{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:25:06.356588", "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-09_to_2021-Jun-11_90.0_57.5"}, "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": 2021060000440}, "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 09 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 11 2021"}, "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": 115626.6626012112}, "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": 57.5}, "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": 90.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "90.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 95.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[84.75, 57.5], [84.97, 58.03], [85.5, 58.25], [85.75, 58.146], [86.0, 58.25], [86.25, 58.146], [86.323, 58.177], [86.47, 58.53], [87.0, 58.75], [87.5, 58.543], [88.0, 58.75], [88.25, 58.646], [88.5, 58.75], [88.75, 58.646], [89.0, 58.75], [89.25, 58.646], [89.323, 58.677], [89.47, 59.03], [90.0, 59.25], [90.5, 59.043], [90.823, 59.177], [90.97, 59.53], [91.5, 59.75], [92.03, 59.53], [92.177, 59.177], [92.25, 59.146], [92.323, 59.177], [92.47, 59.53], [93.0, 59.75], [93.25, 59.646], [93.323, 59.677], [93.47, 60.03], [94.0, 60.25], [94.25, 60.146], [94.323, 60.177], [94.47, 60.53], [95.0, 60.75], [95.25, 60.646], [95.5, 60.75], [96.03, 60.53], [96.25, 60.0], [96.03, 59.47], [95.677, 59.323], [95.53, 58.97], [95.177, 58.823], [95.03, 58.47], [94.677, 58.323], [94.646, 58.25], [94.75, 58.0], [94.53, 57.47], [94.0, 57.25], [93.75, 57.354], [93.5, 57.25], [93.25, 57.354], [93.177, 57.323], [93.03, 56.97], [92.677, 56.823], [92.53, 56.47], [92.177, 56.323], [92.03, 55.97], [91.5, 55.75], [91.25, 55.854], [91.0, 55.75], [90.75, 55.854], [90.5, 55.75], [90.25, 55.854], [90.177, 55.823], [90.03, 55.47], [89.677, 55.323], [89.53, 54.97], [89.0, 54.75], [88.75, 54.854], [88.5, 54.75], [87.97, 54.97], [87.75, 55.5], [87.957, 56.0], [87.823, 56.323], [87.75, 56.354], [87.5, 56.25], [87.0, 56.457], [86.5, 56.25], [86.25, 56.354], [86.0, 56.25], [85.47, 56.47], [85.323, 56.823], [84.97, 56.97], [84.75, 57.5]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Siberia", "E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[85.32322330470336, 56.82322330470336], [84.96966991411009, 56.96966991411009], [84.75, 57.5], [84.96966991411009, 58.03033008588991], [85.5, 58.25], [85.75, 58.14644660940672], [86.0, 58.25], [86.25, 58.14644660940672], [86.32322330470336, 58.17677669529664], [86.46966991411009, 58.53033008588991], [87.0, 58.75], [87.5, 58.542893218813454], [88.0, 58.75], [88.25, 58.64644660940672], [88.5, 58.75], [88.75, 58.64644660940672], [89.0, 58.75], [89.25, 58.64644660940672], [89.32322330470336, 58.67677669529664], [89.46966991411009, 59.03033008588991], [90.0, 59.25], [90.5, 59.042893218813454], [90.82322330470336, 59.17677669529664], [90.96966991411009, 59.53033008588991], [91.5, 59.75], [92.03033008588991, 59.53033008588991], [92.17677669529664, 59.17677669529664], [92.25, 59.14644660940672], [92.32322330470336, 59.17677669529664], [92.46966991411009, 59.53033008588991], [93.0, 59.75], [93.25, 59.64644660940672], [93.32322330470336, 59.67677669529664], [93.46966991411009, 60.03033008588991], [94.0, 60.25], [94.25, 60.14644660940672], [94.32322330470336, 60.17677669529664], [94.46966991411009, 60.53033008588991], [95.0, 60.75], [95.25, 60.64644660940672], [95.5, 60.75], [96.03033008588991, 60.53033008588991], [96.25, 60.0], [96.03033008588991, 59.46966991411009], [95.67677669529664, 59.32322330470336], [95.53033008588991, 58.96966991411009], [95.17677669529664, 