{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:20.843929", "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": "2023-Apr-07_to_2023-Apr-10_75.5_19.0"}, "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": 2023040000379}, "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": "April 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 10 2023"}, "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": 98887.54944298834}, "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": 19.0}, "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": 75.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 74.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 79.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[73.97, 19.53], [74.32, 19.68], [74.47, 20.03], [74.82, 20.18], [74.97, 20.53], [75.32, 20.68], [75.47, 21.03], [76.0, 21.25], [76.25, 21.15], [76.32, 21.18], [76.47, 21.53], [76.82, 21.68], [76.97, 22.03], [77.5, 22.25], [77.75, 22.15], [78.0, 22.25], [78.25, 22.15], [78.5, 22.25], [78.75, 22.15], [79.0, 22.25], [79.53, 22.03], [79.75, 21.5], [79.53, 20.97], [79.0, 20.75], [78.75, 20.85], [78.68, 20.82], [78.65, 20.75], [78.75, 20.5], [78.65, 20.25], [78.75, 20.0], [78.53, 19.47], [78.13, 19.3], [78.25, 19.0], [78.03, 18.47], [77.5, 18.25], [77.25, 18.35], [77.0, 18.25], [76.75, 18.35], [76.5, 18.25], [76.25, 18.35], [76.18, 18.32], [76.15, 18.25], [76.25, 18.0], [76.03, 17.47], [75.68, 17.32], [75.53, 16.97], [75.0, 16.75], [74.47, 16.97], [74.32, 17.32], [73.97, 17.47], [73.75, 18.0], [73.85, 18.25], [73.75, 18.5], [73.85, 18.75], [73.75, 19.0], [73.97, 19.53]]]]}}, "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": {"2023-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.75, 18.5], [73.85, 18.75], [73.75, 19.0], [73.97, 19.53], [74.32, 19.68], [74.47, 20.03], [74.82, 20.18], [74.97, 20.53], [75.32, 20.68], [75.47, 21.03], [76.0, 21.25], [76.25, 21.15], [76.32, 21.18], [76.47, 21.53], [76.82, 21.68], [76.97, 22.03], [77.5, 22.25], [77.75, 22.15], [78.0, 22.25], [78.25, 22.15], [78.5, 22.25], [78.75, 22.15], [79.0, 22.25], [79.53, 22.03], [79.75, 21.5], [79.53, 20.97], [79.0, 20.75], [78.75, 20.85], [78.68, 20.82], [78.65, 20.75], [78.75, 20.5], [78.65, 20.25], [78.75, 20.0], [78.53, 19.47], [78.13, 19.3], [78.25, 19.0], [78.03, 18.47], [77.5, 18.25], [77.25, 18.35], [77.0, 18.25], [76.75, 18.35], [76.5, 18.25], [76.25, 18.35], [76.18, 18.32], [76.15, 18.25], [76.25, 18.0], [76.03, 17.47], [75.68, 17.32], [75.53, 16.97], [75.0, 16.75], [74.47, 16.97], [74.32, 17.32], [73.97, 17.47], [73.75, 18.0], [73.85, 18.25], [73.75, 18.5]]]]}, "2023-04-08T11:30:00.000000000": 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19.53], [76.25, 19.0], [76.03, 18.47], [75.68, 18.32], [75.53, 17.97], [75.0, 17.75], [74.47, 17.97], [74.25, 18.5], [74.47, 19.03], [74.82, 19.18], [74.97, 19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.20475346860286}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5906226249916573}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.725973958433656, 26.207105464799724, 28.28709422615964, 28.674012998066075]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.50310227230807, 24.240391266217046, 26.24790486649846, 28.28660844154365]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2331157048807833, -4.799491659066226, -2.7870208046131277, -2.7786976340438514]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.485423743422416, -6.20475346860286, -4.128461118511723, -2.7950964570759993]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7426486550456652, -2.56171192331641, -1.4558906294524203, -1.3306866983366135]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4104221077853767, -3.295833910390223, -1.9919329755113802, -1.3572559618597846]}}