{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:17:57.591876", "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-Aug-30_to_2020-Sep-02_54.5_36.0"}, "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": 2020080001040}, "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": "August 30 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2020"}, "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": 148701.8971075121}, "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": ["Iran, Islamic Republic of"]}, "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": 36.0}, "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": 54.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "54.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 50.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 58.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[52.646, 33.25], [52.75, 33.0], [52.53, 32.47], [52.0, 32.25], [51.47, 32.47], [51.302, 32.875], [51.0, 32.75], [50.75, 32.854], [50.5, 32.75], [49.97, 32.97], [49.75, 33.5], [49.97, 34.03], [50.375, 34.198], [50.25, 34.5], [50.354, 34.75], [50.25, 35.0], [50.47, 35.53], [50.823, 35.677], [50.97, 36.03], [51.5, 36.25], [51.75, 36.146], [52.0, 36.25], [52.25, 36.146], [52.5, 36.25], [52.75, 36.146], [52.823, 36.177], [52.97, 36.53], [53.323, 36.677], [53.47, 37.03], [54.0, 37.25], [54.25, 37.146], [54.5, 37.25], [54.75, 37.146], [55.0, 37.25], [55.25, 37.146], [55.323, 37.177], [55.47, 37.53], [56.0, 37.75], [56.25, 37.646], [56.5, 37.75], [56.75, 37.646], [57.0, 37.75], [57.25, 37.646], [57.5, 37.75], [58.03, 37.53], [58.25, 37.0], [58.146, 36.75], [58.198, 36.625], [58.5, 36.75], [59.03, 36.53], [59.25, 36.0], [59.03, 35.47], [58.677, 35.323], [58.53, 34.97], [58.0, 34.75], [57.75, 34.854], [57.677, 34.823], [57.53, 34.47], [57.0, 34.25], [56.47, 34.47], [56.323, 34.823], [55.97, 34.97], [55.823, 35.323], [55.75, 35.354], [55.677, 35.323], [55.53, 34.97], [55.177, 34.823], [55.146, 34.75], [55.25, 34.5], [55.146, 34.25], [55.25, 34.0], [55.03, 33.47], [54.5, 33.25], [54.25, 33.354], [54.0, 33.25], [53.47, 33.47], [53.323, 33.823], [53.25, 33.854], [53.0, 33.75], [52.75, 33.854], [52.677, 33.823], [52.646, 33.75], [52.646, 33.749], [52.75, 33.5], [52.646, 33.25]]]}}, "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": {"2020-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.53033008588991, 32.96966991411009], [52.0, 32.75], [51.46966991411009, 32.96966991411009], [51.25, 33.5], [51.46966991411009, 34.03033008588991], [52.0, 34.25], [52.53033008588991, 34.03033008588991], [52.75, 33.5], [52.53033008588991, 32.96966991411009]]], [[[51.0, 34.25], [50.46966991411009, 34.46966991411009], [50.25, 35.0], [50.46966991411009, 35.53033008588991], [51.0, 35.75], [51.53033008588991, 35.53033008588991], [51.75, 35.0], [51.53033008588991, 34.46966991411009], [51.0, 34.25]]], [[[52.75, 36.0], [52.96966991411009, 36.53033008588991], [53.32322330470336, 36.67677669529664], [53.46966991411009, 37.03033008588991], [54.0, 37.25], [54.25, 37.14644660940672], [54.5, 37.25], [54.75, 37.14644660940672], [55.0, 37.25], [55.25, 37.14644660940672], [55.32322330470336, 37.17677669529664], [55.46966991411009, 37.53033008588991], [56.0, 37.75], [56.25, 37.64644660940672], [56.5, 37.75], [56.75, 37.64644660940672], [57.0, 37.75], [57.25, 37.64644660940672], [57.5, 37.75], [58.03033008588991, 37.53033008588991], [58.25, 37.0], [58.14644660940672, 36.75], [58.19822330470336, 36.625], [58.5, 36.75], [59.03033008588991, 36.53033008588991], [59.25, 36.0], [59.03033008588991, 35.46966991411009], [58.67677669529664, 35.32322330470336], [58.53033008588991, 34.96966991411009], [58.0, 34.75], [57.75, 34.85355339059328], [57.67677669529664, 34.82322330470336], [57.53033008588991, 34.46966991411009], [57.0, 34.25], [56.46966991411009, 34.46966991411009], [56.32322330470336, 