{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:25:20.307273", "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": "2021-Jun-25_to_2021-Jun-27_352.5_55.5"}, "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": 2021060001206}, "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": "June 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 88320.74225114577}, "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": ["Ireland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Atlantic Ocean", "Sea of the Hebrides"]}, "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": 55.5}, "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": 352.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-15.25, 52.0], [-15.03, 52.53], [-14.625, 52.698], [-14.75, 53.0], [-14.53, 53.53], [-14.177, 53.677], [-14.03, 54.03], [-13.677, 54.177], [-13.53, 54.53], [-13.0, 54.75], [-12.75, 54.646], [-12.677, 54.677], [-12.53, 55.03], [-12.0, 55.25], [-11.75, 55.146], [-11.5, 55.25], [-11.25, 55.146], [-11.0, 55.25], [-10.75, 55.146], [-10.677, 55.177], [-10.53, 55.53], [-10.0, 55.75], [-9.75, 55.646], [-9.677, 55.677], [-9.53, 56.03], [-9.0, 56.25], [-8.75, 56.146], [-8.5, 56.25], [-8.25, 56.146], [-8.0, 56.25], [-7.75, 56.146], [-7.5, 56.25], [-6.97, 56.03], [-6.75, 55.5], [-6.97, 54.97], [-7.323, 54.823], [-7.47, 54.47], [-8.0, 54.25], [-8.25, 54.354], [-8.5, 54.25], [-8.75, 54.354], [-8.823, 54.323], [-8.97, 53.97], [-9.5, 53.75], [-9.75, 53.854], [-9.823, 53.823], [-9.97, 53.47], [-10.323, 53.323], [-10.47, 52.97], [-10.823, 52.823], [-10.854, 52.75], [-10.75, 52.5], [-10.97, 51.97], [-11.323, 51.823], [-11.354, 51.75], [-11.25, 51.5], [-11.47, 50.97], [-12.0, 50.75], [-12.25, 50.854], [-12.5, 50.75], [-12.75, 50.854], [-13.0, 50.75], [-13.25, 50.854], [-13.5, 50.75], [-13.75, 50.854], [-14.0, 50.75], [-14.53, 50.97], [-14.677, 51.323], [-15.03, 51.47], [-15.25, 52.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.67677669529661, 51.32322330470336], [-15.030330085889887, 51.46966991411009], [-15.25, 52.0], [-15.030330085889887, 52.53033008588991], [-14.625, 52.69822330470337], [-14.75, 53.0], [-14.530330085889887, 53.53033008588991], [-14.17677669529661, 53.67677669529664], [-14.030330085889887, 54.03033008588991], [-13.67677669529661, 54.17677669529664], [-13.530330085889887, 54.53033008588991], [-13.0, 54.75], [-12.75, 54.64644660940672], [-12.67677669529661, 54.67677669529664], [-12.530330085889887, 55.03033008588991], [-12.0, 55.25], [-11.75, 55.14644660940672], [-11.5, 55.25], [-11.25, 55.14644660940672], [-11.0, 55.25], [-10.75, 55.14644660940672], [-10.67677669529661, 55.17677669529664], [-10.530330085889887, 55.53033008588991], [-10.0, 55.75], [-9.75, 55.64644660940672], [-9.67677669529661, 55.67677669529664], [-9.530330085889887, 56.03033008588991], [-9.0, 56.25], [-8.75, 56.14644660940672], [-8.5, 56.25], [-8.25, 56.14644660940672], [-8.0, 56.25], [-7.75, 56.14644660940672], [-7.5, 56.25], [-6.9696699141101135, 56.03033008588991], [-6.75, 55.5], [-6.9696699141101135, 54.96966991411009], [-7.32322330470339, 54.82322330470336], [-7.4696699141101135, 54.46966991411009], [-8.0, 54.25], [-8.25, 54.35355339059328], [-8.5, 54.25], [-8.75, 54.35355339059328], [-8.82322330470339, 54.32322330470336], [-8.969669914110113, 53.96966991411009], [-9.5, 53.75], [-9.75, 53.85355339059328], [-9.82322330470339, 53.82322330470336], [-9.969669914110113, 53.46966991411009], [-10.32322330470339, 53.32322330470336], [-10.469669914110113, 52.96966991411009], [-10.82322330470339, 52.82322330470336], [-10.853553390593277, 52.75], [-10.75, 52.5], [-10.969669914110113, 51.96966991411009], [-11.32322330470339, 51.82322330470336], [-11.353553390593277, 51.75], [-11.25, 51.5], [-11.469669914110113, 50.96966991411009], [-12.0, 50.75], [-12.25, 50.85355339059328], [-12.5, 50.75], [-12.75, 50.85355339059328], [-13.0, 50.75], [-13.25, 50.85355339059328], [-13.5, 50.75], [-13.75, 50.85355339059328], [-14.0, 50.75], [-14.530330085889887, 50.96966991411009], [-14.67677669529661, 51.32322330470336]]]}, "2021-06-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.67677669529661, 51.32322330470336], [-15.030330085889887, 51.46966991411009], [-15.25, 52.0], [-15.030330085889887, 52.53033008588991], [-14.625, 52.69822330470337], [-14.75, 53.0], [-14.530330085889887, 53.53033008588991], [-14.17677669529661, 53.67677669529664], [-14.030330085889887, 54.03033008588991], [-13.67677669529661, 54.17677669529664], [-13.530330085889887, 54.53033008588991], [-13.0, 54.75], [-12.75, 54.64644660940672], [-12.67677669529661, 54.67677669529664], [-12.530330085889887, 