{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:23:01.997370", "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-Mar-28_to_2021-Apr-02_33.5_-13.0"}, "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": 2021030001201}, "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": "March 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 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": 243510.4434570375}, "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": ["Malawi", "Mozambique", "Tanzania, United Republic of", "Zambia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "Africa", "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": -13.0}, "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": 33.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "33.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 32.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[35.5, -11.25], [36.0, -11.457], [36.323, -11.323], [36.47, -10.97], [37.0, -10.75], [37.25, -10.854], [37.5, -10.75], [38.03, -10.97], [38.177, -11.323], [38.53, -11.47], [38.677, -11.823], [39.03, -11.97], [39.25, -12.5], [39.146, -12.75], [39.25, -13.0], [39.03, -13.53], [38.625, -13.698], [38.75, -14.0], [38.646, -14.25], [38.677, -14.323], [39.03, -14.47], [39.25, -15.0], [39.146, -15.25], [39.25, -15.5], [39.03, -16.03], [38.677, -16.177], [38.53, -16.53], [38.0, -16.75], [37.47, -16.53], [37.323, -16.177], [37.0, -16.043], [36.5, -16.25], [36.0, -16.043], [35.5, -16.25], [35.25, -16.146], [35.0, -16.25], [34.47, -16.03], [34.25, -15.5], [34.354, -15.25], [34.323, -15.177], [33.97, -15.03], [33.823, -14.677], [33.47, -14.53], [33.323, -14.177], [33.274, -14.156], [33.25, -14.146], [33.249, -14.146], [33.0, -14.25], [32.75, -14.146], [32.5, -14.25], [32.25, -14.146], [32.0, -14.25], [31.47, -14.03], [31.25, -13.5], [31.354, -13.25], [31.25, -13.0], [31.47, -12.47], [31.823, -12.323], [31.875, -12.198], [31.47, -12.03], [31.25, -11.5], [31.47, -10.97], [32.0, -10.75], [32.25, -10.854], [32.5, -10.75], [32.75, -10.854], [32.823, -10.823], [32.97, -10.47], [33.5, -10.25], [34.03, -10.47], [34.177, -10.823], [34.53, -10.97], [34.75, -11.5], [34.646, -11.75], [34.75, -12.0], [34.97, -11.47], [35.5, -11.25]], [[34.646, -12.25], [34.698, -12.375], [34.823, -12.323], [34.844, -12.274], [34.854, -12.25], [34.854, -12.249], [34.75, -12.0], [34.646, -12.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-03-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[32.82322330470336, -13.176776695296637], [32.46966991411009, -13.030330085889911], [32.25, -12.5], [32.46966991411009, -11.969669914110089], [32.82322330470336, -11.823223304703363], [32.85355339059328, -11.75], [32.75, -11.5], [32.96966991411009, -10.969669914110089], [33.5, -10.75], [34.03033008588991, -10.969669914110089], [34.25, -11.5], [34.14644660940672, -11.75], [34.25, -12.0], [34.125, -12.301776695296637], [34.5, -12.457106781186548], [34.82322330470336, -12.323223304703363], [34.96966991411009, -11.969669914110089], [35.5, -11.75], [36.03033008588991, -11.969669914110089], [36.25, -12.5], [36.14644660940672, -12.75], [36.25, -13.0], [36.03033008588991, -13.530330085889911], [35.67677669529664, -13.676776695296637], [35.53033008588991, -14.030330085889911], [35.0, -14.25], [34.5, -14.042893218813452], [34.0, -14.25], [33.75, -14.146446609406725], [33.5, -14.25], [32.96966991411009, -14.030330085889911], [32.75, -13.5], [32.85355339059328, -13.25], [32.82322330470336, -13.176776695296637]]]}, "2021-03-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[32.25, -12.146446609406727], [32.0, -12.25], [31.46966991411009, -12.030330085889911], [31.25, -11.5], [31.46966991411009, -10.969669914110089], [32.0, -10.75], [32.25, -10.853553390593273], [32.5, -10.75], [32.75, -10.853553390593275], [32.82322330470336, -10.823223304703363], [32.96966991411009, -10.469669914110089], [33.5, -10.25], [34.03033008588991, -10.469669914110089], [34.17677669529664, -10.823223304703363], [34.53033008588991, -10.969669914110089], [34.75, -11.5], [34.64644660940672, -11.75], [34.75, -12.0], [34.96966991411009, -11.469669914110089