era5-monthly-anomalies.json

{
	"process_graph": {
		"load": {
			"process_id": "load_collection",
			"description": "Load ERA5 monthly 2m air temperature from 1979 to 2019",
			"arguments": {
				"id": "ECMWF/ERA5/MONTHLY",
				"spatial_extent": null,
				"temporal_extent": ["1979-01-01","2020-01-01"],
				"bands": ["mean_2m_air_temperature"]
			}
		},
		"convert": {
			"process_id": "apply",
			"description": "Convert temperature from K to degree celsius",
			"arguments": {
				"data": {"from_node": "load"},
				"process": {
					"process_graph": {
						"k_to_degC": {
							"process_id": "subtract",
							"arguments": {
								"x": {"from_parameter": "x"},
								"y": 273.15
							},
							"result": true
						}
					}
				}
			}
		},
		"normals": {
			"process_id": "climatological_normal",
			"description": "Create the climatological period normals.",
			"arguments": {
				"data": {"from_node": "convert"},
				"period": "month"
			}
		},
		"anomaly": {
			"process_id": "anomaly",
			"description": "For each month in the time-series, calculate the anomaly",
			"arguments": {
				"data": {"from_node": "convert"},
				"normals": {"from_node": "normals"},
				"period": "month"
			}
		},
		"reduce": {
			"process_id": "reduce_dimension",
			"description": "Reduce to first month - for visualization purposes only",
			"arguments": {
				"data": {"from_node": "anomaly"},
				"reducer": {
					"process_graph": {
						"first": {
							"process_id": "first",
							"arguments": {
								"data": {
									"from_parameter": "data"
								}
							},
							"result": true
						}
					}
				},
				"dimension": "t"
			}
		},
		"stretch": {
			"process_id": "apply",
			"description": "Stretch range from -1 / 1 to 0 / 255 for PNG visualization.",
			"arguments": {
				"data": {"from_node": "reduce"},
				"process": {
					"process_graph": {
						"linear_scale_range": {
							"process_id": "linear_scale_range",
							"arguments": {
								"x": {
									"from_parameter": "x"
								},
								"inputMin": -10,
								"inputMax": 10,
								"outputMax": 255
							},
							"result": true
						}
					}
				}
			}
		},
		"save": {
			"process_id": "save_result",
			"arguments": {
				"data": {
					"from_node": "stretch"
				},
				"format": "PNG",
				"options": {
					"palette": ["#2166AC","#4393C3","#92C5DE","#D1E5F0","#F7F7F7","#FDDBC7","#F4A582","#D6604D","#B2182B"]
				}
			},
			"result": true
		}
	}
}