{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:21.803632", "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-Jul-18_to_2023-Jul-22_77.0_16.5"}, "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": 2023070000540}, "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": "July 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 22 2023"}, "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": 230279.0936358712}, "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": 16.5}, "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": 77.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 75.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 80.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[80.0, 15.25], [79.75, 15.35], [79.68, 15.32], [79.53, 14.97], [79.0, 14.75], [78.75, 14.85], [78.68, 14.82], [78.53, 14.47], [78.0, 14.25], [77.75, 14.35], [77.5, 14.25], [77.25, 14.35], [77.0, 14.25], [76.47, 14.47], [76.32, 14.82], [76.25, 14.85], [76.0, 14.75], [75.47, 14.97], [75.32, 15.32], [74.97, 15.47], [74.82, 15.82], [74.47, 15.97], [74.25, 16.5], [74.47, 17.03], [74.82, 17.18], [74.97, 17.53], [75.32, 17.68], [75.35, 17.75], [75.25, 18.0], [75.47, 18.53], [75.82, 18.68], [75.85, 18.75], [75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [76.75, 19.65], [77.0, 19.75], [77.25, 19.65], [77.5, 19.75], [77.75, 19.65], [77.82, 19.68], [77.97, 20.03], [78.5, 20.25], [78.75, 20.15], [79.0, 20.25], [79.25, 20.15], [79.5, 20.25], [80.03, 20.03], [80.18, 19.68], [80.53, 19.53], [80.75, 19.0], [80.54, 18.5], [80.68, 18.18], [81.03, 18.03], [81.25, 17.5], [81.04, 17.0], [81.25, 16.5], [81.03, 15.97], [80.68, 15.82], [80.53, 15.47], [80.0, 15.25]]]]}}, "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": {"2023-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 15.97], [74.25, 16.5], [74.47, 17.03], [74.82, 17.18], [74.97, 17.53], [75.32, 17.68], [75.35, 17.75], [75.25, 18.0], [75.47, 18.53], [75.82, 18.68], [75.85, 18.75], [75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [76.75, 19.65], [77.0, 19.75], [77.25, 19.65], [77.5, 19.75], [77.75, 19.65], [77.82, 19.68], [77.97, 20.03], [78.5, 20.25], [78.75, 20.15], [79.0, 20.25], [79.25, 20.15], [79.5, 20.25], [80.03, 20.03], [80.18, 19.68], [80.53, 19.53], [80.75, 19.0], [80.54, 18.5], [80.68, 18.18], [81.03, 18.03], [81.25, 17.5], [81.04, 17.0], [81.25, 16.5], [81.03, 15.97], [80.68, 15.82], [80.53, 15.47], [80.0, 15.25], [79.75, 15.35], [79.5, 15.25], [79.25, 15.35], [79.0, 15.25], [78.75, 15.35], [78.68, 15.32], [78.65, 15.25], [78.75, 15.0], [78.53, 14.47], [78.0, 14.25], [77.75, 14.35], [77.5, 14.25], [77.25, 14.35], [77.0, 14.25], [76.47, 14.47], [76.32, 14.82], [76.25, 14.85], [76.0, 14.75], [75.47, 14.97], [75.32, 15.32], [74.97, 15.47], [74.82, 15.82], [74.47, 15.97]]]]}, "2023-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 15.97], [74.25, 16.5], [74.47, 17.03], [74.82, 17.18], [74.97, 17.53], [75.32, 17.68], [75.35, 17.75], [75.25, 18.0], [75.47, 18.53], [75.82, 18.68], [75.85, 18.75], [75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [76.75, 19.65], [77.0, 19.75], [77.25, 19.65], [77.5, 19.75], [77.75, 19.65], [77.82, 19.68], [77.97, 20.03], [78.5, 20.25], [78.75, 20.15], [79.0, 20.25], [79.25, 20.15], [79.5, 20.25], [80.03, 20.03], [80.18, 19.68], [80.53, 19.53], [80.75, 19.0], [80.54, 18.5], [80.68, 18.18], [81.03, 18.03], [81.25, 17.5], [81.04, 17.0], [81.25, 16.5], [81.03, 15.97], [80.68, 15.82], [80.53, 15.47], [80.0, 15.25], [79.75, 15.35], [79.68, 15.32], [79.53, 14.97], [79.0, 14.75], [78.75, 14.85], [78.68, 14.82], [78.53, 14.47], [78.0, 14.25], [77.75, 14.35], [77.5, 14.25], [77.25, 14.35], [77.0, 14.25], [76.47, 14.47], [76.32, 14.82], [76.25, 14.85], [76.0, 14.75], [75.47, 14.97], [75.32, 15.32], [74.97, 15.47], [74.82, 15.82], [74.47, 15.97]]]]}, "2023-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.47, 