{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:06.608482", "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": "2010-Feb-21_to_2010-Feb-26_249.5_38.5"}, "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": 2010020000667}, "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": "February 21 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 26 2010"}, "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": 59811.248832134144}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-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": 38.5}, "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": 249.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.5\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": 252.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.5, 39.75], [-110.25, 39.65], [-110.0, 39.75], [-109.75, 39.65], [-109.62, 39.7], [-109.75, 40.0], [-109.53, 40.53], [-109.0, 40.75], [-108.47, 40.53], [-108.25, 40.0], [-108.47, 39.47], [-108.87, 39.3], [-108.75, 39.0], [-108.97, 38.47], [-109.32, 38.32], [-109.47, 37.97], [-110.0, 37.75], [-110.25, 37.85], [-110.5, 37.75], [-110.75, 37.85], [-111.0, 37.75], [-111.53, 37.97], [-111.75, 38.5], [-111.53, 39.03], [-111.18, 39.18], [-111.03, 39.53], [-110.5, 39.75]]]]}, "2010-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 39.03], [-111.18, 39.18], [-111.15, 39.25], [-111.25, 39.5], [-111.03, 40.03], [-110.68, 40.18], [-110.53, 40.53], [-110.0, 40.75], [-109.75, 40.65], [-109.5, 40.75], [-109.25, 40.65], [-109.18, 40.68], [-109.03, 41.03], [-108.68, 41.18], [-108.53, 41.53], [-108.0, 41.75], [-107.47, 41.53], [-107.25, 41.0], [-107.35, 40.75], [-107.25, 40.5], [-107.37, 40.2], [-106.97, 40.03], [-106.75, 39.5], [-106.97, 38.97], [-107.5, 38.75], [-107.75, 38.85], [-107.82, 38.82], [-107.97, 38.47], [-108.5, 38.25], [-108.75, 38.35], [-108.82, 38.32], [-108.85, 38.25], [-108.75, 38.0], [-108.97, 37.47], [-109.5, 37.25], [-109.75, 37.35], [-110.0, 37.25], [-110.5, 37.46], [-111.0, 37.25], [-111.53, 37.47], [-111.75, 38.0], [-111.65, 38.25], [-111.75, 38.5], [-111.53, 39.03]]]]}, "2010-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 39.03], [-111.18, 39.18], [-111.15, 39.25], [-111.25, 39.5], [-111.03, 40.03], [-110.68, 40.18], [-110.53, 40.53], [-110.0, 40.75], [-109.75, 40.65], [-109.5, 40.75], [-109.25, 40.65], [-109.18, 40.68], [-109.03, 41.03], [-108.68, 41.18], [-108.53, 41.53], [-108.0, 41.75], [-107.47, 41.53], [-107.25, 41.0], [-107.35, 40.75], [-107.25, 40.5], [-107.37, 40.2], [-106.97, 40.03], [-106.75, 39.5], [-106.97, 38.97], [-107.5, 38.75], [-107.75, 38.85], [-107.82, 38.82], [-107.97, 38.47], [-108.5, 38.25], [-108.75, 38.35], [-108.82, 38.32], [-108.85, 38.25], [-108.75, 38.0], [-108.97, 37.47], [-109.5, 37.25], [-109.75, 37.35], [-110.0, 37.25], [-110.5, 37.46], [-111.0, 37.25], [-111.53, 37.47], [-111.75, 38.0], [-111.65, 38.25], [-111.75, 38.5], [-111.53, 39.03]]]]}, "2010-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.53, 39.03], [-111.18, 39.18], [-111.15, 39.25], [-111.25, 39.5], [-111.03, 40.03], [-110.68, 40.18], [-110.53, 40.53], [-110.0, 40.75], [-109.75, 40.65], [-109.5, 40.75], [-109.25, 40.65], [-109.18, 40.68], [-109.03, 41.03], [-108.68, 41.18], [-108.53, 41.53], [-108.0, 41.75], [-107.47, 41.53], [-107.25, 41.0], [-107.35, 40.75], [-107.25, 40.5], [-107.37, 40.2], [-106.97, 40.03], [-106.75, 39.5], [-106.97, 38.97], [-107.5, 38.75], [-107.75, 38.85], [-107.82, 38.82], [-107.97, 38.47], [-108.5, 38.25], [-108.75, 38.35], [-108.82, 38.32], [-108.85, 38.25], [-108.75, 38.0], [-108.97, 37.47], [-109.5, 37.25], [-109.75, 37.35], [-110.0, 37.25], [-110.5, 37.46], [-111.0, 37.25], [-111.53, 37.47], [-111.75, 38.0], [-111.65, 38.25], [-111.75, 38.5], [-111.53, 39.03]]]]}, "2010-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.03, 39.53], [-110.5, 39.75], [-109.97, 39.53], [-109.75, 39.0], [-109.85, 38.75], [-109.75, 38.5], [-109.97, 37.97], [-110.5, 37.75], [-111.03, 37.97], [-111.25, 38.5], [-111.15, 38.75], [-111.25, 39.0], [-111.03, 39.53]]]]}, "2010-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.03, 39.53], [-110.5, 39.75], [-109.97, 39.53], [-109.75, 39.0], [-109.85, 38.75], [-109.75, 38.5], [-109.97, 37.97], [-110.5, 37.75], [-111.03, 37.97], [-111.25, 38.5], [-111.15, 38.75], [-111.25, 39.0], [-111.03, 39.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.890628426008448}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.786578388478976}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.5257045307689054, -7.164284804426131, -10.060617411253304, -6.9416476508279175, -1.7799703258646673, -2.7568375583742295]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.070076176874238, -14.705653952608202, -15.805963608613126, -13.188678318564769, -2.0169130345506687, -3.2843618547812525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.501596368344987, -7.166204397457273, -9.955151991561594, -6.946872844590935, -5.112740709083653, -6.101677286182479]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.876868073799869, -9.8301305607078, -12.890628426008448, -10.302838293732009, -5.353051879158556, -6.145307810625525]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7031812884038566, -1.8322629253658385, -2.5305492600294444, -1.7888622463442443, -1.308127527846922, -1.5674799454539183]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9205908080673846, -2.4329251675128276, -3.5587035788859187, -2.72440837332958, -1.3860080325444486, -1.5807140402295519]}}