{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:13:17.718866", "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-May-02_to_2020-May-09_45.5_15.0"}, "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": 2020050000106}, "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": "May 02 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 09 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 155013.6021297585}, "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": ["Saudi Arabia", "Yemen"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia"]}, "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": 15.0}, "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": 45.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "45.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 43.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[42.957, 15.5], [42.75, 16.0], [42.957, 16.5], [42.75, 17.0], [42.854, 17.25], [42.823, 17.323], [42.47, 17.47], [42.25, 18.0], [42.47, 18.53], [42.823, 18.677], [42.97, 19.03], [43.5, 19.25], [44.03, 19.03], [44.25, 18.5], [44.146, 18.25], [44.177, 18.177], [44.53, 18.03], [44.75, 17.5], [44.646, 17.25], [44.677, 17.177], [45.03, 17.03], [45.177, 16.677], [45.53, 16.53], [45.677, 16.177], [45.75, 16.146], [46.0, 16.25], [46.25, 16.146], [46.5, 16.25], [46.75, 16.146], [46.751, 16.146], [46.823, 16.177], [46.97, 16.53], [47.5, 16.75], [48.03, 16.53], [48.177, 16.177], [48.53, 16.03], [48.677, 15.677], [49.03, 15.53], [49.25, 15.0], [49.146, 14.75], [49.25, 14.5], [49.03, 13.97], [48.5, 13.75], [47.97, 13.97], [47.823, 14.323], [47.799, 14.333], [47.75, 14.354], [47.749, 14.354], [47.677, 14.323], [47.646, 14.251], [47.646, 14.25], [47.75, 14.0], [47.53, 13.47], [47.0, 13.25], [46.75, 13.354], [46.5, 13.25], [46.251, 13.354], [46.25, 13.354], [46.177, 13.323], [46.03, 12.97], [45.5, 12.75], [45.25, 12.854], [45.0, 12.75], [44.75, 12.854], [44.5, 12.75], [44.0, 12.957], [43.5, 12.75], [42.97, 12.97], [42.75, 13.5], [42.854, 13.75], [42.75, 14.0], [42.957, 14.5], [42.75, 15.0], [42.957, 15.5]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-05-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[42.85355339059328, 13.75], [42.75, 14.0], [42.95710678118655, 14.5], [42.75, 15.0], [42.96966991411009, 15.530330085889911], [43.5, 15.75], [44.03033008588991, 15.530330085889911], [44.25, 15.0], [44.04289321881345, 14.5], [44.25, 14.0], [44.14644660940672, 13.75], [44.25, 13.5], [44.03033008588991, 12.969669914110089], [43.5, 12.75], [42.96966991411009, 12.969669914110089], [42.75, 13.5], [42.85355339059328, 13.75]]]}, "2020-05-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[42.85355339059328, 13.75], [42.75, 14.0], [42.95710678118655, 14.5], [42.75, 15.0], [42.96966991411009, 15.530330085889911], [43.5, 15.75], [44.03033008588991, 15.530330085889911], [44.25, 15.0], [44.04289321881345, 14.5], [44.25, 14.0], [44.14644660940672, 13.75], [44.25, 13.5], [44.03033008588991, 12.969669914110089], [43.5, 12.75], [42.96966991411009, 12.969669914110089], [42.75, 13.5], [42.85355339059328, 13.75]]]}, "2020-05-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[42.82322330470336, 17.32322330470336], [42.46966991411009, 17.46966991411009], [42.25, 18.0], [42.46966991411009, 18.53033008588991], [42.82322330470336, 18.67677669529664], [42.96966991411009, 19.03033008588991], [43.5, 19.25], [44.03033008588991, 19.03033008588991], [44.25, 18.5], [44.14644660940672, 18.25], [44.17677669529664, 18.17677669529664], [44.53033008588991, 18.03033008588991], [44.75, 17.5], [44.64644660940672, 