{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:48.445316", "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-Mar-20_to_2026-Mar-23_82.0_28.0"}, "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": 2026030000616}, "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": "March 20 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2026"}, "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": 60676.05871913364}, "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", "Nepal"]}, "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": 28.0}, "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": 82.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "82.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 80.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 83.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[80.35, 25.75], [80.25, 26.0], [80.47, 26.53], [80.82, 26.68], [80.97, 27.03], [81.32, 27.18], [81.35, 27.25], [81.32, 27.32], [80.97, 27.47], [80.75, 28.0], [80.85, 28.25], [80.75, 28.5], [80.85, 28.75], [80.75, 29.0], [80.97, 29.53], [81.5, 29.75], [82.03, 29.53], [82.25, 29.0], [82.15, 28.75], [82.18, 28.68], [82.25, 28.65], [82.5, 28.75], [82.75, 28.65], [83.0, 28.75], [83.53, 28.53], [83.75, 28.0], [83.65, 27.75], [83.75, 27.5], [83.65, 27.25], [83.75, 27.0], [83.65, 26.75], [83.75, 26.5], [83.53, 25.97], [83.0, 25.75], [82.5, 25.96], [82.18, 25.82], [82.15, 25.75], [82.25, 25.5], [82.15, 25.25], [82.25, 25.0], [82.03, 24.47], [81.68, 24.32], [81.53, 23.97], [81.0, 23.75], [80.47, 23.97], [80.25, 24.5], [80.35, 24.75], [80.25, 25.0], [80.35, 25.25], [80.25, 25.5], [80.35, 25.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.25, 25.0], [80.35, 25.25], [80.25, 25.5], [80.35, 25.75], [80.25, 26.0], [80.47, 26.53], [80.82, 26.68], [80.97, 27.03], [81.32, 27.18], [81.35, 27.25], [81.32, 27.32], [80.97, 27.47], [80.75, 28.0], [80.85, 28.25], [80.75, 28.5], [80.85, 28.75], [80.75, 29.0], [80.97, 29.53], [81.5, 29.75], [82.03, 29.53], [82.25, 29.0], [82.15, 28.75], [82.18, 28.68], [82.25, 28.65], [82.5, 28.75], [82.75, 28.65], [83.0, 28.75], [83.53, 28.53], [83.75, 28.0], [83.65, 27.75], [83.75, 27.5], [83.65, 27.25], [83.75, 27.0], [83.65, 26.75], [83.75, 26.5], [83.53, 25.97], [83.0, 25.75], [82.5, 25.96], [82.18, 25.82], [82.15, 25.75], [82.25, 25.5], [82.15, 25.25], [82.25, 25.0], [82.03, 24.47], [81.68, 24.32], [81.53, 23.97], [81.0, 23.75], [80.47, 23.97], [80.25, 24.5], [80.35, 24.75], [80.25, 25.0]]]]}, "2026-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.25, 25.0], [80.35, 25.25], [80.25, 25.5], [80.35, 25.75], [80.25, 26.0], [80.47, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -6.018854455076564}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.736682621866627}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.87145154548415, 19.464189610336803, 21.17523808334812, 19.4298954433865]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.52302958170577, 12.272431945800804, 12.657685852050804, 18.581805165608728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2033666850658733, -4.834435545589785, -3.331903840078739, -2.565855784213511]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.00550761105427, -6.018854455076564, -4.324741845844869, -2.7141447810429895]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6746435073971866, -2.4688178937535676, -1.6497482125889353, -1.285537985647034]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1319449371532277, -3.0696978492453244, -2.0900641291816386, -1.3552718393335061]}}