{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:02.374370", "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-Jul-06_to_2021-Jul-09_57.0_50.0"}, "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": 2021070000358}, "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": "July 06 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 58398.02703098809}, "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": ["Kazakhstan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 50.0}, "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": 57.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "57.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 54.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 60.0}, "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": 50.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[54.47, 49.53], [54.823, 49.677], [54.97, 50.03], [55.5, 50.25], [55.75, 50.146], [55.823, 50.177], [55.97, 50.53], [56.5, 50.75], [56.75, 50.646], [57.0, 50.75], [57.25, 50.646], [57.323, 50.677], [57.47, 51.03], [58.0, 51.25], [58.53, 51.03], [58.677, 50.677], [58.75, 50.646], [59.0, 50.75], [59.25, 50.646], [59.5, 50.75], [59.75, 50.646], [60.0, 50.75], [60.53, 50.53], [60.75, 50.0], [60.53, 49.47], [60.177, 49.323], [60.03, 48.97], [59.5, 48.75], [59.25, 48.854], [59.0, 48.75], [58.75, 48.854], [58.5, 48.75], [58.25, 48.854], [58.0, 48.75], [57.75, 48.854], [57.677, 48.823], [57.53, 48.47], [57.0, 48.25], [56.75, 48.354], [56.677, 48.323], [56.53, 47.97], [56.0, 47.75], [55.75, 47.854], [55.5, 47.75], [55.25, 47.854], [55.177, 47.823], [55.03, 47.47], [54.5, 47.25], [54.25, 47.354], [54.0, 47.25], [53.47, 47.47], [53.25, 48.0], [53.47, 48.53], [53.823, 48.677], [53.97, 49.03], [54.323, 49.177], [54.47, 49.53]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Europe", "W.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[56.75, 49.35355339059328], [56.5, 49.25], [55.96966991411009, 49.46966991411009], [55.75, 50.0], [55.96966991411009, 50.53033008588991], [56.5, 50.75], [56.75, 50.64644660940672], [57.0, 50.75], [57.25, 50.64644660940672], [57.32322330470336, 50.67677669529664], [57.46966991411009, 51.03033008588991], [58.0, 51.25], [58.53033008588991, 51.03033008588991], [58.67677669529664, 50.67677669529664], [58.75, 50.64644660940672], [59.0, 50.75], [59.25, 50.64644660940672], [59.5, 50.75], [60.03033008588991, 50.53033008588991], [60.25, 50.0], [60.03033008588991, 49.46966991411009], [59.5, 49.25], [59.25, 49.35355339059328], [59.0, 49.25], [58.75, 49.35355339059328], [58.5, 49.25], [58.25, 49.35355339059328], [58.0, 49.25], [57.75, 49.35355339059328], [57.5, 49.25], [57.25, 49.35355339059328], [57.0, 49.25], [56.75, 49.35355339059328]]]}, "2021-07-07T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.82322330470336, 48.67677669529664], [53.96966991411009, 49.03033008588991], [54.32322330470336, 49.17677669529664], [54.46966991411009, 49.53033008588991], [54.82322330470336, 49.67677669529664], [54.96966991411009, 50.03033008588991], [55.5, 50.25], [55.75, 50.14644660940672], [55.82322330470336, 50.17677669529664], [55.96966991411009, 50.53033008588991], [56.5, 50.75], [56.75, 50.64644660940672], [57.0, 50.75], [57.25, 50.64644660940672], [57.32322330470336, 50.67677669529664], [57.46966991411009, 51.03033008588991], [58.0, 51.25], [58.53033008588991, 51.03033008588991], [58.67677669529664, 50.67677669529664], [58.75, 50.64644660940672], [59.0, 50.75], [59.25, 50.64644660940672], [59.5, 50.75], [59.75, 50.64644660940672], [60.0, 50.75], [60.53033008588991, 50.53033008588991], [60.75, 50.0], [60.53033008588991, 49.46966991411009], [60.17677669529664, 49.32322330470336], [60.03033008588991, 48.96966991411009], [59.5, 48.75], [59.25, 48.85355339059328], [59.0, 48.75], [58.75, 48.85355339059328], [58.5, 48.75], [58.25, 48.85355339059328], [58.0, 48.75], [57.75, 48.85355339059328], [57.67677669529664, 48.82322330470336], [57.53033008588991, 48.46966991411009], [57.0, 48.25], [56.75, 48.35355339059328], [56.67677669529664, 48.32322330470336], [56.53033008588991, 47.96966991411009], [56.0, 47.75], [55.75, 47.85355339059328], [55.5, 47.75], [55.25, 47.85355339059328], [55.17677669529664, 47.82322330470336], [55.03033008588991, 47.46966991411009], [54.5, 47.25], [54.25, 47.35355339059328], [54.0, 47.25], [53.46966991411009, 47.46966991411009], [53.25, 