 64.25], [132.75, 64.146], [133.0, 64.25], [133.25, 64.146], [133.5, 64.25], [133.75, 64.146], [134.0, 64.25], [134.25, 64.146], [134.5, 64.25], [134.75, 64.146], [135.0, 64.25], [135.25, 64.146], [135.323, 64.177], [135.47, 64.53], [135.823, 64.677], [135.97, 65.03], [136.5, 65.25], [137.03, 65.03], [137.177, 64.677], [137.25, 64.646], [137.5, 64.75], [137.75, 64.646], [138.0, 64.75], [138.53, 64.53], [138.75, 64.0], [138.53, 63.47], [138.0, 63.25], [137.75, 63.354], [137.625, 63.302], [137.677, 63.177], [138.03, 63.03], [138.177, 62.677], [138.53, 62.53], [138.75, 62.0], [138.646, 61.75], [138.75, 61.5], [138.646, 61.25], [138.75, 61.0], [138.53, 60.47], [138.177, 60.323], [138.03, 59.97], [137.677, 59.823], [137.53, 59.47], [137.177, 59.323], [137.03, 58.97], [136.5, 58.75], [136.25, 58.854], [136.0, 58.75], [135.75, 58.854], [135.5, 58.75], [135.25, 58.854], [135.0, 58.75], [134.75, 58.854], [134.5, 58.75], [134.25, 58.854], [134.0, 58.75], [133.75, 58.854], [133.677, 58.823], [133.53, 58.47], [133.177, 58.323], [133.03, 57.97], [132.5, 57.75], [132.25, 57.854], [132.0, 57.75], [131.75, 57.854], [131.5, 57.75], [131.25, 57.854], [131.0, 57.75], [130.47, 57.97], [130.302, 58.375], [130.0, 58.25], [129.75, 58.354], [129.5, 58.25], [129.25, 58.354], [129.0, 58.25], [128.47, 58.47], [128.323, 58.823], [128.25, 58.854], [128.0, 58.75], [127.47, 58.97]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "E.Siberia", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-05-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[128.25, 58.85355339059328], [128.0, 58.75], [127.46966991411009, 58.96966991411009], [127.25, 59.5], [127.46966991411009, 60.03033008588991], [128.0, 60.25], [128.25, 60.14644660940672], [128.32322330470336, 60.17677669529664], [128.46966991411009, 60.53033008588991], [129.0, 60.75], [129.25, 60.64644660940672], [129.5, 60.75], [129.75, 60.64644660940672], [129.82322330470336, 60.67677669529664], [129.96966991411009, 61.03033008588991], [130.5, 61.25], [130.75, 61.14644660940672], [130.82322330470336, 61.17677669529664], [130.96966991411009, 61.53033008588991], [131.375, 61.69822330470336], [131.32322330470336, 61.82322330470336], [130.96966991411009, 61.96966991411009], [130.82322330470336, 62.32322330470336], [130.46966991411009, 62.46966991411009], [130.25, 63.0], [130.46966991411009, 63.53033008588991], [131.0, 63.75], [131.25, 63.64644660940672], [131.32322330470336, 63.67677669529664], [131.46966991411009, 64.03033008588991], [132.0, 64.25], [132.25, 64.14644660940672], [132.5, 64.25], [132.75, 64.14644660940672], [133.0, 64.25], [133.25, 64.14644660940672], [133.5, 64.25], [133.75, 64.14644660940672], [134.0, 64.25], [134.25, 64.14644660940672], [134.5, 64.25], [134.75, 64.14644660940672], [135.0, 64.25], [135.25, 64.14644660940672], [135.32322330470336, 64.17677669529664], [135.46966991411009, 64.53033008588991], [135.82322330470336, 64.67677669529664], [135.96966991411009, 65.03033008588991], [136.5, 65.25], [137.03033008588991, 65.03033008588991], [137.17677669529664, 64.67677669529664], [137.25, 64.64644660940672], [137.5, 64.75], [137.75, 64.64644660940672], [138.0, 64.75], [138.53033008588991, 64.53033008588991], [138.75, 64.0], [138.53033008588991, 63.46966991411009], [138.0, 63.25], [137.75, 63.35355339059328], [137.625, 63.30177669529664], [137.67677669529664, 63.17677669529664], [138.03033008588991, 63.03033008588991], [138.17677669529664, 62.67677669529664], [138.53033008588991, 62.53033008588991], [138.75, 62.0], [138.64644660940672, 61.75], [138.75, 61.5], [138.64644660940672, 61.25], [138.75, 61.0], [138.53033008588991, 60.46966991411009], [138.17677669529664, 60.32322330470336], [138.03033008588991, 59.96966991411009], [137.67677669529664, 59.82322330470336], [137.53033008588991, 59.46966991411009], [137.17677669529664, 59.32322330470336], [137.03033008588991, 58.96966991411009], [136.5, 58.75], [136.25, 58.85355339059328], [136.0, 58.75], [135.75, 58.85355339059328], [135.5, 58.75], [135.25, 58.85355339059328], [135.0, 58.75], [134.75, 