{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:11.523695", "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-Nov-02_to_2020-Nov-05_258.5_22.0"}, "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": 2020110000147}, "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": "November 02 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 05 2020"}, "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": 66834.46358141863}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 22.0}, "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": 258.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 263.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-97.0, 18.25], [-96.47, 18.03], [-96.25, 17.5], [-96.354, 17.25], [-96.25, 17.0], [-96.47, 16.47], [-97.0, 16.25], [-97.25, 16.354], [-97.5, 16.25], [-98.03, 16.47], [-98.177, 16.823], [-98.53, 16.97], [-98.677, 17.323], [-99.03, 17.47], [-99.177, 17.823], [-99.53, 17.97], [-99.75, 18.5], [-99.53, 19.03], [-99.0, 19.25], [-98.698, 19.125], [-98.625, 19.302], [-99.03, 19.47], [-99.177, 19.823], [-99.25, 19.854], [-99.251, 19.854], [-99.5, 19.75], [-99.749, 19.854], [-99.75, 19.854], [-100.0, 19.75], [-100.25, 19.854], [-100.5, 19.75], [-101.03, 19.97], [-101.177, 20.323], [-101.53, 20.47], [-101.677, 20.823], [-102.03, 20.97], [-102.25, 21.5], [-102.146, 21.75], [-102.25, 22.0], [-102.146, 22.25], [-102.25, 22.5], [-102.03, 23.03], [-101.5, 23.25], [-100.97, 23.03], [-100.823, 22.677], [-100.47, 22.53], [-100.323, 22.177], [-99.97, 22.03], [-99.75, 21.5], [-99.875, 21.198], [-99.75, 21.146], [-99.5, 21.25], [-99.251, 21.146], [-99.25, 21.146], [-99.0, 21.25], [-98.75, 21.146], [-98.5, 21.25], [-97.97, 21.03], [-97.823, 20.677], [-97.47, 20.53], [-97.323, 20.177], [-96.97, 20.03], [-96.75, 19.5], [-96.97, 18.97], [-97.323, 18.823], [-97.354, 18.75], [-97.354, 18.749], [-97.25, 18.5], [-97.427, 18.073], [-97.0, 18.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America", "S.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-11-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-102.14644660940672, 21.75], [-102.25, 22.0], [-102.14644660940672, 22.25], [-102.25, 22.5], [-102.03033008588989, 23.03033008588991], [-101.5, 23.25], [-100.96966991411011, 23.03033008588991], [-100.75, 22.5], [-100.85355339059328, 22.25], [-100.75, 22.0], [-100.85355339059328, 21.75], [-100.82322330470339, 21.67677669529664], [-100.46966991411011, 21.53033008588991], [-100.32322330470339, 21.17677669529664], [-100.25, 21.146446609406723], [-100.0, 21.25], [-99.75, 21.146446609406723], [-99.5, 21.25], [-99.25, 21.146446609406723], [-99.0, 21.25], [-98.46966991411011, 21.03033008588991], [-98.32322330470339, 20.67677669529664], [-98.25, 20.646446609406723], [-98.0, 20.75], [-97.46966991411011, 20.53033008588991], [-97.32322330470339, 20.17677669529664], [-96.96966991411011, 20.03033008588991], [-96.75, 19.5], [-96.96966991411011, 18.96966991411009], [-97.32322330470339, 18.82322330470336], [-97.46966991411011, 18.46966991411009], [-98.0, 18.25], [-98.53033008588989, 18.46966991411009], [-98.75, 19.0], [-98.625, 19.301776695296635], [-99.03033008588989, 19.46966991411009], [-99.17677669529661, 19.82322330470336], [-99.25, 19.853553390593277], [-99.5, 19.75], [-99.75, 19.853553390593277], [-100.0, 19.75], [-100.25, 19.853553390593277], [-100.5, 19.75], [-101.03033008588989, 19.96966991411009], [-101.17677669529661, 20.32322330470336], [-101.53033008588989, 20.46966991411009], [-101.67677669529661, 20.82322330470336], [-102.03033008588989, 20.96966991411009], [-102.25, 