{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:55.291785", "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-Dec-30_to_2021-Jan-04_27.0_-13.5"}, "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": 2020120001215}, "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": "December 30 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 04 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 57183.99911576109}, "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": ["Zambia"]}, "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": []}, "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": -13.5}, "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": 27.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[27.5, -12.25], [28.03, -12.47], [28.177, -12.823], [28.53, -12.97], [28.75, -13.5], [28.53, -14.03], [28.177, -14.177], [28.146, -14.25], [28.25, -14.5], [28.03, -15.03], [27.5, -15.25], [26.97, -15.03], [26.75, -14.5], [26.854, -14.25], [26.823, -14.177], [26.75, -14.146], [26.677, -14.177], [26.53, -14.53], [26.0, -14.75], [25.75, -14.646], [25.5, -14.75], [24.97, -14.53], [24.75, -14.0], [24.854, -13.75], [24.75, -13.5], [24.875, -13.198], [24.47, -13.03], [24.25, -12.5], [24.47, -11.97], [24.823, -11.823], [24.97, -11.47], [25.5, -11.25], [25.75, -11.354], [26.0, -11.25], [26.25, -11.354], [26.5, -11.25], [27.03, -11.47], [27.25, -12.0], [27.146, -12.25], [27.198, -12.375], [27.5, -12.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[26.75, -14.146446609406727], [26.5, -14.25], [25.96966991411009, -14.030330085889911], [25.75, -13.5], [25.96966991411009, -12.969669914110089], [26.5, -12.75], [26.75, -12.853553390593273], [27.0, -12.75], [27.25, -12.853553390593273], [27.5, -12.75], [27.75, -12.853553390593273], [28.0, -12.75], [28.53033008588991, -12.969669914110089], [28.75, -13.5], [28.53033008588991, -14.030330085889911], [28.0, -14.25], [27.75, -14.146446609406727], [27.5, -14.25], [27.25, -14.146446609406727], [27.0, -14.25], [26.75, -14.146446609406727]]]}, "2020-12-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[26.75, -14.146446609406727], [26.5, -14.25], [25.96966991411009, -14.030330085889911], [25.75, -13.5], [25.96966991411009, -12.969669914110089], [26.5, -12.75], [26.75, -12.853553390593273], [27.0, -12.75], [27.25, -12.853553390593273], [27.5, -12.75], [27.75, -12.853553390593273], [28.0, -12.75], [28.53033008588991, -12.969669914110089], [28.75, -13.5], [28.53033008588991, -14.030330085889911], [28.17677669529664, -14.176776695296637], [28.146446609406727, -14.25], [28.25, -14.5], [28.03033008588991, -15.030330085889911], [27.5, -15.25], [26.96966991411009, -15.030330085889911], [26.75, -14.5], [26.853553390593273, -14.25], [26.82322330470336, -14.176776695296637], [26.75, -14.146446609406727]]]}, "2021-01-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[26.75, -14.146446609406727], [26.5, -14.25], [25.96966991411009, -14.030330085889911], [25.75, -13.5], [25.96966991411009, -12.969669914110089], [26.5, -12.75], [26.75, -12.853553390593273], [26.82322330470336, -12.823223304703363], [26.96966991411009, -12.469669914110089], [27.5, -12.25], [28.03033008588991, -12.469669914110089], [28.17677669529664, -12.823223304703363], [28.53033008588991, -12.969669914110089], [28.75, -13.5], [28.53033008588991, -14.030330085889911], [28.17677669529664, -14.176776695296637], [28.146446609406727, -14.25], [28.25, -14.5], [28.03033008588991, -15.030330085889911], [27.5, -15.25], [26.96966991411009, -15.030330085889911], [26.75, -14.5], [26.853553390593273, -14.25], [26.82322330470336, -14.176776695296637], [26.75, -14.146446609406727]]]}, "2021-01-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.82322330470336, -11.823223304703363], [24.96966991411009, -11.469669914110089], [25.5, -11.25], [25.75, -11.353553390593273], [26.0, -11.25], [26.25, -11.353553390593273], [26.5, -11.25], [27.03033008588991, -11.469669914110089], [27.25, -12.0], [27.146446609406727, -12.25], [27.19822330470336, -12.375], [27.5, -12.25], [28.03033008588991, -12.469669914110089], [28.17677669529664, -12.823223304703363], [28.53033008588991, -12.969669914110089], [28.75