17.25], [44.67677669529664, 17.17677669529664], [45.03033008588991, 17.03033008588991], [45.17677669529664, 16.67677669529664], [45.53033008588991, 16.53033008588991], [45.67677669529664, 16.17677669529664], [45.75, 16.146446609406727], [46.0, 16.25], [46.25, 16.146446609406727], [46.5, 16.25], [46.80177669529664, 16.125], [46.96966991411009, 16.53033008588991], [47.5, 16.75], [48.03033008588991, 16.53033008588991], [48.25, 16.0], [48.03033008588991, 15.469669914110089], [47.625, 15.301776695296637], [47.75, 15.0], [47.54289321881345, 14.5], [47.75, 14.0], [47.53033008588991, 13.469669914110089], [47.0, 13.25], [46.75, 13.353553390593275], [46.5, 13.25], [45.96966991411009, 13.469669914110089], [45.82322330470336, 13.823223304703363], [45.75, 13.853553390593275], [45.67677669529664, 13.823223304703363], [45.64644660940672, 13.75], [45.75, 13.5], [45.53033008588991, 12.969669914110089], [45.0, 12.75], [44.75, 12.853553390593275], [44.5, 12.75], [44.0, 12.957106781186548], [43.5, 12.75], [42.96966991411009, 12.969669914110089], [42.75, 13.5], [42.85355339059328, 13.75], [42.75, 14.0], [42.95710678118655, 14.5], [42.75, 15.0], [42.96966991411009, 15.530330085889911], [43.32322330470336, 15.676776695296637], [43.35355339059328, 15.75], [43.25, 16.0], [43.35355339059328, 16.25], [43.32322330470336, 16.32322330470336], [42.96966991411009, 16.46966991411009], [42.75, 17.0], [42.85355339059328, 17.25], [42.82322330470336, 17.32322330470336]]]}, "2020-05-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[42.82322330470336, 17.32322330470336], [42.46966991411009, 17.46966991411009], [42.25, 18.0], [42.46966991411009, 18.53033008588991], [42.82322330470336, 18.67677669529664], [42.96966991411009, 19.03033008588991], [43.5, 19.25], [44.03033008588991, 19.03033008588991], [44.25, 18.5], [44.14644660940672, 18.25], [44.17677669529664, 18.17677669529664], [44.53033008588991, 18.03033008588991], [44.75, 17.5], [44.64644660940672, 17.25], [44.67677669529664, 17.17677669529664], [45.03033008588991, 17.03033008588991], [45.17677669529664, 16.67677669529664], [45.53033008588991, 16.53033008588991], [45.67677669529664, 16.17677669529664], [45.75, 16.146446609406727], [46.0, 16.25], [46.25, 16.146446609406727], [46.5, 16.25], [46.75, 16.146446609406727], [46.82322330470336, 16.17677669529664], [46.96966991411009, 16.53033008588991], [47.5, 16.75], [48.03033008588991, 16.53033008588991], [48.17677669529664, 16.17677669529664], [48.53033008588991, 16.03033008588991], [48.67677669529664, 15.676776695296637], [49.03033008588991, 15.530330085889911], [49.25, 15.0], [49.14644660940672, 14.75], [49.25, 14.5], [49.03033008588991, 13.969669914110089], [48.5, 13.75], [47.96966991411009, 13.969669914110089], [47.82322330470336, 14.323223304703363], [47.75, 14.353553390593275], [47.67677669529664, 14.323223304703363], [47.64644660940672, 14.25], [47.75, 14.0], [47.53033008588991, 13.469669914110089], [47.0, 13.25], [46.75, 13.353553390593275], [46.5, 13.25], [46.25, 13.353553390593275], [46.17677669529664, 13.323223304703363], [46.03033008588991, 12.969669914110089], [45.5, 12.75], [45.25, 12.853553390593275], [45.0, 12.75], [44.75, 12.853553390593275], [44.5, 12.75], [43.96966991411009, 12.969669914110089], [43.75, 13.5], [43.875, 13.801776695296637], [43.46966991411009, 13.969669914110089], [43.32322330470336, 14.323223304703363], [42.96966991411009, 14.469669914110089], [42.75, 15.0], [42.95710678118655, 15.5], [42.75, 16.0], [42.95710678118655, 16.5], [42.75, 17.0], [42.85355339059328, 17.25], [42.82322330470336, 