{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:41.293931", "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": "2020-Oct-16_to_2020-Oct-24_44.0_24.5"}, "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": 2020100000447}, "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 16 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 24 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 217623.7241331838}, "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": ["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": []}, "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": 24.5}, "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": 44.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "44.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.0, 25.25], [46.53, 25.03], [46.75, 24.5], [46.53, 23.97], [46.0, 23.75], [45.47, 23.97], [45.25, 24.5], [45.47, 25.03], [46.0, 25.25]]]]}, "2020-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.65, 22.75], [44.75, 22.5], [44.53, 21.97], [44.0, 21.75], [43.47, 21.97], [43.25, 22.5], [43.35, 22.75], [43.25, 23.0], [43.47, 23.53], [44.0, 23.75], [44.53, 23.53], [44.75, 23.0], [44.65, 22.75]]], [[[43.47, 26.03], [44.0, 26.25], [44.5, 26.04], [45.0, 26.25], [45.53, 26.03], [45.68, 25.68], [46.03, 25.53], [46.18, 25.18], [46.53, 25.03], [46.75, 24.5], [46.53, 23.97], [46.18, 23.82], [46.03, 23.47], [45.5, 23.25], [44.97, 23.47], [44.8, 23.88], [44.5, 23.75], [44.25, 23.85], [44.0, 23.75], [43.75, 23.85], [43.5, 23.75], [42.97, 23.97], [42.75, 24.5], [42.97, 25.03], [43.32, 25.18], [43.35, 25.25], [43.25, 25.5], [43.47, 26.03]]]]}, "2020-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 22.5], [41.47, 23.03], [42.0, 23.25], [42.25, 23.15], [42.38, 23.2], [42.25, 23.5], [42.35, 23.75], [42.25, 24.0], [42.35, 24.25], [42.25, 24.5], [42.35, 24.75], [42.25, 25.0], [42.35, 25.25], [42.25, 25.5], [42.47, 26.03], [43.0, 26.25], [43.5, 26.04], [43.82, 26.18], [43.97, 26.53], [44.5, 26.75], [45.03, 26.53], [45.18, 26.18], [45.53, 26.03], [45.68, 25.68], [46.03, 25.53], [46.18, 25.18], [46.53, 25.03], [46.75, 24.5], [46.53, 23.97], [46.18, 23.82], [46.03, 23.47], [45.5, 23.25], [45.25, 23.35], [45.0, 23.25], [44.75, 23.35], [44.63, 23.3], [44.68, 23.18], [45.03, 23.03], [45.25, 22.5], [45.03, 21.97], [44.68, 21.82], [44.65, 21.75], [44.75, 21.5], [44.65, 21.25], [44.68, 21.18], [45.03, 21.03], [45.25, 20.5], [45.03, 19.97], [44.5, 19.75], [43.97, 19.97], [43.82, 20.32], [43.75, 20.35], [43.5, 20.25], [42.97, 20.47], [42.82, 20.82], [42.47, 20.97], [42.32, 21.32], [41.97, 21.47], [41.82, 21.82], [41.47, 21.97], [41.25, 22.5]]]]}, "2020-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.85, 22.75], [40.75, 23.0], [40.85, 23.25], [40.75, 23.5], [40.85, 23.75], [40.75, 24.0], [40.85, 24.25], [40.75, 24.5], [40.85, 24.75], [40.75, 25.0], [40.85, 25.25], [40.75, 25.5], [40.97, 26.03], [41.32, 26.18], [41.47, 26.53], [42.0, 26.75], [42.53, 26.53], [42.68, 26.18], [42.75, 26.15], [42.82, 26.18], [42.97, 26.53], [43.5, 26.75], [44.0, 26.54], [44.5, 26.75], [45.03, 26.53], [45.18, 26.18], [45.53, 26.03], [45.68, 25.68], [46.03, 25.53], [46.18, 25.18], [46.53, 25.03], [46.75, 24.5], [46.53, 23.97], [46.18, 23.82], [46.03, 23.47], [45.5, 23.25], [45.25, 23.35], [45.0, 23.25], [44.75, 23.35], [44.63, 