{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:04.238609", "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-Jul-12_to_2021-Jul-15_355.0_43.5"}, "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": 2021070000573}, "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 12 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 15 2021"}, "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": 91851.53609732105}, "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": ["France", "Spain"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "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": []}, "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": 43.5}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 353.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 361.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-2.0, 44.25], [-1.75, 44.146], [-1.677, 44.177], [-1.53, 44.53], [-1.0, 44.75], [-0.5, 44.543], [0.0, 44.75], [0.53, 44.53], [0.677, 44.177], [0.75, 44.146], [1.0, 44.25], [1.53, 44.03], [1.75, 43.5], [1.53, 42.97], [1.0, 42.75], [0.75, 42.854], [0.5, 42.75], [0.25, 42.854], [0.0, 42.75], [-0.25, 42.854], [-0.5, 42.75], [-0.75, 42.854], [-1.0, 42.75], [-1.25, 42.854], [-1.323, 42.823], [-1.354, 42.75], [-1.25, 42.5], [-1.47, 41.97], [-2.0, 41.75], [-2.53, 41.97], [-2.677, 42.323], [-2.75, 42.354], [-2.823, 42.323], [-2.97, 41.97], [-3.5, 41.75], [-3.75, 41.854], [-4.0, 41.75], [-4.53, 41.97], [-4.677, 42.323], [-4.75, 42.354], [-5.0, 42.25], [-5.25, 42.354], [-5.5, 42.25], [-6.03, 42.47], [-6.177, 42.823], [-6.226, 42.844], [-6.25, 42.854], [-6.5, 42.75], [-7.03, 42.97], [-7.177, 43.323], [-7.53, 43.47], [-7.75, 44.0], [-7.646, 44.25], [-7.75, 44.5], [-7.53, 45.03], [-7.0, 45.25], [-6.75, 45.146], [-6.5, 45.25], [-5.97, 45.03], [-5.823, 44.677], [-5.75, 44.646], [-5.5, 44.75], [-5.25, 44.646], [-5.177, 44.677], [-5.03, 45.03], [-4.5, 45.25], [-3.97, 45.03], [-3.802, 44.625], [-3.677, 44.677], [-3.53, 45.03], [-3.0, 45.25], [-2.47, 45.03], [-2.25, 44.5], [-2.354, 44.25], [-2.323, 44.177], [-2.25, 44.146], [-2.0, 44.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe", "Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-7.646446609406723, 44.25], [-7.75, 44.5], [-7.5303300858898865, 45.03033008588991], [-7.0, 45.25], [-6.75, 45.14644660940672], [-6.5, 45.25], [-5.9696699141101135, 45.03033008588991], [-5.82322330470339, 44.67677669529664], [-5.75, 44.64644660940672], [-5.5, 44.75], [-5.25, 44.64644660940672], [-5.17677669529661, 44.67677669529664], [-5.0303300858898865, 45.03033008588991], [-4.5, 45.25], [-3.9696699141101135, 45.03033008588991], [-3.8017766952966667, 44.62499999999999], [-3.67677669529661, 44.67677669529664], [-3.5303300858898865, 45.03033008588991], [-3.0, 45.25], [-2.4696699141101135, 45.03033008588991], [-2.25, 44.5], [-2.3535533905932766, 44.25], [-2.32322330470339, 44.17677669529664], [-2.25, 44.14644660940672], [-2.0, 44.25], [-1.75, 44.14644660940672], [-1.6767766952966099, 44.17677669529664], [-1.5303300858898865, 44.53033008588991], [-1.0, 44.75], [-0.5, 44.54289321881344], [0.0, 44.75], [0.5303300858898865, 44.53033008588991], [0.6767766952966099, 44.17677669529664], [0.75, 44.14644660940672], [1.0, 44.25], [1.5303300858898865, 44.03033008588991], [1.75, 43.5], [1.5303300858898865, 42.96966991411009], [1.0, 42.75], [0.75, 42.85355339059328], [0.5, 42.75], [0.25, 42.85355339059328], [0.0, 42.75], [-0.25, 42.85355339059328], [-0.5, 42.75], [-0.75, 42.85355339059328], [-1.0, 42.75], [-1.25, 42.85355339059328], [-1.3232233047033901, 42.82322330470336], [-1.3535533905932766, 42.75], [-1.25, 