{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:30.419576", "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": "2019-Apr-13_to_2019-Apr-20_58.0_22.5"}, "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": 2019040000425}, "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 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2019"}, "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": 170091.37618966043}, "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": ["Oman", "Saudi Arabia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "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": 22.5}, "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": 58.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "58.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 60.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.85, 23.25], [55.75, 23.5], [55.85, 23.75], [55.75, 24.0], [55.97, 24.53], [56.5, 24.75], [57.03, 24.53], [57.18, 24.18], [57.53, 24.03], [57.68, 23.68], [57.75, 23.65], [58.0, 23.75], [58.25, 23.65], [58.5, 23.75], [59.03, 23.53], [59.25, 23.0], [59.15, 22.75], [59.25, 22.5], [59.03, 21.97], [58.68, 21.82], [58.53, 21.47], [58.0, 21.25], [57.75, 21.35], [57.5, 21.25], [57.25, 21.35], [57.0, 21.25], [56.47, 21.47], [56.32, 21.82], [55.97, 21.97], [55.75, 22.5], [55.85, 22.75], [55.75, 23.0], [55.85, 23.25]]]]}, "2019-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, 20.03], [52.5, 20.25], [53.0, 20.04], [53.32, 20.18], [53.35, 20.25], [53.25, 20.5], [53.47, 21.03], [54.0, 21.25], [54.25, 21.15], [54.32, 21.18], [54.47, 21.53], [54.82, 21.68], [54.97, 22.03], [55.32, 22.18], [55.47, 22.53], [55.82, 22.68], [55.85, 22.75], [55.82, 22.82], [55.75, 22.85], [55.5, 22.75], [54.97, 22.97], [54.75, 23.5], [54.97, 24.03], [55.5, 24.25], [55.75, 24.15], [55.82, 24.18], [55.97, 24.53], [56.5, 24.75], [57.03, 24.53], [57.18, 24.18], [57.53, 24.03], [57.68, 23.68], [57.75, 23.65], [58.0, 23.75], [58.25, 23.65], [58.5, 23.75], [59.03, 23.53], [59.18, 23.18], [59.53, 23.03], [59.68, 22.68], [59.75, 22.65], [60.0, 22.75], [60.53, 22.53], [60.75, 22.0], [60.53, 21.47], [60.0, 21.25], [59.75, 21.35], [59.5, 21.25], [59.25, 21.35], [59.18, 21.32], [59.03, 20.97], [58.5, 20.75], [58.25, 20.85], [58.0, 20.75], [57.5, 20.96], [57.13, 20.8], [57.25, 20.5], [57.15, 20.25], [57.25, 20.0], [57.03, 19.47], [56.5, 19.25], [56.25, 19.35], [56.18, 19.32], [56.03, 18.97], [55.5, 18.75], [55.25, 18.85], [55.0, 18.75], [54.75, 18.85], [54.5, 18.75], [54.25, 18.85], [54.18, 18.82], [54.03, 18.47], [53.68, 18.32], [53.53, 17.97], [53.0, 17.75], [52.47, 17.97], [52.32, 18.32], [51.97, 18.47], [51.75, 19.0], [51.85, 19.25], [51.75, 19.5], [51.97, 20.03]]]]}, "2019-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, 20.03], [52.5, 20.25], [53.0, 20.04], [53.32, 20.18], [53.35, 20.25], [53.25, 20.5], [53.47, 21.03], [54.0, 21.25], [54.25, 21.15], [54.32, 21.18], [54.47, 21.53], [54.82, 21.68], [54.97, 22.03], [55.32, 22.18], [55.47, 