{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:28.153977", "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": "2017-Jul-21_to_2017-Jul-24_250.5_32.5"}, "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": 2017070000812}, "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": "July 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 24 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 57933.89247193602}, "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": []}, "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": 32.5}, "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": 250.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "250.5\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": 251.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.53], [-111.0, 32.75], [-110.57, 32.57], [-110.75, 33.0], [-110.53, 33.53], [-110.0, 33.75], [-109.75, 33.65], [-109.5, 33.75], [-108.97, 33.53], [-108.82, 33.18], [-108.75, 33.15], [-108.5, 33.25], [-107.97, 33.03], [-107.75, 32.5], [-107.85, 32.25], [-107.75, 32.0], [-107.97, 31.47], [-108.32, 31.32], [-108.47, 30.97], [-109.0, 30.75], [-109.25, 30.85], [-109.32, 30.82], [-109.35, 30.75], [-109.25, 30.5], [-109.35, 30.25], [-109.25, 30.0], [-109.47, 29.47], [-110.0, 29.25], [-110.25, 29.35], [-110.5, 29.25], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.25, 30.5], [-111.15, 30.75], [-111.18, 30.82], [-111.53, 30.97], [-111.75, 31.5], [-111.65, 31.75], [-111.75, 32.0], [-111.53, 32.53]]]]}, "2017-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.53], [-111.0, 32.75], [-110.57, 32.57], [-110.75, 33.0], [-110.53, 33.53], [-110.0, 33.75], [-109.75, 33.65], [-109.5, 33.75], [-108.97, 33.53], [-108.82, 33.18], [-108.75, 33.15], [-108.5, 33.25], [-107.97, 33.03], [-107.75, 32.5], [-107.85, 32.25], [-107.75, 32.0], [-107.97, 31.47], [-108.32, 31.32], [-108.35, 31.25], [-108.25, 31.0], [-108.47, 30.47], [-109.0, 30.25], [-109.25, 30.35], [-109.32, 30.32], [-109.35, 30.25], [-109.25, 30.0], [-109.47, 29.47], [-110.0, 29.25], [-110.25, 29.35], [-110.5, 29.25], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.25, 30.5], [-111.15, 30.75], [-111.18, 30.82], [-111.53, 30.97], [-111.75, 31.5], [-111.65, 31.75], [-111.75, 32.0], [-111.53, 32.53]]]]}, "2017-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.53], [-111.0, 32.75], [-110.57, 32.57], [-110.75, 33.0], [-110.53, 33.53], [-110.0, 33.75], [-109.75, 33.65], [-109.5, 33.75], [-108.97, 33.53], [-108.82, 33.18], [-108.75, 33.15], [-108.5, 33.25], [-107.97, 33.03], [-107.75, 32.5], [-107.85, 32.25], [-107.75, 32.0], [-107.97, 31.47], [-108.32, 31.32], [-108.35, 31.25], [-108.25, 31.0], [-108.47, 30.47], [-109.0, 30.25], [-109.25, 30.35], [-109.32, 30.32], [-109.35, 30.25], [-109.25, 30.0], [-109.47, 29.47], [-110.0, 29.25], [-110.25, 29.35], [-110.5, 29.25], [-111.03, 29.47], [-111.25, 30.0], [-111.15, 30.25], [-111.25, 30.5], [-111.15, 30.75], [-111.18, 30.82], [-111.53, 30.97], [-111.75, 31.5], [-111.65, 31.75], [-111.75, 32.0], [-111.53, 32.53]]]]}, "2017-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 32.53], [-111.0, 32.75], [-110.57, 32.57], [-110.75, 33.0], [-110.53, 33.53], [-110.0, 33.75], [-109.75, 33.65], [-109.5, 33.75], [-108.97, 33.53], [-108.82, 33.18], [-108.47, 33.03], [-108.32, 32.68], [-107.97, 32.53], [-107.75, 32.0], [-107.97, 31.47], [-108.32, 31.32], [-108.35, 31.25], [-108.25, 31.0], [-108.47, 30.47], [-109.0, 30.25], [-109.25, 30.35], [-109.32, 30.32], [-109.47, 29.97], [-110.0, 29.75], [-110.25, 29.85], [-110.5, 29.75], [-111.03, 29.97], [-111.25, 30.5], [-111.15, 30.75], [-111.18, 30.82], [-111.53, 30.97], [-111.75, 31.5], [-111.65, 31.75], [-111.75, 32.0], [-111.53, 32.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.182507404821763}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.701445788409551}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.792101460150207, 22.651720422123105, 22.635315515856803, 22.49156146056322]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.899155727162906, 20.769208683585134, 20.314604301360134, 20.399132960774693]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.639806743588042, -3.7084908421911833, -3.6671339423654774, -3.7979010687360706]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.879730120482748, -5.182507404821763, -4.815270043802457, -4.771158365030772]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6784584256852277, -1.6903689963128101, -1.6652257357707418, -1.691346704431713]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0675132781974654, -2.074210839768628, -2.000655031337893, -1.9391664833243556]}}