{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:39.949428", "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-Oct-04_to_2020-Oct-08_48.0_-24.5"}, "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": 2020100000200}, "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": "October 04 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 08 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 82004.70144781686}, "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": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Indian Ocean"]}, "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": -24.5}, "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": 48.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[46.0, -24.25], [45.47, -24.03], [45.25, -23.5], [45.47, -22.97], [45.823, -22.823], [45.97, -22.47], [46.5, -22.25], [46.75, -22.354], [46.823, -22.323], [46.97, -21.97], [47.5, -21.75], [47.749, -21.854], [47.75, -21.854], [47.823, -21.823], [47.97, -21.47], [48.323, -21.323], [48.47, -20.97], [49.0, -20.75], [49.53, -20.97], [49.677, -21.323], [50.03, -21.47], [50.25, -22.0], [50.03, -22.53], [49.5, -22.75], [49.25, -22.646], [49.177, -22.677], [49.03, -23.03], [48.677, -23.177], [48.53, -23.53], [48.177, -23.677], [48.146, -23.75], [48.146, -23.751], [48.177, -23.823], [48.25, -23.854], [48.251, -23.854], [48.5, -23.75], [48.75, -23.854], [49.0, -23.75], [49.53, -23.97], [49.75, -24.5], [49.646, -24.75], [49.75, -25.0], [49.53, -25.53], [49.0, -25.75], [48.75, -25.646], [48.5, -25.75], [48.25, -25.646], [48.0, -25.75], [47.75, -25.646], [47.5, -25.75], [47.25, -25.646], [47.177, -25.677], [47.03, -26.03], [46.5, -26.25], [46.25, -26.146], [46.0, -26.25], [45.47, -26.03], [45.25, -25.5], [45.354, -25.25], [45.25, -25.0], [45.47, -24.47], [46.0, -24.25]], [[46.25, -24.354], [46.323, -24.323], [46.427, -24.073], [46.0, -24.25], [46.25, -24.354]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[46.35355339059328, -24.75], [46.25, -24.5], [46.46966991411009, -23.96966991411009], [46.875, -23.801776695296635], [46.75, -23.5], [46.85355339059328, -23.25], [46.75, -23.0], [46.96966991411009, -22.46966991411009], [47.32322330470336, -22.32322330470336], [47.46966991411009, -21.96966991411009], [47.82322330470336, -21.82322330470336], [47.96966991411009, -21.46966991411009], [48.32322330470336, -21.32322330470336], [48.46966991411009, -20.96966991411009], [49.0, -20.75], [49.53033008588991, -20.96966991411009], [49.67677669529664, -21.32322330470336], [50.03033008588991, -21.46966991411009], [50.25, -22.0], [50.03033008588991, -22.53033008588991], [49.5, -22.75], [49.25, -22.646446609406727], [49.17677669529664, -22.67677669529664], [49.03033008588991, -23.03033008588991], [48.67677669529664, -23.17677669529664], [48.53033008588991, -23.53033008588991], [48.17677669529664, -23.67677669529664], [48.125, -23.801776695296635], [48.25, -23.853553390593273], [48.5, -23.75], [48.75, -23.853553390593273], [49.0, -23.75], [49.53033008588991, -23.96966991411009], [49.75, -24.5], [49.64644660940672, -24.75], [49.75, -25.0], [49.53033008588991, -25.53033008588991], [49.0, -25.75], [48.75, -25.646446609406727], [48.5, -25.75], [48.25, -25.646446609406727], [48.0, -25.75], [47.75, -25.646446609406727], [47.5, -25.75], [47.25, -25.646446609406727], [47.0, -25.75], [46.46966991411009, -25.53033008588991], [46.25, -25.0], [46.35355339059328, -24.75]]]}, "2020-10-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[45.82322330470336, -22.82322330470336], [45.96966991411009, -22.46966991411009], [46.5, -22.25], [46.75, -22.353553390593273], [46.82322330470336, -22.32322330470336], [46.96966991411009, -21.96966991411009], [47.5, -21.75], [47.75, -21.853553