, -13.5], [28.53033008588991, -14.030330085889911], [28.17677669529664, -14.176776695296637], [28.146446609406727, -14.25], [28.25, -14.5], [28.03033008588991, -15.030330085889911], [27.5, -15.25], [26.96966991411009, -15.030330085889911], [26.75, -14.5], [26.853553390593273, -14.25], [26.82322330470336, -14.176776695296637], [26.75, -14.146446609406727], [26.67677669529664, -14.176776695296637], [26.53033008588991, -14.530330085889911], [26.0, -14.75], [25.75, -14.646446609406727], [25.5, -14.75], [24.96966991411009, -14.530330085889911], [24.75, -14.0], [24.853553390593273, -13.75], [24.75, -13.5], [24.875, -13.198223304703363], [24.46966991411009, -13.030330085889911], [24.25, -12.5], [24.46966991411009, -11.969669914110089], [24.82322330470336, -11.823223304703363]]]}, "2021-01-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.82322330470336, -11.823223304703363], [24.96966991411009, -11.469669914110089], [25.5, -11.25], [25.75, -11.353553390593273], [26.0, -11.25], [26.25, -11.353553390593273], [26.5, -11.25], [27.03033008588991, -11.469669914110089], [27.25, -12.0], [27.146446609406727, -12.25], [27.19822330470336, -12.375], [27.5, -12.25], [28.03033008588991, -12.469669914110089], [28.17677669529664, -12.823223304703363], [28.53033008588991, -12.969669914110089], [28.75, -13.5], [28.53033008588991, -14.030330085889911], [28.17677669529664, -14.176776695296637], [28.146446609406727, -14.25], [28.25, -14.5], [28.03033008588991, -15.030330085889911], [27.5, -15.25], [26.96966991411009, -15.030330085889911], [26.75, -14.5], [26.853553390593273, -14.25], [26.82322330470336, -14.176776695296637], [26.75, -14.146446609406727], [26.67677669529664, -14.176776695296637], [26.53033008588991, -14.530330085889911], [26.0, -14.75], [25.75, -14.646446609406727], [25.5, -14.75], [24.96966991411009, -14.530330085889911], [24.75, -14.0], [24.853553390593273, -13.75], [24.75, -13.5], [24.875, -13.198223304703363], [24.46966991411009, -13.030330085889911], [24.25, -12.5], [24.46966991411009, -11.969669914110089], [24.82322330470336, -11.823223304703363]]]}, "2021-01-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[24.82322330470336, -11.823223304703363], [24.96966991411009, -11.469669914110089], [25.5, -11.25], [25.75, -11.353553390593273], [26.0, -11.25], [26.25, -11.353553390593273], [26.5, -11.25], [27.03033008588991, -11.469669914110089], [27.25, -12.0], [27.146446609406727, -12.25], [27.25, -12.5], [27.146446609406727, -12.75], [27.25, -13.0], [27.03033008588991, -13.530330085889911], [26.67677669529664, -13.676776695296637], [26.646446609406727, -13.75], [26.75, -14.0], [26.53033008588991, -14.530330085889911], [26.0, -14.75], [25.75, -14.646446609406727], [25.5, -14.75], [24.96966991411009, -14.530330085889911], [24.75, -14.0], [24.853553390593273, -13.75], [24.75, -13.5], [24.875, -13.198223304703363], [24.46966991411009, -13.030330085889911], [24.25, -12.5], [24.46966991411009, -11.969669914110089], [24.82322330470336, -11.823223304703363]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.5014958513419288}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6394888266259364}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.992903976659647, 19.811568686894304, 20.517888026681305, 19.744043301802947, 19.942209659336754, 19.75300952326421]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.75736035559595, 19.03977590788162, 20.110283283293768, 18.640362857358355, 18.890065512262936, 18.621223806334513]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6848256274413416, -2.129188435754846, -1.3616307660057518, -1.7288342051809937, -1.536840780696378, -1.5626731804944143]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.785971879048077, -2.5014958513419288, -1.577237576349205, -2.246537918941499, -2.0144297181042816, -1.8591435788474655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7907753311187289, -2.213635828203091, -1.4542784760473049, -1.8198229175970138, -1.6096884477453985, -1.658423820313619]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.895131650028265, -2.6117197013596978, -1.6901424453457508, -2.2485521058304436, -2.0271471020151504, -1.9766389309886816]}}