{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:53.284937", "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-Aug-10_to_2025-Aug-15_77.5_15.0"}, "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": 2025080000400}, "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 10 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2025"}, "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": 122339.73293993832}, "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": ["India"]}, "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": 15.0}, "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": 77.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 75.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 80.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[77.03, 13.47], [76.5, 13.25], [75.97, 13.47], [75.82, 13.82], [75.47, 13.97], [75.25, 14.5], [75.38, 14.8], [74.97, 14.97], [74.75, 15.5], [74.85, 15.75], [74.75, 16.0], [74.97, 16.53], [75.32, 16.68], [75.47, 17.03], [76.0, 17.25], [76.25, 17.15], [76.5, 17.25], [76.75, 17.15], [77.0, 17.25], [77.25, 17.15], [77.5, 17.25], [77.75, 17.15], [78.0, 17.25], [78.53, 17.03], [78.68, 16.68], [78.75, 16.65], [79.0, 16.75], [79.53, 16.53], [79.68, 16.18], [80.03, 16.03], [80.25, 15.5], [80.03, 14.97], [79.68, 14.82], [79.63, 14.7], [80.03, 14.53], [80.18, 14.18], [80.53, 14.03], [80.75, 13.5], [80.65, 13.25], [80.75, 13.0], [80.53, 12.47], [80.0, 12.25], [79.75, 12.35], [79.5, 12.25], [79.25, 12.35], [79.0, 12.25], [78.47, 12.47], [78.25, 13.0], [78.35, 13.25], [78.25, 13.5], [78.35, 13.75], [78.32, 13.82], [78.25, 13.85], [78.0, 13.75], [77.75, 13.85], [77.5, 13.75], [77.25, 13.85], [77.18, 13.82], [77.03, 13.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.35, 13.75], [78.25, 14.0], [78.47, 14.53], [79.0, 14.75], [79.53, 14.53], [79.68, 14.18], [79.75, 14.15], [80.0, 14.25], [80.53, 14.03], [80.75, 13.5], [80.65, 13.25], [80.75, 13.0], [80.53, 12.47], [80.0, 12.25], [79.75, 12.35], [79.5, 12.25], [79.25, 12.35], [79.0, 12.25], [78.47, 12.47], [78.25, 13.0], [78.35, 13.25], [78.25, 13.5], [78.35, 13.75]]], [[[77.5, 14.25], [76.97, 14.47], [76.75, 15.0], [76.97, 15.53], [77.5, 15.75], [78.03, 15.53], [78.25, 15.0], [78.03, 14.47], [77.5, 14.25]]]]}, "2025-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.47, 16.03], [78.0, 16.25], [78.53, 16.03], [78.75, 15.5], [78.65, 15.25], [78.75, 15.0], [78.57, 14.57], [79.0, 14.75], [79.25, 14.65], [79.5, 14.75], [80.03, 14.53], [80.18, 14.18], [80.53, 14.03], [80.75, 13.5], [80.65, 13.25], [80.75, 13.0], [80.53, 12.47], [80.0, 12.25], [79.75, 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[75.38, 14.8], [74.97, 14.97], [74.75, 15.5], [74.85, 15.75], [74.75, 16.0]]]]}, "2025-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.47, 13.97], [75.25, 14.5], [75.47, 15.03], [76.0, 15.25], [76.53, 15.03], [76.68, 14.68], [77.03, 14.53], [77.25, 14.0], [77.03, 13.47], [76.5, 13.25], [75.97, 13.47], [75.82, 13.82], [75.47, 13.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.533337369613207}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.482987484055985}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.923897043863974, 26.8122822385846, 25.288065064259115, 24.15423829613661, 24.291193513195935, 22.95691070556643]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.543637847900413, 25.538460032145224, 23.187347666422568, 22.24129130045577, 22.338625844319665, 22.84106597900393]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7787054060239669, -1.8146556729584673, -2.1495403435973404, -3.093994469307383, -2.589578345562188, -1.1937675836579729]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0048520781686534, -2.059733126796857, -2.954389983307294, -4.533337369613207, -3.3650614523637046, -1.2243391359661473]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5176391020112585, -1.4896885844734449, -1.6959722146297456, -2.464357332834487, -2.1226197969687988, -1.3559754363810002]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.727588956951319, -1.8005048114601572, -2.107448686870566, -2.9713848511312815, -2.5662768311039654, -1.368883817036913]}}