{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:10:58.847761", "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-Jan-14_to_2020-Jan-18_177.0_-39.0"}, "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": 2020010000398}, "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": "January 14 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 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": 250853.61390376184}, "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": ["New Zealand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": ["Pacific 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": -39.0}, "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": 177.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "177.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 175.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 180.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -43.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -33.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[177.503, -43.749], [177.5, -43.75], [177.497, -43.749], [177.503, -43.749]]], [[[175.97, -41.03], [176.5, -41.25], [176.802, -41.125], [176.854, -41.25], [176.823, -41.323], [176.47, -41.47], [176.323, -41.823], [175.97, -41.97], [175.75, -42.5], [175.97, -43.03], [176.5, -43.25], [176.802, -43.125], [176.97, -43.53], [177.497, -43.749], [-179.97, -43.53], [-179.75, -43.0], [-179.957, -42.5], [-179.823, -42.177], [-179.47, -42.03], [-179.25, -41.5], [-179.47, -40.97], [-179.823, -40.823], [-179.854, -40.75], [-179.75, -40.5], [-179.854, -40.25], [-179.823, -40.177], [-179.47, -40.03], [-179.25, -39.5], [-179.354, -39.25], [-179.263, -39.03], [-179.97, -39.03], [-179.75, -38.5], [-179.823, -38.323], [-179.957, -38.0], [-179.97, -37.97], [-179.945, -37.97], [-179.75, -37.5], [-179.854, -37.25], [-179.75, -37.0], [-179.97, -36.47], [174.822, -36.325], [174.97, -35.97], [175.5, -35.75], [175.75, -35.854], [175.823, -35.823], [175.854, -35.75], [175.75, -35.5], [175.854, -35.25], [175.75, -35.0], [175.97, -34.47], [176.323, -34.323], [176.354, -34.25], [176.25, -34.0], [176.354, -33.75], [176.25, -33.5], [176.47, -32.97], [177.0, -32.75], [177.25, -32.854], [177.5, -32.75], [178.03, -32.97], [178.177, -33.323], [178.53, -33.47], [178.75, -34.0], [178.646, -34.25], [178.75, -34.5], [178.646, -34.75], [178.646, -34.751], [178.656, -34.774], [178.677, -34.823], [179.03, -34.97], [179.177, -35.323], [179.53, -35.47], [179.75, -36.0], [179.646, -36.25], [179.677, -36.323], [179.176, -36.323], [179.25, -36.5], [179.042, -37.0], [179.25, -37.5], [179.146, -37.75], [177.353, -37.751], [177.323, -37.823], [177.25, -37.854], [177.005, -37.752], [177.004, -37.752], [176.996, -37.752], [176.47, -37.97], [176.323, -38.323], [175.97, -38.47], [175.823, -38.823], [175.75, -39.0], [175.823, -39.175], [175.385, -39.175], [175.25, -39.5], [175.47, -40.03], [175.823, -40.177], [175.854, -40.25], [175.75, -40.5], [175.97, -41.03]], [[174.75, -36.5], [174.97, -37.03], [175.323, -37.177], [175.25, -37.0], [175.47, -36.47], [175.82, -36.325], [174.822, -36.325], [174.75, -36.5]], [[176.68, -36.324], [177.03, -36.47], [177.25, -37.0], [177.03, -37.53], [176.75, -37.646], [177.0, -37.75], [177.25, -37.646], [177.375, -37.698], [177.47, -37.47], [177.823, -37.323], [177.875, -37.198], [177.47, -37.03], [177.25, -36.5], [177.323, -36.324], [176.68, -36.324]], [[176.32, -36.324], [176.18, -36.324], [176.25, -36.354], [176.32, -36.324]]], [[[178.002, -43.749], [178