58.85355339059328], [134.5, 58.75], [134.25, 58.85355339059328], [134.0, 58.75], [133.75, 58.85355339059328], [133.67677669529664, 58.82322330470336], [133.53033008588991, 58.46966991411009], [133.17677669529664, 58.32322330470336], [133.03033008588991, 57.96966991411009], [132.5, 57.75], [132.25, 57.85355339059328], [132.0, 57.75], [131.75, 57.85355339059328], [131.5, 57.75], [131.25, 57.85355339059328], [131.0, 57.75], [130.46966991411009, 57.96966991411009], [130.30177669529664, 58.375], [130.0, 58.25], [129.75, 58.35355339059328], [129.5, 58.25], [129.25, 58.35355339059328], [129.0, 58.25], [128.46966991411009, 58.46966991411009], [128.32322330470336, 58.82322330470336], [128.25, 58.85355339059328]]]}, "2020-05-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[128.25, 58.85355339059328], [128.0, 58.75], [127.46966991411009, 58.96966991411009], [127.25, 59.5], [127.46966991411009, 60.03033008588991], [128.0, 60.25], [128.25, 60.14644660940672], [128.32322330470336, 60.17677669529664], [128.46966991411009, 60.53033008588991], [129.0, 60.75], [129.25, 60.64644660940672], [129.5, 60.75], [129.75, 60.64644660940672], [129.82322330470336, 60.67677669529664], [129.96966991411009, 61.03033008588991], [130.5, 61.25], [130.75, 61.14644660940672], [130.82322330470336, 61.17677669529664], [130.96966991411009, 61.53033008588991], [131.375, 61.69822330470336], [131.32322330470336, 61.82322330470336], [130.96966991411009, 61.96966991411009], [130.82322330470336, 62.32322330470336], [130.46966991411009, 62.46966991411009], [130.25, 63.0], [130.46966991411009, 63.53033008588991], [131.0, 63.75], [131.25, 63.64644660940672], [131.32322330470336, 63.67677669529664], [131.46966991411009, 64.03033008588991], [132.0, 64.25], [132.25, 64.14644660940672], [132.5, 64.25], [132.75, 64.14644660940672], [133.0, 64.25], [133.25, 64.14644660940672], [133.5, 64.25], [133.75, 64.14644660940672], [134.0, 64.25], [134.25, 64.14644660940672], [134.5, 64.25], [134.75, 64.14644660940672], [135.0, 64.25], [135.25, 64.14644660940672], [135.32322330470336, 64.17677669529664], [135.46966991411009, 64.53033008588991], [135.82322330470336, 64.67677669529664], [135.96966991411009, 65.03033008588991], [136.5, 65.25], [137.03033008588991, 65.03033008588991], [137.17677669529664, 64.67677669529664], [137.25, 64.64644660940672], [137.5, 64.75], [137.75, 64.64644660940672], [138.0, 64.75], [138.53033008588991, 64.53033008588991], [138.75, 64.0], [138.53033008588991, 63.46966991411009], [138.0, 63.25], [137.75, 63.35355339059328], [137.625, 63.30177669529664], [137.67677669529664, 63.17677669529664], [138.03033008588991, 63.03033008588991], [138.17677669529664, 62.67677669529664], [138.53033008588991, 62.53033008588991], [138.75, 62.0], [138.64644660940672, 61.75], [138.75, 61.5], [138.64644660940672, 61.25], [138.75, 61.0], [138.53033008588991, 60.46966991411009], [138.17677669529664, 60.32322330470336], [138.03033008588991, 59.96966991411009], [137.67677669529664, 59.82322330470336], [137.53033008588991, 59.46966991411009], [137.17677669529664, 59.32322330470336], [137.03033008588991, 58.96966991411009], [136.5, 58.75], [136.25, 58.85355339059328], [136.0, 58.75], [135.75, 58.85355339059328], [135.5, 58.75], [135.25, 58.85355339059328], [135.0, 58.75], [134.75, 58.85355339059328], [134.5, 58.75], [134.25, 58.85355339059328], [134.0, 58.75], [133.75, 58.85355339059328], [133.67677669529664, 58.82322330470336], [133.53033008588991, 58.46966991411009], [133.17677669529664, 58.32322330470336], [133.03033008588991, 57.96966991411009], [132.5, 57.75], [132.25, 57.85355339059328], [132.0, 57.75], [131.75, 57.85355339059328], [131.5, 57.75], [131.25, 57.85355339059328], [131.0, 57.75], [130.46966991411009, 57.96966991411009], [130.30177669529664, 58.375], [130.0, 58.25], [129.75, 58.35355339059328], [129.5, 58.25], [129.25, 58.35355339059328], [129.0, 58.25], [128.46966991411009, 58.46966991411009], [128.32322330470336, 58.82322330470336], [128.25, 58.85355339059328]]]}, "2020-05-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[128.25, 