era5-daily-anomalies.json

{
  "process_graph": {
    "load": {
      "process_id": "load_collection",
      "description": "Load ERA5 monthly 2m air temperature from 1979 to 2019",
      "arguments": {
        "id": "ECMWF/ERA5/DAILY",
        "spatial_extent": null,
        "temporal_extent": [
          "1979-01-01",
          "2011-01-01"
        ],
        "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": "day"
      }
    },
    "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": "day"
      }
    },
    "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
    }
  }
}