55.03033008588991], [-12.0, 55.25], [-11.75, 55.14644660940672], [-11.5, 55.25], [-11.25, 55.14644660940672], [-11.0, 55.25], [-10.75, 55.14644660940672], [-10.67677669529661, 55.17677669529664], [-10.530330085889887, 55.53033008588991], [-10.0, 55.75], [-9.75, 55.64644660940672], [-9.67677669529661, 55.67677669529664], [-9.530330085889887, 56.03033008588991], [-9.0, 56.25], [-8.75, 56.14644660940672], [-8.5, 56.25], [-8.25, 56.14644660940672], [-8.0, 56.25], [-7.75, 56.14644660940672], [-7.5, 56.25], [-6.9696699141101135, 56.03033008588991], [-6.75, 55.5], [-6.9696699141101135, 54.96966991411009], [-7.32322330470339, 54.82322330470336], [-7.4696699141101135, 54.46966991411009], [-8.0, 54.25], [-8.25, 54.35355339059328], [-8.5, 54.25], [-8.75, 54.35355339059328], [-8.82322330470339, 54.32322330470336], [-8.969669914110113, 53.96966991411009], [-9.5, 53.75], [-9.75, 53.85355339059328], [-9.82322330470339, 53.82322330470336], [-9.969669914110113, 53.46966991411009], [-10.32322330470339, 53.32322330470336], [-10.469669914110113, 52.96966991411009], [-10.82322330470339, 52.82322330470336], [-10.853553390593277, 52.75], [-10.75, 52.5], [-10.969669914110113, 51.96966991411009], [-11.32322330470339, 51.82322330470336], [-11.353553390593277, 51.75], [-11.25, 51.5], [-11.469669914110113, 50.96966991411009], [-12.0, 50.75], [-12.25, 50.85355339059328], [-12.5, 50.75], [-12.75, 50.85355339059328], [-13.0, 50.75], [-13.25, 50.85355339059328], [-13.5, 50.75], [-13.75, 50.85355339059328], [-14.0, 50.75], [-14.530330085889887, 50.96966991411009], [-14.67677669529661, 51.32322330470336]]]}, "2021-06-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-14.67677669529661, 51.32322330470336], [-15.030330085889887, 51.46966991411009], [-15.25, 52.0], [-15.030330085889887, 52.53033008588991], [-14.625, 52.69822330470337], [-14.75, 53.0], [-14.530330085889887, 53.53033008588991], [-14.17677669529661, 53.67677669529664], [-14.030330085889887, 54.03033008588991], [-13.67677669529661, 54.17677669529664], [-13.530330085889887, 54.53033008588991], [-13.0, 54.75], [-12.75, 54.64644660940672], [-12.67677669529661, 54.67677669529664], [-12.530330085889887, 55.03033008588991], [-12.0, 55.25], [-11.75, 55.14644660940672], [-11.5, 55.25], [-11.25, 55.14644660940672], [-11.0, 55.25], [-10.75, 55.14644660940672], [-10.67677669529661, 55.17677669529664], [-10.530330085889887, 55.53033008588991], [-10.0, 55.75], [-9.75, 55.64644660940672], [-9.67677669529661, 55.67677669529664], [-9.530330085889887, 56.03033008588991], [-9.0, 56.25], [-8.75, 56.14644660940672], [-8.5, 56.25], [-8.25, 56.14644660940672], [-8.0, 56.25], [-7.75, 56.14644660940672], [-7.5, 56.25], [-6.9696699141101135, 56.03033008588991], [-6.75, 55.5], [-6.9696699141101135, 54.96966991411009], [-7.32322330470339, 54.82322330470336], [-7.4696699141101135, 54.46966991411009], [-8.0, 54.25], [-8.25, 54.35355339059328], [-8.5, 54.25], [-8.75, 54.35355339059328], [-8.82322330470339, 54.32322330470336], [-8.969669914110113, 53.96966991411009], [-9.5, 53.75], [-9.75, 53.85355339059328], [-9.82322330470339, 53.82322330470336], [-9.969669914110113, 53.46966991411009], [-10.32322330470339, 53.32322330470336], [-10.469669914110113, 52.96966991411009], [-10.82322330470339, 52.82322330470336], [-10.853553390593277, 52.75], [-10.75, 52.5], [-10.969669914110113, 51.96966991411009], [-11.32322330470339, 51.82322330470336], [-11.353553390593277, 51.75], [-11.25, 51.5], [-11.469669914110113, 50.96966991411009], [-12.0, 50.75], [-12.25, 50.85355339059328], [-12.5, 50.75], [-12.75, 50.85355339059328], [-13.0, 50.75], [-13.25, 50.85355339059328], [-13.5, 50.75], [-13.75, 50.85355339059328], [-14.0, 50.75], [-14.530330085889887, 50.96966991411009], [-14.67677669529661, 51.32322330470336]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3844516892580714}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5067144288808079}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.850323373902313, 12.003989359170191, 12.164947612811204]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.929134808124502, 11.262926099629738, 11.288872764716643]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5449145565675977, -1.5161715401035494, -1.4590571899712768]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3844516892580714, -2.161393147357785, -2.3223466329566236]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3730773806060501, -1.3221802965525553, -1.2575756678644938]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4795659726026675, -1.5573270126814716, -1.4696382728652722]}}