[
  {
    "eccharts_layer": "cds_huss",
    "prefered_units": "g/kg",
    "styles": [
      "sh_spechum_option1",
      "sh_spechum_option2",
      "sh_spechum_option3",
      "spechum_extra1"
    ],
    "match": [
      {
        "long_name": "Near-Surface Specific Humidity",
        "standard_name": "specific_humidity"
      }
    ]
  }
]