{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:50.735994", "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-13_to_2023-Apr-20_48.0_6.0"}, "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": 2023040000545}, "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 13 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 203486.35027683253}, "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": ["Somalia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Indian-Ocean", "N.Eastern-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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"]}, "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": 6.0}, "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": 48.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 56.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.0, 7.25], [48.53, 7.03], [48.68, 6.68], [49.03, 6.53], [49.25, 6.0], [49.03, 5.47], [48.5, 5.25], [48.25, 5.35], [48.0, 5.25], [47.75, 5.35], [47.5, 5.25], [46.97, 5.47], [46.75, 6.0], [46.97, 6.53], [47.32, 6.68], [47.47, 7.03], [48.0, 7.25]]]]}, "2023-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.0, 7.25], [48.53, 7.03], [48.68, 6.68], [49.03, 6.53], [49.25, 6.0], [49.03, 5.47], [48.5, 5.25], [48.25, 5.35], [48.0, 5.25], [47.75, 5.35], [47.5, 5.25], [46.97, 5.47], [46.75, 6.0], [46.97, 6.53], [47.32, 6.68], [47.47, 7.03], [48.0, 7.25]]]]}, "2023-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.75, 6.0], [46.97, 6.53], [47.32, 6.68], [47.47, 7.03], [48.0, 7.25], [48.53, 7.03], [48.68, 6.68], [49.03, 6.53], [49.25, 6.0], [49.04, 5.5], [49.18, 5.18], [49.53, 5.03], [49.75, 4.5], [49.65, 4.25], [49.75, 4.0], [49.65, 3.75], [49.75, 3.5], [49.53, 2.97], [49.0, 2.75], [48.75, 2.85], [48.5, 2.75], [47.97, 2.97], [47.75, 3.5], [47.85, 3.75], [47.75, 4.0], [47.85, 4.25], [47.75, 4.5], [47.85, 4.75], [47.82, 4.82], [47.47, 4.97], [47.32, 5.32], [46.97, 5.47], [46.75, 6.0]]]]}, "2023-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.35, 6.25], [47.25, 6.5], [47.47, 7.03], [48.0, 7.25], [48.53, 7.03], [48.68, 6.68], [49.03, 6.53], [49.25, 6.0], [49.04, 5.5], [49.18, 5.18], [49.53, 5.03], [49.75, 4.5], [49.65, 4.25], [49.75, 4.0], [49.65, 3.75], [49.75, 3.5], [49.53, 2.97], [49.0, 2.75], [48.75, 2.85], [48.5, 2.75], [47.97, 2.97], [47.75, 3.5], [47.85, 3.75], [47.75, 4.0], [47.85, 4.25], [47.75, 4.5], [47.85, 4.75], [47.82, 4.82], [47.47, 4.97], [47.25, 5.5], [47.35, 5.75], [47.25, 6.0], [47.35, 6.25]]]]}, "2023-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.25, 3.65], [54.32, 3.68], [54.47, 4.03], [54.82, 4.18], [54.85, 4.25], [54.82, 4.32], [54.75, 4.35], [54.5, 4.25], [53.97, 4.47], [53.75, 5.0], [53.97, 5.53], [54.5, 5.75], [54.75, 5.65], [55.0, 5.75], [55.25, 5.65], [55.5, 5.75], [55.75, 5.65], [56.0, 5.75], [56.53, 5.53], [56.75, 5.0], [56.65, 4.75], [56.68, 4.68], [57.03, 4.53], [57.25, 4.0], [57.03, 3.47], [56.5, 3.25], [56.25, 3.35], [56.18, 