{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:52.277696", "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-Jan-21_to_2026-Jan-23_76.0_13.0"}, "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": 2026010000664}, "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 21 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 59891.12260486971}, "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": 13.0}, "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": 76.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "76.0\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": 77.0}, "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": 16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[74.75, 14.0], [74.85, 14.25], [74.75, 14.5], [74.85, 14.75], [74.75, 15.0], [74.97, 15.53], [75.32, 15.68], [75.47, 16.03], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.75, 16.0], [77.53, 15.47], [77.18, 15.32], [77.15, 15.25], [77.25, 15.0], [77.15, 14.75], [77.25, 14.5], [77.15, 14.25], [77.18, 14.18], [77.53, 14.03], [77.75, 13.5], [77.53, 12.97], [77.18, 12.82], [77.03, 12.47], [76.5, 12.25], [76.25, 12.35], [76.0, 12.25], [75.75, 12.35], [75.5, 12.25], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5], [74.85, 13.75], [74.75, 14.0]]]]}}, "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": {"2026-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.75, 13.5], [74.85, 13.75], [74.75, 14.0], [74.85, 14.25], [74.75, 14.5], [74.85, 14.75], [74.75, 15.0], [74.97, 15.53], [75.32, 15.68], [75.47, 16.03], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.75, 16.0], [77.53, 15.47], [77.18, 15.32], [77.15, 15.25], [77.25, 15.0], [77.15, 14.75], [77.25, 14.5], [77.15, 14.25], [77.18, 14.18], [77.53, 14.03], [77.75, 13.5], [77.53, 12.97], [77.18, 12.82], [77.03, 12.47], [76.5, 12.25], [76.25, 12.35], [76.0, 12.25], [75.75, 12.35], [75.5, 12.25], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5]]]]}, "2026-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.75, 13.5], [74.85, 13.75], [74.75, 14.0], [74.85, 14.25], [74.75, 14.5], [74.85, 14.75], [74.75, 15.0], [74.97, 15.53], [75.32, 15.68], [75.47, 16.03], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.75, 16.0], [77.53, 15.47], [77.18, 15.32], [77.15, 15.25], [77.25, 15.0], [77.15, 14.75], [77.25, 14.5], [77.15, 14.25], [77.18, 14.18], [77.53, 14.03], [77.75, 13.5], [77.53, 12.97], [77.18, 12.82], [77.03, 12.47], [76.5, 12.25], [76.25, 12.35], [76.0, 12.25], [75.75, 12.35], [75.5, 12.25], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5]]]]}, "2026-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.75, 13.5], [74.85, 13.75], [74.75, 14.0], [74.85, 14.25], [74.75, 14.5], [74.85, 14.75], [74.75, 15.0], [74.97, 15.53], [75.32, 15.68], [75.47, 16.03], [75.82, 16.18], [75.97, 16.53], [76.5, 16.75], [76.75, 16.65], [77.0, 16.75], [77.53, 16.53], [77.75, 16.0], [77.53, 15.47], [77.18, 15.32], [77.15, 15.25], [77.25, 15.0], [77.15, 14.75], [77.25, 14.5], [77.15, 14.25], [77.18, 14.18], [77.53, 14.03], [77.75, 13.5], [77.53, 12.97], [77.18, 12.82], [77.03, 12.47], [76.5, 12.25], [76.25, 12.35], [76.0, 12.25], [75.75, 12.35], [75.5, 12.25], [74.97, 12.47], [74.75, 13.0], [74.85, 13.25], [74.75, 13.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.746884758788269}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0102940500888367}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.57283910115558, 21.30653991699222, 21.390830230712936]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.913073476155603, 18.842518107096396, 18.904599761962913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8061354863739496, -2.1415499432389766, -2.0831967206535835]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.221287270738685, -2.746884758788269, -2.4347859475974474]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5286592729495463, -1.806268457271824, -1.728593585420666]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9308585287988884, -2.4314979229917086, -1.978328311833252]}}