{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:14.030485", "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": "2016-Sep-23_to_2016-Sep-28_249.0_31.5"}, "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": 2016090000575}, "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": "September 23 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 28 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 321805.5233496545}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["Gulf of California", "North Pacific 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": 31.5}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 255.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.75, 25.0], [-109.65, 25.25], [-109.75, 25.5], [-109.53, 26.03], [-109.18, 26.18], [-109.15, 26.25], [-109.25, 26.5], [-109.15, 26.75], [-109.25, 27.0], [-109.15, 27.25], [-109.25, 27.5], [-109.03, 28.03], [-108.5, 28.25], [-107.97, 28.03], [-107.82, 27.68], [-107.75, 27.65], [-107.5, 27.75], [-106.97, 27.53], [-106.75, 27.0], [-106.85, 26.75], [-106.82, 26.68], [-106.47, 26.53], [-106.25, 26.0], [-106.35, 25.75], [-106.32, 25.68], [-105.97, 25.53], [-105.82, 25.18], [-105.47, 25.03], [-105.32, 24.68], [-104.97, 24.53], [-104.82, 24.18], [-104.47, 24.03], [-104.25, 23.5], [-104.35, 23.25], [-104.32, 23.18], [-103.97, 23.03], [-103.75, 22.5], [-103.85, 22.25], [-103.75, 22.0], [-103.85, 21.75], [-103.75, 21.5], [-103.97, 20.97], [-104.5, 20.75], [-104.75, 20.85], [-105.0, 20.75], [-105.53, 20.97], [-105.75, 21.5], [-105.97, 20.97], [-106.5, 20.75], [-107.03, 20.97], [-107.25, 21.5], [-107.15, 21.75], [-107.25, 22.0], [-107.15, 22.25], [-107.25, 22.5], [-107.03, 23.03], [-106.68, 23.18], [-106.65, 23.25], [-106.7, 23.38], [-107.0, 23.25], [-107.25, 23.35], [-107.32, 23.32], [-107.47, 22.97], [-108.0, 22.75], [-108.53, 22.97], [-108.68, 23.32], [-108.75, 23.35], [-109.0, 23.25], [-109.53, 23.47], [-109.75, 24.0], [-109.65, 24.25], [-109.75, 24.5], [-109.65, 24.75], [-109.75, 25.0]], [[-105.62, 21.8], [-105.8, 21.88], [-105.85, 21.75], [-105.75, 21.5], [-105.62, 21.8]]], [[[-111.53, 31.97], [-111.75, 32.5], [-111.53, 33.03], [-111.0, 33.25], [-110.47, 33.03], [-110.25, 32.5], [-110.47, 31.97], [-111.0, 31.75], [-111.53, 31.97]]]]}, "2016-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.75, 25.0], [-109.65, 25.25], [-109.75, 25.5], [-109.53, 26.03], [-109.18, 26.18], [-109.15, 26.25], [-109.25, 26.5], [-109.15, 26.75], [-109.25, 27.0], [-109.15, 27.25], [-109.18, 27.32], [-109.53, 27.47], [-109.75, 28.0], [-109.53, 28.53], [-109.0, 28.75], [-108.47, 28.53], [-108.32, 28.18], [-107.97, 28.03], [-107.82, 27.68], [-107.75, 27.65], [-107.5, 27.75], [-106.97, 27.53], [-106.82, 27.18], [-106.47, 27.03], [-106.32, 26.68], [-105.97, 26.53], [-105.82, 26.18], [-105.47, 26.03], [-105.25, 25.5], [-105.35, 25.25], [-105.32, 25.18], [-104.97, 25.03], [-104.75, 24.5], [-104.85, 24.25], [-104.82, 24.18], [-104.47, 24.03], [-104.25, 23.5], [-104.35, 23.25], [-104.32, 23.18], [-103.97, 23.03], [-103.75, 22.5], [-103.85, 22.25], [-103.75, 22.0], [-103.85, 21.75], [-103.75, 21.5], [-103.97, 20.97], [-104.5, 20.75], [-104.75, 20.85], [-105.0, 20.75], [-105.53, 