{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:37:15.238628", "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-Dec-22_to_2024-Jan-02_261.5_17.0"}, "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": 2023120000381}, "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": "December 22 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 12}, "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": 131764.2752615959}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America", "S.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": ["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": 17.0}, "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": 261.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.53, 16.47], [-98.75, 17.0], [-98.53, 17.53], [-98.0, 17.75]]]]}, "2023-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.53, 16.47], [-98.75, 17.0], [-98.53, 17.53], [-98.0, 17.75]]]]}, "2023-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 16.47], [-99.25, 17.0], [-99.03, 17.53], [-98.5, 17.75], [-98.25, 17.65], [-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.25, 16.35], [-98.5, 16.25], [-99.03, 16.47]]]]}, "2023-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 16.47], [-99.25, 17.0], [-99.03, 17.53], [-98.5, 17.75], [-98.25, 17.65], [-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.25, 16.35], [-98.5, 16.25], [-99.03, 16.47]]]]}, "2023-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.25, 17.0], [-99.03, 17.53], [-98.5, 17.75], [-98.25, 17.65], [-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.25, 16.35], [-98.5, 16.25], [-99.03, 16.47], [-99.25, 17.0]]], [[[-103.75, 19.5], [-103.53, 20.03], [-103.0, 20.25], [-102.75, 20.15], [-102.5, 20.25], [-102.25, 20.15], [-102.0, 20.25], [-101.75, 20.15], [-101.5, 20.25], [-101.25, 20.15], [-101.0, 20.25], [-100.47, 20.03], [-100.25, 19.5], [-100.47, 18.97], [-101.0, 18.75], [-100.47, 18.53], [-100.25, 18.0], [-100.47, 17.47], [-101.0, 17.25], [-101.53, 17.47], [-101.7, 17.88], [-102.0, 17.75], [-102.25, 17.85], [-102.5, 17.75], [-102.75, 17.85], [-103.0, 17.75], [-103.53, 17.97], [-103.75, 18.5], [-103.65, 18.75], [-103.75, 19.0], [-103.65, 19.25], [-103.75, 19.5]], [[-101.25, 18.85], [-101.32, 18.82], [-101.35, 18.75], [-101.3, 18.62], [-101.0, 18.75], [-101.25, 18.85]]]]}, "2023-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.53, 16.47], [-98.75, 17.0], [-98.53, 17.53], [-98.0, 17.75], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.53, 16.47]]], [[[-103.75, 19.5], [-103.53, 20.03], [-103.0, 20.25], [-102.75, 20.15], [-102.5, 20.25], [-102.25, 20.15], [-102.0, 20.25], [-101.75, 20.15], [-101.5, 20.25], [-101.25, 20.15], [-101.0, 20.25], [-100.75, 20.15], [-100.5, 20.25], [-99.97, 20.03], [-99.75, 19.5], [-99.87, 19.2], [-99.75, 19.15], [-99.5, 19.25], [-98.97, 19.03], [-98.75, 18.5], [-98.85, 18.25], [-98.75, 18.0], [-98.85, 17.75], [-98.75, 17.5], [-98.97, 16.97], [-99.5, 16.75], [-99.75, 16.85], [-100.0, 16.75], [-100.53, 16.97], [-100.7, 17.38], [-101.0, 17.25], [-101.53, 17.47], [-101.68, 17.82], [-101.75, 17.85], [-102.0, 17.75], [-102.25, 17.85], [-102.5, 17.75], [-102.75, 17.85], [-103.0, 17.75], [-103.53, 17.97], [-103.75, 18.5], [-103.65, 18.75], [-103.75, 19.0], [-103.65, 19.25], [-103.75, 19.5]]]]}, "2023-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 19.5], [-103.53, 20.03], [-103.0, 20.25], [-102.75, 20.15], [-102.68, 20.18], [-102.53, 20.53], [-102.0, 20.75], [-101.75, 20.65], [-101.5, 20.75], [-101.0, 