21.5], [-102.14644660940672, 21.75]]]}, "2020-11-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-102.14644660940672, 21.75], [-102.25, 22.0], [-102.14644660940672, 22.25], [-102.25, 22.5], [-102.03033008588989, 23.03033008588991], [-101.5, 23.25], [-100.96966991411011, 23.03033008588991], [-100.82322330470339, 22.67677669529664], [-100.46966991411011, 22.53033008588991], [-100.32322330470339, 22.17677669529664], [-99.96966991411011, 22.03033008588991], [-99.75, 21.5], [-99.875, 21.198223304703365], [-99.75, 21.146446609406723], [-99.5, 21.25], [-99.25, 21.146446609406723], [-99.0, 21.25], [-98.75, 21.146446609406723], [-98.5, 21.25], [-97.96966991411011, 21.03033008588991], [-97.82322330470339, 20.67677669529664], [-97.46966991411011, 20.53033008588991], [-97.32322330470339, 20.17677669529664], [-96.96966991411011, 20.03033008588991], [-96.75, 19.5], [-96.96966991411011, 18.96966991411009], [-97.32322330470339, 18.82322330470336], [-97.35355339059328, 18.75], [-97.25, 18.5], [-97.42677669529667, 18.073223304703344], [-97.0, 18.25], [-96.46966991411011, 18.03033008588991], [-96.25, 17.5], [-96.35355339059328, 17.25], [-96.25, 17.0], [-96.46966991411011, 16.46966991411009], [-97.0, 16.25], [-97.25, 16.353553390593277], [-97.5, 16.25], [-98.03033008588989, 16.46966991411009], [-98.17677669529661, 16.82322330470336], [-98.53033008588989, 16.96966991411009], [-98.67677669529661, 17.32322330470336], [-99.03033008588989, 17.46966991411009], [-99.17677669529661, 17.82322330470336], [-99.53033008588989, 17.96966991411009], [-99.75, 18.5], [-99.53033008588989, 19.03033008588991], [-99.0, 19.25], [-98.69822330470333, 19.124999999999993], [-98.625, 19.301776695296635], [-99.03033008588989, 19.46966991411009], [-99.17677669529661, 19.82322330470336], [-99.25, 19.853553390593277], [-99.5, 19.75], [-99.75, 19.853553390593277], [-100.0, 19.75], [-100.25, 19.853553390593277], [-100.5, 19.75], [-101.03033008588989, 19.96966991411009], [-101.17677669529661, 20.32322330470336], [-101.53033008588989, 20.46966991411009], [-101.67677669529661, 20.82322330470336], [-102.03033008588989, 20.96966991411009], [-102.25, 21.5], [-102.14644660940672, 21.75]]]}, "2020-11-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-102.14644660940672, 21.75], [-102.25, 22.0], [-102.14644660940672, 22.25], [-102.25, 22.5], [-102.03033008588989, 23.03033008588991], [-101.5, 23.25], [-100.96966991411011, 23.03033008588991], [-100.82322330470339, 22.67677669529664], [-100.46966991411011, 22.53033008588991], [-100.32322330470339, 22.17677669529664], [-99.96966991411011, 22.03033008588991], [-99.75, 21.5], [-99.875, 21.198223304703365], [-99.75, 21.146446609406723], [-99.5, 21.25], [-99.25, 21.146446609406723], [-99.0, 21.25], [-98.75, 21.146446609406723], [-98.5, 21.25], [-97.96966991411011, 21.03033008588991], [-97.82322330470339, 20.67677669529664], [-97.46966991411011, 20.53033008588991], [-97.32322330470339, 20.17677669529664], [-96.96966991411011, 20.03033008588991], [-96.75, 19.5], [-96.96966991411011, 18.96966991411009], [-97.32322330470339, 18.82322330470336], [-97.35355339059328, 18.75], [-97.25, 18.5], [-97.42677669529667, 18.073223304703344], [-97.0, 18.25], [-96.46966991411011, 18.03033008588991], [-96.25, 17.5], [-96.35355339059328, 17.25], [-96.25, 17.0], [-96.46966991411011, 16.46966991411009], [-97.0, 16.25], [-97.25, 16.353553390593277], [-97.5, 16.25], [-98.03033008588989, 16.46966991411009], [-98.17677669529661, 16.82322330470336], [-98.53033008588989, 16.96966991411009], [-98.67677669529661, 17.32322330470336], [-99.03033008588989, 