.0, -43.75], [177.998, -43.749], [178.002, -43.749]]], [[[179.25, -43.646], [179.5, -43.75], [179.001, -43.75], [179.25, -43.646]]], [[[177.503, -43.749], [177.75, -43.646], [177.998, -43.749], [177.503, -43.749]]], [[[178.002, -43.749], [178.5, -43.543], [178.999, -43.75], [178.002, -43.749]]], [[[177.323, -39.677], [177.25, -39.646], [177.177, -39.677], [177.03, -40.03], [176.5, -40.25], [175.97, -40.03], [175.75, -39.5], [175.854, -39.25], [175.823, -39.175], [179.677, -39.177], [179.53, -39.53], [179.0, -39.75], [178.75, -39.646], [178.677, -39.677], [178.53, -40.03], [178.0, -40.25], [177.47, -40.03], [177.323, -39.677]]], [[[179.125, -37.802], [179.146, -37.75], [179.5, -37.75], [179.25, -37.854], [179.125, -37.802]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.W.South-America", "S.E.South-America", "S.South-America", "E.Australia", "S.Australia", "New-Zealand", "S.Pacific-Ocean", "S.Atlantic-Ocean", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.46966991411009, -40.03033008588991], [175.25, -39.5], [175.46966991411009, -38.96966991411009], [175.82322330470336, -38.82322330470336], [175.96966991411009, -38.46966991411009], [176.32322330470336, -38.32322330470336], [176.46966991411009, -37.96966991411009], [177.0, -37.75], [177.25, -37.85355339059328], [177.32322330470336, -37.82322330470336], [177.46966991411009, -37.46966991411009], [177.82322330470336, -37.32322330470336], [177.96966991411009, -36.96966991411009], [178.5, -36.75], [179.03033008588991, -36.96966991411009], [179.25, -37.5], [179.125, -37.80177669529664], [179.25, -37.85355339059328], [179.5, -37.75], [-179.96966991411009, -37.96966991411009], [-179.82322330470336, -38.32322330470336], [-179.46966991411009, -38.46966991411009], [-179.25, -39.0], [-179.35355339059328, -39.25], [-179.25, -39.5], [-179.46966991411009, -40.03033008588991], [-179.82322330470336, -40.17677669529664], [-179.85355339059328, -40.25], [-179.75, -40.5], [-179.85355339059328, -40.75], [-179.82322330470336, -40.82322330470336], [-179.46966991411009, -40.96966991411009], [-179.25, -41.5], [-179.46966991411009, -42.03033008588991], [-179.82322330470336, -42.17677669529664], [-179.95710678118655, -42.5], [-179.75, -43.0], [-179.96966991411009, -43.53033008588991], [179.5, -43.75], [179.25, -43.64644660940672], [179.0, -43.75], [178.5, -43.542893218813454], [178.0, -43.75], [177.75, -43.64644660940672], [177.5, -43.75], [176.96966991411009, -43.53033008588991], [176.80177669529664, -43.125], [176.5, -43.25], [175.96966991411009, -43.03033008588991], [175.75, -42.5], [175.96966991411009, -41.96966991411009], [176.32322330470336, -41.82322330470336], [176.46966991411009, -41.46966991411009], [176.82322330470336, -41.32322330470336], [176.85355339059328, -41.25], [176.80177669529664, -41.125], [176.5, -41.25], [175.96966991411009, -41.03033008588991], [175.75, -40.5], [175.85355339059328, -40.25], [175.82322330470336, -40.17677669529664], [175.46966991411009, -40.03033008588991]]], [[[176.0, -37.75], [175.46966991411009, -37.53033008588991], [175.25, -37.0], [175.46966991411009, -36.46966991411009], [176.0, -36.25], [176.25, -36.35355339059328], [176.5, -36.25], [177.03033008588991, -36.46966991411009], [177.25, -37.0], [177.03033008588991, -37.53033008588991], [176.5, -37.75], [176.25, -37.64644660940672], [176.0, -37.75]]]]}, "2020-01-15T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[175.32322330470336, -37.17677669529664], [174.96966991411009, -37.03033008588991], [174.75, -36.5], [174.96966