17.32322330470336]]]}, "2020-05-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[42.82322330470336, 17.32322330470336], [42.46966991411009, 17.46966991411009], [42.25, 18.0], [42.46966991411009, 18.53033008588991], [42.82322330470336, 18.67677669529664], [42.96966991411009, 19.03033008588991], [43.5, 19.25], [44.03033008588991, 19.03033008588991], [44.25, 18.5], [44.14644660940672, 18.25], [44.17677669529664, 18.17677669529664], [44.53033008588991, 18.03033008588991], [44.75, 17.5], [44.64644660940672, 17.25], [44.67677669529664, 17.17677669529664], [45.03033008588991, 17.03033008588991], [45.17677669529664, 16.67677669529664], [45.53033008588991, 16.53033008588991], [45.67677669529664, 16.17677669529664], [45.75, 16.146446609406727], [46.0, 16.25], [46.25, 16.146446609406727], [46.5, 16.25], [46.75, 16.146446609406727], [46.82322330470336, 16.17677669529664], [46.96966991411009, 16.53033008588991], [47.5, 16.75], [48.03033008588991, 16.53033008588991], [48.17677669529664, 16.17677669529664], [48.53033008588991, 16.03033008588991], [48.67677669529664, 15.676776695296637], [49.03033008588991, 15.530330085889911], [49.25, 15.0], [49.14644660940672, 14.75], [49.25, 14.5], [49.03033008588991, 13.969669914110089], [48.5, 13.75], [47.96966991411009, 13.969669914110089], [47.82322330470336, 14.323223304703363], [47.75, 14.353553390593275], [47.67677669529664, 14.323223304703363], [47.64644660940672, 14.25], [47.75, 14.0], [47.53033008588991, 13.469669914110089], [47.0, 13.25], [46.75, 13.353553390593275], [46.5, 13.25], [46.25, 13.353553390593275], [46.17677669529664, 13.323223304703363], [46.03033008588991, 12.969669914110089], [45.5, 12.75], [45.25, 12.853553390593275], [45.0, 12.75], [44.75, 12.853553390593275], [44.5, 12.75], [43.96966991411009, 12.969669914110089], [43.75, 13.5], [43.875, 13.801776695296637], [43.46966991411009, 13.969669914110089], [43.25, 14.5], [43.35355339059328, 14.75], [43.25, 15.0], [43.35355339059328, 15.25], [43.32322330470336, 15.323223304703363], [42.96966991411009, 15.469669914110089], [42.75, 16.0], [42.95710678118655, 16.5], [42.75, 17.0], [42.85355339059328, 17.25], [42.82322330470336, 17.32322330470336]]]}, "2020-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.35355339059328, 14.25], [44.25, 14.5], [44.35355339059328, 14.75], [44.25, 15.0], [44.46966991411009, 15.530330085889911], [44.82322330470336, 15.676776695296637], [44.96966991411009, 16.03033008588991], [45.5, 16.25], [45.75, 16.146446609406727], [46.0, 16.25], [46.25, 16.146446609406727], [46.5, 16.25], [46.75, 16.146446609406727], [46.82322330470336, 16.17677669529664], [46.96966991411009, 16.53033008588991], [47.5, 16.75], [48.03033008588991, 16.53033008588991], [48.17677669529664, 16.17677669529664], [48.53033008588991, 16.03033008588991], [48.67677669529664, 15.676776695296637], [49.03033008588991, 15.530330085889911], [49.25, 15.0], [49.14644660940672, 14.75], [49.25, 14.5], [49.03033008588991, 13.969669914110089], [48.5, 13.75], [47.96966991411009, 13.969669914110089], [47.82322330470336, 14.323223304703363], [47.75, 14.353553390593275], [47.67677669529664, 14.323223304703363], [47.64644660940672, 14.25], [47.75, 14.0], [47.53033008588991, 13.469669914110089], [47.0, 13.25], [46.75, 13.353553390593275], [46.5, 13.25], [46.25, 13.353553390593275], [46.17677669529664, 13.323223304703363], [46.03033008588991, 12.969669914110089], [45.5, 12.75], [45.25, 12.853553390593275], [45.0, 12.75], [44.75, 12.853553390593275], [44.5, 12.75], [43.96966991411009, 12.969669914110089], [43.75, 13.5], [43.96966991411009, 14.030330085889911], [44.32322330470336, 