{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:16.732659", "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": "2025-Jul-05_to_2025-Jul-09_51.0_23.5"}, "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": 2025070000324}, "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 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 79933.2444041067}, "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": ["Saudi Arabia"]}, "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": 23.5}, "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": 51.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "51.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 53.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[50.93, 21.43], [50.5, 21.25], [49.97, 21.47], [49.82, 21.82], [49.75, 21.85], [49.5, 21.75], [48.97, 21.97], [48.82, 22.32], [48.47, 22.47], [48.32, 22.82], [47.97, 22.97], [47.75, 23.5], [47.97, 24.03], [48.5, 24.25], [48.75, 24.15], [49.0, 24.25], [49.25, 24.15], [49.5, 24.25], [49.8, 24.13], [49.97, 24.53], [50.5, 24.75], [51.03, 24.53], [51.18, 24.18], [51.53, 24.03], [51.68, 23.68], [52.03, 23.53], [52.18, 23.18], [52.25, 23.15], [52.5, 23.25], [53.03, 23.03], [53.18, 22.68], [53.53, 22.53], [53.75, 22.0], [53.65, 21.75], [53.75, 21.5], [53.53, 20.97], [53.18, 20.82], [53.03, 20.47], [52.5, 20.25], [52.25, 20.35], [52.0, 20.25], [51.75, 20.35], [51.5, 20.25], [50.97, 20.47], [50.75, 21.0], [50.93, 21.43]], [[51.25, 21.85], [51.18, 21.82], [51.07, 21.57], [51.37, 21.7], [51.32, 21.82], [51.25, 21.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.97, 23.47], [49.75, 24.0], [49.97, 24.53], [50.5, 24.75], [51.03, 24.53], [51.18, 24.18], [51.53, 24.03], [51.75, 23.5], [51.53, 22.97], [51.0, 22.75], [50.47, 22.97], [50.32, 23.32], [49.97, 23.47]]]]}, "2025-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.97, 22.97], [47.75, 23.5], [47.97, 24.03], [48.5, 24.25], [48.75, 24.15], [49.0, 24.25], [49.25, 24.15], [49.5, 24.25], [49.8, 24.13], [49.97, 24.53], [50.5, 24.75], [51.03, 24.53], [51.18, 24.18], [51.53, 24.03], [51.68, 23.68], [52.03, 23.53], [52.18, 23.18], [52.25, 23.15], [52.5, 23.25], [53.03, 23.03], [53.18, 22.68], [53.53, 22.53], [53.75, 22.0], [53.65, 21.75], [53.75, 21.5], [53.53, 20.97], [53.0, 20.75], [52.75, 20.85], [52.5, 20.75], [51.97, 20.97], [51.82, 21.32], [51.47, 21.47], [51.32, 21.82], [51.25, 21.85], [51.18, 21.82], [51.03, 21.47], [50.5, 21.25], [49.97, 21.47], [49.82, 21.82], [49.75, 21.85], [49.5, 21.75], [48.97, 21.97], [48.82, 22.32], [48.47, 22.47], [48.32, 22.82], [47.97, 22.97]]]]}, "2025-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.97, 22.97], [47.75, 23.5], [47.97, 24.03], [48.5, 24.25], [48.75, 24.15], [49.0, 24.25], [49.25, 24.15], [49.5, 24.25], [49.8, 24.13], [49.97, 24.53], [50.5, 24.75], [51.03, 24.53], [51.18, 24.18], [51.53, 24.03], [51.68, 23.68], [52.03, 23.53], [52.18, 23.18], [52.25, 23.15], [52.5, 23.25], [53.03, 23.03], [53.18, 22.68], [53.53, 22.53], [53.75, 22.0], [53.65, 21.75], [53.75, 21.5], [53.53, 20.97], [53.18, 20.82], [53.03, 20.47], [52.5, 20.25], [52.25, 20.35], [52.0, 20.25], [51.75, 20.35], [51.5, 20.25], [50.97, 20.47], [50.75, 21.0], [50.93, 21.43], [50.5, 21.25], [49.97, 21.47], [49.82, 21.82], [49.75, 21.85], [49.5, 21.75], [48.97, 21.97], [48.82, 22.32], [48.47, 22.47], [48.32, 22.82], [47.97, 22.97]], [[51.07, 21.57], [51.38, 21.7], [51.32, 21.82], [51.25, 21.85], [51.18, 21.82], [51.07, 21.57]]]]}, "2025-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.97, 22.97], [47.75, 23.5], [47.97, 24.03], [48.5, 24.25], [48.75, 24.15], [49.0, 24.25], [49.25, 24.15], [49.5, 24.25], [49.8, 24.13], [49.97, 24.53], [50.5, 24.75], [51.03, 24.53], [51.18, 24.18], [51.53, 24.03], [51.68, 23.68], [52.03, 23.53], [52.18, 23.18], [52.25, 23.15], [52.5, 23.25], [53.03, 23.03], [53.18, 22.68], [53.53, 22.53], [53.75, 22.0], [53.65, 21.75], [53.75, 21.5], [53.53, 20.97], [53.18, 20.82], [53.03, 20.47], [52.5, 20.25], [52.25, 20.35], [52.0, 20.25], [51.75, 20.35], [51.5, 20.25], [50.97, 20.47], [50.75, 21.0], [50.93, 21.43], [50.5, 21.25], [49.97, 21.47], [49.82, 21.82], [49.75, 21.85], [49.5, 21.75], [48.97, 21.97], [48.82, 22.32], [48.47, 22.47], [48.32, 22.82], [47.97, 22.97]], [[51.07, 21.57], [51.38, 21.7], [51.32, 21.82], [51.25, 21.85], [51.18, 21.82], [51.07, 21.57]]]]}, "2025-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.5, 20.25], [50.97, 20.47], [50.75, 21.0], [50.97, 21.53], [51.5, 21.75], [51.75, 21.65], [52.0, 21.75], [52.25, 21.65], [52.5, 21.75], [53.03, 21.53], [53.25, 21.0], [53.03, 20.47], [52.5, 20.25], [52.25, 20.35], [52.0, 20.25], [51.75, 20.35], [51.5, 20.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.249288531175921}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2971314367223425}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [34.946482594808, 34.85634353637698, 34.42128670102073, 35.231344204857294, 35.84251471625436]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [34.66698226928713, 34.020825958251976, 33.87350489298507, 34.78527603149416, 35.75972391764327]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.717942782487114, -2.2115100035821955, -2.748109272331277, -2.030814096192001, -1.6732711949801835]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7910339891710123, -2.7638095855127176, -3.249288531175921, -2.4972746780507578, -1.7563706331254707]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.318131151550495, -1.7038908495293068, -2.105897987919173, -1.5789685473301984, -1.3798109092928972]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3679556396467702, -2.140013790861034, -2.5186164228340484, -2.0892711179117898, -1.4506133866014566]}}