{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:47.567446", "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": "2015-Apr-24_to_2015-Apr-28_78.0_10.0"}, "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": 2015040000907}, "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 24 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 57861.001309460305}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "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": ["Laccadive Sea"]}, "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": 10.0}, "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": 78.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "78.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 77.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 79.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.97, 7.97], [76.75, 8.5], [76.97, 9.03], [77.5, 9.25], [78.03, 9.03], [78.25, 8.5], [78.03, 7.97], [77.5, 7.75], [76.97, 7.97]]], [[[78.0, 11.25], [78.25, 11.15], [78.5, 11.25], [79.03, 11.03], [79.25, 10.5], [79.03, 9.97], [78.68, 9.82], [78.53, 9.47], [78.0, 9.25], [77.47, 9.47], [77.25, 10.0], [77.35, 10.25], [77.25, 10.5], [77.47, 11.03], [78.0, 11.25]]]]}, "2015-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.85, 9.25], [76.75, 9.5], [76.85, 9.75], [76.75, 10.0], [76.85, 10.25], [76.75, 10.5], [76.97, 11.03], [77.32, 11.18], [77.47, 11.53], [78.0, 11.75], [78.25, 11.65], [78.5, 11.75], [79.03, 11.53], [79.18, 11.18], [79.25, 11.15], [79.5, 11.25], [80.03, 11.03], [80.25, 10.5], [80.03, 9.97], [79.68, 9.82], [79.53, 9.47], [79.18, 9.32], [79.15, 9.25], [79.25, 9.0], [79.03, 8.47], [78.68, 8.32], [78.53, 7.97], [78.0, 7.75], [77.75, 7.85], [77.5, 7.75], [76.97, 7.97], [76.75, 8.5], [76.85, 8.75], [76.75, 9.0], [76.85, 9.25]]]]}, "2015-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.85, 9.25], [76.75, 9.5], [76.85, 9.75], [76.75, 10.0], [76.85, 10.25], [76.75, 10.5], [76.97, 11.03], [77.32, 11.18], [77.47, 11.53], [78.0, 11.75], [78.25, 11.65], [78.5, 11.75], [79.03, 11.53], [79.18, 11.18], [79.25, 11.15], [79.5, 11.25], [80.03, 11.03], [80.25, 10.5], [80.03, 9.97], [79.68, 9.82], [79.53, 9.47], [79.18, 9.32], [79.15, 9.25], [79.25, 9.0], [79.03, 8.47], [78.68, 8.32], [78.53, 7.97], [78.0, 7.75], [77.75, 7.85], [77.5, 7.75], [76.97, 7.97], [76.75, 8.5], [76.85, 8.75], [76.75, 9.0], [76.85, 9.25]]]]}, "2015-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.85, 9.25], [76.75, 9.5], [76.85, 9.75], [76.75, 10.0], [76.85, 10.25], [76.75, 10.5], [76.97, 11.03], [77.32, 11.18], [77.47, 11.53], [78.0, 11.75], [78.25, 11.65], [78.5, 11.75], [79.03, 11.53], [79.18, 11.18], [79.25, 11.15], [79.5, 11.25], [80.03, 11.03], [80.25, 10.5], [80.03, 9.97], [79.68, 9.82], [79.53, 9.47], [79.18, 9.32], [79.15, 9.25], [79.25, 9.0], [79.03, 8.47], [78.68, 8.32], [78.53, 7.97], [78.0, 7.75], [77.75, 7.85], [77.5, 7.75], [76.97, 7.97], [76.75, 8.5], [76.85, 8.75], [76.75, 9.0], [76.85, 9.25]]]]}, "2015-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[77.35, 9.75], [77.25, 10.0], [77.47, 10.53], [78.0, 10.75], [78.53, 10.53], [78.68, 10.18], [79.03, 10.03], [79.25, 9.5], [79.03, 8.97], [78.68, 8.82], [78.53, 8.47], [78.0, 8.25], [77.47, 8.47], [77.25, 9.0], [77.35, 9.25], [77.25, 9.5], [77.35, 9.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.371366903035039}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.570904085519137}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.784766433108757, 27.910597665360626, 28.4655381355729, 28.38176083152979, 29.38636105521084]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.529627016929908, 25.53869482917861, 25.827212127563314, 25.68314732229618, 28.85753544265833]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.165909030891612, -2.905534263396081, -2.406006403050149, -2.5154798665620377, -2.4329348270050986]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3724167213858323, -4.371366903035039, -3.289512319695973, -3.7599499180673774, -2.72320110278622]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.412875870370626, -2.140937483658172, -1.8362235827156497, -1.9018745935102643, -1.599921354889899]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4182851344261016, -3.022022331173048, -2.32010023177224, -2.3501025764032057, -1.721686628985114]}}