{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:24.727622", "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-Jan-23_to_2023-Jan-26_75.5_3.5"}, "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": 2023010001091}, "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": "January 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 26 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": 141766.81480546377}, "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": ["Maldives"]}, "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": ["Indian Ocean", "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": 3.5}, "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": 73.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 76.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[72.35, 4.75], [72.25, 5.0], [72.47, 5.53], [72.82, 5.68], [72.97, 6.03], [73.32, 6.18], [73.47, 6.53], [74.0, 6.75], [74.25, 6.65], [74.5, 6.75], [74.75, 6.65], [75.0, 6.75], [75.53, 6.53], [75.68, 6.18], [76.03, 6.03], [76.18, 5.68], [76.25, 5.65], [76.5, 5.75], [77.03, 5.53], [77.25, 5.0], [77.15, 4.75], [77.25, 4.5], [77.15, 4.25], [77.25, 4.0], [77.15, 3.75], [77.25, 3.5], [77.04, 3.0], [77.25, 2.5], [77.03, 1.97], [76.5, 1.75], [75.97, 1.97], [75.82, 2.32], [75.75, 2.35], [75.5, 2.25], [75.25, 2.35], [75.0, 2.25], [74.75, 2.35], [74.5, 2.25], [74.0, 2.46], [73.5, 2.25], [72.97, 2.47], [72.82, 2.82], [72.47, 2.97], [72.25, 3.5], [72.35, 3.75], [72.25, 4.0], [72.35, 4.25], [72.25, 4.5], [72.35, 4.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.25, 4.0], [72.35, 4.25], [72.25, 4.5], [72.35, 4.75], [72.25, 5.0], [72.47, 5.53], [72.82, 5.68], [72.97, 6.03], [73.32, 6.18], [73.47, 6.53], [74.0, 6.75], [74.25, 6.65], [74.5, 6.75], [74.75, 6.65], [75.0, 6.75], [75.53, 6.53], [75.68, 6.18], [76.03, 6.03], [76.18, 5.68], [76.25, 5.65], [76.5, 5.75], [77.03, 5.53], [77.25, 5.0], [77.15, 4.75], [77.25, 4.5], [77.15, 4.25], [77.25, 4.0], [77.15, 3.75], [77.25, 3.5], [77.04, 3.0], [77.25, 2.5], [77.03, 1.97], [76.5, 1.75], [75.97, 1.97], [75.82, 2.32], [75.75, 2.35], [75.5, 2.25], [75.25, 2.35], [75.0, 2.25], [74.75, 2.35], [74.5, 2.25], [74.0, 2.46], [73.5, 2.25], [72.97, 2.47], [72.82, 2.82], [72.47, 2.97], [72.25, 3.5], [72.35, 3.75], [72.25, 4.0]]]]}, "2023-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.25, 4.0], [72.35, 4.25], [72.25, 4.5], [72.35, 4.75], [72.25, 5.0], [72.47, 5.53], [72.82, 5.68], [72.97, 6.03], [73.32, 6.18], [73.47, 6.53], [74.0, 6.75], [74.25, 6.65], [74.5, 6.75], [74.75, 6.65], [75.0, 6.75], [75.53, 6.53], [75.68, 6.18], [76.03, 6.03], [76.18, 5.68], [76.25, 5.65], [76.5, 5.75], [77.03, 5.53], [77.25, 5.0], [77.15, 4.75], [77.25, 4.5], [77.15, 4.25], [77.25, 4.0], [77.15, 3.75], [77.25, 3.5], [77.04, 3.0], [77.25, 2.5], [77.03, 1.97], [76.5, 1.75], [75.97, 1.97], [75.82, 2.32], [75.75, 2.35], [75.5, 2.25], [75.25, 2.35], [75.0, 2.25], [74.75, 2.35], [74.5, 2.25], [74.0, 2.46], [73.5, 2.25], [72.97, 2.47], [72.82, 2.82], [72.47, 2.97], [72.25, 3.5], [72.35, 3.75], [72.25, 4.0]]]]}, "2023-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.25, 4.0], [72.35, 4.25], [72.25, 4.5], [72.35, 4.75], [72.25, 5.0], [72.47, 5.53], [72.82, 5.68], [72.97, 6.03], [73.32, 6.18], [73.47, 6.53], [74.0, 6.75], [74.25, 6.65], [74.5, 6.75], [74.75, 6.65], [75.0, 6.75], [75.53, 6.53], [75.68, 6.18], [76.03, 6.03], [76.18, 5.68], [76.25, 5.65], [76.5, 5.75], [77.03, 5.53], [77.25, 5.0], [77.15, 4.75], [77.25, 4.5], [77.15, 4.25], [77.25, 4.0], [77.15, 3.75], [77.25, 3.5], [77.04, 3.0], [77.25, 2.5], [77.03, 1.97], [76.5, 1.75], [75.97, 1.97], [75.82, 2.32], [75.75, 2.35], [75.5, 2.25], [75.25, 2.35], [75.0, 2.25], [74.75, 2.35], [74.5, 2.25], [74.0, 2.46], [73.5, 2.25], [72.97, 2.47], [72.82, 2.82], [72.47, 2.97], [72.25, 3.5], [72.35, 3.75], [72.25, 4.0]]]]}, "2023-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.5, 2.75], [74.97, 2.97], [74.75, 3.5], [74.97, 4.03], [75.5, 4.25], [75.75, 4.15], [76.0, 4.25], [76.53, 4.03], [76.75, 3.5], [76.53, 2.97], [76.0, 2.75], [75.75, 2.85], [75.5, 2.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.8999839890966541}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1635382677475556}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.00228751523673, 25.302299012340484, 25.758113543640548, 26.134543925757498]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.751176685458574, 24.95986876353726, 25.299801368514125, 26.086510751708317]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8540271854446273, -1.5510567470105368, -1.1020452145838384, -0.7837083604318309]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.061120319808083, -1.8999839890966541, -1.5777735505325836, -0.8317008698804784]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5222572298892814, -2.729960073697355, -2.0004961756222257, -1.390013106621168]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9399468734769807, -3.5053389367927412, -2.8825638699674414, -1.4542990518464896]}}