991411009, -35.96966991411009], [175.5, -35.75], [175.75, -35.85355339059328], [175.82322330470336, -35.82322330470336], [175.85355339059328, -35.75], [175.75, -35.5], [175.85355339059328, -35.25], [175.75, -35.0], [175.96966991411009, -34.46966991411009], [176.5, -34.25], [176.75, -34.35355339059328], [177.0, -34.25], [177.25, -34.35355339059328], [177.5, -34.25], [177.75, -34.35355339059328], [178.0, -34.25], [178.53033008588991, -34.46966991411009], [178.75, -35.0], [178.64644660940672, -35.25], [178.67677669529664, -35.32322330470336], [178.75, -35.35355339059328], [179.0, -35.25], [179.53033008588991, -35.46966991411009], [179.75, -36.0], [179.64644660940672, -36.25], [179.67677669529664, -36.32322330470336], [-179.96966991411009, -36.46966991411009], [-179.75, -37.0], [-179.85355339059328, -37.25], [-179.75, -37.5], [-179.95710678118655, -38.0], [-179.82322330470336, -38.32322330470336], [-179.46966991411009, -38.46966991411009], [-179.25, -39.0], [-179.35355339059328, -39.25], [-179.25, -39.5], [-179.46966991411009, -40.03033008588991], [-179.82322330470336, -40.17677669529664], [-179.85355339059328, -40.25], [-179.75, -40.5], [-179.85355339059328, -40.75], [-179.82322330470336, -40.82322330470336], [-179.46966991411009, -40.96966991411009], [-179.25, -41.5], [-179.46966991411009, -42.03033008588991], [-179.82322330470336, -42.17677669529664], [-179.95710678118655, -42.5], [-179.75, -43.0], [-179.96966991411009, -43.53033008588991], [179.5, -43.75], [179.25, -43.64644660940672], [179.0, -43.75], [178.5, -43.542893218813454], [178.0, -43.75], [177.75, -43.64644660940672], [177.5, -43.75], [176.96966991411009, -43.53033008588991], [176.80177669529664, -43.125], [176.5, -43.25], [175.96966991411009, -43.03033008588991], [175.75, -42.5], [175.96966991411009, -41.96966991411009], [176.32322330470336, -41.82322330470336], [176.46966991411009, -41.46966991411009], [176.82322330470336, -41.32322330470336], [176.85355339059328, -41.25], [176.80177669529664, -41.125], [176.5, -41.25], [175.96966991411009, -41.03033008588991], [175.75, -40.5], [175.85355339059328, -40.25], [175.82322330470336, -40.17677669529664], [175.46966991411009, -40.03033008588991], [175.25, -39.5], [175.46966991411009, -38.96966991411009], [175.82322330470336, -38.82322330470336], [175.96966991411009, -38.46966991411009], [176.32322330470336, -38.32322330470336], [176.46966991411009, -37.96966991411009], [177.0, -37.75], [176.75, -37.64644660940672], [176.5, -37.75], [176.25, -37.64644660940672], [176.0, -37.75], [175.46966991411009, -37.53033008588991], [175.32322330470336, -37.17677669529664]], [[177.0, -37.75], [177.25, -37.85355339059328], [177.32322330470336, -37.82322330470336], [177.375, -37.69822330470336], [177.25, -37.64644660940672], [177.0, -37.75]]]}, "2020-01-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[175.32322330470336, -37.17677669529664], [174.96966991411009, -37.03033008588991], [174.75, -36.5], [174.96966991411009, -35.96966991411009], [175.5, -35.75], [175.75, -35.85355339059328], [175.82322330470336, -35.82322330470336], [175.85355339059328, -35.75], [175.75, -35.5], [175.85355339059328, -35.25], [175.75, -35.0], [175.96966991411009, -34.46966991411009], [176.32322330470336, -34.32322330470336], [176.35355339059328, -34.25], [176.25, -34.0], [176.35355339059328, -33.75], [176.25, -33.5], [176.46966991411009, -32.96966991411009], [177.0, -32.75], [177.25, -32.85355339059328], [177.5, -32.75], [178.03033008588991, -32.96966991411009], [178.17677669529