22.53], [55.82, 22.68], [55.85, 22.75], [55.82, 22.82], [55.75, 22.85], [55.5, 22.75], [54.97, 22.97], [54.75, 23.5], [54.97, 24.03], [55.5, 24.25], [55.75, 24.15], [55.82, 24.18], [55.97, 24.53], [56.5, 24.75], [57.03, 24.53], [57.18, 24.18], [57.53, 24.03], [57.68, 23.68], [57.75, 23.65], [58.0, 23.75], [58.25, 23.65], [58.5, 23.75], [59.03, 23.53], [59.18, 23.18], [59.53, 23.03], [59.68, 22.68], [59.75, 22.65], [60.0, 22.75], [60.53, 22.53], [60.75, 22.0], [60.53, 21.47], [60.0, 21.25], [59.75, 21.35], [59.5, 21.25], [59.25, 21.35], [59.18, 21.32], [59.03, 20.97], [58.5, 20.75], [58.25, 20.85], [58.0, 20.75], [57.5, 20.96], [57.13, 20.8], [57.25, 20.5], [57.15, 20.25], [57.25, 20.0], [57.03, 19.47], [56.5, 19.25], [56.25, 19.35], [56.18, 19.32], [56.15, 19.25], [56.25, 19.0], [56.03, 18.47], [55.5, 18.25], [54.97, 18.47], [54.82, 18.82], [54.75, 18.85], [54.5, 18.75], [54.25, 18.85], [54.18, 18.82], [54.03, 18.47], [53.68, 18.32], [53.53, 17.97], [53.0, 17.75], [52.47, 17.97], [52.32, 18.32], [51.97, 18.47], [51.75, 19.0], [51.85, 19.25], [51.75, 19.5], [51.97, 20.03]]]]}, "2019-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, 20.03], [52.5, 20.25], [53.0, 20.04], [53.32, 20.18], [53.35, 20.25], [53.25, 20.5], [53.47, 21.03], [54.0, 21.25], [54.25, 21.15], [54.32, 21.18], [54.47, 21.53], [54.82, 21.68], [54.97, 22.03], [55.32, 22.18], [55.47, 22.53], [56.0, 22.75], [55.75, 22.85], [55.5, 22.75], [54.97, 22.97], [54.75, 23.5], [54.97, 24.03], [55.5, 24.25], [55.75, 24.15], [56.0, 24.25], [56.25, 24.15], [56.5, 24.25], [57.03, 24.03], [57.18, 23.68], [57.25, 23.65], [57.5, 23.75], [58.03, 23.53], [58.18, 23.18], [58.25, 23.15], [58.5, 23.25], [58.75, 23.15], [59.0, 23.25], [59.53, 23.03], [59.68, 22.68], [59.75, 22.65], [60.0, 22.75], [60.53, 22.53], [60.75, 22.0], [60.53, 21.47], [60.0, 21.25], [59.75, 21.35], [59.5, 21.25], [59.25, 21.35], [59.18, 21.32], [59.03, 20.97], [58.5, 20.75], [58.25, 20.85], [58.0, 20.75], [57.5, 20.96], [57.13, 20.8], [57.25, 20.5], [57.15, 20.25], [57.25, 20.0], [57.03, 19.47], [56.5, 19.25], [56.25, 19.35], [56.18, 19.32], [56.15, 19.25], [56.25, 19.0], [56.03, 18.47], [55.5, 18.25], [54.97, 18.47], [54.82, 18.82], [54.75, 18.85], [54.5, 18.75], [54.25, 18.85], [54.18, 18.82], [54.03, 18.47], [53.68, 18.32], [53.53, 17.97], [53.0, 17.75], [52.47, 17.97], [52.32, 18.32], [51.97, 18.47], [51.75, 19.0], [51.85, 19.25], [51.75, 19.5], [51.97, 20.03]], [[56.3, 22.63], [56.35, 22.75], [56.32, 22.82], [56.25, 22.85], [56.0, 22.75], [56.3, 22.63]]]]}, "2019-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, 20.53], [54.0, 20.75], [54.25, 20.65], [54.5, 20.75], [54.75, 20.65], [54.82, 20.68], [54.97, 21.03], [55.5, 21.25], [56.03, 21.03], [56.18, 20.68], [56.53, 20.53], [56.75, 20.0], [56.53, 19.47], [56.18, 19.32], [56.15, 19.25], [56.18, 19.18], [56.53, 19.03], [56.75, 18.5], [56.53, 17.97], [56.0, 17.75], [55.47, 17.97], [55.32, 18.32], [54.97, 18.47], [54.82, 18.82], [54.75, 18.85], [54.5, 