{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:12:45.677285", "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-Apr-23_to_2020-Apr-25_47.0_39.5"}, "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": 2020040000650}, "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": "April 23 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 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": 105475.14854512147}, "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": ["Armenia", "Azerbaijan", "Georgia", "Iran, Islamic Republic of", "Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "Asia", "Asia", "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": 39.5}, "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": 47.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[43.47, 42.03], [43.875, 42.198], [43.75, 42.5], [43.97, 43.03], [44.5, 43.25], [44.75, 43.146], [45.0, 43.25], [45.25, 43.146], [45.5, 43.25], [46.03, 43.03], [46.177, 42.677], [46.25, 42.646], [46.5, 42.75], [47.03, 42.53], [47.177, 42.177], [47.53, 42.03], [47.677, 41.677], [48.03, 41.53], [48.177, 41.177], [48.25, 41.146], [48.5, 41.25], [49.03, 41.03], [49.177, 40.677], [49.53, 40.53], [49.75, 40.0], [49.646, 39.75], [49.75, 39.5], [49.53, 38.97], [49.0, 38.75], [48.75, 38.854], [48.677, 38.823], [48.53, 38.47], [48.0, 38.25], [47.75, 38.354], [47.5, 38.25], [47.25, 38.354], [47.0, 38.25], [46.75, 38.354], [46.5, 38.25], [45.97, 38.47], [45.75, 39.0], [45.957, 39.5], [45.823, 39.823], [45.75, 39.854], [45.5, 39.75], [45.25, 39.854], [45.0, 39.75], [44.75, 39.854], [44.5, 39.75], [43.97, 39.97], [43.823, 40.323], [43.47, 40.47], [43.25, 41.0], [43.354, 41.25], [43.25, 41.5], [43.47, 42.03]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[43.35355339059328, 41.25], [43.25, 41.5], [43.46966991411009, 42.03033008588991], [43.875, 42.19822330470336], [43.75, 42.5], [43.96966991411009, 43.03033008588991], [44.5, 43.25], [44.75, 43.14644660940672], [45.0, 43.25], [45.25, 43.14644660940672], [45.5, 43.25], [46.03033008588991, 43.03033008588991], [46.17677669529664, 42.67677669529664], [46.25, 42.64644660940672], [46.5, 42.75], [47.03033008588991, 42.53033008588991], [47.17677669529664, 42.17677669529664], [47.53033008588991, 42.03033008588991], [47.67677669529664, 41.67677669529664], [48.03033008588991, 41.53033008588991], [48.17677669529664, 41.17677669529664], [48.25, 41.14644660940672], [48.5, 41.25], [49.03033008588991, 41.03033008588991], [49.17677669529664, 40.67677669529664], [49.53033008588991, 40.53033008588991], [49.75, 40.0], [49.64644660940672, 39.75], [49.75, 39.5], [49.53033008588991, 38.96966991411009], [49.0, 38.75], [48.75, 38.85355339059328], [48.67677669529664, 38.82322330470336], [48.53033008588991, 38.46966991411009], [48.0, 38.25], [47.75, 38.35355339059328], [47.5, 38.25], [47.25, 38.35355339059328], [47.0, 38.25], [46.75, 38.35355339059328], [46.5, 38.25], [45.96966991411009, 38.46966991411009], [45.75, 39.0], [45.95710678118655, 39.5], [45.82322330470336, 39.82322330470336], [45.75, 39.85355339059328], [45.5, 39.75], [45.25, 39.85355339059328], [45.0, 39.75], [44.75, 39.85355339059328], [44.5, 39.75], [43.96966991411009, 39.96966991411009], [43.82322330470336, 40.32322330470336], [43.46966991411009, 40.46966991411009], [43.25, 41.0], [43.35355339059328, 41.25]]]}, "2020-04-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[43.35355339059328, 41.25], [43.25, 41.5], [43.46966991411009, 42.03033008588991], [43.875, 42.19822330470336], [43.75, 42.5], [43.96966991411009, 43.03033008588991], [44.5, 43.25], [44.75, 43.14644660940672], [45.0, 43.25], [45.25, 43.14644660940672], [45.5, 43.25], [46.03033008588991, 