14.176776695296637], [44.35355339059328, 14.25]]], [[[44.03033008588991, 15.469669914110089], [43.5, 15.25], [42.96966991411009, 15.469669914110089], [42.75, 16.0], [42.96966991411009, 16.53033008588991], [43.5, 16.75], [44.03033008588991, 16.53033008588991], [44.25, 16.0], [44.03033008588991, 15.469669914110089]]]]}, "2020-05-08T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[44.85355339059328, 15.25], [44.75, 15.5], [44.96966991411009, 16.03033008588991], [45.5, 16.25], [45.75, 16.146446609406727], [46.0, 16.25], [46.25, 16.146446609406727], [46.5, 16.25], [46.75, 16.146446609406727], [46.82322330470336, 16.17677669529664], [46.96966991411009, 16.53033008588991], [47.5, 16.75], [48.03033008588991, 16.53033008588991], [48.17677669529664, 16.17677669529664], [48.53033008588991, 16.03033008588991], [48.67677669529664, 15.676776695296637], [49.03033008588991, 15.530330085889911], [49.25, 15.0], [49.03033008588991, 14.469669914110089], [48.5, 14.25], [48.25, 14.353553390593275], [48.0, 14.25], [47.69822330470336, 14.375], [47.53033008588991, 13.969669914110089], [47.0, 13.75], [46.75, 13.853553390593275], [46.67677669529664, 13.823223304703363], [46.53033008588991, 13.469669914110089], [46.17677669529664, 13.323223304703363], [46.03033008588991, 12.969669914110089], [45.5, 12.75], [45.25, 12.853553390593275], [45.0, 12.75], [44.46966991411009, 12.969669914110089], [44.25, 13.5], [44.46966991411009, 14.030330085889911], [45.0, 14.25], [45.25, 14.146446609406725], [45.32322330470336, 14.176776695296637], [45.35355339059328, 14.25], [45.32322330470336, 14.323223304703363], [44.96966991411009, 14.469669914110089], [44.75, 15.0], [44.85355339059328, 15.25]]]}, "2020-05-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[45.32322330470336, 14.323223304703363], [44.96966991411009, 14.469669914110089], [44.75, 15.0], [44.96966991411009, 15.530330085889911], [45.5, 15.75], [45.75, 15.646446609406725], [46.0, 15.75], [46.53033008588991, 15.530330085889911], [46.75, 15.0], [46.64644660940672, 14.75], [46.75, 14.5], [46.53033008588991, 13.969669914110089], [46.0, 13.75], [45.46966991411009, 13.969669914110089], [45.32322330470336, 14.323223304703363]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.817974363813619}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.340875993780705}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.893184208690116, 27.905864887230678, 22.8752812017039, 22.744689390305496, 23.345119391404296, 25.321802800196167, 26.54236648160952, 26.638710250763893]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.576193983720202, 26.66315839025458, 15.098614388633166, 16.04575148950306, 16.314159185278584, 20.418315587990094, 22.20386471261361, 24.690217016087217]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.407278528144616, -2.391964106461463, -2.622006367629379, -2.7834356880025486, -2.198853225306745, -1.892762810557021, -1.7292514384180502, -1.6240736319234277]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8533714109929065, -2.6396327409911464, -4.15565407765564, -4.817974363813619, -3.0267759685523288, -2.5321237070514826, -2.0519239075615587, -1.7522296668173567]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7274001805855856, -1.7194603831436754, -2.0091992272009076, -2.259046619333293, -1.8284386553551695, -1.682576013966019, -1.6139377129026216, -1.6776820123222833]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0025418326308295, -1.8349095200993408, -3.230331244394402, -3.6181245173613736, -2.512661643352707, -2.177795834251043, -1.8643820891425686, -1.8083674489297397]}}