664, -33.32322330470336], [178.53033008588991, -33.46966991411009], [178.75, -34.0], [178.64644660940672, -34.25], [178.75, -34.5], [178.64644660940672, -34.75], [178.67677669529664, -34.82322330470336], [179.03033008588991, -34.96966991411009], [179.17677669529664, -35.32322330470336], [179.53033008588991, -35.46966991411009], [179.75, -36.0], [179.64644660940672, -36.25], [179.67677669529664, -36.32322330470336], [-179.96966991411009, -36.46966991411009], [-179.75, -37.0], [-179.85355339059328, -37.25], [-179.75, -37.5], [-179.95710678118655, -38.0], [-179.82322330470336, -38.32322330470336], [-179.46966991411009, -38.46966991411009], [-179.25, -39.0], [-179.35355339059328, -39.25], [-179.25, -39.5], [-179.46966991411009, -40.03033008588991], [-179.82322330470336, -40.17677669529664], [-179.85355339059328, -40.25], [-179.75, -40.5], [-179.85355339059328, -40.75], [-179.82322330470336, -40.82322330470336], [-179.46966991411009, -40.96966991411009], [-179.25, -41.5], [-179.46966991411009, -42.03033008588991], [-179.82322330470336, -42.17677669529664], [-179.95710678118655, -42.5], [-179.75, -43.0], [-179.96966991411009, -43.53033008588991], [179.5, -43.75], [179.25, -43.64644660940672], [179.0, -43.75], [178.5, -43.542893218813454], [178.0, -43.75], [177.75, -43.64644660940672], [177.5, -43.75], [176.96966991411009, -43.53033008588991], [176.80177669529664, -43.125], [176.5, -43.25], [175.96966991411009, -43.03033008588991], [175.75, -42.5], [175.96966991411009, -41.96966991411009], [176.32322330470336, -41.82322330470336], [176.46966991411009, -41.46966991411009], [176.82322330470336, -41.32322330470336], [176.85355339059328, -41.25], [176.80177669529664, -41.125], [176.5, -41.25], [175.96966991411009, -41.03033008588991], [175.75, -40.5], [175.85355339059328, -40.25], [175.82322330470336, -40.17677669529664], [175.46966991411009, -40.03033008588991], [175.25, -39.5], [175.46966991411009, -38.96966991411009], [175.82322330470336, -38.82322330470336], [175.96966991411009, -38.46966991411009], [176.32322330470336, -38.32322330470336], [176.46966991411009, -37.96966991411009], [177.0, -37.75], [176.75, -37.64644660940672], [176.5, -37.75], [176.25, -37.64644660940672], [176.0, -37.75], [175.46966991411009, -37.53033008588991], [175.32322330470336, -37.17677669529664]], [[177.0, -37.75], [177.25, -37.85355339059328], [177.32322330470336, -37.82322330470336], [177.375, -37.69822330470336], [177.25, -37.64644660940672], [177.0, -37.75]]]}, "2020-01-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[175.32322330470336, -37.17677669529664], [174.96966991411009, -37.03033008588991], [174.75, -36.5], [174.96966991411009, -35.96966991411009], [175.5, -35.75], [175.75, -35.85355339059328], [175.82322330470336, -35.82322330470336], [175.85355339059328, -35.75], [175.75, -35.5], [175.85355339059328, -35.25], [175.75, -35.0], [175.96966991411009, -34.46966991411009], [176.32322330470336, -34.32322330470336], [176.35355339059328, -34.25], [176.25, -34.0], [176.35355339059328, -33.75], [176.25, -33.5], [176.46966991411009, -32.96966991411009], [177.0, -32.75], [177.25, -32.85355339059328], [177.5, -32.75], [178.03033008588991, -32.96966991411009], [178.17677669529664, -33.32322330470336], [178.53033008588991, -33.46966991411009], [178.75, -34.0], [178.64644660940672, -34.25], [178.75, -34.5], [178.64644660940672, -34.75], [178.67677669529664, -34.82322330470336], [179.03033008588991, -34.96966991411009], [179.17677669529664, -35.32322330470336], [179.53033008588