58.82322330470336], [95.03033008588991, 58.46966991411009], [94.67677669529664, 58.32322330470336], [94.64644660940672, 58.25], [94.75, 58.0], [94.53033008588991, 57.46966991411009], [94.0, 57.25], [93.75, 57.35355339059328], [93.5, 57.25], [93.25, 57.35355339059328], [93.17677669529664, 57.32322330470336], [93.03033008588991, 56.96966991411009], [92.67677669529664, 56.82322330470336], [92.53033008588991, 56.46966991411009], [92.17677669529664, 56.32322330470336], [92.03033008588991, 55.96966991411009], [91.5, 55.75], [91.25, 55.85355339059328], [91.0, 55.75], [90.75, 55.85355339059328], [90.5, 55.75], [90.25, 55.85355339059328], [90.17677669529664, 55.82322330470336], [90.03033008588991, 55.46966991411009], [89.67677669529664, 55.32322330470336], [89.53033008588991, 54.96966991411009], [89.0, 54.75], [88.75, 54.85355339059328], [88.5, 54.75], [87.96966991411009, 54.96966991411009], [87.75, 55.5], [87.95710678118654, 56.0], [87.82322330470336, 56.32322330470336], [87.75, 56.35355339059328], [87.5, 56.25], [87.0, 56.457106781186546], [86.5, 56.25], [86.25, 56.35355339059328], [86.0, 56.25], [85.46966991411009, 56.46966991411009], [85.32322330470336, 56.82322330470336]]]}, "2021-06-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[85.32322330470336, 56.82322330470336], [84.96966991411009, 56.96966991411009], [84.75, 57.5], [84.96966991411009, 58.03033008588991], [85.5, 58.25], [85.75, 58.14644660940672], [86.0, 58.25], [86.25, 58.14644660940672], [86.32322330470336, 58.17677669529664], [86.46966991411009, 58.53033008588991], [87.0, 58.75], [87.5, 58.542893218813454], [88.0, 58.75], [88.25, 58.64644660940672], [88.5, 58.75], [88.75, 58.64644660940672], [89.0, 58.75], [89.25, 58.64644660940672], [89.32322330470336, 58.67677669529664], [89.46966991411009, 59.03033008588991], [90.0, 59.25], [90.5, 59.042893218813454], [90.82322330470336, 59.17677669529664], [90.96966991411009, 59.53033008588991], [91.5, 59.75], [92.03033008588991, 59.53033008588991], [92.17677669529664, 59.17677669529664], [92.25, 59.14644660940672], [92.32322330470336, 59.17677669529664], [92.46966991411009, 59.53033008588991], [93.0, 59.75], [93.25, 59.64644660940672], [93.32322330470336, 59.67677669529664], [93.46966991411009, 60.03033008588991], [94.0, 60.25], [94.25, 60.14644660940672], [94.32322330470336, 60.17677669529664], [94.46966991411009, 60.53033008588991], [95.0, 60.75], [95.25, 60.64644660940672], [95.5, 60.75], [96.03033008588991, 60.53033008588991], [96.25, 60.0], [96.03033008588991, 59.46966991411009], [95.67677669529664, 59.32322330470336], [95.53033008588991, 58.96966991411009], [95.17677669529664, 58.82322330470336], [95.03033008588991, 58.46966991411009], [94.67677669529664, 58.32322330470336], [94.64644660940672, 58.25], [94.75, 58.0], [94.53033008588991, 57.46966991411009], [94.0, 57.25], [93.75, 57.35355339059328], [93.5, 57.25], [93.25, 57.35355339059328], [93.17677669529664, 57.32322330470336], [93.03033008588991, 56.96966991411009], [92.67677669529664, 56.82322330470336], [92.53033008588991, 56.46966991411009], [92.17677669529664, 56.32322330470336], [92.03033008588991, 55.96966991411009], [91.5, 55.75], [91.25, 55.85355339059328], [91.0, 55.75], [90.75, 55.85355339059328], [90.5, 55.75], [90.25, 55.85355339059328], [90.17677669529664, 55.82322330470336], [90.03033008588991, 55.46966991411009], [89.67677669529664, 55.32322330470336], [89.53033008588991, 54.96966991411009], [89.0, 54.75], [88.75, 54.85355339059328], [88.5, 54.75], [87.96966991411009, 54.96966991411009], [87.75, 55.5], [87.95710678118654, 56.0], [87.82322330470336, 56.32322330470336], [87.75, 