390593273], [47.82322330470336, -21.82322330470336], [47.96966991411009, -21.46966991411009], [48.32322330470336, -21.32322330470336], [48.46966991411009, -20.96966991411009], [49.0, -20.75], [49.53033008588991, -20.96966991411009], [49.67677669529664, -21.32322330470336], [50.03033008588991, -21.46966991411009], [50.25, -22.0], [50.03033008588991, -22.53033008588991], [49.5, -22.75], [49.25, -22.646446609406727], [49.17677669529664, -22.67677669529664], [49.03033008588991, -23.03033008588991], [48.67677669529664, -23.17677669529664], [48.53033008588991, -23.53033008588991], [48.17677669529664, -23.67677669529664], [48.125, -23.801776695296635], [48.25, -23.853553390593273], [48.5, -23.75], [48.75, -23.853553390593273], [49.0, -23.75], [49.53033008588991, -23.96966991411009], [49.75, -24.5], [49.64644660940672, -24.75], [49.75, -25.0], [49.53033008588991, -25.53033008588991], [49.0, -25.75], [48.75, -25.646446609406727], [48.5, -25.75], [48.25, -25.646446609406727], [48.0, -25.75], [47.75, -25.646446609406727], [47.5, -25.75], [47.25, -25.646446609406727], [47.17677669529664, -25.67677669529664], [47.03033008588991, -26.03033008588991], [46.5, -26.25], [46.25, -26.146446609406727], [46.0, -26.25], [45.46966991411009, -26.03033008588991], [45.25, -25.5], [45.46966991411009, -24.96966991411009], [46.0, -24.75], [46.25, -24.853553390593273], [46.32322330470336, -24.82322330470336], [46.35355339059328, -24.75], [46.25, -24.5], [46.42677669529664, -24.07322330470336], [46.0, -24.25], [45.46966991411009, -24.03033008588991], [45.25, -23.5], [45.46966991411009, -22.96966991411009], [45.82322330470336, -22.82322330470336]]]}, "2020-10-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[45.35355339059328, -25.25], [45.25, -25.0], [45.46966991411009, -24.46966991411009], [46.0, -24.25], [45.46966991411009, -24.03033008588991], [45.25, -23.5], [45.46966991411009, -22.96966991411009], [45.82322330470336, -22.82322330470336], [45.96966991411009, -22.46966991411009], [46.5, -22.25], [46.75, -22.353553390593273], [46.82322330470336, -22.32322330470336], [46.96966991411009, -21.96966991411009], [47.5, -21.75], [47.75, -21.853553390593273], [47.82322330470336, -21.82322330470336], [47.96966991411009, -21.46966991411009], [48.32322330470336, -21.32322330470336], [48.46966991411009, -20.96966991411009], [49.0, -20.75], [49.53033008588991, -20.96966991411009], [49.67677669529664, -21.32322330470336], [50.03033008588991, -21.46966991411009], [50.25, -22.0], [50.03033008588991, -22.53033008588991], [49.5, -22.75], [49.25, -22.646446609406727], [49.17677669529664, -22.67677669529664], [49.03033008588991, -23.03033008588991], [48.67677669529664, -23.17677669529664], [48.53033008588991, -23.53033008588991], [48.17677669529664, -23.67677669529664], [48.14644660940672, -23.75], [48.17677669529664, -23.82322330470336], [48.25, -23.853553390593273], [48.5, -23.75], [48.75, -23.853553390593273], [49.0, -23.75], [49.53033008588991, -23.96966991411009], [49.75, -24.5], [49.64644660940672, -24.75], [49.75, -25.0], [49.53033008588991, -25.53033008588991], [49.0, -25.75], [48.75, -25.646446609406727], [48.5, -25.75], [48.25, -25.646446609406727], [48.0, -25.75], [47.75, -25.646446609406727], [47.5, -25.75], [47.25, -25.646446609406727], [47.17677669529664, -25.67677669529664], [47.03033008588991, -26.03033008588991], [46.5, -26.25], [46.25, -26.146446609406727], [46.0, -26.25], [45.46966991411009, -26.03033008588991], [45.25, -25.5], [45.35355339059328, -25.25]], [[46.0, -24.25], [46.25, -24.353553390593273], [46.32322330470336, -24.32322330470336], [46.42677669529664, -24.07322330470336], [46.0, -24.25]]]}, "2020-10-07T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[45.35355339059328