20.54], [-100.5, 20.75], [-100.25, 20.65], [-100.0, 20.75], [-99.47, 20.53], [-99.32, 20.18], [-98.97, 20.03], [-98.82, 19.68], [-98.47, 19.53], [-98.25, 19.0], [-98.47, 18.47], [-98.82, 18.32], [-98.85, 18.25], [-98.82, 18.18], [-98.75, 18.15], [-98.5, 18.25], [-97.97, 18.03], [-97.82, 17.68], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.25, 16.35], [-98.5, 16.25], [-98.75, 16.35], [-99.0, 16.25], [-99.25, 16.35], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97], [-101.68, 17.32], [-102.0, 17.46], [-102.5, 17.25], [-103.03, 17.47], [-103.18, 17.82], [-103.25, 17.85], [-103.5, 17.75], [-104.03, 17.97], [-104.25, 18.5], [-104.03, 19.03], [-103.68, 19.18], [-103.65, 19.25], [-103.75, 19.5]]]]}, "2023-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 19.5], [-103.53, 20.03], [-103.0, 20.25], [-102.75, 20.15], [-102.68, 20.18], [-102.53, 20.53], [-102.0, 20.75], [-101.75, 20.65], [-101.5, 20.75], [-101.0, 20.54], [-100.5, 20.75], [-100.25, 20.65], [-100.0, 20.75], [-99.47, 20.53], [-99.32, 20.18], [-98.97, 20.03], [-98.82, 19.68], [-98.47, 19.53], [-98.25, 19.0], [-98.47, 18.47], [-98.82, 18.32], [-98.85, 18.25], [-98.82, 18.18], [-98.75, 18.15], [-98.5, 18.25], [-97.97, 18.03], [-97.82, 17.68], [-97.47, 17.53], [-97.25, 17.0], [-97.47, 16.47], [-98.0, 16.25], [-98.25, 16.35], [-98.5, 16.25], [-98.75, 16.35], [-99.0, 16.25], [-99.25, 16.35], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97], [-101.68, 17.32], [-102.0, 17.46], [-102.5, 17.25], [-103.03, 17.47], [-103.18, 17.82], [-103.25, 17.85], [-103.5, 17.75], [-104.03, 17.97], [-104.25, 18.5], [-104.03, 19.03], [-103.68, 19.18], [-103.65, 19.25], [-103.75, 19.5]]]]}, "2023-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 19.5], [-103.53, 20.03], [-103.18, 20.18], [-103.03, 20.53], [-102.5, 20.75], [-102.25, 20.65], [-102.0, 20.75], [-101.75, 20.65], [-101.5, 20.75], [-101.25, 20.65], [-101.0, 20.75], [-100.75, 20.65], [-100.5, 20.75], [-100.25, 20.65], [-100.0, 20.75], [-99.47, 20.53], [-99.32, 20.18], [-98.97, 20.03], [-98.82, 19.68], [-98.47, 19.53], [-98.25, 19.0], [-98.47, 18.47], [-98.82, 18.32], [-98.85, 18.25], [-98.82, 18.18], [-98.75, 18.15], [-98.5, 18.25], [-97.97, 18.03], [-97.75, 17.5], [-97.85, 17.25], [-97.75, 17.0], [-97.97, 16.47], [-98.5, 16.25], [-98.75, 16.35], [-99.0, 16.25], [-99.25, 16.35], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97], [-101.68, 17.32], [-102.0, 17.46], [-102.5, 17.25], [-103.03, 17.47], [-103.18, 17.82], [-103.25, 17.85], [-103.5, 17.75], [-104.03, 17.97], [-104.25, 18.5], [-104.03, 19.03], [-103.68, 19.18], [-103.65, 19.25], [-103.75, 19.5]]]]}, "2023-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.65, 19.25], [-103.75, 19.5], [-103.53, 20.03], [-103.18, 20.18], [-103.03, 20.53], [-102.5, 20.75], [-102.25, 20.65], [-102.0, 20.75], [-101.75, 20.65], [-101.5, 20.75], [-101.25, 20.65], [-101.0, 20.75], [-100.75, 20.65], [-100.5, 20.75], [-100.25, 20.65], [-100.0, 20.75], [-99.47, 20.53], [-99.25, 20.0], [-99.35, 19.75], [-99.32, 19.68], [-99.25, 19.65], [-99.0, 19.75], [-98.47, 19.53], [-98.25, 19.0], [-98.47, 18.47], [-98.82, 18.32], [-98.85, 18.25], [-98.82, 18.18], [-98.75, 18.15], [-98.5, 18.25], [-97.97, 18.03], [-97.75, 17.5], [-97.85, 17.25], [-97.75, 17.0], [-97.97, 16.47], [-98.5, 16.25], [-99.0, 16.46], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97], [-101.68, 17.32], [-102.03, 17.47], [-102.18, 17.82], [-102.25, 17.85], [-102.5, 17.75], [-102.75, 17.85], [-103.0, 17.75], [-103.53, 17.97], [-103.75, 