{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:17.288198", "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-Oct-18_to_2021-Oct-27_52.0_14.5"}, "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": 2021100000630}, "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": "October 18 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 110612.37590541465}, "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": ["Yemen"]}, "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": ["Arabian 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": 14.5}, "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": 52.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "52.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 51.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 55.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[51.32, 15.68], [51.47, 16.03], [51.82, 16.18], [51.97, 16.53], [52.32, 16.68], [52.47, 17.03], [53.0, 17.25], [53.25, 17.15], [53.5, 17.25], [53.75, 17.15], [53.82, 17.18], [53.97, 17.53], [54.5, 17.75], [54.75, 17.65], [55.0, 17.75], [55.53, 17.53], [55.75, 17.0], [55.53, 16.47], [55.0, 16.25], [54.75, 16.35], [54.68, 16.32], [54.53, 15.97], [54.18, 15.82], [54.15, 15.75], [54.25, 15.5], [54.15, 15.25], [54.18, 15.18], [54.53, 15.03], [54.75, 14.5], [54.65, 14.25], [54.75, 14.0], [54.54, 13.5], [54.68, 13.18], [55.03, 13.03], [55.25, 12.5], [55.03, 11.97], [54.5, 11.75], [54.0, 11.96], [53.5, 11.75], [53.25, 11.85], [53.0, 11.75], [52.47, 11.97], [52.25, 12.5], [52.35, 12.75], [52.32, 12.82], [51.97, 12.97], [51.82, 13.32], [51.75, 13.35], [51.5, 13.25], [50.97, 13.47], [50.75, 14.0], [50.85, 14.25], [50.75, 14.5], [50.85, 14.75], [50.75, 15.0], [50.97, 15.53], [51.32, 15.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "Arabian-Peninsula", "Arabian-Sea"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, 14.97], [52.25, 15.5], [52.47, 16.03], [53.0, 16.25], [53.53, 16.03], [53.75, 15.5], [53.63, 15.2], [53.75, 15.15], [54.0, 15.25], [54.53, 15.03], [54.75, 14.5], [54.65, 14.25], [54.75, 14.0], [54.54, 13.5], [54.75, 13.0], [54.53, 12.47], [54.0, 12.25], [53.47, 12.47], [53.25, 13.0], [53.46, 13.5], [53.32, 13.82], [52.97, 13.97], [52.75, 14.5], [52.88, 14.8], [52.47, 14.97]]]]}, "2021-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.47, 15.53], [51.82, 15.68], [51.97, 16.03], [52.5, 16.25], [52.75, 16.15], [52.88, 16.2], [52.75, 16.5], [52.97, 17.03], [53.5, 17.25], [53.8, 17.13], [53.97, 17.53], [54.5, 17.75], [55.03, 17.53], [55.25, 17.0], [55.03, 16.47], [54.5, 16.25], [54.2, 16.38], [54.03, 15.97], [53.63, 15.8], [53.68, 15.68], [54.03, 15.53], [54.18, 15.18], [54.53, 15.03], [54.75, 14.5], [54.65, 14.25], [54.75, 14.0], [54.54, 13.5], [54.75, 13.0], [54.53, 12.47], [54.0, 12.25], [53.75, 12.35], [53.5, 12.25], [53.25, 12.35], [53.0, 12.25], [52.47, 12.47], [52.32, 12.82], [51.97, 12.97], [51.75, 13.5], [51.85, 13.75], [51.82, 13.82], [51.75, 13.85], [51.5, 13.75], [50.97, 13.97], [50.75, 14.5], [50.97, 15.03], [51.32, 15.18], [51.47, 15.53]]]]}, "2021-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 14.5], [50.85, 14.75], [50.75, 15.0], [50.97, 15.53], [51.32, 15.68], [51.47, 16.03], [52.0, 16.25], [52.25, 16.15], [52.32, 