58.85355339059328], [128.0, 58.75], [127.46966991411009, 58.96966991411009], [127.25, 59.5], [127.46966991411009, 60.03033008588991], [128.0, 60.25], [128.25, 60.14644660940672], [128.32322330470336, 60.17677669529664], [128.46966991411009, 60.53033008588991], [129.0, 60.75], [129.25, 60.64644660940672], [129.5, 60.75], [129.75, 60.64644660940672], [129.82322330470336, 60.67677669529664], [129.96966991411009, 61.03033008588991], [130.5, 61.25], [130.75, 61.14644660940672], [130.82322330470336, 61.17677669529664], [130.96966991411009, 61.53033008588991], [131.375, 61.69822330470336], [131.32322330470336, 61.82322330470336], [130.96966991411009, 61.96966991411009], [130.82322330470336, 62.32322330470336], [130.46966991411009, 62.46966991411009], [130.25, 63.0], [130.46966991411009, 63.53033008588991], [131.0, 63.75], [131.25, 63.64644660940672], [131.32322330470336, 63.67677669529664], [131.46966991411009, 64.03033008588991], [132.0, 64.25], [132.25, 64.14644660940672], [132.5, 64.25], [132.75, 64.14644660940672], [133.0, 64.25], [133.25, 64.14644660940672], [133.5, 64.25], [133.75, 64.14644660940672], [134.0, 64.25], [134.25, 64.14644660940672], [134.5, 64.25], [134.75, 64.14644660940672], [135.0, 64.25], [135.25, 64.14644660940672], [135.32322330470336, 64.17677669529664], [135.46966991411009, 64.53033008588991], [135.82322330470336, 64.67677669529664], [135.96966991411009, 65.03033008588991], [136.5, 65.25], [137.03033008588991, 65.03033008588991], [137.17677669529664, 64.67677669529664], [137.25, 64.64644660940672], [137.5, 64.75], [137.75, 64.64644660940672], [138.0, 64.75], [138.53033008588991, 64.53033008588991], [138.75, 64.0], [138.53033008588991, 63.46966991411009], [138.0, 63.25], [137.75, 63.35355339059328], [137.625, 63.30177669529664], [137.67677669529664, 63.17677669529664], [138.03033008588991, 63.03033008588991], [138.17677669529664, 62.67677669529664], [138.53033008588991, 62.53033008588991], [138.75, 62.0], [138.64644660940672, 61.75], [138.75, 61.5], [138.64644660940672, 61.25], [138.75, 61.0], [138.53033008588991, 60.46966991411009], [138.17677669529664, 60.32322330470336], [138.03033008588991, 59.96966991411009], [137.67677669529664, 59.82322330470336], [137.53033008588991, 59.46966991411009], [137.17677669529664, 59.32322330470336], [137.03033008588991, 58.96966991411009], [136.5, 58.75], [136.25, 58.85355339059328], [136.0, 58.75], [135.75, 58.85355339059328], [135.5, 58.75], [135.25, 58.85355339059328], [135.0, 58.75], [134.75, 58.85355339059328], [134.5, 58.75], [134.25, 58.85355339059328], [134.0, 58.75], [133.75, 58.85355339059328], [133.67677669529664, 58.82322330470336], [133.53033008588991, 58.46966991411009], [133.17677669529664, 58.32322330470336], [133.03033008588991, 57.96966991411009], [132.5, 57.75], [132.25, 57.85355339059328], [132.0, 57.75], [131.75, 57.85355339059328], [131.5, 57.75], [131.25, 57.85355339059328], [131.0, 57.75], [130.46966991411009, 57.96966991411009], [130.30177669529664, 58.375], [130.0, 58.25], [129.75, 58.35355339059328], [129.5, 58.25], [129.25, 58.35355339059328], [129.0, 58.25], [128.46966991411009, 58.46966991411009], [128.32322330470336, 58.82322330470336], [128.25, 58.85355339059328]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.885909653998453}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.734709512988538}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.268341741467282, 4.315681942086599, 6.220724894475666]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.2633747183779747, -0.7107476165480193, 0.7896427924994214]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.020054414863214, -7.439662043369119, -5.744412080733252]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.885909653998453, -8.346385694142725, -6.4939700572084575]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9660488989112384, -2.0890699481595454, -1.5917797187819047]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.410686047232188, -2.4647284190616614, -1.894513373830933]}}