56.35355339059328], [87.5, 56.25], [87.0, 56.457106781186546], [86.5, 56.25], [86.25, 56.35355339059328], [86.0, 56.25], [85.46966991411009, 56.46966991411009], [85.32322330470336, 56.82322330470336]]]}, "2021-06-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[85.32322330470336, 56.82322330470336], [84.96966991411009, 56.96966991411009], [84.75, 57.5], [84.96966991411009, 58.03033008588991], [85.5, 58.25], [85.75, 58.14644660940672], [86.0, 58.25], [86.25, 58.14644660940672], [86.32322330470336, 58.17677669529664], [86.46966991411009, 58.53033008588991], [87.0, 58.75], [87.5, 58.542893218813454], [88.0, 58.75], [88.25, 58.64644660940672], [88.5, 58.75], [88.75, 58.64644660940672], [89.0, 58.75], [89.25, 58.64644660940672], [89.32322330470336, 58.67677669529664], [89.46966991411009, 59.03033008588991], [90.0, 59.25], [90.5, 59.042893218813454], [90.82322330470336, 59.17677669529664], [90.96966991411009, 59.53033008588991], [91.5, 59.75], [92.03033008588991, 59.53033008588991], [92.17677669529664, 59.17677669529664], [92.25, 59.14644660940672], [92.32322330470336, 59.17677669529664], [92.46966991411009, 59.53033008588991], [93.0, 59.75], [93.25, 59.64644660940672], [93.32322330470336, 59.67677669529664], [93.46966991411009, 60.03033008588991], [94.0, 60.25], [94.25, 60.14644660940672], [94.32322330470336, 60.17677669529664], [94.46966991411009, 60.53033008588991], [95.0, 60.75], [95.25, 60.64644660940672], [95.5, 60.75], [96.03033008588991, 60.53033008588991], [96.25, 60.0], [96.03033008588991, 59.46966991411009], [95.67677669529664, 59.32322330470336], [95.53033008588991, 58.96966991411009], [95.17677669529664, 58.82322330470336], [95.03033008588991, 58.46966991411009], [94.67677669529664, 58.32322330470336], [94.64644660940672, 58.25], [94.75, 58.0], [94.53033008588991, 57.46966991411009], [94.0, 57.25], [93.75, 57.35355339059328], [93.5, 57.25], [93.25, 57.35355339059328], [93.17677669529664, 57.32322330470336], [93.03033008588991, 56.96966991411009], [92.67677669529664, 56.82322330470336], [92.53033008588991, 56.46966991411009], [92.17677669529664, 56.32322330470336], [92.03033008588991, 55.96966991411009], [91.5, 55.75], [91.25, 55.85355339059328], [91.0, 55.75], [90.75, 55.85355339059328], [90.5, 55.75], [90.25, 55.85355339059328], [90.17677669529664, 55.82322330470336], [90.03033008588991, 55.46966991411009], [89.67677669529664, 55.32322330470336], [89.53033008588991, 54.96966991411009], [89.0, 54.75], [88.75, 54.85355339059328], [88.5, 54.75], [87.96966991411009, 54.96966991411009], [87.75, 55.5], [87.95710678118654, 56.0], [87.82322330470336, 56.32322330470336], [87.75, 56.35355339059328], [87.5, 56.25], [87.0, 56.457106781186546], [86.5, 56.25], [86.25, 56.35355339059328], [86.0, 56.25], [85.46966991411009, 56.46966991411009], [85.32322330470336, 56.82322330470336]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.633361479843472}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.099282038261773}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.419279218999804, 8.242601560939477, 9.622835008087748]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.806544521491048, 5.628314829785893, 7.868683811662152]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.318424233109116, -7.664923013263865, -6.314498868412343]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.316031043461749, -8.633361479843472, -6.929826066005148]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7191882580578022, -1.8244002055767905, -1.5021793909313346]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.925873403563185, -2.0855008604247787, -1.6559331614426926]}}