{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:43.063972", "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": "2020-Jul-23_to_2020-Jul-28_252.0_36.0"}, "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": 2020070000830}, "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 23 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 28 2020"}, "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": 61906.27492607999}, "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", "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": 36.0}, "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": 252.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "252.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 249.75}, "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": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 33.53], [-110.18, 33.68], [-110.15, 33.75], [-110.25, 34.0], [-110.15, 34.25], [-110.25, 34.5], [-110.15, 34.75], [-110.25, 35.0], [-110.03, 35.53], [-109.5, 35.75], [-109.25, 35.65], [-109.18, 35.68], [-109.03, 36.03], [-108.5, 36.25], [-107.97, 36.03], [-107.75, 35.5], [-107.97, 34.97], [-108.32, 34.82], [-108.35, 34.75], [-108.25, 34.5], [-108.47, 33.97], [-108.82, 33.82], [-108.85, 33.75], [-108.75, 33.5], [-108.85, 33.25], [-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], [-108.82, 30.32], [-108.97, 29.97], [-109.5, 29.75], [-110.03, 29.97], [-110.25, 30.5], [-110.15, 30.75], [-110.25, 31.0], [-110.15, 31.25], [-110.25, 31.5], [-110.15, 31.75], [-110.18, 31.82], [-110.53, 31.97], [-110.75, 32.5], [-110.65, 32.75], [-110.75, 33.0], [-110.53, 33.53]]]]}, "2020-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 33.53], [-110.18, 33.68], [-110.15, 33.75], [-110.25, 34.0], [-110.15, 34.25], [-110.25, 34.5], [-110.15, 34.75], [-110.25, 35.0], [-110.03, 35.53], [-109.5, 35.75], [-109.25, 35.65], [-109.18, 35.68], [-109.15, 35.75], [-109.25, 36.0], [-109.03, 36.53], [-108.68, 36.68], [-108.53, 37.03], [-108.0, 37.25], [-107.47, 37.03], [-107.32, 36.68], [-106.97, 36.53], [-106.75, 36.0], [-106.97, 35.47], [-107.5, 35.25], [-107.75, 35.35], [-107.82, 35.32], [-107.97, 34.97], [-108.32, 34.82], [-108.35, 34.75], [-108.25, 34.5], [-108.47, 33.97], [-108.82, 33.82], [-108.85, 33.75], [-108.75, 33.5], [-108.85, 33.25], [-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], [-108.82, 30.32], [-108.97, 29.97], [-109.5, 29.75], [-110.03, 29.97], [-110.25, 30.5], [-110.15, 30.75], [-110.25, 31.0], [-110.15, 31.25], [-110.25, 31.5], [-110.15, 31.75], [-110.18, 31.82], [-110.53, 31.97], [-110.75, 32.5], [-110.65, 32.75], [-110.75, 33.0], [-110.53, 33.53]]]]}, "2020-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 33.53], [-110.18, 33.68], [-110.15, 33.75], [-110.25, 34.0], [-110.15, 34.25], [-110.25, 34.5], [-110.15, 34.75], [-110.25, 35.0], [-110.03, 35.53], [-109.5, 35.75], [-109.25, 35.65], [-109.18, 35.68], [-109.15, 35.75], [-109.25, 36.0], [-109.03, 36.53], [-108.68, 36.68], [-108.53, 37.03], [-108.0, 37.25], [-107.47, 37.03], [-107.32, 36.68], [-106.97, 36.53], [-106.75, 36.0], [-106.97, 35.47], [-107.5, 35.25], [-107.75, 35.35], [-107.82, 35.32], [-107.97, 34.97], [-108.32, 34.82], [-108.35, 34.75], [-108.25, 34.5], [-108.47, 33.97], [-108.82, 33.82], [-108.85, 33.75], [-108.75, 33.5], [-108.85, 33.25], [-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], [-108.82, 30.32], [-108.97, 29.97], [-109.5, 29.75], [-110.03, 29.97], [-110.25, 30.5], [-110.15, 30.75], [-110.25, 31.0], [-110.15, 31.25], [-110.25, 31.5], [-110.15, 31.75], [-110.18, 31.82], [-110.53, 31.97], [-110.75, 32.5], [-110.65, 32.75], [-110.75, 33.0], [-110.53, 33.53]]]]}, "2020-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.0, 37.25], [-107.47, 37.03], [-107.32, 36.68], [-106.97, 36.53], [-106.75, 36.0], [-106.97, 35.47], [-107.5, 35.25], [-107.75, 35.35], [-108.0, 35.25], [-108.25, 35.35], [-108.5, 35.25], [-109.03, 35.47], [-109.25, 36.0], [-109.03, 36.53], [-108.68, 36.68], [-108.53, 37.03], [-108.0, 37.25]]]]}, "2020-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.0, 36.75], [-107.47, 36.53], [-107.25, 36.0], [-107.47, 35.47], [-108.0, 35.25], [-108.53, 35.47], [-108.75, 36.0], [-108.53, 36.53], [-108.0, 36.75]]]]}, "2020-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.0, 36.75], [-107.47, 36.53], [-107.25, 36.0], [-107.47, 35.47], [-108.0, 35.25], [-108.53, 35.47], [-108.75, 36.0], [-108.53, 36.53], [-108.0, 36.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.37635643239372}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.213050724164472}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.405986071058123, 19.889008159818616, 20.29638588382022, 20.192484540537066, 20.441277670678744, 20.057076720491295]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.324805300361618, 13.897192767761283, 13.840183393969994, 19.259790070728968, 20.441277670678744, 20.057076720491295]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.4914705998645585, -4.819797296001052, -4.363235261971845, -3.6198327976215694, -3.387225955057943, -3.6770030539860272]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.700780222123058, -6.37635643239372, -6.070884040940882, -4.100692974994956, -3.387225955057943, -3.6770030539860272]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5496653251765802, -2.1381004602575673, -1.9336236892502734, -1.602974928740717, -1.4785157974407386, -1.5904446639232426]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.053532687619991, -2.5088703700132347, -2.384140379322571, -1.7956862395338993, -1.4785157974407386, -1.5904446639232426]}}