16.18], [52.35, 16.25], [52.25, 16.5], [52.47, 17.03], [53.0, 17.25], [53.25, 17.15], [53.5, 17.25], [53.75, 17.15], [53.82, 17.18], [53.97, 17.53], [54.5, 17.75], [54.75, 17.65], [55.0, 17.75], [55.53, 17.53], [55.75, 17.0], [55.53, 16.47], [55.0, 16.25], [54.75, 16.35], [54.68, 16.32], [54.53, 15.97], [54.18, 15.82], [54.15, 15.75], [54.25, 15.5], [54.15, 15.25], [54.18, 15.18], [54.53, 15.03], [54.75, 14.5], [54.65, 14.25], [54.75, 14.0], [54.54, 13.5], [54.68, 13.18], [55.03, 13.03], [55.25, 12.5], [55.03, 11.97], [54.5, 11.75], [54.0, 11.96], [53.5, 11.75], [53.25, 11.85], [53.0, 11.75], [52.47, 11.97], [52.25, 12.5], [52.35, 12.75], [52.32, 12.82], [51.97, 12.97], [51.82, 13.32], [51.75, 13.35], [51.5, 13.25], [50.97, 13.47], [50.75, 14.0], [50.85, 14.25], [50.75, 14.5]]]]}, "2021-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 14.5], [50.85, 14.75], [50.75, 15.0], [50.97, 15.53], [51.32, 15.68], [51.47, 16.03], [51.82, 16.18], [51.97, 16.53], [52.32, 16.68], [52.47, 17.03], [53.0, 17.25], [53.25, 17.15], [53.5, 17.25], [53.75, 17.15], [53.82, 17.18], [53.97, 17.53], [54.5, 17.75], [54.75, 17.65], [55.0, 17.75], [55.53, 17.53], [55.75, 17.0], [55.53, 16.47], [55.0, 16.25], [54.75, 16.35], [54.68, 16.32], [54.53, 15.97], [54.18, 15.82], [54.15, 15.75], [54.25, 15.5], [54.15, 15.25], [54.25, 15.0], [54.15, 14.75], [54.25, 14.5], [54.15, 14.25], [54.25, 14.0], [54.04, 13.5], [54.2, 13.13], [54.5, 13.25], [55.03, 13.03], [55.25, 12.5], [55.03, 11.97], [54.5, 11.75], [54.0, 11.96], [53.5, 11.75], [53.25, 11.85], [53.0, 11.75], [52.47, 11.97], [52.25, 12.5], [52.35, 12.75], [52.32, 12.82], [51.97, 12.97], [51.82, 13.32], [51.75, 13.35], [51.5, 13.25], [50.97, 13.47], [50.75, 14.0], [50.85, 14.25], [50.75, 14.5]]]]}, "2021-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 14.5], [50.85, 14.75], [50.75, 15.0], [50.97, 15.53], [51.32, 15.68], [51.47, 16.03], [51.82, 16.18], [51.97, 16.53], [52.32, 16.68], [52.47, 17.03], [53.0, 17.25], [53.25, 17.15], [53.5, 17.25], [53.75, 17.15], [53.82, 17.18], [53.97, 17.53], [54.5, 17.75], [54.75, 17.65], [55.0, 17.75], [55.53, 17.53], [55.75, 17.0], [55.53, 16.47], [55.0, 16.25], [54.75, 16.35], [54.68, 16.32], [54.53, 15.97], [54.18, 15.82], [54.15, 15.75], [54.25, 15.5], [54.03, 14.97], [53.68, 14.82], [53.65, 14.75], [53.75, 14.5], [53.53, 13.97], [53.18, 13.82], [53.15, 13.75], [53.25, 13.5], [53.13, 13.2], [53.25, 13.15], [53.5, 13.25], [54.0, 13.04], [54.5, 13.25], [55.03, 13.03], [55.25, 12.5], [55.03, 11.97], [54.5, 11.75], [54.0, 11.96], [53.5, 11.75], [53.25, 11.85], [53.0, 11.75], [52.47, 11.97], [52.25, 12.5], [52.38, 12.8], [51.97, 12.97], [51.82, 13.32], [51.75, 13.35], [51.5, 13.25], [50.97, 13.47], [50.75, 14.0], [50.85, 14.25], [50.75, 14.5]]]]}, "2021-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, 11.97], [52.25, 12.5], [52.47, 13.03], [53.0, 13.25], [53.25, 13.15], [53.5, 13.25], [54.03, 13.03], [54.25, 12.5], [54.03, 11.97], [53.5, 11.75], [53.25, 11.85], [53.0, 11.75], [52.47, 11.97]]], [[[50.97, 15.53], [51.32, 15.68], [51.47, 16.03], [51.82, 16.18], [51.97, 16.53], [52.32, 16.68], [52.47, 17.03], [53.0, 17.25], [53.25, 17.15], [53.5, 17.25], [53.75, 17.15], [53.82, 17.18], [53.97, 17.53], [54.5, 17.75], [54.75, 