34.82322330470336], [55.96966991411009, 34.96966991411009], [55.82322330470336, 35.32322330470336], [55.75, 35.35355339059328], [55.5, 35.25], [55.25, 35.35355339059328], [55.17677669529664, 35.32322330470336], [55.03033008588991, 34.96966991411009], [54.5, 34.75], [54.25, 34.85355339059328], [54.0, 34.75], [53.46966991411009, 34.96966991411009], [53.32322330470336, 35.32322330470336], [52.96966991411009, 35.46966991411009], [52.75, 36.0]]]]}, "2020-08-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[50.35355339059328, 34.75], [50.25, 35.0], [50.46966991411009, 35.53033008588991], [50.82322330470336, 35.67677669529664], [50.96966991411009, 36.03033008588991], [51.5, 36.25], [51.75, 36.14644660940672], [52.0, 36.25], [52.25, 36.14644660940672], [52.5, 36.25], [52.75, 36.14644660940672], [52.82322330470336, 36.17677669529664], [52.96966991411009, 36.53033008588991], [53.32322330470336, 36.67677669529664], [53.46966991411009, 37.03033008588991], [54.0, 37.25], [54.25, 37.14644660940672], [54.5, 37.25], [54.75, 37.14644660940672], [55.0, 37.25], [55.25, 37.14644660940672], [55.32322330470336, 37.17677669529664], [55.46966991411009, 37.53033008588991], [56.0, 37.75], [56.25, 37.64644660940672], [56.5, 37.75], [56.75, 37.64644660940672], [57.0, 37.75], [57.25, 37.64644660940672], [57.5, 37.75], [58.03033008588991, 37.53033008588991], [58.25, 37.0], [58.14644660940672, 36.75], [58.19822330470336, 36.625], [58.5, 36.75], [59.03033008588991, 36.53033008588991], [59.25, 36.0], [59.03033008588991, 35.46966991411009], [58.67677669529664, 35.32322330470336], [58.53033008588991, 34.96966991411009], [58.0, 34.75], [57.75, 34.85355339059328], [57.67677669529664, 34.82322330470336], [57.53033008588991, 34.46966991411009], [57.0, 34.25], [56.46966991411009, 34.46966991411009], [56.32322330470336, 34.82322330470336], [55.96966991411009, 34.96966991411009], [55.82322330470336, 35.32322330470336], [55.75, 35.35355339059328], [55.67677669529664, 35.32322330470336], [55.53033008588991, 34.96966991411009], [55.17677669529664, 34.82322330470336], [55.14644660940672, 34.75], [55.25, 34.5], [55.14644660940672, 34.25], [55.25, 34.0], [55.03033008588991, 33.46966991411009], [54.5, 33.25], [54.25, 33.35355339059328], [54.0, 33.25], [53.46966991411009, 33.46966991411009], [53.32322330470336, 33.82322330470336], [53.25, 33.85355339059328], [53.0, 33.75], [52.75, 33.85355339059328], [52.67677669529664, 33.82322330470336], [52.64644660940672, 33.75], [52.75, 33.5], [52.64644660940672, 33.25], [52.75, 33.0], [52.53033008588991, 32.46966991411009], [52.0, 32.25], [51.46966991411009, 32.46966991411009], [51.30177669529664, 32.875], [51.0, 32.75], [50.75, 32.85355339059328], [50.5, 32.75], [49.96966991411009, 32.96966991411009], [49.75, 33.5], [49.96966991411009, 34.03033008588991], [50.375, 34.19822330470336], [50.25, 34.5], [50.35355339059328, 34.75]]]}, "2020-09-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[50.35355339059328, 34.75], [50.25, 35.0], [50.46966991411009, 35.53033008588991], [50.82322330470336, 35.67677669529664], [50.96966991411009, 36.03033008588991], [51.5, 36.25], [51.75, 36.14644660940672], [52.0, 36.25], [52.25, 36.14644660940672], [52.5, 36.25], [52.75, 36.14644660940672], [52.82322330470336, 36.17677669529664], [52.96966991411009, 36.53033008588991], [53.32322330470336, 36.67677669529664], [53.46966991411009, 37.03033008588991], [54.0, 37.25], [54.25, 37.14644660940672], [54.5, 37.25], [54.75, 37.14644660940672], [55.0, 37.25], [55.25, 37.14644660940672], [55.32322330470336, 37.17677669529664], [55.46966991411009, 37.53033008588991], [56.0, 37.75], [56.25, 37.64644660940672], [56.5, 37.75], [56.75, 37.64644660940672], [57.0, 37.75], [57.25, 37.64644660940672], [57.5, 37.75], [58.03033008588991, 37.53033008588991], [58.25, 37.0], [58.14644660940672, 36.75], [58.19822330470336, 36.625], [58.5, 