20.97], [-105.75, 21.5], [-105.97, 20.97], [-106.5, 20.75], [-107.03, 20.97], [-107.25, 21.5], [-107.15, 21.75], [-107.25, 22.0], [-107.15, 22.25], [-107.25, 22.5], [-107.03, 23.03], [-106.68, 23.18], [-106.65, 23.25], [-106.68, 23.32], [-106.75, 23.35], [-107.0, 23.25], [-107.25, 23.35], [-107.32, 23.32], [-107.47, 22.97], [-108.0, 22.75], [-108.53, 22.97], [-108.68, 23.32], [-108.75, 23.35], [-109.0, 23.25], [-109.53, 23.47], [-109.75, 24.0], [-109.65, 24.25], [-109.75, 24.5], [-109.65, 24.75], [-109.75, 25.0]], [[-105.62, 21.8], [-105.8, 21.88], [-105.85, 21.75], [-105.75, 21.5], [-105.62, 21.8]]], [[[-111.0, 33.25], [-110.47, 33.03], [-110.32, 32.68], [-110.25, 32.65], [-110.0, 32.75], [-109.75, 32.65], [-109.5, 32.75], [-108.97, 32.53], [-108.75, 32.0], [-108.97, 31.47], [-109.5, 31.25], [-109.75, 31.35], [-109.82, 31.32], [-109.85, 31.25], [-109.75, 31.0], [-109.97, 30.47], [-110.5, 30.25], [-111.03, 30.47], [-111.18, 30.82], [-111.53, 30.97], [-111.75, 31.5], [-111.54, 32.0], [-111.75, 32.5], [-111.53, 33.03], [-111.0, 33.25]]]]}, "2016-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.54, 32.0], [-111.75, 32.5], [-111.53, 33.03], [-111.0, 33.25], [-110.47, 33.03], [-110.32, 32.68], [-110.25, 32.65], [-110.0, 32.75], [-109.75, 32.65], [-109.5, 32.75], [-108.97, 32.53], [-108.82, 32.18], [-108.47, 32.03], [-108.25, 31.5], [-108.37, 31.2], [-107.97, 31.03], [-107.82, 30.68], [-107.47, 30.53], [-107.25, 30.0], [-107.35, 29.75], [-107.25, 29.5], [-107.47, 28.97], [-108.0, 28.75], [-108.25, 28.85], [-108.37, 28.8], [-108.25, 28.5], [-108.35, 28.25], [-108.32, 28.18], [-108.2, 28.13], [-108.03, 28.53], [-107.5, 28.75], [-107.25, 28.65], [-107.0, 28.75], [-106.75, 28.65], [-106.68, 28.68], [-106.53, 29.03], [-106.0, 29.25], [-105.47, 29.03], [-105.25, 28.5], [-105.37, 28.2], [-104.97, 28.03], [-104.82, 27.68], [-104.47, 27.53], [-104.25, 27.0], [-104.35, 26.75], [-104.25, 26.5], [-104.35, 26.25], [-104.25, 26.0], [-104.35, 25.75], [-104.32, 25.68], [-103.97, 25.53], [-103.75, 25.0], [-103.97, 24.47], [-104.5, 24.25], [-104.8, 24.38], [-104.85, 24.25], [-104.82, 24.18], [-104.47, 24.03], [-104.25, 23.5], [-104.35, 23.25], [-104.32, 23.18], [-103.97, 23.03], [-103.75, 22.5], [-103.85, 22.25], [-103.75, 22.0], [-103.85, 21.75], [-103.75, 21.5], [-103.97, 20.97], [-104.5, 20.75], [-104.75, 20.85], [-105.0, 20.75], [-105.53, 20.97], [-105.75, 21.5], [-105.97, 20.97], [-106.5, 20.75], [-107.03, 20.97], [-107.25, 21.5], [-107.15, 21.75], [-107.25, 22.0], [-107.15, 22.25], [-107.25, 22.5], [-107.03, 23.03], [-106.68, 23.18], [-106.65, 23.25], [-106.68, 23.32], [-106.75, 23.35], [-107.0, 23.25], [-107.25, 23.35], [-107.32, 23.32], [-107.47, 22.97], [-108.0, 22.75], [-108.53, 22.97], [-108.68, 23.32], [-108.75, 23.35], [-109.0, 23.25], [-109.53, 23.47], [-109.75, 24.0], [-109.65, 24.25], [-109.75, 24.5], [-109.65, 24.75], [-109.75, 25.0], [-109.65, 25.25], [-109.75, 25.5], [-109.53, 26.03], [-109.18, 26.18], [-109.15, 26.25], [-109.25, 26.5], [-109.15, 26.75], [-109.25, 27.0], [-109.15, 27.25], [-109.18, 27.32], [-109.53, 27.47], [-109.75, 28.0], [-109.65, 28.25], [-109.68, 28.32], [-110.03, 28.47], [-110.18, 28.82], [-110.53, 