{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:28.908422", "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": "2026-Apr-20_to_2026-Apr-25_48.0_30.0"}, "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": 2026040000610}, "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 20 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 55831.039752384255}, "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", "Iraq", "Kuwait"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula", "W.C.Asia"]}, "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": ["Persian Gulf"]}, "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": 30.0}, "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": 48.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.0, 31.25], [47.25, 31.15], [47.5, 31.25], [47.75, 31.15], [48.0, 31.25], [48.25, 31.15], [48.5, 31.25], [48.75, 31.15], [49.0, 31.25], [49.25, 31.15], [49.5, 31.25], [50.03, 31.03], [50.25, 30.5], [50.03, 29.97], [49.5, 29.75], [49.25, 29.85], [49.18, 29.82], [49.03, 29.47], [48.68, 29.32], [48.53, 28.97], [48.0, 28.75], [47.47, 28.97], [47.32, 29.32], [47.25, 29.35], [47.0, 29.25], [46.75, 29.35], [46.5, 29.25], [45.97, 29.47], [45.75, 30.0], [45.97, 30.53], [46.32, 30.68], [46.47, 31.03], [47.0, 31.25]]]]}, "2026-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, 31.03], [46.38, 31.2], [46.25, 31.5], [46.47, 32.03], [47.0, 32.25], [47.25, 32.15], [47.32, 32.18], [47.47, 32.53], [48.0, 32.75], [48.53, 32.53], [48.68, 32.18], [49.03, 32.03], [49.25, 31.5], [49.15, 31.25], [49.18, 31.18], [49.25, 31.15], [49.5, 31.25], [50.03, 31.03], [50.25, 30.5], [50.03, 29.97], [49.5, 29.75], [49.25, 29.85], [49.18, 29.82], [49.03, 29.47], [48.68, 29.32], [48.53, 28.97], [48.0, 28.75], [47.47, 28.97], [47.32, 29.32], [47.25, 29.35], [47.0, 29.25], [46.75, 29.35], [46.5, 29.25], [45.97, 29.47], [45.75, 30.0], [45.85, 30.25], [45.75, 30.5], [45.97, 31.03]]]]}, "2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, 31.03], [46.38, 31.2], [46.25, 31.5], [46.47, 32.03], [47.0, 32.25], [47.25, 32.15], [47.32, 32.18], [47.47, 32.53], [48.0, 32.75], [48.53, 32.53], [48.68, 32.18], [49.03, 32.03], [49.25, 31.5], [49.15, 31.25], [49.18, 31.18], [49.25, 31.15], [49.5, 31.25], [50.03, 31.03], [50.25, 30.5], [50.03, 29.97], [49.5, 29.75], [49.25, 29.85], [49.18, 29.82], [49.03, 29.47], [48.68, 29.32], [48.53, 28.97], [48.0, 28.75], [47.47, 28.97], [47.32, 29.32], [47.25, 29.35], [47.0, 29.25], [46.75, 29.35], [46.5, 29.25], [45.97, 29.47], [45.75, 30.0], [45.85, 30.25], [45.75, 30.5], [45.97, 31.03]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, 31.03], [46.38, 31.2], [46.25, 31.5], [46.47, 32.03], [47.0, 32.25], [47.25, 32.15], [47.32, 32.18], [47.47, 32.53], [48.0, 32.75], [48.53, 32.53], [48.68, 32.18], [49.03, 32.03], [49.25, 31.5], [49.15, 31.25], [49.18, 31.18], [49.25, 31.15], [49.5, 31.25], [50.03, 31.03], [50.25, 30.5], [50.03, 29.97], [49.5, 29.75], [49.25, 29.85], [49.18, 29.82], [49.03, 29.47], [48.5, 29.25], [48.25, 29.35], [48.0, 29.25], [47.75, 29.35], [47.5, 29.25], [47.0, 29.46], [46.5, 29.25], [45.97, 29.47], [45.75, 30.0], [45.85, 30.25], [45.75, 30.5], [45.97, 31.03]]]]}, "2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.47, 29.97], [46.25, 30.5], [46.47, 31.03], [47.0, 31.25], [47.5, 31.04], [48.0, 31.25], [48.5, 31.04], [49.0, 31.25], [49.25, 31.15], [49.5, 31.25], [50.03, 31.03], [50.25, 30.5], [50.03, 29.97], [49.5, 29.75], [49.25, 29.85], [49.18, 29.82], [49.03, 29.47], [48.5, 29.25], [48.25, 29.35], [48.0, 29.25], [47.47, 29.47], [47.3, 29.88], [47.0, 29.75], [46.47, 29.97]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.0, 31.25], [49.53, 31.03], [49.75, 30.5], [49.53, 29.97], [49.0, 29.75], [48.7, 29.88], [48.53, 29.47], [48.0, 29.25], [47.47, 29.47], [47.25, 30.0], [47.47, 30.53], [48.0, 30.75], [48.3, 30.63], [48.47, 31.03], [49.0, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.970100211503393}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.34546331298751}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.155134667290554, 22.471406979031087, 23.03193090529669, 23.353572229753468, 24.176555887858115, 24.963264719645167]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.523508961995446, 20.043645477294945, 20.743984476725302, 21.727801259358728, 23.21569976806643, 24.922045644124353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.80184728091119, -4.783092087849124, -4.442698350907403, -4.414973888630814, -3.6524709350472335, -3.409716136449049]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.5102410068409995, -5.970100211503393, -5.463908560361517, -5.226808412837386, -4.190934981598673, -3.4600347614788234]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5758638931855387, -1.8395561658258006, -1.6205885964788187, -1.5676030691300988, -1.488890684924401, -1.3637571449135257]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8449019630949004, -2.382829330736061, -1.9252053853424178, -1.9977289543935606, -1.567514295628641, -1.39555731919226]}}