991, -35.46966991411009], [179.75, -36.0], [179.64644660940672, -36.25], [179.67677669529664, -36.32322330470336], [-179.96966991411009, -36.46966991411009], [-179.75, -37.0], [-179.85355339059328, -37.25], [-179.75, -37.5], [-179.95710678118655, -38.0], [-179.75, -38.5], [-179.96966991411009, -39.03033008588991], [179.67677669529664, -39.17677669529664], [179.53033008588991, -39.53033008588991], [179.0, -39.75], [178.75, -39.64644660940672], [178.67677669529664, -39.67677669529664], [178.53033008588991, -40.03033008588991], [178.0, -40.25], [177.46966991411009, -40.03033008588991], [177.32322330470336, -39.67677669529664], [177.25, -39.64644660940672], [177.17677669529664, -39.67677669529664], [177.03033008588991, -40.03033008588991], [176.5, -40.25], [175.96966991411009, -40.03033008588991], [175.75, -39.5], [175.85355339059328, -39.25], [175.75, -39.0], [175.96966991411009, -38.46966991411009], [176.32322330470336, -38.32322330470336], [176.46966991411009, -37.96966991411009], [177.0, -37.75], [176.75, -37.64644660940672], [176.5, -37.75], [176.25, -37.64644660940672], [176.0, -37.75], [175.46966991411009, -37.53033008588991], [175.32322330470336, -37.17677669529664]], [[177.0, -37.75], [177.25, -37.85355339059328], [177.32322330470336, -37.82322330470336], [177.375, -37.69822330470336], [177.25, -37.64644660940672], [177.0, -37.75]]]}, "2020-01-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[176.35355339059328, -35.25], [176.25, -35.0], [176.35355339059328, -34.75], [176.25, -34.5], [176.35355339059328, -34.25], [176.25, -34.0], [176.35355339059328, -33.75], [176.25, -33.5], [176.46966991411009, -32.96966991411009], [177.0, -32.75], [177.25, -32.85355339059328], [177.5, -32.75], [178.03033008588991, -32.96966991411009], [178.17677669529664, -33.32322330470336], [178.53033008588991, -33.46966991411009], [178.75, -34.0], [178.64644660940672, -34.25], [178.75, -34.5], [178.625, -34.80177669529664], [179.03033008588991, -34.96966991411009], [179.25, -35.5], [179.14644660940672, -35.75], [179.25, -36.0], [179.14644660940672, -36.25], [179.25, -36.5], [179.03033008588991, -37.03033008588991], [178.5, -37.25], [178.25, -37.14644660940672], [178.0, -37.25], [177.46966991411009, -37.03033008588991], [177.25, -36.5], [177.35355339059328, -36.25], [177.32322330470336, -36.17677669529664], [177.25, -36.14644660940672], [177.0, -36.25], [176.46966991411009, -36.03033008588991], [176.25, -35.5], [176.35355339059328, -35.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.775175359834918}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.343037380507133}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.279704299385799, 15.686268550700333, 16.01355221537193, 17.07069298018206, 18.545218949512105]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.993737882020866, 10.245386872273059, 10.212405344203205, 10.463408515118488, 17.944031350469686]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0189796619188796, -2.3387304785817484, -2.2281518397673676, -2.0578964002481017, -1.4599127995255055]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.775175359834918, -4.761151039997799, -4.797167930098965, -4.339389452567957, -1.623665826317847]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8021119383019375, -1.5920289785619162, -1.5605943148457735, -1.6244088103906227, -1.4394239454465645]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.193329551468385, -1.8163465327082984, -1.785494776685426, -1.9303812567071952, -1.6092493792838314]}}