18.75], [53.97, 18.97], [53.82, 19.32], [53.47, 19.47], [53.25, 20.0], [53.47, 20.53]]], [[[55.25, 22.0], [55.47, 22.53], [56.0, 22.75], [56.53, 22.53], [56.75, 22.0], [56.53, 21.47], [56.0, 21.25], [55.47, 21.47], [55.25, 22.0]]], [[[58.53, 23.03], [58.68, 22.68], [58.75, 22.65], [59.0, 22.75], [59.53, 22.53], [59.75, 22.0], [59.53, 21.47], [59.18, 21.32], [59.03, 20.97], [58.5, 20.75], [57.97, 20.97], [57.82, 21.32], [57.47, 21.47], [57.25, 22.0], [57.35, 22.25], [57.25, 22.5], [57.47, 23.03], [58.0, 23.25], [58.53, 23.03]]]]}, "2019-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, 19.53], [55.0, 19.75], [55.25, 19.65], [55.5, 19.75], [56.03, 19.53], [56.18, 19.18], [56.53, 19.03], [56.75, 18.5], [56.53, 17.97], [56.0, 17.75], [55.75, 17.85], [55.5, 17.75], [55.25, 17.85], [55.0, 17.75], [54.47, 17.97], [54.25, 18.5], [54.35, 18.75], [54.25, 19.0], [54.47, 19.53]]]]}, "2019-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, 19.53], [55.0, 19.75], [55.25, 19.65], [55.5, 19.75], [56.03, 19.53], [56.18, 19.18], [56.53, 19.03], [56.75, 18.5], [56.53, 17.97], [56.0, 17.75], [55.75, 17.85], [55.5, 17.75], [55.25, 17.85], [55.0, 17.75], [54.47, 17.97], [54.25, 18.5], [54.35, 18.75], [54.25, 19.0], [54.47, 19.53]]]]}, "2019-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, 19.53], [55.0, 19.75], [55.25, 19.65], [55.5, 19.75], [56.03, 19.53], [56.18, 19.18], [56.53, 19.03], [56.75, 18.5], [56.53, 17.97], [56.0, 17.75], [55.75, 17.85], [55.5, 17.75], [55.25, 17.85], [55.0, 17.75], [54.47, 17.97], [54.25, 18.5], [54.35, 18.75], [54.25, 19.0], [54.47, 19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.904195095335751}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.313859220396311}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.4968055436608, 24.22918683824571, 24.98566138266375, 26.074995197568512, 27.090259691579206, 26.768641709235794, 26.856074140645717, 27.116242671875796]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.548669796205274, 19.884941965373457, 22.095103348965324, 24.03365601455846, 26.055215122302627, 26.38785348457708, 26.48380096798627, 26.42797836989746]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.554770305075824, -5.363412388769878, -4.685490081075374, -3.812961059236495, -2.8307222927847553, -2.196022210895387, -2.2566814181603947, -2.146132776268155]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.7568988942934425, -7.904195095335751, -6.438659558659651, -5.658066280835897, -4.058326224421819, -2.5778515335841803, -2.422953973845381, -2.190055812016851]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8414198826888768, -2.3159013730320446, -2.0843316458528287, -1.7788862747912215, -1.42558472438915, -1.4538908700789652, -1.505050502281387, -1.4432763634115653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4065416858634694, -3.329240129675698, -2.627923740799894, -2.340004277263253, -1.6915276795685077, -1.6714977625259835, -1.554696390975404, -1.5489535931633793]}}