{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:12:45.067608", "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-Apr-19_to_2020-Apr-26_37.5_0.5"}, "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": 2020040000545}, "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": "April 19 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 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": 52534.55495755844}, "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": ["Kenya"]}, "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": 0.5}, "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": 37.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 39.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -0.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[38.75, 1.646], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.646, 0.75], [39.75, 0.5], [39.53, -0.03], [39.177, -0.177], [39.146, -0.249], [39.146, -0.25], [39.25, -0.5], [39.03, -1.03], [38.5, -1.25], [38.25, -1.146], [38.0, -1.25], [37.47, -1.03], [37.25, -0.5], [37.354, -0.25], [37.354, -0.249], [37.323, -0.177], [36.97, -0.03], [36.75, 0.5], [36.854, 0.75], [36.75, 1.0], [36.854, 1.25], [36.75, 1.5], [36.854, 1.75], [36.75, 2.0], [36.854, 2.25], [36.75, 2.5], [36.854, 2.75], [36.75, 3.0], [36.97, 3.53], [37.5, 3.75], [38.03, 3.53], [38.25, 3.0], [38.146, 2.75], [38.25, 2.5], [38.146, 2.25], [38.177, 2.177], [38.53, 2.03], [38.677, 1.677], [38.75, 1.646]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.75, 0.5], [36.96966991411009, 1.0303300858899105], [37.5, 1.25], [38.03033008588991, 1.0303300858899107], [38.25, 0.5], [38.03033008588991, -0.030330085889910596], [37.5, -0.25], [36.96966991411009, -0.030330085889910707], [36.75, 0.5]]]}, "2020-04-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.75, 0.5], [36.96966991411009, 1.0303300858899105], [37.5, 1.25], [38.03033008588991, 1.0303300858899107], [38.25, 0.5], [38.03033008588991, -0.030330085889910596], [37.5, -0.25], [36.96966991411009, -0.030330085889910707], [36.75, 0.5]]]}, "2020-04-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.75, 0.5], [36.96966991411009, 1.0303300858899105], [37.5, 1.25], [38.03033008588991, 1.0303300858899107], [38.25, 0.5], [38.03033008588991, -0.030330085889910596], [37.5, -0.25], [36.96966991411009, -0.030330085889910707], [36.75, 0.5]]]}, "2020-04-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 0.75], [36.75, 1.0], [36.96966991411009, 1.5303300858899105], [37.5, 1.75], [37.75, 1.6464466094067256], [38.0, 1.75], [38.25, 1.6464466094067256], [38.5, 1.75], [38.75, 1.6464466094067256], [39.0, 1.75], [39.53033008588991, 1.5303300858899107], [39.75, 1.0], [39.64644660940672, 0.75], [39.75, 0.5], [39.53033008588991, -0.030330085889910596], [39.125, -0.19822330470336344], [39.25, -0.5], [39.03033008588991, -1.0303300858899105], [38.5, -1.25], [38.25, -1.1464466094067256], [38.0, -1.25], [37.46966991411009, -1.0303300858899107], [37.25, -0.5], [37.375, -0.19822330470336347], [36.96966991411009, -0.030330085889910707], [36.75, 0.5], [36.85355339059328, 0.75]]]}, "2020-04-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 0.75], [36.75, 1.0], [36.96966991411009, 1.5303300858899105], [37.5, 1.75], [37.75, 1.6464466094067256], [38.0, 1.75], [38.25, 1.6464466094067256], [38.5, 1.75], [38.75, 1.6464466094067256], [39.0, 1.75], [39.53033008588991, 1.5303300858899107], [39.75, 1.0], [39.64644660940672, 0.75], [39.75, 0.5], [39.53033008588991, -0.030330085889910596], [39.17677669529664, -0.17677669529663687], [39.14644660940672, -0.24999999999999997], [39.25, -0.5], [39.03033008588991, -1.0303300858899105], [38.5, -1.25], [38.25, -1.1464466094067256], [38.0, -1.25], [37.46966991411009, -1.0303300858899107], [37.25, -0.5], [37.35355339059328, -0.25], [37.32322330470336, -0.1767766952966369], [36.96966991411009, -0.030330085889910707], [36.75, 0.5], [36.85355339059328, 0.75]]]}, "2020-04-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 0.75], [36.75, 1.0], [36.85355339059328, 1.25], [36.75, 1.5], [36.85355339059328, 1.75], [36.75, 2.0], [36.85355339059328, 2.25], [36.75, 2.5], [36.85355339059328, 2.75], [36.75, 3.0], [36.96966991411009, 3.5303300858899105], [37.5, 3.75], [38.03033008588991, 3.5303300858899105], [38.25, 3.0], [38.14644660940672, 