3.32], [56.03, 2.97], [55.68, 2.82], [55.53, 2.47], [55.0, 2.25], [54.75, 2.35], [54.5, 2.25], [54.25, 2.35], [54.0, 2.25], [53.47, 2.47], [53.25, 3.0], [53.47, 3.53], [54.0, 3.75], [54.25, 3.65]]], [[[47.25, 6.5], [47.47, 7.03], [48.0, 7.25], [48.53, 7.03], [48.68, 6.68], [49.03, 6.53], [49.25, 6.0], [49.04, 5.5], [49.18, 5.18], [49.25, 5.15], [49.5, 5.25], [49.75, 5.15], [50.0, 5.25], [50.25, 5.15], [50.5, 5.25], [50.75, 5.15], [51.0, 5.25], [51.25, 5.15], [51.5, 5.25], [52.03, 5.03], [52.25, 4.5], [52.15, 4.25], [52.18, 4.18], [52.53, 4.03], [52.68, 3.68], [53.03, 3.53], [53.25, 3.0], [53.03, 2.47], [52.68, 2.32], [52.53, 1.97], [52.0, 1.75], [51.75, 1.85], [51.5, 1.75], [50.97, 1.97], [50.82, 2.32], [50.75, 2.35], [50.5, 2.25], [50.25, 2.35], [50.0, 2.25], [49.47, 2.47], [49.32, 2.82], [49.25, 2.85], [49.0, 2.75], [48.75, 2.85], [48.5, 2.75], [47.97, 2.97], [47.75, 3.5], [47.85, 3.75], [47.75, 4.0], [47.85, 4.25], [47.75, 4.5], [47.85, 4.75], [47.82, 4.82], [47.47, 4.97], [47.25, 5.5], [47.35, 5.75], [47.25, 6.0], [47.35, 6.25], [47.25, 6.5]]]]}, "2023-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.25, 6.0], [47.47, 6.53], [48.0, 6.75], [48.25, 6.65], [48.5, 6.75], [49.03, 6.53], [49.25, 6.0], [49.04, 5.5], [49.18, 5.18], [49.25, 5.15], [49.5, 5.25], [49.75, 5.15], [50.0, 5.25], [50.25, 5.15], [50.5, 5.25], [50.75, 5.15], [51.0, 5.25], [51.25, 5.15], [51.5, 5.25], [52.03, 5.03], [52.25, 4.5], [52.47, 5.03], [53.0, 5.25], [53.25, 5.15], [53.5, 5.25], [53.75, 5.15], [53.82, 5.18], [53.97, 5.53], [54.5, 5.75], [54.75, 5.65], [55.0, 5.75], [55.25, 5.65], [55.5, 5.75], [55.75, 5.65], [56.0, 5.75], [56.53, 5.53], [56.75, 5.0], [56.65, 4.75], [56.68, 4.68], [57.03, 4.53], [57.25, 4.0], [57.03, 3.47], [56.5, 3.25], [56.25, 3.35], [56.18, 3.32], [56.03, 2.97], [55.68, 2.82], [55.53, 2.47], [55.0, 2.25], [54.75, 2.35], [54.5, 2.25], [54.25, 2.35], [54.0, 2.25], [53.5, 2.46], [53.0, 2.25], [52.75, 2.35], [52.68, 2.32], [52.53, 1.97], [52.0, 1.75], [51.75, 1.85], [51.5, 1.75], [50.97, 1.97], [50.82, 2.32], [50.75, 2.35], [50.5, 2.25], [50.25, 2.35], [50.0, 2.25], [49.47, 2.47], [49.32, 2.82], [48.97, 2.97], [48.75, 3.5], [48.85, 3.75], [48.82, 3.82], [48.47, 3.97], [48.32, 4.32], [47.97, 4.47], [47.75, 5.0], [47.88, 5.3], [47.47, 5.47], [47.25, 6.0]], [[52.15, 4.25], [52.18, 4.18], [52.25, 4.15], [52.32, 4.18], [52.35, 4.25], [52.25, 4.5], [52.15, 4.25]]]]}, "2023-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.75, 5.0], [47.97, 5.53], [48.5, 5.75], [49.03, 5.53], [49.18, 5.18], [49.25, 5.15], [49.5, 5.25], [49.75, 5.15], [50.0, 5.25], [50.25, 5.15], [50.5, 5.25], [50.75, 5.15], [51.0, 5.25], [51.25, 5.15], [51.5, 5.25], [52.03, 5.03], [52.25, 4.5], [52.47, 5.03], [53.0, 5.25], [53.25, 5.15], [53.5, 5.25], [53.75, 5.15], [53.82, 5.18], [53.97, 5.53], [54.5, 5.75], [54.75, 5.65], [55.0, 5.75], [55.25, 5.65], [55.5, 5.75], [55.75, 5.65], [56.0, 5.75], [56.53, 5.53], [56.75, 