{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:13:19.609524", "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-May-11_to_2020-May-15_57.0_37.5"}, "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": 2020050000279}, "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": "May 11 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 15 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": 92177.202025632}, "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": ["Iran, Islamic Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 37.5}, "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": 57.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "57.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 54.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 58.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[54.97, 34.53], [55.323, 34.677], [55.354, 34.75], [55.302, 34.875], [55.0, 34.75], [54.75, 34.854], [54.5, 34.75], [53.97, 34.97], [53.75, 35.5], [53.854, 35.75], [53.75, 36.0], [53.97, 36.53], [54.5, 36.75], [54.75, 36.646], [55.0, 36.75], [55.25, 36.646], [55.323, 36.677], [55.354, 36.75], [55.25, 37.0], [55.354, 37.25], [55.25, 37.5], [55.47, 38.03], [55.823, 38.177], [55.97, 38.53], [56.5, 38.75], [56.75, 38.646], [57.0, 38.75], [57.53, 38.53], [57.677, 38.177], [57.75, 38.146], [58.0, 38.25], [58.25, 38.146], [58.5, 38.25], [59.03, 38.03], [59.25, 37.5], [59.146, 37.25], [59.25, 37.0], [59.146, 36.75], [59.25, 36.5], [59.03, 35.97], [58.5, 35.75], [58.25, 35.854], [58.249, 35.854], [58.0, 35.75], [57.751, 35.854], [57.75, 35.854], [57.677, 35.823], [57.646, 35.75], [57.75, 35.5], [57.53, 34.97], [57.177, 34.823], [57.146, 34.75], [57.25, 34.5], [57.03, 33.97], [56.677, 33.823], [56.53, 33.47], [56.0, 33.25], [55.75, 33.354], [55.5, 33.25], [54.97, 33.47], [54.75, 34.0], [54.97, 34.53]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-05-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[55.35355339059328, 37.25], [55.25, 37.5], [55.46966991411009, 38.03033008588991], [55.82322330470336, 38.17677669529664], [55.96966991411009, 38.53033008588991], [56.5, 38.75], [56.75, 38.64644660940672], [57.0, 38.75], [57.53033008588991, 38.53033008588991], [57.75, 38.0], [57.64644660940672, 37.75], [57.75, 37.5], [57.53033008588991, 36.96966991411009], [57.0, 36.75], [56.75, 36.85355339059328], [56.67677669529664, 36.82322330470336], [56.53033008588991, 36.46966991411009], [56.0, 36.25], [55.46966991411009, 36.46966991411009], [55.25, 37.0], [55.35355339059328, 37.25]]]}, "2020-05-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.85355339059328, 35.75], [53.75, 36.0], [53.96966991411009, 36.53033008588991], [54.5, 36.75], [54.75, 36.64644660940672], [55.0, 36.75], [55.25, 36.64644660940672], [55.32322330470336, 36.67677669529664], [55.35355339059328, 36.75], [55.25, 37.0], [55.35355339059328, 37.25], [55.25, 37.5], [55.46966991411009, 38.03033008588991], [55.82322330470336, 38.17677669529664], [55.96966991411009, 38.53033008588991], [56.5, 38.75], [56.75, 38.64644660940672], [57.0, 38.75], [57.53033008588991, 38.53033008588991], [57.67677669529664, 38.17677669529664], [57.75, 38.14644660940672], [58.0, 38.25], [58.25, 38.14644660940672], [58.5, 38.25], [59.03033008588991, 38.03033008588991], [59.25, 37.5], [59.14644660940672, 37.25], [59.25, 37.0], [59.14644660940672, 36.75], [59.25, 36.5], [59.03033008588991, 35.96966991411009], [58.5, 35.75], [58.0, 35.95710678118655], [57.67677669529664, 35.82322330470336], [57.64644660940672, 35.75], [57.75, 35.5], [57.53033008588991, 34.96966991411009], [57.17677669529664, 34.82322330470336], [57.14644660940672, 34.75], [57.25, 34.5], [57.03033008588991, 33.96966991411009], [56.67677669529664, 33.82322330470336], [56.53033008588991, 33.46966991411009], [56.0, 33.25], [55.46966991411009, 33.46966991411009], [55.25, 34.0], [55.35355339059328, 34.25], [55.25, 34.5], [55.35355339059328, 34.75], [55.30177669529664, 34.875], [55.0, 34.75], [54.75, 34.85355339059328], [54.5, 34.75], [53.96966991411009, 34.96966991411009], [53.75, 35.5], [53.85355339059328, 35.75]]]}, "2020-05-13T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.85355339059328, 35.75], [53.75, 36.0], [53.96966991411009, 36.53033008588991], [54.5, 36.75], [54.75, 36.64644660940672], [55.0, 36.75], [55.25, 36.64644660940672], [55.32322330470336, 36.67677669529664], [55.35355339059328, 36.75], [55.25, 37.0], [55.35355339059328, 37.25], [55.25, 37.5], [55.46966991411009, 38.03033008588991], [55.82322330470336, 38.17677669529664], [55.96966991411009, 38.53033008588991], [56.5, 38.75], [56.75, 38.64644660940672], [57.0, 38.75], [57.53033008588991, 38.53033008588991], [57.67677669529664, 38.17677669529664], [57.75, 38.14644660940672], [58.0, 38.25], [58.25, 