15.97], [74.25, 16.5], [74.47, 17.03], [74.82, 17.18], [74.97, 17.53], [75.32, 17.68], [75.35, 17.75], [75.25, 18.0], [75.47, 18.53], [75.82, 18.68], [75.85, 18.75], [75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [76.75, 19.65], [77.0, 19.75], [77.25, 19.65], [77.5, 19.75], [77.75, 19.65], [77.82, 19.68], [77.97, 20.03], [78.5, 20.25], [78.75, 20.15], [79.0, 20.25], [79.25, 20.15], [79.5, 20.25], [80.03, 20.03], [80.18, 19.68], [80.53, 19.53], [80.75, 19.0], [80.54, 18.5], [80.68, 18.18], [81.03, 18.03], [81.25, 17.5], [81.04, 17.0], [81.25, 16.5], [81.03, 15.97], [80.68, 15.82], [80.53, 15.47], [80.0, 15.25], [79.75, 15.35], [79.68, 15.32], [79.53, 14.97], [79.0, 14.75], [78.75, 14.85], [78.68, 14.82], [78.53, 14.47], [78.0, 14.25], [77.75, 14.35], [77.5, 14.25], [77.25, 14.35], [77.0, 14.25], [76.47, 14.47], [76.32, 14.82], [76.25, 14.85], [76.0, 14.75], [75.47, 14.97], [75.32, 15.32], [74.97, 15.47], [74.82, 15.82], [74.47, 15.97]]]]}, "2023-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.75, 17.0], [74.97, 17.53], [75.32, 17.68], [75.35, 17.75], [75.25, 18.0], [75.47, 18.53], [75.82, 18.68], [75.85, 18.75], [75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [76.75, 19.65], [77.0, 19.75], [77.25, 19.65], [77.5, 19.75], [77.75, 19.65], [77.82, 19.68], [77.97, 20.03], [78.5, 20.25], [78.75, 20.15], [79.0, 20.25], [79.25, 20.15], [79.5, 20.25], [80.03, 20.03], [80.18, 19.68], [80.53, 19.53], [80.75, 19.0], [80.53, 18.47], [80.18, 18.32], [80.15, 18.25], [80.25, 18.0], [80.15, 17.75], [80.18, 17.68], [80.53, 17.53], [80.68, 17.18], [81.03, 17.03], [81.25, 16.5], [81.03, 15.97], [80.68, 15.82], [80.53, 15.47], [80.0, 15.25], [79.75, 15.35], [79.68, 15.32], [79.53, 14.97], [79.0, 14.75], [78.75, 14.85], [78.68, 14.82], [78.53, 14.47], [78.0, 14.25], [77.75, 14.35], [77.5, 14.25], [76.97, 14.47], [76.82, 14.82], [76.75, 14.85], [76.5, 14.75], [75.97, 14.97], [75.82, 15.32], [75.47, 15.47], [75.32, 15.82], [74.97, 15.97], [74.75, 16.5], [74.85, 16.75], [74.75, 17.0]]]]}, "2023-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.97, 18.03], [76.5, 18.25], [76.75, 18.15], [77.0, 18.25], [77.25, 18.15], [77.5, 18.25], [78.03, 18.03], [78.25, 17.5], [78.04, 17.0], [78.25, 16.5], [78.07, 16.07], [78.5, 16.25], [78.75, 16.15], [78.82, 16.18], [78.97, 16.53], [79.5, 16.75], [79.75, 16.65], [80.0, 16.75], [80.53, 16.53], [80.75, 16.0], [80.53, 15.47], [80.0, 15.25], [79.75, 15.35], [79.68, 15.32], [79.53, 14.97], [79.0, 14.75], [78.75, 14.85], [78.5, 14.75], [77.97, 14.97], [77.75, 15.5], [77.93, 15.93], [77.5, 15.75], [77.25, 15.85], [77.0, 15.75], [76.47, 15.97], [76.32, 16.32], [75.97, 16.47], [75.75, 17.0], [75.85, 17.25], [75.75, 17.5], [75.97, 18.03]]], [[[75.75, 19.0], [75.97, 19.53], [76.5, 19.75], [77.03, 19.53], [77.25, 19.0], [77.03, 18.47], [76.5, 18.25], [75.97, 18.47], [75.75, 19.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.6941759644877266}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.604628315905452}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.68360055797558, 24.620127981520625, 24.50332830516726, 24.849262063206027, 25.68836677342091]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.072641822512594, 23.053514085616314, 22.63320285833845, 23.414113508148205, 24.249330297928793]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5499076971345094, -2.704408191556097, -2.7770360715231632, -2.4621103539470286, -2.0234002486016274]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2297181342006525, -3.6941759644877266, -3.6675386488414006, -3.1959616546503185, -2.722929429072906]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7307620156113412, -1.8297523843527914, -1.9353002666968848, -1.726925896469518, -1.3846044382104317]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1252587650806234, -2.3799652236663373, -2.623100126331209, -2.2962968991254336, -1.7201765981334574]}}