{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:23:25.739874", "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": "2021-Apr-11_to_2021-Apr-16_75.5_17.5"}, "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": 2021040000463}, "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 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 16 2021"}, "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": 147476.07508655213}, "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": 17.5}, "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": 80.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[77.0, 15.25], [76.5, 15.457], [76.0, 15.25], [75.75, 15.354], [75.5, 15.25], [75.25, 15.354], [75.0, 15.25], [74.47, 15.47], 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"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": {"2021-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.25, 16.5], [76.46966991411009, 17.03033008588991], [77.0, 17.25], [77.25, 17.146446609406727], [77.5, 17.25], [78.03033008588991, 17.03033008588991], [78.25, 16.5], [78.03033008588991, 15.969669914110089], [77.67677669529664, 15.823223304703363], [77.53033008588991, 15.469669914110089], [77.0, 15.25], [76.46966991411009, 15.469669914110089], [76.25, 16.0], [76.35355339059328, 16.25], [76.25, 16.5]]], [[[75.5, 17.75], [74.96966991411009, 17.96966991411009], [74.75, 18.5], [74.96966991411009, 19.03033008588991], [75.5, 19.25], [76.0, 19.042893218813454], [76.5, 19.25], [77.03033008588991, 19.03033008588991], [77.25, 18.5], [77.03033008588991, 17.96966991411009], [76.5, 17.75], [76.0, 17.957106781186546], 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