23.3], [44.68, 23.18], [45.03, 23.03], [45.25, 22.5], [45.03, 21.97], [44.68, 21.82], [44.65, 21.75], [44.75, 21.5], [44.65, 21.25], [44.68, 21.18], [45.03, 21.03], [45.25, 20.5], [45.03, 19.97], [44.68, 19.82], [44.53, 19.47], [44.0, 19.25], [43.47, 19.47], [43.25, 20.0], [43.38, 20.3], [42.97, 20.47], [42.82, 20.82], [42.75, 20.85], [42.5, 20.75], [42.25, 20.85], [42.0, 20.75], [41.47, 20.97], [41.32, 21.32], [40.97, 21.47], [40.75, 22.0], [40.85, 22.25], [40.75, 22.5], [40.85, 22.75]]]]}, "2020-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 26.03], [40.32, 26.18], [40.47, 26.53], [41.0, 26.75], [41.25, 26.65], [41.5, 26.75], [41.75, 26.65], [42.0, 26.75], [42.53, 26.53], [42.68, 26.18], [42.75, 26.15], [42.82, 26.18], [42.97, 26.53], [43.5, 26.75], [44.0, 26.54], [44.5, 26.75], [45.03, 26.53], [45.18, 26.18], [45.53, 26.03], [45.68, 25.68], [46.03, 25.53], [46.18, 25.18], [46.53, 25.03], [46.75, 24.5], [46.53, 23.97], [46.18, 23.82], [46.03, 23.47], [45.5, 23.25], [45.25, 23.35], [45.0, 23.25], [44.75, 23.35], [44.63, 23.3], [44.68, 23.18], [45.03, 23.03], [45.25, 22.5], [45.03, 21.97], [44.68, 21.82], [44.65, 21.75], [44.75, 21.5], [44.65, 21.25], [44.68, 21.18], [45.03, 21.03], [45.25, 20.5], [45.03, 19.97], [44.68, 19.82], [44.53, 19.47], [44.0, 19.25], [43.47, 19.47], [43.25, 20.0], [43.38, 20.3], [42.97, 20.47], [42.82, 20.82], [42.75, 20.85], [42.5, 20.75], [42.25, 20.85], [42.0, 20.75], [41.47, 20.97], [41.32, 21.32], [40.97, 21.47], [40.75, 22.0], [40.85, 22.25], [40.75, 22.5], [40.85, 22.75], [40.75, 23.0], [40.85, 23.25], [40.75, 23.5], [40.85, 23.75], [40.82, 23.82], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.75, 25.0], [39.85, 25.25], [39.75, 25.5], [39.97, 26.03]]]]}, "2020-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, 19.47], [43.25, 20.0], [43.47, 20.53], [44.0, 20.75], [44.53, 20.53], [44.75, 20.0], [44.53, 19.47], [44.0, 19.25], [43.47, 19.47]]], [[[40.32, 26.18], [40.47, 26.53], [41.0, 26.75], [41.25, 26.65], [41.5, 26.75], [41.75, 26.65], [42.0, 26.75], [42.53, 26.53], [42.68, 26.18], [42.75, 26.15], [42.82, 26.18], [42.97, 26.53], [43.5, 26.75], [44.0, 26.54], [44.5, 26.75], [45.03, 26.53], [45.18, 26.18], [45.53, 26.03], [45.75, 25.5], [45.65, 25.25], [45.75, 25.0], [45.65, 24.75], [45.75, 24.5], [45.65, 24.25], [45.75, 24.0], [45.53, 23.47], [45.0, 23.25], [44.75, 23.35], [44.63, 23.3], [44.75, 23.0], [44.65, 22.75], [44.75, 22.5], [44.53, 21.97], [44.18, 21.82], [44.03, 21.47], [43.68, 21.32], [43.53, 20.97], [43.0, 20.75], [42.75, 20.85], [42.5, 20.75], [42.25, 20.85], [42.0, 20.75], [41.47, 20.97], [41.32, 21.32], [40.97, 21.47], [40.75, 22.0], [40.85, 22.25], [40.75, 22.5], [40.85, 22.75], [40.75, 23.0], [40.85, 23.25], [40.75, 23.5], [40.85, 23.75], [40.82, 23.82], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.75, 25.0], [39.85, 25.25], [39.75, 25.5], [39.97, 26.03], [40.32, 26.18]], [[44.35, 25.25], [44.32, 25.32], [44.2, 25.38], [44.15, 25.25], [44.18, 25.18], [44.25, 25.15], [44.32, 25.18], [44.35, 25.25]]]]}, "2020-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 26.03], [40.32, 26.18], [40.47, 26.53], [41.0, 26.75], [41.25, 26.65], [41.5, 26.75], [42.03, 26.53], [42.18, 26.18], [42.25, 26.15], [42.5, 26.25], [42.8, 26.13], [42.97, 26.53], [43.5, 26.75], [44.03, 26.53], [44.25, 