{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:52.323983", "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-Jan-03_to_2025-Jan-06_62.5_27.5"}, "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": 2025010000150}, "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": "January 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2025"}, "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": 60415.288377229226}, "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", "Pakistan"]}, "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": 27.5}, "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": 62.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "62.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 60.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 63.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[60.32, 28.32], [59.97, 28.47], [59.75, 29.0], [59.97, 29.53], [60.5, 29.75], [61.03, 29.53], [61.18, 29.18], [61.53, 29.03], [61.68, 28.68], [61.75, 28.65], [62.0, 28.75], [62.53, 28.53], [62.68, 28.18], [62.75, 28.15], [63.0, 28.25], [63.53, 28.03], [63.75, 27.5], [63.65, 27.25], [63.75, 27.0], [63.53, 26.47], [63.18, 26.32], [63.03, 25.97], [62.5, 25.75], [62.25, 25.85], [62.0, 25.75], [61.5, 25.96], [61.0, 25.75], [60.75, 25.85], [60.5, 25.75], [60.25, 25.85], [60.0, 25.75], [59.47, 25.97], [59.25, 26.5], [59.47, 27.03], [59.82, 27.18], [59.85, 27.25], [59.75, 27.5], [59.97, 28.03], [60.32, 28.18], [60.35, 28.25], [60.32, 28.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[59.85, 27.25], [59.75, 27.5], [59.97, 28.03], [60.32, 28.18], [60.35, 28.25], [60.32, 28.32], [59.97, 28.47], [59.75, 29.0], [59.97, 29.53], [60.5, 29.75], [61.03, 29.53], [61.18, 29.18], [61.53, 29.03], [61.68, 28.68], [61.75, 28.65], [62.0, 28.75], [62.53, 28.53], [62.68, 28.18], [62.75, 28.15], [63.0, 28.25], [63.53, 28.03], [63.75, 27.5], [63.65, 27.25], [63.75, 27.0], [63.53, 26.47], [63.18, 26.32], [63.03, 25.97], [62.5, 25.75], [62.25, 25.85], [62.0, 25.75], [61.5, 25.96], [61.0, 25.75], [60.75, 25.85], [60.5, 25.75], [60.25, 25.85], [60.0, 25.75], [59.47, 25.97], [59.25, 26.5], [59.47, 27.03], [59.82, 27.18], [59.85, 27.25]]]]}, "2025-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[59.85, 27.25], [59.75, 27.5], [59.97, 28.03], [60.32, 28.18], [60.35, 28.25], [60.32, 28.32], [59.97, 28.47], [59.75, 29.0], [59.97, 29.53], [60.5, 29.75], [61.03, 29.53], [61.18, 29.18], [61.53, 29.03], [61.68, 28.68], [61.75, 28.65], [62.0, 28.75], [62.53, 28.53], [62.68, 28.18], [62.75, 28.15], [63.0, 28.25], [63.53, 28.03], [63.75, 27.5], [63.65, 27.25], [63.75, 27.0], [63.53, 26.47], [63.18, 26.32], [63.03, 25.97], [62.5, 25.75], [62.25, 25.85], [62.0, 25.75], [61.5, 25.96], [61.0, 25.75], [60.75, 25.85], [60.5, 25.75], [60.25, 25.85], [60.0, 25.75], [59.47, 25.97], [59.25, 26.5], [59.47, 27.03], [59.82, 27.18], [59.85, 27.25]]]]}, "2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[59.85, 27.25], [59.75, 27.5], [59.97, 28.03], [60.32, 28.18], [60.35, 28.25], [60.32, 28.32], [59.97, 28.47], [59.75, 29.0], [59.97, 29.53], [60.5, 29.75], [61.03, 29.53], [61.18, 29.18], [61.53, 29.03], [61.68, 28.68], [61.75, 28.65], [62.0, 28.75], [62.53, 28.53], [62.68, 28.18], [62.75, 28.15], [63.0, 28.25], [63.53, 28.03], [63.75, 27.5], [63.65, 27.25], [63.75, 27.0], [63.53, 26.47], [63.18, 26.32], [63.03, 25.97], [62.5, 25.75], [62.25, 25.85], [62.0, 25.75], [61.5, 25.96], [61.0, 25.75], [60.75, 25.85], [60.5, 25.75], [60.25, 25.85], [60.0, 25.75], [59.47, 25.97], [59.25, 26.5], [59.47, 27.03], [59.82, 27.18], [59.85, 27.25]]]]}, "2025-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[61.0, 27.25], [60.47, 27.47], [60.25, 28.0], [60.47, 28.53], [61.0, 28.75], [61.53, 28.53], [61.7, 28.13], [62.0, 28.25], [62.25, 28.15], [62.5, 28.25], [63.03, 28.03], [63.18, 27.68], [63.53, 27.53], [63.75, 27.0], [63.53, 26.47], [63.0, 26.25], [62.75, 26.35], [62.5, 26.25], [61.97, 26.47], [61.82, 26.82], [61.47, 26.97], [61.3, 27.38], [61.0, 27.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.778771477763371}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.566368687562163}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.110915351636493, 5.435531986120964, 6.428881003639958, 5.348364512125727]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.8485529581706146, 0.6377655029297102, 2.0559377034505246, 4.779663340250693]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.474187508445053, -6.1700793090818005, -5.1394067816198294, -5.194271527137312]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.778771477763371, -7.293651378310642, -6.557264110699293, -5.985806102519234]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6610802420752278, -2.0086258330386513, -1.6883919877411577, -1.5638656623713396]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0087490363796734, -2.45650483362496, -1.8915121426366643, -1.7036678075184848]}}