5.0], [56.65, 4.75], [56.68, 4.68], [57.03, 4.53], [57.25, 4.0], [57.03, 3.47], [56.5, 3.25], [56.25, 3.35], [56.18, 3.32], [56.03, 2.97], [55.68, 2.82], [55.53, 2.47], [55.0, 2.25], [54.75, 2.35], [54.5, 2.25], [54.25, 2.35], [54.0, 2.25], [53.5, 2.46], [53.0, 2.25], [52.75, 2.35], [52.68, 2.32], [52.53, 1.97], [52.0, 1.75], [51.75, 1.85], [51.5, 1.75], [50.97, 1.97], [50.82, 2.32], [50.75, 2.35], [50.5, 2.25], [50.25, 2.35], [50.0, 2.25], [49.47, 2.47], [49.32, 2.82], [48.97, 2.97], [48.75, 3.5], [48.85, 3.75], [48.82, 3.82], [48.47, 3.97], [48.32, 4.32], [47.97, 4.47], [47.75, 5.0]], [[52.15, 4.25], [52.18, 4.18], [52.25, 4.15], [52.32, 4.18], [52.35, 4.25], [52.25, 4.5], [52.15, 4.25]]]]}, "2023-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.82, 3.68], [51.97, 4.03], [52.32, 4.18], [52.35, 4.25], [52.25, 4.5], [52.47, 5.03], [53.0, 5.25], [53.25, 5.15], [53.5, 5.25], [53.75, 5.15], [53.82, 5.18], [53.97, 5.53], [54.5, 5.75], [54.75, 5.65], [55.0, 5.75], [55.25, 5.65], [55.5, 5.75], [55.75, 5.65], [56.0, 5.75], [56.53, 5.53], [56.75, 5.0], [56.65, 4.75], [56.68, 4.68], [57.03, 4.53], [57.25, 4.0], [57.03, 3.47], [56.5, 3.25], [56.25, 3.35], [56.0, 3.25], [55.75, 3.35], [55.68, 3.32], [55.65, 3.25], [55.75, 3.0], [55.53, 2.47], [55.0, 2.25], [54.75, 2.35], [54.5, 2.25], [54.25, 2.35], [54.0, 2.25], [53.5, 2.46], [53.0, 2.25], [52.75, 2.35], [52.68, 2.32], [52.53, 1.97], [52.0, 1.75], [51.75, 1.85], [51.5, 1.75], [50.97, 1.97], [50.75, 2.5], [50.97, 3.03], [51.32, 3.18], [51.47, 3.53], [51.82, 3.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.0138880543914865}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1645435812934728}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.11079063404759, 27.216655897090448, 27.206210082059158, 27.2584453018124, 27.098268446804013, 26.976338374692432, 27.082288042705557, 27.00318086403456]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.685596805500438, 26.9482414629677, 27.049037433421915, 27.016667696019283, 26.764788372631244, 26.757119915478995, 26.798780283662325, 26.895668290375284]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6526236541754713, -1.5627330821336756, -1.2258091889786868, -1.1254644766010424, -1.1373234048501542, -1.2166231352985226, -1.08992993490788, -1.123366104794329]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0138880543914865, -1.7894624589469572, -1.621334741357316, -1.643284031513815, -1.841118917018207, -1.6191074024505383, -1.2775762380072706, -1.2879268150883831]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8464771563635256, -1.678719593839697, -1.6490621827895673, -1.524408351206126, -1.6624595938183375, -1.7801047975166648, -1.603666669927464, -1.6326714609712576]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.178560134964225, -1.8155097268121727, -1.8912006058858608, -1.6858728631156892, -1.994616439365681, -2.1736272451592824, -1.9104936430721426, -1.8509701447178033]}}