38.14644660940672], [58.5, 38.25], [59.03033008588991, 38.03033008588991], [59.25, 37.5], [59.14644660940672, 37.25], [59.25, 37.0], [59.14644660940672, 36.75], [59.25, 36.5], [59.03033008588991, 35.96966991411009], [58.5, 35.75], [58.25, 35.85355339059328], [58.0, 35.75], [57.75, 35.85355339059328], [57.67677669529664, 35.82322330470336], [57.64644660940672, 35.75], [57.75, 35.5], [57.53033008588991, 34.96966991411009], [57.17677669529664, 34.82322330470336], [57.14644660940672, 34.75], [57.25, 34.5], [57.03033008588991, 33.96966991411009], [56.67677669529664, 33.82322330470336], [56.53033008588991, 33.46966991411009], [56.0, 33.25], [55.75, 33.35355339059328], [55.5, 33.25], [54.96966991411009, 33.46966991411009], [54.75, 34.0], [54.96966991411009, 34.53033008588991], [55.32322330470336, 34.67677669529664], [55.35355339059328, 34.75], [55.30177669529664, 34.875], [55.0, 34.75], [54.75, 34.85355339059328], [54.5, 34.75], [53.96966991411009, 34.96966991411009], [53.75, 35.5], [53.85355339059328, 35.75]]]}, "2020-05-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[53.85355339059328, 35.75], [53.75, 36.0], [53.96966991411009, 36.53033008588991], [54.5, 36.75], [54.75, 36.64644660940672], [55.0, 36.75], [55.25, 36.64644660940672], [55.32322330470336, 36.67677669529664], [55.35355339059328, 36.75], [55.25, 37.0], [55.35355339059328, 37.25], [55.25, 37.5], [55.46966991411009, 38.03033008588991], [55.82322330470336, 38.17677669529664], [55.96966991411009, 38.53033008588991], [56.5, 38.75], [56.75, 38.64644660940672], [57.0, 38.75], [57.53033008588991, 38.53033008588991], [57.67677669529664, 38.17677669529664], [57.75, 38.14644660940672], [58.0, 38.25], [58.25, 38.14644660940672], [58.5, 38.25], [59.03033008588991, 38.03033008588991], [59.25, 37.5], [59.14644660940672, 37.25], [59.25, 37.0], [59.14644660940672, 36.75], [59.25, 36.5], [59.03033008588991, 35.96966991411009], [58.5, 35.75], [58.25, 35.85355339059328], [58.0, 35.75], [57.75, 35.85355339059328], [57.67677669529664, 35.82322330470336], [57.64644660940672, 35.75], [57.75, 35.5], [57.53033008588991, 34.96966991411009], [57.17677669529664, 34.82322330470336], [57.14644660940672, 34.75], [57.25, 34.5], [57.03033008588991, 33.96966991411009], [56.67677669529664, 33.82322330470336], [56.53033008588991, 33.46966991411009], [56.0, 33.25], [55.75, 33.35355339059328], [55.5, 33.25], [54.96966991411009, 33.46966991411009], [54.75, 34.0], [54.96966991411009, 34.53033008588991], [55.32322330470336, 34.67677669529664], [55.35355339059328, 34.75], [55.30177669529664, 34.875], [55.0, 34.75], [54.75, 34.85355339059328], [54.5, 34.75], [53.96966991411009, 34.96966991411009], [53.75, 35.5], [53.85355339059328, 35.75]]]}, "2020-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.5, 33.25], [54.96966991411009, 33.46966991411009], [54.75, 34.0], [54.96966991411009, 34.53033008588991], [55.5, 34.75], [55.75, 34.64644660940672], [55.82322330470336, 34.67677669529664], [55.96966991411009, 35.03033008588991], [56.5, 35.25], [57.03033008588991, 35.03033008588991], [57.25, 34.5], [57.03033008588991, 33.96966991411009], [56.67677669529664, 33.82322330470336], [56.53033008588991, 33.46966991411009], [56.0, 33.25], [55.75, 33.35355339059328], [55.5, 33.25]]], [[[57.46966991411009, 37.53033008588991], [58.0, 37.75], [58.53033008588991, 37.53033008588991], [58.67677669529664, 37.17677669529664], [59.03033008588991, 37.03033008588991], [59.25, 36.5], [59.03033008588991, 35.96966991411009], [58.5, 35.75], [58.25, 35.85355339059328], [58.0, 35.75], [57.75, 35.85355339059328], [57.5, 35.75], [56.96966991411009, 35.96966991411009], [56.75, 36.5], [56.96966991411009, 37.03033008588991], [57.32322330470336, 37.17677669529664], [57.46966991411009, 37.53033008588991]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.580827278221989}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.441056333223414}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.269701121045898, 15.414208969157698, 16.43004967083948, 16.777674585158707, 18.53020280942127]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.273041534846868, 7.480579341694238, 9.661342947498838, 9.99800713517169, 11.008782456124777]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.260331033647958, -6.15450488421394, -5.336495226436009, -5.0614948440217775, -4.587654699563221]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.822368552971454, -7.580827278221989, -6.536501328088434, -6.227276999788387, -5.323242001782319]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6007520967903694, -1.8804486380051075, -1.6375641701555723, -1.5849923729628428, -1.4490375368518236]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7278238955175795, -2.4708029464495027, -1.9877887847454254, -1.85068792639892, -1.6022392944416295]}}