{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:02.108326", "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": "2023-May-03_to_2023-May-06_56.5_24.5"}, "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": 2023050000194}, "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": "May 03 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 06 2023"}, "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": 50525.07049142147}, "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", "Oman"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 24.5}, "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": 56.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "56.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 56.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 59.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[55.97, 26.03], [56.5, 26.25], [57.03, 26.03], [57.18, 25.68], [57.25, 25.65], [57.38, 25.7], [57.25, 26.0], [57.47, 26.53], [58.0, 26.75], [58.25, 26.65], [58.5, 26.75], [59.03, 26.53], [59.25, 26.0], [59.15, 25.75], [59.25, 25.5], [59.13, 25.2], [59.53, 25.03], [59.75, 24.5], [59.54, 24.0], [59.75, 23.5], [59.53, 22.97], [59.0, 22.75], [58.47, 22.97], [58.32, 23.32], [58.25, 23.35], [58.0, 23.25], [57.75, 23.35], [57.5, 23.25], [56.97, 23.47], [56.82, 23.82], [56.75, 23.85], [56.5, 23.75], [55.97, 23.97], [55.75, 24.5], [55.85, 24.75], [55.75, 25.0], [55.85, 25.25], [55.75, 25.5], [55.97, 26.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[57.47, 25.47], [57.25, 26.0], [57.47, 26.53], [58.0, 26.75], [58.25, 26.65], [58.5, 26.75], [59.03, 26.53], [59.25, 26.0], [59.15, 25.75], [59.25, 25.5], [59.03, 24.97], [58.5, 24.75], [57.97, 24.97], [57.82, 25.32], [57.47, 25.47]]]]}, "2023-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.75, 25.0], [55.85, 25.25], [55.75, 25.5], [55.97, 26.03], [56.5, 26.25], [57.03, 26.03], [57.18, 25.68], [57.25, 25.65], [57.38, 25.7], [57.25, 26.0], [57.47, 26.53], [58.0, 26.75], [58.25, 26.65], [58.5, 26.75], [59.03, 26.53], [59.25, 26.0], [59.15, 25.75], [59.25, 25.5], [59.13, 25.2], [59.53, 25.03], [59.75, 24.5], [59.54, 24.0], [59.75, 23.5], [59.53, 22.97], [59.0, 22.75], [58.47, 22.97], [58.32, 23.32], [58.25, 23.35], [58.0, 23.25], [57.75, 23.35], [57.5, 23.25], [56.97, 23.47], [56.82, 23.82], [56.75, 23.85], [56.5, 23.75], [55.97, 23.97], [55.75, 24.5], [55.85, 24.75], [55.75, 25.0]]]]}, "2023-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.75, 25.0], [55.85, 25.25], [55.75, 25.5], [55.97, 26.03], [56.5, 26.25], [57.03, 26.03], [57.18, 25.68], [57.25, 25.65], [57.38, 25.7], [57.25, 26.0], [57.47, 26.53], [58.0, 26.75], [58.25, 26.65], [58.5, 26.75], [59.03, 26.53], [59.25, 26.0], [59.15, 25.75], [59.25, 25.5], [59.13, 25.2], [59.53, 25.03], [59.75, 24.5], [59.54, 24.0], [59.75, 23.5], [59.53, 22.97], [59.0, 22.75], [58.47, 22.97], [58.32, 23.32], [58.25, 23.35], [58.0, 23.25], [57.75, 23.35], [57.5, 23.25], [56.97, 23.47], [56.82, 23.82], [56.75, 23.85], [56.5, 23.75], [55.97, 23.97], [55.75, 24.5], [55.85, 24.75], [55.75, 25.0]]]]}, "2023-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.75, 25.0], [55.85, 25.25], [55.75, 25.5], [55.97, 26.03], [56.5, 26.25], [57.03, 26.03], [57.18, 25.68], [57.25, 25.65], [57.5, 25.75], [57.75, 25.65], [58.0, 25.75], [58.53, 25.53], [58.68, 25.18], [58.75, 25.15], [59.0, 25.25], [59.53, 25.03], [59.75, 24.5], [59.54, 24.0], [59.75, 23.5], [59.53, 22.97], [59.0, 22.75], [58.47, 22.97], [58.32, 23.32], [58.25, 23.35], [58.0, 23.25], [57.75, 23.35], [57.5, 23.25], [56.97, 23.47], [56.82, 23.82], [56.75, 23.85], [56.5, 23.75], [55.97, 23.97], [55.75, 24.5], [55.85, 24.75], [55.75, 25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.042682339633018}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1478384597310956}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.73297304648395, 27.73796422591323, 27.759002435946172, 27.87593810517319]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.63234847098778, 26.5184310743345, 26.40060834135045, 26.80435808120143]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.487313457218723, -2.1951748527512414, -2.2420993935593634, -1.9100266680154732]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0066508132437093, -4.042682339633018, -3.929374407786952, -3.0333367550686035]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3362244563336265, -1.5673083329589963, -1.6012588126210563, -1.4601273580371987]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4093537933215652, -1.8492928491127236, -1.9556629041989984, -1.6808186440017068]}}