43.03033008588991], [46.17677669529664, 42.67677669529664], [46.25, 42.64644660940672], [46.5, 42.75], [47.03033008588991, 42.53033008588991], [47.17677669529664, 42.17677669529664], [47.53033008588991, 42.03033008588991], [47.67677669529664, 41.67677669529664], [48.03033008588991, 41.53033008588991], [48.17677669529664, 41.17677669529664], [48.25, 41.14644660940672], [48.5, 41.25], [49.03033008588991, 41.03033008588991], [49.17677669529664, 40.67677669529664], [49.53033008588991, 40.53033008588991], [49.75, 40.0], [49.64644660940672, 39.75], [49.75, 39.5], [49.53033008588991, 38.96966991411009], [49.0, 38.75], [48.75, 38.85355339059328], [48.67677669529664, 38.82322330470336], [48.53033008588991, 38.46966991411009], [48.0, 38.25], [47.75, 38.35355339059328], [47.5, 38.25], [47.25, 38.35355339059328], [47.0, 38.25], [46.75, 38.35355339059328], [46.5, 38.25], [45.96966991411009, 38.46966991411009], [45.75, 39.0], [45.95710678118655, 39.5], [45.82322330470336, 39.82322330470336], [45.75, 39.85355339059328], [45.5, 39.75], [45.25, 39.85355339059328], [45.0, 39.75], [44.75, 39.85355339059328], [44.5, 39.75], [43.96966991411009, 39.96966991411009], [43.82322330470336, 40.32322330470336], [43.46966991411009, 40.46966991411009], [43.25, 41.0], [43.35355339059328, 41.25]]]}, "2020-04-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[43.35355339059328, 41.25], [43.25, 41.5], [43.46966991411009, 42.03033008588991], [43.875, 42.19822330470336], [43.75, 42.5], [43.96966991411009, 43.03033008588991], [44.5, 43.25], [44.75, 43.14644660940672], [45.0, 43.25], [45.25, 43.14644660940672], [45.5, 43.25], [46.03033008588991, 43.03033008588991], [46.17677669529664, 42.67677669529664], [46.25, 42.64644660940672], [46.5, 42.75], [47.03033008588991, 42.53033008588991], [47.17677669529664, 42.17677669529664], [47.53033008588991, 42.03033008588991], [47.67677669529664, 41.67677669529664], [48.03033008588991, 41.53033008588991], [48.17677669529664, 41.17677669529664], [48.25, 41.14644660940672], [48.5, 41.25], [49.03033008588991, 41.03033008588991], [49.17677669529664, 40.67677669529664], [49.53033008588991, 40.53033008588991], [49.75, 40.0], [49.64644660940672, 39.75], [49.75, 39.5], [49.53033008588991, 38.96966991411009], [49.0, 38.75], [48.75, 38.85355339059328], [48.67677669529664, 38.82322330470336], [48.53033008588991, 38.46966991411009], [48.0, 38.25], [47.75, 38.35355339059328], [47.5, 38.25], [47.25, 38.35355339059328], [47.0, 38.25], [46.75, 38.35355339059328], [46.5, 38.25], [45.96966991411009, 38.46966991411009], [45.75, 39.0], [45.95710678118655, 39.5], [45.82322330470336, 39.82322330470336], [45.75, 39.85355339059328], [45.5, 39.75], [45.25, 39.85355339059328], [45.0, 39.75], [44.75, 39.85355339059328], [44.5, 39.75], [43.96966991411009, 39.96966991411009], [43.82322330470336, 40.32322330470336], [43.46966991411009, 40.46966991411009], [43.25, 41.0], [43.35355339059328, 41.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.58557096569126}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.286154540511604}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.39333886668436, 3.2641966519205994, 4.676664640164461]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.833663172439458, -6.00301134864884, -4.363613058157796]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.871770327575725, -7.107113702003182, -5.879579591955896]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.683252889831579, -9.58557096569126, -7.360233370168942]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5511675962668563, -1.8650624656571557, -1.5749269931149392]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8287343702575216, -2.1951718810536525, -1.87357092443374]}}