36.75], [59.03033008588991, 36.53033008588991], [59.25, 36.0], [59.03033008588991, 35.46966991411009], [58.67677669529664, 35.32322330470336], [58.53033008588991, 34.96966991411009], [58.0, 34.75], [57.75, 34.85355339059328], [57.67677669529664, 34.82322330470336], [57.53033008588991, 34.46966991411009], [57.0, 34.25], [56.46966991411009, 34.46966991411009], [56.32322330470336, 34.82322330470336], [55.96966991411009, 34.96966991411009], [55.82322330470336, 35.32322330470336], [55.75, 35.35355339059328], [55.67677669529664, 35.32322330470336], [55.53033008588991, 34.96966991411009], [55.17677669529664, 34.82322330470336], [55.14644660940672, 34.75], [55.25, 34.5], [55.14644660940672, 34.25], [55.25, 34.0], [55.03033008588991, 33.46966991411009], [54.5, 33.25], [54.25, 33.35355339059328], [54.0, 33.25], [53.46966991411009, 33.46966991411009], [53.32322330470336, 33.82322330470336], [53.25, 33.85355339059328], [53.0, 33.75], [52.75, 33.85355339059328], [52.67677669529664, 33.82322330470336], [52.64644660940672, 33.75], [52.75, 33.5], [52.64644660940672, 33.25], [52.75, 33.0], [52.53033008588991, 32.46966991411009], [52.0, 32.25], [51.46966991411009, 32.46966991411009], [51.30177669529664, 32.875], [51.0, 32.75], [50.75, 32.85355339059328], [50.5, 32.75], [49.96966991411009, 32.96966991411009], [49.75, 33.5], [49.96966991411009, 34.03033008588991], [50.375, 34.19822330470336], [50.25, 34.5], [50.35355339059328, 34.75]]]}, "2020-09-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[50.35355339059328, 34.75], [50.25, 35.0], [50.46966991411009, 35.53033008588991], [50.82322330470336, 35.67677669529664], [50.96966991411009, 36.03033008588991], [51.5, 36.25], [51.75, 36.14644660940672], [52.0, 36.25], [52.25, 36.14644660940672], [52.5, 36.25], [52.75, 36.14644660940672], [53.0, 36.25], [53.25, 36.14644660940672], [53.5, 36.25], [53.75, 36.14644660940672], [53.82322330470336, 36.17677669529664], [53.96966991411009, 36.53033008588991], [54.5, 36.75], [54.75, 36.64644660940672], [55.0, 36.75], [55.53033008588991, 36.53033008588991], [55.75, 36.0], [55.64644660940672, 35.75], [55.75, 35.5], [55.53033008588991, 34.96966991411009], [55.17677669529664, 34.82322330470336], [55.14644660940672, 34.75], [55.25, 34.5], [55.14644660940672, 34.25], [55.25, 34.0], [55.03033008588991, 33.46966991411009], [54.5, 33.25], [54.25, 33.35355339059328], [54.0, 33.25], [53.46966991411009, 33.46966991411009], [53.32322330470336, 33.82322330470336], [53.25, 33.85355339059328], [53.0, 33.75], [52.75, 33.85355339059328], [52.67677669529664, 33.82322330470336], [52.54289321881345, 33.5], [52.75, 33.0], [52.53033008588991, 32.46966991411009], [52.0, 32.25], [51.46966991411009, 32.46966991411009], [51.30177669529664, 32.875], [51.0, 32.75], [50.75, 32.85355339059328], [50.5, 32.75], [49.96966991411009, 32.96966991411009], [49.75, 33.5], [49.96966991411009, 34.03033008588991], [50.375, 34.19822330470336], [50.25, 34.5], [50.35355339059328, 34.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.880685118326255}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8833681113969396}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.95428005730389, 22.87803376198923, 22.905622099232176, 25.272777081244044]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.06242437030437, 13.77457275202795, 14.316473066665992, 19.129737228924057]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7353048597860448, -4.258323765993878, -4.04509808956757, -3.062928974022725]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.545691655958876, -5.880685118326255, -5.0614166268409235, -3.614764308901215]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.594017803890068, -1.9187841723795467, -1.8984119979559855, -1.552961380616331]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9523723790550025, -2.4589020375359896, -2.537492912147458, -1.8410837159667093]}}