17.65], [55.0, 17.75], [55.53, 17.53], [55.75, 17.0], [55.53, 16.47], [55.0, 16.25], [54.75, 16.35], [54.68, 16.32], [54.53, 15.97], [54.0, 15.75], [53.75, 15.85], [53.68, 15.82], [53.65, 15.75], [53.75, 15.5], [53.53, 14.97], [53.18, 14.82], [53.03, 14.47], [52.68, 14.32], [52.53, 13.97], [52.0, 13.75], [51.75, 13.85], [51.5, 13.75], [50.97, 13.97], [50.75, 14.5], [50.85, 14.75], [50.75, 15.0], [50.97, 15.53]]]]}, "2021-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.25, 15.0], [51.47, 15.53], [51.82, 15.68], [51.97, 16.03], [52.5, 16.25], [53.03, 16.03], [53.25, 15.5], [53.15, 15.25], [53.25, 15.0], [53.03, 14.47], [52.68, 14.32], [52.53, 13.97], [52.0, 13.75], [51.47, 13.97], [51.25, 14.5], [51.35, 14.75], [51.25, 15.0]]]]}, "2021-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.25, 15.0], [51.47, 15.53], [51.82, 15.68], [51.97, 16.03], [52.5, 16.25], [53.03, 16.03], [53.25, 15.5], [53.15, 15.25], [53.25, 15.0], [53.03, 14.47], [52.68, 14.32], [52.53, 13.97], [52.0, 13.75], [51.47, 13.97], [51.25, 14.5], [51.35, 14.75], [51.25, 15.0]]]]}, "2021-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.25, 15.0], [51.47, 15.53], [51.82, 15.68], [51.97, 16.03], [52.5, 16.25], [53.03, 16.03], [53.25, 15.5], [53.15, 15.25], [53.25, 15.0], [53.03, 14.47], [52.68, 14.32], [52.53, 13.97], [52.0, 13.75], [51.47, 13.97], [51.25, 14.5], [51.35, 14.75], [51.25, 15.0]]]]}, "2021-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.47, 15.03], [52.0, 15.25], [52.53, 15.03], [52.75, 14.5], [52.53, 13.97], [52.0, 13.75], [51.47, 13.97], [51.25, 14.5], [51.47, 15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.302952452177067}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1723403325998583}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.609151046259967, 25.366877121822142, 25.435007454793038, 25.41876617108136, 25.421125279195678, 25.5956057196222, 25.910008067153456, 25.802855111461213, 25.595160324606184, 25.911025163234854]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.28999382994533, 23.999487253708878, 23.782130054080028, 23.3208204758036, 23.48626810505317, 23.939742276479762, 25.777446544537554, 25.718002929110355, 25.47646144487817, 25.911025163234854]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.973231572165821, -1.1795147507229617, -1.174326728140694, -1.2247344318471658, -1.2662863189894058, -1.1131042823044748, -0.8742427079957338, -0.9519223531920744, -1.1572487672782046, -0.7548628038981064]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.079211981342496, -1.5675582840356697, -1.817717351407623, -2.302952452177067, -2.133975367133189, -1.6445494410928063, -0.9269128471023578, -1.0188338923077254, -1.195973178548627, -0.7548628038981064]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.471330096514564, -1.7954184309723928, -1.7439986398858192, -1.7807192488097223, -1.777802858598758, -1.5131744272203709, -1.3433702123172804, -1.511870434791717, -1.8137656291587434, -1.2149811615844837]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6861541714616939, -2.293888778597811, -2.11396876137973, -2.5242694943741455, -2.3233603093482076, -1.818489789297433, -1.4178151079047574, -1.6017399480658927, -1.968863986326749, -1.2149811615844837]}}