28.97], [-110.68, 29.32], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.18, 30.32], [-111.53, 30.47], [-111.75, 31.0], [-111.65, 31.25], [-111.75, 31.5], [-111.54, 32.0]], [[-105.62, 21.8], [-105.8, 21.88], [-105.85, 21.75], [-105.75, 21.5], [-105.62, 21.8]], [[-109.25, 30.85], [-109.5, 30.75], [-109.75, 30.85], [-109.82, 30.82], [-109.85, 30.75], [-109.82, 30.68], [-109.5, 30.54], [-109.18, 30.68], [-109.12, 30.8], [-109.25, 30.85]]]]}, "2016-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.03], [-111.18, 32.18], [-111.03, 32.53], [-110.5, 32.75], [-110.25, 32.65], [-110.0, 32.75], [-109.75, 32.65], [-109.5, 32.75], [-108.97, 32.53], [-108.82, 32.18], [-108.75, 32.15], [-108.5, 32.25], [-108.25, 32.15], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-106.97, 32.03], [-106.82, 31.68], [-106.47, 31.53], [-106.25, 31.0], [-106.35, 30.75], [-106.25, 30.5], [-106.47, 29.97], [-107.0, 29.75], [-107.25, 29.85], [-107.32, 29.82], [-107.35, 29.75], [-107.25, 29.5], [-107.47, 28.97], [-108.0, 28.75], [-108.25, 28.85], [-108.37, 28.8], [-108.25, 28.5], [-108.35, 28.25], [-108.32, 28.18], [-108.2, 28.13], [-108.03, 28.53], [-107.5, 28.75], [-107.25, 28.65], [-107.0, 28.75], [-106.75, 28.65], [-106.68, 28.68], [-106.53, 29.03], [-106.0, 29.25], [-105.47, 29.03], [-105.25, 28.5], [-105.37, 28.2], [-104.97, 28.03], [-104.82, 27.68], [-104.47, 27.53], [-104.25, 27.0], [-104.35, 26.75], [-104.25, 26.5], [-104.35, 26.25], [-104.25, 26.0], [-104.35, 25.75], [-104.32, 25.68], [-103.97, 25.53], [-103.75, 25.0], [-103.97, 24.47], [-104.5, 24.25], [-104.8, 24.38], [-104.85, 24.25], [-104.82, 24.18], [-104.47, 24.03], [-104.25, 23.5], [-104.35, 23.25], [-104.25, 23.0], [-104.35, 22.75], [-104.25, 22.5], [-104.47, 21.97], [-105.0, 21.75], [-105.53, 21.97], [-105.75, 22.5], [-105.65, 22.75], [-105.68, 22.82], [-105.75, 22.85], [-106.0, 22.75], [-106.53, 22.97], [-106.68, 23.32], [-107.03, 23.47], [-107.18, 23.82], [-107.25, 23.85], [-107.5, 23.75], [-108.0, 23.96], [-108.5, 23.75], [-108.75, 23.85], [-109.0, 23.75], [-109.53, 23.97], [-109.75, 24.5], [-109.65, 24.75], [-109.75, 25.0], [-109.65, 25.25], [-109.75, 25.5], [-109.53, 26.03], [-109.18, 26.18], [-109.15, 26.25], [-109.25, 26.5], [-109.15, 26.75], [-109.25, 27.0], [-109.15, 27.25], [-109.18, 27.32], [-109.53, 27.47], [-109.75, 28.0], [-109.65, 28.25], [-109.68, 28.32], [-110.03, 28.47], [-110.18, 28.82], [-110.53, 28.97], [-110.68, 29.32], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.18, 30.32], [-111.53, 30.47], [-111.75, 31.0], [-111.65, 31.25], [-111.75, 31.5], [-111.53, 32.03]]]]}, "2016-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.25, 28.65], [-107.0, 28.75], [-106.75, 28.65], [-106.68, 28.68], [-106.53, 29.03], [-106.0, 29.25], [-105.47, 29.03], [-105.25, 28.5], [-105.37, 28.2], [-104.97, 28.03], [-104.82, 27.68], [-104.47, 27.53], [-104.25, 27.0], [-104.35, 26.75], [-104.25, 26.5], [-104.35, 26.25], [-104.25, 26.0], [-104.35, 25.75], [-104.32, 25.68], [-103.97, 25.53], [-103.75, 25.0], [-103.97, 24.47], [-104.5, 24.25], [-105.03, 24.47], [-105.18, 24.82], [-105.53, 24.97], [-105.68, 25.32], [-106.03, 25.47], [-106.18, 25.82], [-106.53, 25.97], [-106.68, 