{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:22.557647", "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": "2022-Dec-27_to_2023-Jan-08_286.0_-37.5"}, "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": 2022120001238}, "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 27 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 13}, "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": 65446.887244599115}, "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": ["Chile"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["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": -37.5}, "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": 286.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -36.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.75, -35.85], [-74.68, -35.82], [-74.53, -35.47], [-74.0, -35.25], [-73.47, -35.47], [-73.32, -35.82], [-72.97, -35.97], [-72.75, -36.5], [-72.85, -36.75], [-72.75, -37.0], [-72.96, -37.5], [-72.75, -38.0], [-72.85, -38.25], [-72.75, -38.5], [-72.85, -38.75], [-72.75, -39.0], [-72.85, -39.25], [-72.75, -39.5], [-72.97, -40.03], [-73.32, -40.18], [-73.35, -40.25], [-73.25, -40.5], [-73.47, -41.03], [-73.82, -41.18], [-73.97, -41.53], [-74.5, -41.75], [-75.03, -41.53], [-75.25, -41.0], [-75.15, -40.75], [-75.25, -40.5], [-75.15, -40.25], [-75.25, -40.0], [-75.15, -39.75], [-75.25, -39.5], [-75.15, -39.25], [-75.25, -39.0], [-75.15, -38.75], [-75.25, -38.5], [-75.15, -38.25], [-75.25, -38.0], [-75.15, -37.75], [-75.25, -37.5], [-75.15, -37.25], [-75.18, -37.18], [-75.53, -37.03], [-75.75, -36.5], [-75.53, -35.97], [-75.0, -35.75], [-74.75, -35.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.W.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.25, -40.5], [-75.14999999999998, -40.25], [-75.25, -40.0], [-75.14999999999998, -39.75], [-75.25, -39.5], [-75.14999999999998, -39.25], [-75.25, -39.0], [-75.14999999999998, -38.75], [-75.25, -38.5], [-75.14999999999998, -38.25], [-75.25, -38.0], [-75.02999999999997, -37.47], [-74.68, -37.32], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.52999999999997, -36.47], [-74.18, -36.32], [-74.02999999999997, -35.97], [-73.5, -35.75], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.97000000000003, -37.03], [-73.32, -37.18], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.35000000000002, -38.25], [-73.32, -38.32], [-72.97000000000003, -38.47], [-72.75, -39.0], [-72.97000000000003, -39.53], [-73.32, -39.68], [-73.35000000000002, -39.75], [-73.25, -40.0], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-73.82, -41.18], [-73.97000000000003, -41.53], [-74.5, -41.75], [-75.02999999999997, -41.53], [-75.25, -41.0], [-75.14999999999998, -40.75], [-75.25, -40.5]]]]}, "2022-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.52999999999997, -37.03], [-75.75, -36.5], [-75.52999999999997, -35.97], [-75.0, -35.75], [-74.75, -35.85], [-74.5, -35.75], [-74.25, -35.85], [-74.0, -35.75], [-73.75, -35.85], [-73.5, -35.75], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.97000000000003, -37.03], [-73.32, -37.18], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.32, -37.82], [-72.97000000000003, -37.97], [-72.75, -38.5], [-72.85000000000002, -38.75], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.32, -40.18], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-73.82, -41.18], [-73.97000000000003, -41.53], [-74.5, -41.75], [-75.02999999999997, -41.53], [-75.25, -41.0], [-75.14999999999998, -40.75], [-75.25, -40.5], [-75.14999999999998, -40.25], [-75.25, -40.0], [-75.14999999999998, -39.75], [-75.25, -39.5], [-75.14999999999998, -39.25], [-75.25, -39.0], [-75.14999999999998, -38.75], [-75.25, -38.5], [-75.14999999999998, -38.25], [-75.25, -38.0], [-75.14999999999998, -37.75], [-75.25, -37.5], [-75.14999999999998, -37.25], [-75.18, -37.18], [-75.52999999999997, -37.03]]]]}, "2022-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.52999999999997, -37.03], [-75.75, -36.5], [-75.52999999999997, -35.97], [-75.0, -35.75], [-74.75, -35.85], [-74.5, -35.75], [-74.25, -35.85], [-74.0, -35.75], [-73.75, -35.85], [-73.5, -35.75], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.97000000000003, -37.03], [-73.32, -37.18], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.32, -37.82], [-72.97000000000003, -37.97], [-72.75, -38.5], [-72.85000000000002, -38.75], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.32, -40.18], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-73.82, -41.18], [-73.97000000000003, -41.53], [-74.5, -41.75], [-75.02999999999997, -41.53], [-75.25, -41.0], [-75.14999999999998, -40.75], [-75.25, -40.5], [-75.14999999999998, -40.25], [-75.25, -40.0], [-75.14999999999