], [35.5, -11.25], [36.0, -11.457106781186548], [36.32322330470336, -11.323223304703363], [36.46966991411009, -10.969669914110089], [37.0, -10.75], [37.25, -10.853553390593275], [37.5, -10.75], [38.03033008588991, -10.969669914110089], [38.17677669529664, -11.323223304703363], [38.53033008588991, -11.469669914110089], [38.75, -12.0], [38.53033008588991, -12.530330085889911], [38.17677669529664, -12.676776695296637], [38.03033008588991, -13.030330085889911], [37.5, -13.25], [37.25, -13.146446609406725], [37.17677669529664, -13.176776695296637], [37.14644660940672, -13.25], [37.17677669529664, -13.323223304703363], [37.53033008588991, -13.469669914110089], [37.75, -14.0], [37.64644660940672, -14.25], [37.67677669529664, -14.323223304703363], [37.75, -14.353553390593275], [38.0, -14.25], [38.53033008588991, -14.469669914110089], [38.75, -15.0], [38.64644660940672, -15.25], [38.75, -15.5], [38.64644660940672, -15.75], [38.75, -16.0], [38.53033008588991, -16.53033008588991], [38.0, -16.75], [37.46966991411009, -16.53033008588991], [37.32322330470336, -16.17677669529664], [37.0, -16.04289321881345], [36.5, -16.25], [35.96966991411009, -16.03033008588991], [35.75, -15.5], [35.85355339059328, -15.25], [35.82322330470336, -15.176776695296637], [35.46966991411009, -15.030330085889911], [35.32322330470336, -14.676776695296637], [34.96966991411009, -14.530330085889911], [34.82322330470336, -14.176776695296637], [34.75, -14.146446609406725], [34.5, -14.25], [34.25, -14.146446609406725], [34.0, -14.25], [33.75, -14.146446609406725], [33.5, -14.25], [32.96966991411009, -14.030330085889911], [32.82322330470336, -13.676776695296637], [32.46966991411009, -13.530330085889911], [32.25, -13.0], [32.35355339059328, -12.75], [32.25, -12.5], [32.375, -12.198223304703363], [32.25, -12.146446609406727]], [[34.75, -12.0], [34.64644660940672, -12.25], [34.69822330470336, -12.375], [34.82322330470336, -12.323223304703363], [34.85355339059328, -12.25], [34.75, -12.0]]]}, "2021-03-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.353553390593273, -13.25], [31.25, -13.0], [31.46966991411009, -12.469669914110089], [31.82322330470336, -12.323223304703363], [31.875, -12.198223304703363], [31.46966991411009, -12.030330085889911], [31.25, -11.5], [31.46966991411009, -10.969669914110089], [32.0, -10.75], [32.25, -10.853553390593273], [32.5, -10.75], [32.75, -10.853553390593275], [32.82322330470336, -10.823223304703363], [32.96966991411009, -10.469669914110089], [33.5, -10.25], [34.03033008588991, -10.469669914110089], [34.17677669529664, -10.823223304703363], [34.53033008588991, -10.969669914110089], [34.75, -11.5], [34.64644660940672, -11.75], [34.75, -12.0], [34.96966991411009, -11.469669914110089], [35.5, -11.25], [36.0, -11.457106781186548], [36.32322330470336, -11.323223304703363], [36.46966991411009, -10.969669914110089], [37.0, -10.75], [37.25, -10.853553390593275], [37.5, -10.75], [38.03033008588991, -10.969669914110089], [38.17677669529664, -11.323223304703363], [38.53033008588991, -11.469669914110089], [38.67677669529664, -11.823223304703363], [39.03033008588991, -11.969669914110089], [39.25, -12.5], [39.14644660940672, -12.75], [39.25, -13.0], [39.03033008588991, -13.530330085889911], [38.625, -13.698223304703363], [38.75, -14.0], [38.64644660940672, -14.25], [38.67677669529664, -14.323223304703363], [39.03033008588991, -14.469669914110089], [39.25, -15.0], [39.14644660940672, -15.25], [39.25, -15.5], [39.03033008588991, -16.03033008588991], [38.67677669529664, -16.17677669529664], [38.53033008588991, -16.53033008588991], [38.0, -16.75], [37.46966991411009, -16.53033008588991], [37.32322330470336, -16.17677669529664], [37.0, -16.04289321881345], [36.5, -16.25], [36.0, -16.04289321881345], [35.5, -16.25], [35.25, -16.146446609406727], [35.0, -16.25], [34.46966991411009, -16.03033008588991], [34.25, -15.5], [34.35355339059328, -15.25], [34.32322330470336, -15.176776695296637], [33.96966991411009, -15.030330085889911], [33.82322330470336, -14.676776695296637], [33.46966991411009, -14.530330085889911], [33.32322330470336, -14.176776695296637], [33.25, -14.146446609406725], [33.0, -14.25], [32.75, -14.146446609406725], [32.5, -14.25], [32.25, -14.146446609406727], [32.0, -14.25], [31.46966991411009, -14.030330085889911], [31.25, -13.5], [31.353553390593273, -13.25]], [[34.75, -12.0], [34.64644660940672, -12.25], [34.69822330470336, -12.375], [34.82322330470336, -12.323223304703363], [34.85355339059328, -12.25], [34.75, -12.0]]]}, "2021-03-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.353553390593273, -13.25], [31.25, -13.0], [31.46966991411009, -12.469669914110089], [31.82322330470336, -12.323223304703363], [31.875, -12.198223304703363], [31.46966991411009, -12.030330085889911], [31.25, -11.5], [31.46966991411009, -10.969669914110089], [32.0, -10.75], [32.25, -10.853553390593273], [32.5, -10.75], [32.75, -10.853553390593275], [32.82322330470336, -10.823223304703363], [32.96966991411009, -10.469669914110089], [33.5, -10.25], [34.03033008588991, -10.469669914110089], [34.17677669529664, -10.823223304703363], [34.53033008588991, -10.969669914110089], [34.75, -11.5], [34.64644660940672, -11.75], [34.75, -12.0], [34.96966991411009, -11.469669914110089], [35.5, -11.25], [36.0, -11.457106781186548], [36.32322330470336, -11.323223304703363], [36.46966991411009, -10.969669914110089], [37.0, -10.75], [37.25, -10.853553390593275], [37.5, -10.75], [38.03033008588991, -10.969669914110089], [38.17677669529664, -11.323223304703363], [38.53033008588991, -11.469669914110089], [38.67677669529664, -11.823223304703363], [39.03033008588991, -11.969669914110089], [39.25, -12.5], [39.14644660940672, -12.75], [39.25, -13.0], [39.03033008588991, -13.530330085889911], [38.625, -13.698223304703363], [38.75, -14.0], [38.64644660940672, -14.25], [38.67677669529664, -14.323223304703363], [39.03033008588991, -14.469669914110089], [39.25, -15.0], [39.14644660940672, -15.25], [39.25, -15.5], [39.03033008588991, -16.03033008588991], [38.67677669529664, -16.17677669529664], [38.53033008588991, -16.53033008588991], [38.0, -16.75], [37.46966991411009, -16.53033008588991], [37.32322330470336, -16.17677669529664], [37.0, -16.04289321881345], [36.5, -16.25], [36.0, -16.04289321881345], [35.5, -16.25], [35.25, -16.146446609406727], [35.0, -16.25], [34.46966991411009, -16.03033008588991], [34.25, -15.5], [34.35355339059328, -15.25], [34.32322330470336, -15.176776695296637], [33.96966991411009, -15.030330085889911], [33.82322330470336, -14.676776695296637], [33.46966991411009, -14.530330085889911], [33.32322330470336, -14.176776695296637], [33.25, -14.146446609406725], [33.0, -14.25], [32.75, -14.146446609406725], [32.5, -14.25], [32.25, -14.146446609406727], [32.0, -14.25], [31.46966991411009, -14.030330085889911], [31.25, -13.5], [31.353553390593273, -13.25]], [[34.75, -12.0], [34.64644660940672, -12.25], [34.69822330470336, -12.375], [34.82322330470336, -12.323223304703363], [34.85355339059328, -12.25], [34.75, -12.0]]]}, "2021-04-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.353553390593273, -13.25], [31.25, -13.0], [31.46966991411009, -12.469669914110089], [31.82322330470336, -12.323223304703363], [31.96966991411009, -11.969669914110089], [32.32322330470336, -11.823223304703362], [32.46966991411009, -11.469669914110089], [33.0, -11.25], [33.53033008588991, -11.469669914110089], [33.67677669529664, -11.823223304703363], [33.75, -11.853553390593275], [34.0, -11.75], [34.53033008588991, -11.969669914110089], [34.69822330470336, -12.375], [34.82322330470336, -12.323223304703363], [34.85355339059328, -12.25], [34.75, -12.0], [34.96966991411009, -11.469669914110089], [35.5, -11.25], [36.0, -11.457106781186548], [36.32322330470336, -11.323223304703363], [36.46966991411009, -10.969669914110089], [37.0, -10.75], [37.25, -10.853553390593275], [37.5, -10.75], [38.03033008588991, -10.969669914110089], [38.17677669529664, -11.323223304703363], [38.53033008588991, -11.469669914110089], [38.67677669529664, -11.823223304703363], [39.03033008588991, -11.969669914110089], [39.25, -12.5], [39.14644660940672, -12.75], [39.25, -13.0], [39.03033008588991, -13.530330085889911], [38.625, -13.698223304703363], [38.75, -14.0], [38.64644660940672, -14.25], [38.67677669529664, -14.323223304703363], [39.03033008588991, -14.469669914110089], [39.25, -15.0], [39.14644660940672, -15.25], [39.25, -15.5], [39.03033008588991, -16.03033008588991], [38.5, -16.25], [37.96966991411009, -16.03033008588991], [37.82322330470336, -15.676776695296637], [37.75, -15.646446609406725], [37.5, -15.75], [36.96966991411009, -15.530330085889911], [36.82322330470336, -15.176776695296637], [36.75, -15.146446609406725], [36.5, -15.25], [36.25, -15.146446609406725], [36.17677669529664, -15.176776695296637], [36.14644660940672, -15.25], [36.25, -15.5], [36.03033008588991, -16.03033008588991], [35.5, -16.25], [35.25, -16.146446609406727], [35.0, -16.25], [34.46966991411009, -16.03033008588991], [34.25, -15.5], [34.35355339059328, -15.25], [34.32322330470336, -15.176776695296637], [33.96966991411009, -15.030330085889911], [33.82322330470336, -14.676776695296637], [33.46966991411009, -14.530330085889911], [33.32322330470336, -14.176776695296637], [33.25, -14.146446609406725], [33.0, -14.25], [32.75, -14.146446609406725], [32.5, -14.25], [32.25, -14.146446609406727], [32.0, -14.25], [31.46966991411009, -14.030330085889911], [31.25, -13.5], [31.353553390593273, -13.25]], [[36.17677669529664, -12.823223304703363], [36.30177669529664, -12.875], [36.35355339059328, -12.75], [36.32322330470336, -12.676776695296637], [36.19822330470336, -12.625], [36.14644660940672, -12.75], [36.17677669529664, -12.823223304703363]]]}, "2021-04-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[32.85355339059328, -13.25], [32.75, -13.0], [32.96966991411009, -12.469669914110089], [33.5, -12.25], [34.03033008588991, -12.469669914110089], [34.25, -13.0], [34.14644660940672, -13.25], [34.17677669529664, -13.323223304703363], [34.53033008588991, -13.469669914110089], [34.67677669529664, -13.823223304703363], [34.75, -13.853553390593275], [34.82322330470336, -13.823223304703363], [34.95710678118655, -13.5], [34.75, -13.0], [34.85355339059328, -12.75], [34.75, -12.5], [34.96966991411009, -11.969669914110089], [35.5, -11.75], [36.03033008588991, -11.969669914110089], [36.25, -12.5], [36.14644660940672, -12.75], [36.17677669529664, -12.823223304703363], [36.53033008588991, -12.969669914110089], [36.75, -13.5], [36.64644660940672, -13.75], [36.67677669529664, -13.823223304703363], [36.75, -13.853553390593275], [37.0, -13.75], [37.53033008588991, -13.969669914110089], [37.75, -14.5], [37.53033008588991, -15.030330085889911], [37.0, -15.25], [36.75, -15.146446609406725], [36.5, -15.25], [36.19822330470336, -15.125], [36.03033008588991, -15.530330085889911], [35.5, -15.75], [34.96966991411009, -15.530330085889911], [34.82322330470336, -15.176776695296637], [34.75, -15.146446609406725], [34.5, -15.25], [33.96966991411009, -15.030330085889911], [33.82322330470336, -14.676776695296637], [33.46966991411009, -14.530330085889911], [33.32322330470336, -14.176776695296637], [32.96966991411009, -14.030330085889911], [32.75, -13.5], [32.85355339059328, -13.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.6279991701453014}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5827339795256758}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.54563035839118, 21.617738220950514, 21.55694516803476, 21.413901133909064, 21.97900186702782, 21.094327180771472]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.374645059447005, 18.87062654714731, 17.88038093303362, 18.110954754863883, 19.140749499605988, 19.2659096723699]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2342022313852992, -1.3759578990710066, -1.7046077583716623, -1.809975520416279, -1.4056489751326073, -1.351011106219549]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5709130116874235, -1.7566100475439157, -2.6279991701453014, -2.5183081373067466, -1.9435800277772728, -1.8418658914479238]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4303871862757427, -1.4651197289611118, -1.7707481532759792, -1.9338271167859442, -1.535721051609124, -1.4577692672842333]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7152283992332, -1.9010278425508351, -2.8379479128203284, -2.784235539401144, -2.19466359933586, -2.0496499458060113]}}