26.32], [-106.75, 26.35], [-107.0, 26.25], [-107.53, 26.47], [-107.75, 27.0], [-107.65, 27.25], [-107.68, 27.32], [-108.03, 27.47], [-108.25, 28.0], [-108.03, 28.53], [-107.5, 28.75], [-107.25, 28.65]]], [[[-111.18, 32.18], [-111.03, 32.53], [-110.5, 32.75], [-110.25, 32.65], [-110.0, 32.75], [-109.75, 32.65], [-109.5, 32.75], [-108.97, 32.53], [-108.82, 32.18], [-108.75, 32.15], [-108.5, 32.25], [-108.25, 32.15], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-106.97, 32.03], [-106.82, 31.68], [-106.47, 31.53], [-106.25, 31.0], [-106.35, 30.75], [-106.25, 30.5], [-106.47, 29.97], [-107.0, 29.75], [-107.25, 29.85], [-107.32, 29.82], [-107.35, 29.75], [-107.25, 29.5], [-107.47, 28.97], [-108.0, 28.75], [-108.25, 28.85], [-108.37, 28.8], [-108.25, 28.5], [-108.35, 28.25], [-108.25, 28.0], [-108.47, 27.47], [-109.0, 27.25], [-109.53, 27.47], [-109.75, 28.0], [-109.65, 28.25], [-109.68, 28.32], [-110.03, 28.47], [-110.18, 28.82], [-110.53, 28.97], [-110.68, 29.32], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.18, 30.32], [-111.53, 30.47], [-111.75, 31.0], [-111.65, 31.25], [-111.75, 31.5], [-111.53, 32.03], [-111.18, 32.18]]]]}, "2016-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.03], [-111.18, 32.18], [-111.03, 32.53], [-110.5, 32.75], [-109.97, 32.53], [-109.75, 32.0], [-109.85, 31.75], [-109.82, 31.68], [-109.75, 31.65], [-109.5, 31.75], [-109.25, 31.65], [-109.18, 31.68], [-109.03, 32.03], [-108.5, 32.25], [-108.25, 32.15], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-106.97, 32.03], [-106.82, 31.68], [-106.47, 31.53], [-106.25, 31.0], [-106.35, 30.75], [-106.25, 30.5], [-106.47, 29.97], [-107.0, 29.75], [-107.25, 29.85], [-107.5, 29.75], [-107.75, 29.85], [-108.0, 29.75], [-108.53, 29.97], [-108.68, 30.32], [-108.75, 30.35], [-109.0, 30.25], [-109.25, 30.35], [-109.32, 30.32], [-109.47, 29.97], [-110.0, 29.75], [-110.53, 29.97], [-110.68, 30.32], [-110.75, 30.35], [-111.0, 30.25], [-111.53, 30.47], [-111.75, 31.0], [-111.65, 31.25], [-111.75, 31.5], [-111.53, 32.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.444941047903512}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.20634427046829}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.198040231108905, 21.77709771711318, 19.813161639329962, 18.530905023617947, 15.607595644577373, 19.379982686965093]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.966972332021953, 12.019172565261783, 10.275851328625208, 11.12161856048209, 12.046858891526483, 18.12750999368376]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7765393125868683, -2.1858551264302473, -2.9230192662869037, -3.49337363792549, -5.59774238879339, -3.329387088785549]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5927548622759673, -6.298855293705685, -5.069278429341239, -7.280817556723605, -9.444941047903512, -4.6854387449049]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6818119300275363, -1.9138444924706186, -2.2687772714364183, -2.1607479007562054, -2.914892589853898, -1.5759964252199161]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4422091718380377, -2.8138757339809475, -3.685646107313352, -3.5203738904796675, -4.23331100547973, -1.970155140624872]}}