998, -39.75], [-75.25, -39.5], [-75.14999999999998, -39.25], [-75.25, -39.0], [-75.14999999999998, -38.75], [-75.25, -38.5], [-75.14999999999998, -38.25], [-75.25, -38.0], [-75.14999999999998, -37.75], [-75.25, -37.5], [-75.14999999999998, -37.25], [-75.18, -37.18], [-75.52999999999997, -37.03]]]]}, "2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.52999999999997, -37.03], [-75.75, -36.5], [-75.52999999999997, -35.97], [-75.0, -35.75], [-74.75, -35.85], [-74.5, -35.75], [-74.25, -35.85], [-74.0, -35.75], [-73.75, -35.85], [-73.5, -35.75], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.97000000000003, -37.03], [-73.32, -37.18], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.32, -37.82], [-72.97000000000003, -37.97], [-72.75, -38.5], [-72.85000000000002, -38.75], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.32, -40.18], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-74.0, -41.25], [-74.52999999999997, -41.03], [-74.75, -40.5], [-74.64999999999998, -40.25], [-74.75, -40.0], [-74.64999999999998, -39.75], [-74.75, -39.5], [-74.64999999999998, -39.25], [-74.68, -39.18], [-75.02999999999997, -39.03], [-75.25, -38.5], [-75.14999999999998, -38.25], [-75.25, -38.0], [-75.14999999999998, -37.75], [-75.25, -37.5], [-75.14999999999998, -37.25], [-75.18, -37.18], [-75.52999999999997, -37.03]]]]}, "2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.25, -38.0], [-75.14999999999998, -37.75], [-75.25, -37.5], [-75.12, -37.2], [-75.52999999999997, -37.03], [-75.75, -36.5], [-75.52999999999997, -35.97], [-75.0, -35.75], [-74.75, -35.85], [-74.68, -35.82], [-74.52999999999997, -35.47], [-74.0, -35.25], [-73.47000000000003, -35.47], [-73.32, -35.82], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.85000000000002, -36.75], [-72.75, -37.0], [-72.95999999999998, -37.5], [-72.75, -38.0], [-72.85000000000002, -38.25], [-72.75, -38.5], [-72.85000000000002, -38.75], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.32, -40.18], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-74.0, -41.25], [-74.52999999999997, -41.03], [-74.75, -40.5], [-74.64999999999998, -40.25], [-74.75, -40.0], [-74.64999999999998, -39.75], [-74.75, -39.5], [-74.64999999999998, -39.25], [-74.68, -39.18], [-75.02999999999997, -39.03], [-75.25, -38.5], [-75.14999999999998, -38.25], [-75.25, -38.0]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -38.53], [-75.25, -38.0], [-75.02999999999997, -37.47], [-74.68, -37.32], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.64999999999998, -36.25], [-74.75, -36.0], [-74.52999999999997, -35.47], [-74.0, -35.25], [-73.47000000000003, -35.47], [-73.32, -35.82], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.85000000000002, -36.75], [-72.75, -37.0], [-72.95999999999998, -37.5], [-72.75, -38.0], [-72.95999999999998, -38.5], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.32, -40.18], [-73.35000000000002, -40.25], [-73.25, -40.5], [-73.47000000000003, -41.03], [-74.0, -41.25], [-74.52999999999997, -41.03], [-74.75, -40.5], [-74.64999999999998, -40.25], [-74.75, -40.0], [-74.64999999999998, -39.75], [-74.75, -39.5], [-74.64999999999998, -39.25], [-74.75, -39.0], [-74.64999999999998, -38.75], [-74.68, -38.68], [-75.02999999999997, -38.53]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -38.53], [-75.25, -38.0], [-75.02999999999997, -37.47], [-74.68, -37.32], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.64999999999998, -36.25], [-74.75, -36.0], [-74.52999999999997, -35.47], [-74.0, -35.25], [-73.47000000000003, -35.47], [-73.32, -35.82], [-72.97000000000003, -35.97], [-72.75, -36.5], [-72.85000000000002, -36.75], [-72.75, -37.0], [-72.95999999999998, -37.5], [-72.75, -38.0], [-72.95999999999998, -38.5], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.37, -40.2], [-73.25, -40.5], [-73.47000000000003, -41.03], [-74.0, -41.25], [-74.52999999999997, -41.03], [-74.75, -40.5], [-74.54000000000002, -40.0], [-74.75, -39.5], [-74.64999999999998, -39.25], [-74.75, -39.0], [-74.64999999999998, -38.75], [-74.68, -38.68], [-75.02999999999997, -38.53]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, -38.53], [-75.25, -38.0], [-75.02999999999997, -37.47], [-74.68, -37.32], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.64999999999998, -36.25], [-74.75, -36.0], [-74.52999999999997, -35.47], [-74.0, -35.25], [-73.47000000000003, -35.47], [-73.25, -36.0], [-73.35000000000002, -36.25], [-73.25, -36.5], [-73.35000000000002, -36.75], [-73.25, -37.0], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.35000000000002, -38.25], [-73.32, -38.32], [-72.97000000000003, -38.47], [-72.75, -39.0], [-72.85000000000002, -39.25], [-72.75, -39.5], [-72.97000000000003, -40.03], [-