17.46966991411009], [-99.17677669529661, 17.82322330470336], [-99.53033008588989, 17.96966991411009], [-99.75, 18.5], [-99.53033008588989, 19.03033008588991], [-99.0, 19.25], [-98.69822330470333, 19.124999999999993], [-98.625, 19.301776695296635], [-99.03033008588989, 19.46966991411009], [-99.17677669529661, 19.82322330470336], [-99.25, 19.853553390593277], [-99.5, 19.75], [-99.75, 19.853553390593277], [-100.0, 19.75], [-100.25, 19.853553390593277], [-100.5, 19.75], [-101.03033008588989, 19.96966991411009], [-101.17677669529661, 20.32322330470336], [-101.53033008588989, 20.46966991411009], [-101.67677669529661, 20.82322330470336], [-102.03033008588989, 20.96966991411009], [-102.25, 21.5], [-102.14644660940672, 21.75]]]}, "2020-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.46966991411011, 19.03033008588991], [-97.25, 18.5], [-97.42677669529667, 18.073223304703344], [-97.0, 18.25], [-96.46966991411011, 18.03033008588991], [-96.25, 17.5], [-96.35355339059328, 17.25], [-96.25, 17.0], [-96.46966991411011, 16.46966991411009], [-97.0, 16.25], [-97.25, 16.353553390593277], [-97.5, 16.25], [-98.03033008588989, 16.46966991411009], [-98.17677669529661, 16.82322330470336], [-98.53033008588989, 16.96966991411009], [-98.67677669529661, 17.32322330470336], [-99.03033008588989, 17.46966991411009], [-99.17677669529661, 17.82322330470336], [-99.53033008588989, 17.96966991411009], [-99.75, 18.5], [-99.53033008588989, 19.03033008588991], [-99.0, 19.25], [-98.5, 19.042893218813443], [-98.0, 19.25], [-97.46966991411011, 19.03033008588991]]], [[[-102.03033008588989, 21.46966991411009], [-102.25, 22.0], [-102.03033008588989, 22.53033008588991], [-101.5, 22.75], [-101.25, 22.646446609406723], [-101.0, 22.75], [-100.46966991411011, 22.53033008588991], [-100.32322330470339, 22.17677669529664], [-99.96966991411011, 22.03033008588991], [-99.75, 21.5], [-99.875, 21.198223304703365], [-99.5, 21.042893218813443], [-99.0, 21.25], [-98.75, 21.146446609406723], [-98.5, 21.25], [-97.96966991411011, 21.03033008588991], [-97.82322330470339, 20.67677669529664], [-97.46966991411011, 20.53033008588991], [-97.25, 20.0], [-97.46966991411011, 19.46966991411009], [-98.0, 19.25], [-98.25, 19.353553390593277], [-98.5, 19.25], [-99.03033008588989, 19.46966991411009], [-99.17677669529661, 19.82322330470336], [-99.5, 19.957106781186557], [-100.0, 19.75], [-100.25, 19.853553390593277], [-100.5, 19.75], [-101.03033008588989, 19.96966991411009], [-101.17677669529661, 20.32322330470336], [-101.53033008588989, 20.46966991411009], [-101.75, 21.0], [-101.64644660940672, 21.25], [-101.67677669529661, 21.32322330470336], [-102.03033008588989, 21.46966991411009]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.2732011702876775}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1391816755491444}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.768064937489783, 12.726589529306068, 12.907357721910557, 13.358044443670565]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.88363583799412, 8.635022419979407, 9.167977323131424, 9.141012744171064]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1727900245098133, -3.338412392979938, -3.071623392740788, -2.9485279986689172]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7445128719921854, -4.2732011702876775, -3.7034785811105735, -3.901871468587842]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5884390156128487, -1.728980433727927, -1.5954130827397945, -1.4996174855112294]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8195806455950965, -2.010896553455034, -1.9079445437907583, -1.8683704095976224]}}