48.0], [53.46966991411009, 48.53033008588991], [53.82322330470336, 48.67677669529664]]]}, "2021-07-08T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.82322330470336, 48.67677669529664], [53.96966991411009, 49.03033008588991], [54.32322330470336, 49.17677669529664], [54.46966991411009, 49.53033008588991], [54.82322330470336, 49.67677669529664], [54.96966991411009, 50.03033008588991], [55.5, 50.25], [55.75, 50.14644660940672], [55.82322330470336, 50.17677669529664], [55.96966991411009, 50.53033008588991], [56.5, 50.75], [56.75, 50.64644660940672], [57.0, 50.75], [57.25, 50.64644660940672], [57.32322330470336, 50.67677669529664], [57.46966991411009, 51.03033008588991], [58.0, 51.25], [58.53033008588991, 51.03033008588991], [58.67677669529664, 50.67677669529664], [58.75, 50.64644660940672], [59.0, 50.75], [59.25, 50.64644660940672], [59.5, 50.75], [59.75, 50.64644660940672], [60.0, 50.75], [60.53033008588991, 50.53033008588991], [60.75, 50.0], [60.53033008588991, 49.46966991411009], [60.17677669529664, 49.32322330470336], [60.03033008588991, 48.96966991411009], [59.5, 48.75], [59.25, 48.85355339059328], [59.0, 48.75], [58.75, 48.85355339059328], [58.5, 48.75], [58.25, 48.85355339059328], [58.0, 48.75], [57.75, 48.85355339059328], [57.67677669529664, 48.82322330470336], [57.53033008588991, 48.46966991411009], [57.0, 48.25], [56.75, 48.35355339059328], [56.67677669529664, 48.32322330470336], [56.53033008588991, 47.96966991411009], [56.0, 47.75], [55.75, 47.85355339059328], [55.5, 47.75], [55.25, 47.85355339059328], [55.17677669529664, 47.82322330470336], [55.03033008588991, 47.46966991411009], [54.5, 47.25], [54.25, 47.35355339059328], [54.0, 47.25], [53.46966991411009, 47.46966991411009], [53.25, 48.0], [53.46966991411009, 48.53033008588991], [53.82322330470336, 48.67677669529664]]]}, "2021-07-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.82322330470336, 48.67677669529664], [53.96966991411009, 49.03033008588991], [54.32322330470336, 49.17677669529664], [54.46966991411009, 49.53033008588991], [54.82322330470336, 49.67677669529664], [54.96966991411009, 50.03033008588991], [55.5, 50.25], [55.75, 50.14644660940672], [56.0, 50.25], [56.25, 50.14644660940672], [56.32322330470336, 50.17677669529664], [56.46966991411009, 50.53033008588991], [57.0, 50.75], [57.25, 50.64644660940672], [57.5, 50.75], [57.75, 50.64644660940672], [58.0, 50.75], [58.25, 50.64644660940672], [58.5, 50.75], [58.75, 50.64644660940672], [59.0, 50.75], [59.25, 50.64644660940672], [59.5, 50.75], [59.75, 50.64644660940672], [60.0, 50.75], [60.53033008588991, 50.53033008588991], [60.75, 50.0], [60.53033008588991, 49.46966991411009], [60.17677669529664, 49.32322330470336], [60.03033008588991, 48.96966991411009], [59.5, 48.75], [59.25, 48.85355339059328], [59.0, 48.75], [58.75, 48.85355339059328], [58.5, 48.75], [58.25, 48.85355339059328], [58.0, 48.75], [57.75, 48.85355339059328], [57.67677669529664, 48.82322330470336], [57.53033008588991, 48.46966991411009], [57.0, 48.25], [56.75, 48.35355339059328], [56.67677669529664, 48.32322330470336], [56.53033008588991, 47.96966991411009], [56.0, 47.75], [55.75, 47.85355339059328], [55.5, 47.75], [55.25, 47.85355339059328], [55.17677669529664, 47.82322330470336], [55.03033008588991, 47.46966991411009], [54.5, 47.25], [54.25, 47.35355339059328], [54.0, 47.25], [53.46966991411009, 47.46966991411009], [53.25, 48.0], [53.46966991411009, 48.53033008588991], [53.82322330470336, 48.67677669529664]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.287997576963278}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.371096483925514}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.614284597054393, 17.129136829736353, 17.12492907251641, 17.870911254660427]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.55517078640827, 12.862881998893442, 15.49326986082616, 16.475793753030757]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.8636937513276735, -6.769400643132885, -6.7556947697196685, -5.976839111915821]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.185903275261865, -9.287997576963278, -8.564785037477861, -6.686726549473917]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.335598365824703, -1.8646347920300916, -1.8227998964349055, -1.5479004966971186]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4480930620255787, -2.51674784706148, -2.304061222021189, -1.7284370794576038]}}