73.5, -40.25], [-73.75, -40.15], [-74.0, -40.25], [-74.52999999999997, -40.03], [-74.75, -39.5], [-74.64999999999998, -39.25], [-74.75, -39.0], [-74.64999999999998, -38.75], [-74.68, -38.68], [-75.02999999999997, -38.53]]]]}, "2023-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, -37.5], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.52999999999997, -35.97], [-74.0, -35.75], [-73.47000000000003, -35.97], [-73.25, -36.5], [-73.35000000000002, -36.75], [-73.25, -37.0], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.47000000000003, -38.53], [-74.0, -38.75], [-74.52999999999997, -38.53], [-74.75, -38.0], [-74.64999999999998, -37.75], [-74.75, -37.5]]]]}, "2023-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, -38.0], [-74.64999999999998, -37.75], [-74.75, -37.5], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.52999999999997, -35.97], [-74.0, -35.75], [-73.47000000000003, -35.97], [-73.25, -36.5], [-73.35000000000002, -36.75], [-73.25, -37.0], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.35000000000002, -38.25], [-73.25, -38.5], [-73.47000000000003, -39.03], [-74.0, -39.25], [-74.52999999999997, -39.03], [-74.75, -38.5], [-74.64999999999998, -38.25], [-74.75, -38.0]]]]}, "2023-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, -38.0], [-74.64999999999998, -37.75], [-74.75, -37.5], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.52999999999997, -35.97], [-74.0, -35.75], [-73.47000000000003, -35.97], [-73.25, -36.5], [-73.35000000000002, -36.75], [-73.25, -37.0], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.35000000000002, -38.25], [-73.25, -38.5], [-73.47000000000003, -39.03], [-74.0, -39.25], [-74.52999999999997, -39.03], [-74.75, -38.5], [-74.64999999999998, -38.25], [-74.75, -38.0]]]]}, "2023-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, -38.0], [-74.64999999999998, -37.75], [-74.75, -37.5], [-74.64999999999998, -37.25], [-74.75, -37.0], [-74.64999999999998, -36.75], [-74.75, -36.5], [-74.52999999999997, -35.97], [-74.0, -35.75], [-73.47000000000003, -35.97], [-73.25, -36.5], [-73.35000000000002, -36.75], [-73.25, -37.0], [-73.35000000000002, -37.25], [-73.25, -37.5], [-73.35000000000002, -37.75], [-73.25, -38.0], [-73.35000000000002, -38.25], [-73.25, -38.5], [-73.47000000000003, -39.03], [-74.0, -39.25], [-74.52999999999997, -39.03], [-74.75, -38.5], [-74.64999999999998, -38.25], [-74.75, -38.0]]]]}, "2023-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.52999999999997, -35.97], [-74.0, -35.75], [-73.47000000000003, -35.97], [-73.25, -36.5], [-73.47000000000003, -37.03], [-74.0, -37.25], [-74.52999999999997, -37.03], [-74.75, -36.5], [-74.52999999999997, -35.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2543895970929384}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7209634265774065}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.118725349180863, 12.694645147543383, 12.99522773574023, 13.182623556288036, 13.161619662982389, 13.223953346363373, 13.245776346587547, 13.440241843159754, 13.6577383545241, 13.367886710373512, 12.207890945996667, 12.578145165706076, 13.726141618091674]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.094094860430175, 11.571321048018433, 11.783651582036157, 12.153461156992933, 11.814581355160271, 12.430287775192198, 12.301528690829798, 12.748592877717556, 13.277999648689672, 12.798673838543777, 11.432764132221735, 11.731669149491495, 13.726141618091674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.459802647225411, -2.0782755756888656, -1.7982773073741403, -1.6644122414674238, -1.7189563448610854, -1.5329402731507393, -1.5361804619703852, -1.3657472654638705, -1.222070856996666, -1.5159126516852097, -2.693671291082785, -2.3481069587078425, -1.5553530566828613]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.812602789557559, -2.529912236833809, -2.55508424967951, -2.5606636064878785, -2.618372246316767, -2.288372969270881, -2.0071202178530143, -1.6774610199254312, -1.3807584501996644, -1.8746801915877995, -3.2543895970929384, -2.981482259248253, -1.5553530566828613]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6505794513328544, -2.419242169322915, -2.0244453180591457, -1.8882256338939047, -1.9376570170745715, -1.7094269389834889, -1.7121641250930237, -1.5195144752314973, -1.3681218559883588, -1.711311953635357, -3.186638554038389, -2.816640257420181, -1.9442789889952123]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.089003200486602, -2.957200560304589, -2.8997607561724217, -2.7943818892977736, -2.8320073661185985, -2.4517188806112395, -2.210786496613353, -1.7270261419124315, -1.4639065161742848, -2.0593479047791434, -3.5874314694335716, -3.522376236173015, -1.9442789889952123]}}