, -25.25], [45.25, -25.0], [45.46966991411009, -24.46966991411009], [46.0, -24.25], [45.46966991411009, -24.03033008588991], [45.25, -23.5], [45.46966991411009, -22.96966991411009], [45.82322330470336, -22.82322330470336], [45.96966991411009, -22.46966991411009], [46.5, -22.25], [46.75, -22.353553390593273], [46.82322330470336, -22.32322330470336], [46.96966991411009, -21.96966991411009], [47.5, -21.75], [48.03033008588991, -21.96966991411009], [48.17677669529664, -22.32322330470336], [48.53033008588991, -22.46966991411009], [48.75, -23.0], [48.53033008588991, -23.53033008588991], [48.17677669529664, -23.67677669529664], [48.14644660940672, -23.75], [48.17677669529664, -23.82322330470336], [48.25, -23.853553390593273], [48.5, -23.75], [48.75, -23.853553390593273], [49.0, -23.75], [49.53033008588991, -23.96966991411009], [49.75, -24.5], [49.64644660940672, -24.75], [49.75, -25.0], [49.53033008588991, -25.53033008588991], [49.0, -25.75], [48.75, -25.646446609406727], [48.5, -25.75], [48.25, -25.646446609406727], [48.0, -25.75], [47.75, -25.646446609406727], [47.5, -25.75], [47.25, -25.646446609406727], [47.17677669529664, -25.67677669529664], [47.03033008588991, -26.03033008588991], [46.5, -26.25], [46.25, -26.146446609406727], [46.0, -26.25], [45.46966991411009, -26.03033008588991], [45.25, -25.5], [45.35355339059328, -25.25]], [[46.0, -24.25], [46.25, -24.353553390593273], [46.32322330470336, -24.32322330470336], [46.42677669529664, -24.07322330470336], [46.0, -24.25]]]}, "2020-10-08T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[45.35355339059328, -25.25], [45.25, -25.0], [45.46966991411009, -24.46966991411009], [46.0, -24.25], [46.25, -24.353553390593273], [46.32322330470336, -24.32322330470336], [46.46966991411009, -23.96966991411009], [46.82322330470336, -23.82322330470336], [46.85355339059328, -23.75], [46.75, -23.5], [46.85355339059328, -23.25], [46.75, -23.0], [46.96966991411009, -22.46966991411009], [47.5, -22.25], [48.03033008588991, -22.46966991411009], [48.25, -23.0], [48.14644660940672, -23.25], [48.25, -23.5], [48.14644660940672, -23.75], [48.17677669529664, -23.82322330470336], [48.53033008588991, -23.96966991411009], [48.67677669529664, -24.32322330470336], [49.03033008588991, -24.46966991411009], [49.25, -25.0], [49.03033008588991, -25.53033008588991], [48.5, -25.75], [48.25, -25.646446609406727], [48.0, -25.75], [47.75, -25.646446609406727], [47.5, -25.75], [47.25, -25.646446609406727], [47.17677669529664, -25.67677669529664], [47.03033008588991, -26.03033008588991], [46.5, -26.25], [46.25, -26.146446609406727], [46.0, -26.25], [45.46966991411009, -26.03033008588991], [45.25, -25.5], [45.35355339059328, -25.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.00870082382562}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4916504337721395}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.45651852642868, 19.288716736319543, 19.588758296036985, 19.26986250316969, 19.882945781903118]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.264380616635265, 13.145369015694996, 13.822569298617282, 15.073444672274661, 16.0947923755715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.006883703354169, -2.659239722600901, -2.5129385650355247, -2.631254957640638, -2.542208224571482]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.335352629760962, -5.00870082382562, -4.229651136613995, -4.319784432108861, -4.247204548474542]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0331391962392846, -2.2281665687009196, -1.9285263905902184, -1.8373057669120645, -1.7517925710850455]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4643805381852824, -3.191227772939102, -2.6135728957997397, -2.3806992566206406, -1.9618738661963393]}}