42.5], [-1.4696699141101135, 41.96966991411009], [-2.0, 41.75], [-2.5303300858898865, 41.96966991411009], [-2.67677669529661, 42.32322330470336], [-2.75, 42.35355339059328], [-2.82322330470339, 42.32322330470336], [-2.9696699141101135, 41.96966991411009], [-3.5, 41.75], [-3.75, 41.85355339059328], [-4.0, 41.75], [-4.5303300858898865, 41.96966991411009], [-4.67677669529661, 42.32322330470336], [-4.75, 42.35355339059328], [-5.0, 42.25], [-5.25, 42.35355339059328], [-5.5, 42.25], [-6.0303300858898865, 42.46966991411009], [-6.17677669529661, 42.82322330470336], [-6.25, 42.85355339059328], [-6.5, 42.75], [-7.0303300858898865, 42.96966991411009], [-7.17677669529661, 43.32322330470336], [-7.5303300858898865, 43.46966991411009], [-7.75, 44.0], [-7.646446609406723, 44.25]]]}, "2021-07-13T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-7.646446609406723, 44.25], [-7.75, 44.5], [-7.5303300858898865, 45.03033008588991], [-7.0, 45.25], [-6.75, 45.14644660940672], [-6.5, 45.25], [-5.9696699141101135, 45.03033008588991], [-5.82322330470339, 44.67677669529664], [-5.75, 44.64644660940672], [-5.5, 44.75], [-5.25, 44.64644660940672], [-5.17677669529661, 44.67677669529664], [-5.0303300858898865, 45.03033008588991], [-4.5, 45.25], [-3.9696699141101135, 45.03033008588991], [-3.8017766952966667, 44.62499999999999], [-3.67677669529661, 44.67677669529664], [-3.5303300858898865, 45.03033008588991], [-3.0, 45.25], [-2.4696699141101135, 45.03033008588991], [-2.25, 44.5], [-2.3535533905932766, 44.25], [-2.32322330470339, 44.17677669529664], [-2.25, 44.14644660940672], [-2.0, 44.25], [-1.75, 44.14644660940672], [-1.6767766952966099, 44.17677669529664], [-1.5303300858898865, 44.53033008588991], [-1.0, 44.75], [-0.5, 44.54289321881344], [0.0, 44.75], [0.5303300858898865, 44.53033008588991], [0.6767766952966099, 44.17677669529664], [0.75, 44.14644660940672], [1.0, 44.25], [1.5303300858898865, 44.03033008588991], [1.75, 43.5], [1.5303300858898865, 42.96966991411009], [1.0, 42.75], [0.75, 42.85355339059328], [0.5, 42.75], [0.25, 42.85355339059328], [0.0, 42.75], [-0.25, 42.85355339059328], [-0.5, 42.75], [-0.75, 42.85355339059328], [-1.0, 42.75], [-1.25, 42.85355339059328], [-1.3232233047033901, 42.82322330470336], [-1.3535533905932766, 42.75], [-1.25, 42.5], [-1.4696699141101135, 41.96966991411009], [-2.0, 41.75], [-2.5303300858898865, 41.96966991411009], [-2.67677669529661, 42.32322330470336], [-2.75, 42.35355339059328], [-2.82322330470339, 42.32322330470336], [-2.9696699141101135, 41.96966991411009], [-3.5, 41.75], [-3.75, 41.85355339059328], [-4.0, 41.75], [-4.5303300858898865, 41.96966991411009], [-4.67677669529661, 42.32322330470336], [-4.75, 42.35355339059328], [-5.0, 42.25], [-5.25, 42.35355339059328], [-5.5, 42.25], [-6.0303300858898865, 42.46966991411009], [-6.17677669529661, 42.82322330470336], [-6.25, 42.85355339059328], [-6.5, 42.75], [-7.0303300858898865, 42.96966991411009], [-7.17677669529661, 43.32322330470336], [-7.5303300858898865, 43.46966991411009], [-7.75, 44.0], [-7.646446609406723, 44.25]]]}, "2021-07-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-7.646446609406723, 44.25], [-7.75, 44.5], [-7.5303300858898865, 45.03033008588991], [-7.0, 45.25], [-6.75, 45.14644660940672], [-6.5, 45.25], [-5.9696699141101135, 45.03033008588991], [-5.82322330470339, 44.67677669529664], [-5.75, 44.64644660940672], [-5.5, 44.75], [-5.25, 44.64644660940672], [-5.17677669529661, 44.67677669529664], [-5.0303300858898865, 45.03033008588991], [-4.5, 45.25], [-3.9696699141101135, 45.03033008588991], [-3.8017766952966667, 44.62499999999999], [-3.67677669529661, 