18.5], [-103.65, 18.75], [-103.75, 19.0], [-103.65, 19.25]]]]}, "2024-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.65, 19.25], [-103.75, 19.5], [-103.53, 20.03], [-103.18, 20.18], [-103.03, 20.53], [-102.5, 20.75], [-101.97, 20.53], [-101.82, 20.18], [-101.7, 20.12], [-101.53, 20.53], [-101.0, 20.75], [-100.75, 20.65], [-100.5, 20.75], [-99.97, 20.53], [-99.75, 20.0], [-99.85, 19.75], [-99.82, 19.68], [-99.75, 19.65], [-99.5, 19.75], [-99.25, 19.65], [-99.0, 19.75], [-98.47, 19.53], [-98.25, 19.0], [-98.47, 18.47], [-98.82, 18.32], [-98.87, 18.2], [-98.47, 18.03], [-98.32, 17.68], [-97.97, 17.53], [-97.75, 17.0], [-97.97, 16.47], [-98.5, 16.25], [-99.0, 16.46], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97], [-101.75, 17.5], [-101.65, 17.75], [-101.7, 17.88], [-102.0, 17.75], [-102.25, 17.85], [-102.5, 17.75], [-102.75, 17.85], [-103.0, 17.75], [-103.53, 17.97], [-103.75, 18.5], [-103.65, 18.75], [-103.75, 19.0], [-103.65, 19.25]]]]}, "2024-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 16.97], [-101.75, 17.5], [-101.53, 18.03], [-101.0, 18.25], [-100.75, 18.15], [-100.62, 18.2], [-100.68, 18.32], [-101.03, 18.47], [-101.25, 19.0], [-101.03, 19.53], [-100.5, 19.75], [-99.97, 19.53], [-99.82, 19.18], [-99.75, 19.15], [-99.5, 19.25], [-98.97, 19.03], [-98.75, 18.5], [-98.97, 17.97], [-99.37, 17.8], [-99.32, 17.68], [-99.0, 17.54], [-98.5, 17.75], [-97.97, 17.53], [-97.75, 17.0], [-97.97, 16.47], [-98.5, 16.25], [-99.0, 16.46], [-99.5, 16.25], [-100.03, 16.47], [-100.18, 16.82], [-100.25, 16.85], [-100.5, 16.75], [-100.75, 16.85], [-101.0, 16.75], [-101.53, 16.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3676608533702392}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.085953256729792}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.82276484690209, 17.430444837109064, 17.573306172587763, 17.719337559646192, 16.753626383499295, 17.221409242876916, 15.917857925856936, 16.447339018960406, 16.08356745062872, 15.939138166117232, 16.39937184073466, 18.46798698022826]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.82276484690209, 17.430444837109064, 17.01548160174633, 17.32113031120508, 10.262923379558345, 10.266197938332994, 6.580577530225753, 7.418307204839834, 7.587051488931195, 8.137107691615654, 9.982923815605602, 14.66022534421279]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2638984197596983, -1.6400300407799477, -1.9113229688953197, -1.7165788575217107, -2.0392407075080956, -2.162646933500397, -2.380712126825484, -1.984346423370305, -2.17652373060091, -2.03405795766722, -1.8818061353457531, -1.71604935258096]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2638984197596983, -1.6400300407799477, -2.0381052870497456, -1.7580175484972074, -2.748824016871481, -3.058995032519988, -3.3676608533702392, -2.7523308666309276, -2.8183821673575267, -2.980863836541573, -2.489716742510268, -2.115538731395702]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3710585058906357, -1.7710877060399435, -2.0338050753545556, -1.8206965459033717, -1.6994410794019625, -1.7365503815576857, -1.946760031164479, -1.6596864968990765, -1.8317010495264443, -1.7174417182955237, -1.5925490596035217, -1.5111883949791802]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3710585058906357, -1.7710877060399435, -2.182733287747178, -1.8579017228251435, -2.1805075549755846, -2.2446111892669407, -2.728363258894027, -2.105750135986808, -2.4484849439450787, -2.5687508740558043, -2.111118100939878, -1.8478008894523406]}}