{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:47.935549", "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-18_to_2026-Mar-21_74.5_31.0"}, "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": 2026030000563}, "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 18 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 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": 63954.96179546379}, "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", "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": 31.0}, "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": 74.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "74.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 72.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 77.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[73.0, 31.75], [73.25, 31.65], [73.32, 31.68], [73.47, 32.03], [74.0, 32.25], [74.25, 32.15], [74.5, 32.25], [75.0, 32.04], [75.5, 32.25], [76.03, 32.03], [76.18, 31.68], [76.53, 31.53], [76.68, 31.18], [76.75, 31.15], [77.0, 31.25], [77.53, 31.03], [77.75, 30.5], [77.65, 30.25], [77.75, 30.0], [77.65, 29.75], [77.75, 29.5], [77.65, 29.25], [77.75, 29.0], [77.65, 28.75], [77.75, 28.5], [77.53, 27.97], [77.0, 27.75], [76.75, 27.85], [76.5, 27.75], [75.97, 27.97], [75.75, 28.5], [75.97, 29.03], [76.32, 29.18], [76.35, 29.25], [76.32, 29.32], [76.25, 29.35], [76.0, 29.25], [75.47, 29.47], [75.32, 29.82], [75.25, 29.85], [75.0, 29.75], [74.75, 29.85], [74.5, 29.75], [74.0, 29.96], [73.5, 29.75], [72.97, 29.97], [72.82, 30.32], [72.47, 30.47], [72.25, 31.0], [72.47, 31.53], [73.0, 31.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "Tibetan-Plateau", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-18T11:30:00.000000000": 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.715476007204529}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.029531390662845}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.960721951439325, 18.254581281873982, 17.869858466254357, 19.366186466923523]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.25700403849288, 16.999145762125693, 16.28426005045577, 18.24647165934249]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.035980663730925, -4.00262502963525, -4.60354911675456, -3.2975415199397653]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.984645144258764, -5.351719666358747, -6.715476007204529, -4.119098089853537]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5458026896423345, -1.6497981526487955, -1.929117586350179, -1.353515859377577]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8521992705458024, -2.1880845688036152, -2.7214047810790816, -1.5927495088016073]}}