44.67677669529664], [-3.5303300858898865, 45.03033008588991], [-3.0, 45.25], [-2.4696699141101135, 45.03033008588991], [-2.25, 44.5], [-2.3535533905932766, 44.25], [-2.32322330470339, 44.17677669529664], [-2.25, 44.14644660940672], [-2.0, 44.25], [-1.75, 44.14644660940672], [-1.6767766952966099, 44.17677669529664], [-1.5303300858898865, 44.53033008588991], [-1.0, 44.75], [-0.5, 44.54289321881344], [0.0, 44.75], [0.5303300858898865, 44.53033008588991], [0.6767766952966099, 44.17677669529664], [0.75, 44.14644660940672], [1.0, 44.25], [1.5303300858898865, 44.03033008588991], [1.75, 43.5], [1.5303300858898865, 42.96966991411009], [1.0, 42.75], [0.75, 42.85355339059328], [0.5, 42.75], [0.25, 42.85355339059328], [0.0, 42.75], [-0.25, 42.85355339059328], [-0.5, 42.75], [-0.75, 42.85355339059328], [-1.0, 42.75], [-1.25, 42.85355339059328], [-1.3232233047033901, 42.82322330470336], [-1.3535533905932766, 42.75], [-1.25, 42.5], [-1.4696699141101135, 41.96966991411009], [-2.0, 41.75], [-2.5303300858898865, 41.96966991411009], [-2.67677669529661, 42.32322330470336], [-2.75, 42.35355339059328], [-2.82322330470339, 42.32322330470336], [-2.9696699141101135, 41.96966991411009], [-3.5, 41.75], [-3.75, 41.85355339059328], [-4.0, 41.75], [-4.5303300858898865, 41.96966991411009], [-4.67677669529661, 42.32322330470336], [-4.75, 42.35355339059328], [-5.0, 42.25], [-5.25, 42.35355339059328], [-5.5, 42.25], [-6.0303300858898865, 42.46966991411009], [-6.17677669529661, 42.82322330470336], [-6.25, 42.85355339059328], [-6.5, 42.75], [-7.0303300858898865, 42.96966991411009], [-7.17677669529661, 43.32322330470336], [-7.5303300858898865, 43.46966991411009], [-7.75, 44.0], [-7.646446609406723, 44.25]]]}, "2021-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.0303300858898865, 44.03033008588991], [-2.5, 44.25], [-2.25, 44.14644660940672], [-2.0, 44.25], [-1.4696699141101135, 44.03033008588991], [-1.25, 43.5], [-1.4696699141101135, 42.96966991411009], [-1.8232233047033901, 42.82322330470336], [-1.9696699141101135, 42.46966991411009], [-2.5, 42.25], [-2.75, 42.35355339059328], [-3.0, 42.25], [-3.5303300858898865, 42.46966991411009], [-3.75, 43.0], [-3.5303300858898865, 43.53033008588991], [-3.17677669529661, 43.67677669529664], [-3.0303300858898865, 44.03033008588991]]], [[[-6.0, 42.75], [-6.5303300858898865, 42.96966991411009], [-6.75, 43.5], [-6.5303300858898865, 44.03033008588991], [-6.0, 44.25], [-5.75, 44.14644660940672], [-5.5, 44.25], [-5.25, 44.14644660940672], [-5.0, 44.25], [-4.4696699141101135, 44.03033008588991], [-4.25, 43.5], [-4.4696699141101135, 42.96966991411009], [-5.0, 42.75], [-5.25, 42.85355339059328], [-5.5, 42.75], [-5.75, 42.85355339059328], [-6.0, 42.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.694197290551472}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9623895360802024}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.650649955245228, 15.71947786130903, 16.09300988117093, 16.71012568973873]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.30773610526927, 10.197467703437553, 11.679766911003469, 15.28011131052034]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.051465664502058, -3.116901180463232, -2.8535355491900756, -2.250225239102195]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.389002055541823, -5.694197290551472, -4.721326224227084, -2.9707257588999596]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6080251545316577, -1.5824639872568746, -1.494143351784785, -1.2788434357518883]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9292394639851025, -2.0179335385345123, -1.6964947756822426, -1.3436489628735024]}}