26.0], [44.04, 25.5], [44.18, 25.18], [44.25, 25.15], [44.5, 25.25], [45.03, 25.03], [45.25, 24.5], [45.03, 23.97], [44.68, 23.82], [44.53, 23.47], [44.0, 23.25], [43.75, 23.35], [43.5, 23.25], [43.25, 23.35], [43.0, 23.25], [42.75, 23.35], [42.5, 23.25], [42.25, 23.35], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [41.25, 23.85], [41.0, 23.75], [40.47, 23.97], [40.32, 24.32], [39.97, 24.47], [39.75, 25.0], [39.85, 25.25], [39.75, 25.5], [39.97, 26.03]]]]}, "2020-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.75, 25.5], [39.97, 26.03], [40.5, 26.25], [40.75, 26.15], [41.0, 26.25], [41.25, 26.15], [41.5, 26.25], [41.75, 26.15], [42.0, 26.25], [42.25, 26.15], [42.5, 26.25], [43.03, 26.03], [43.18, 25.68], [43.25, 25.65], [43.5, 25.75], [44.03, 25.53], [44.18, 25.18], [44.53, 25.03], [44.75, 24.5], [44.65, 24.25], [44.75, 24.0], [44.53, 23.47], [44.0, 23.25], [43.5, 23.46], [43.0, 23.25], [42.75, 23.35], [42.5, 23.25], [42.25, 23.35], [42.0, 23.25], [41.47, 23.47], [41.32, 23.82], [40.97, 23.97], [40.82, 24.32], [40.47, 24.47], [40.32, 24.82], [39.97, 24.97], [39.75, 25.5]]]]}, "2020-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 24.97], [39.75, 25.5], [39.97, 26.03], [40.5, 26.25], [40.75, 26.15], [41.0, 26.25], [41.25, 26.15], [41.5, 26.25], [41.75, 26.15], [42.0, 26.25], [42.25, 26.15], [42.5, 26.25], [43.03, 26.03], [43.18, 25.68], [43.25, 25.65], [43.5, 25.75], [44.03, 25.53], [44.18, 25.18], [44.53, 25.03], [44.75, 24.5], [44.65, 24.25], [44.75, 24.0], [44.53, 23.47], [44.0, 23.25], [43.47, 23.47], [43.3, 23.88], [43.18, 23.82], [43.03, 23.47], [42.5, 23.25], [42.25, 23.35], [42.0, 23.25], [41.47, 23.47], [41.25, 24.0], [41.35, 24.25], [41.32, 24.32], [40.97, 24.47], [40.82, 24.82], [40.75, 24.85], [40.5, 24.75], [39.97, 24.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.7870383195576096}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.631008662905566}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.64956097087901, 24.158492993683126, 23.95146658166658, 23.77672596549445, 23.528964181884874, 23.50714105845549, 23.14770724768647, 22.884802248487688, 22.44220164567963]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.64956097087901, 23.661568983645395, 23.002739559461872, 22.477837297613803, 22.444625666717286, 22.464869632621685, 22.39772594499584, 22.175906831047143, 21.536817074685075]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.438327016096707, -2.5480975931945573, -2.5332541108470634, -2.639810062462108, -2.690526944249871, -2.502035560739887, -2.6754994535137206, -2.716692734609583, -2.940349525799698]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.438327016096707, -2.9974774065451584, -3.430006874441858, -3.691938819833183, -3.7870383195576096, -3.5235376051379035, -3.3230352616187133, -3.2604164299364697, -3.6325953337534997]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6645219865675, -1.6876815842521318, -1.821208443137416, -1.9369141094391678, -1.9428192741289323, -1.7643835017149023, -1.7987204085884692, -1.805026188403085, -1.8478315675176062]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6645219865675, -1.8005955668912357, -2.140788596088558, -2.484129439708313, -2.4758352089616285, -2.1263350625827506, -2.2191026372817775, -2.0231939637215373, -2.140041353958762]}}