2.75], [38.25, 2.5], [38.14644660940672, 2.25], [38.17677669529664, 2.176776695296637], [38.53033008588991, 2.0303300858899105], [38.67677669529664, 1.676776695296637], [38.75, 1.6464466094067256], [39.0, 1.75], [39.53033008588991, 1.5303300858899107], [39.75, 1.0], [39.64644660940672, 0.75], [39.75, 0.5], [39.53033008588991, -0.030330085889910596], [39.17677669529664, -0.17677669529663687], [39.14644660940672, -0.24999999999999997], [39.25, -0.5], [39.03033008588991, -1.0303300858899105], [38.5, -1.25], [38.25, -1.1464466094067256], [38.0, -1.25], [37.46966991411009, -1.0303300858899107], [37.25, -0.5], [37.35355339059328, -0.25], [37.32322330470336, -0.1767766952966369], [36.96966991411009, -0.030330085889910707], [36.75, 0.5], [36.85355339059328, 0.75]]]}, "2020-04-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 0.75], [36.75, 1.0], [36.85355339059328, 1.25], [36.75, 1.5], [36.85355339059328, 1.75], [36.75, 2.0], [36.85355339059328, 2.25], [36.75, 2.5], [36.85355339059328, 2.75], [36.75, 3.0], [36.96966991411009, 3.5303300858899105], [37.5, 3.75], [38.03033008588991, 3.5303300858899105], [38.25, 3.0], [38.14644660940672, 2.75], [38.25, 2.5], [38.14644660940672, 2.25], [38.17677669529664, 2.176776695296637], [38.53033008588991, 2.0303300858899105], [38.67677669529664, 1.676776695296637], [38.75, 1.6464466094067256], [39.0, 1.75], [39.53033008588991, 1.5303300858899107], [39.75, 1.0], [39.64644660940672, 0.75], [39.75, 0.5], [39.53033008588991, -0.030330085889910596], [39.17677669529664, -0.17677669529663687], [39.14644660940672, -0.24999999999999997], [39.25, -0.5], [39.03033008588991, -1.0303300858899105], [38.5, -1.25], [38.25, -1.1464466094067256], [38.0, -1.25], [37.46966991411009, -1.0303300858899107], [37.25, -0.5], [37.35355339059328, -0.25], [37.32322330470336, -0.1767766952966369], [36.96966991411009, -0.030330085889910707], [36.75, 0.5], [36.85355339059328, 0.75]]]}, "2020-04-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[36.85355339059328, 1.75], [36.75, 2.0], [36.85355339059328, 2.25], [36.75, 2.5], [36.85355339059328, 2.75], [36.75, 3.0], [36.96966991411009, 3.5303300858899105], [37.5, 3.75], [38.03033008588991, 3.5303300858899105], [38.25, 3.0], [38.14644660940672, 2.75], [38.25, 2.5], [38.14644660940672, 2.25], [38.17677669529664, 2.176776695296637], [38.53033008588991, 2.0303300858899105], [38.67677669529664, 1.676776695296637], [38.75, 1.6464466094067256], [39.0, 1.75], [39.53033008588991, 1.5303300858899107], [39.75, 1.0], [39.64644660940672, 0.75], [39.75, 0.5], [39.53033008588991, -0.030330085889910596], [39.0, -0.25], [38.46966991411009, -0.030330085889910707], [38.32322330470336, 0.3232233047033631], [38.25, 0.3535533905932743], [38.0, 0.25], [37.46966991411009, 0.4696699141100893], [37.32322330470336, 0.8232233047033631], [36.96966991411009, 0.9696699141100893], [36.75, 1.5], [36.85355339059328, 1.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.942425498416526}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3018247578882822}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.55435039662359, 23.00450582920047, 22.741896030695614, 24.71310190362152, 24.55585102364563, 24.643787092152024, 24.529509699888308, 26.02156831775278]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.55435039662359, 23.00450582920047, 22.741896030695614, 22.240932641764743, 21.92414809461735, 21.573389552558467, 21.777157004020694, 24.133222943927763]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.107922165170521, -1.641804900808836, -1.893022015800966, -1.9005889505059044, -2.121324546752163, -2.458872881150766, -2.5454292981733433, -2.3272419480717366]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.107922165170521, -1.641804900808836, -1.893022015800966, -2.5575124703377696, -2.4183923203720497, -3.942425498416526, -3.26580482443876, -2.783863167162224]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.813252233997838, -1.3915176184015972, -1.598226805931372, -1.5824793963719257, -1.8309093959293214, -1.9064723623731088, -2.0849837620075338, -1.6364118375914656]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.813252233997838, -1.3915176184015972, -1.598226805931372, -1.9975133142623145, -2.279742430936292, -2.525839278769085, -2.840066987825013, -2.0458366617411197]}}