University of Alaska Fairbanks • Scenarios Network for Alaska + Arctic Planning

Alaska + Arctic Geospatial Data API

Built by the Scenarios Network for Alaska + Arctic Planning

Permafrost point query

Query permafrost data (e.g. extent, ground temperatures) for a single point specified by latitude and longitude.

Example: /permafrost/point/65.0628/-146.1627

Results from the query above will look like this:

{
  "gipl": {
    "1995": {
      "cruts31": {
        "historical": {
          "alt": 0.59,
          "magt": -2.2
        }
      }
    },
    "2025": {
      "gfdlcm3": {
        "rcp45": {
          "alt": 0.68,
          "magt": 0
        },
        "rcp85": {
          "alt": 0.66,
          "magt": 0
        }
      },
      "gisse2r": {
        "rcp45": {
          "alt": 0.61,
          "magt": -1
        },
        "rcp85": {
          "alt": 0.6,
          "magt": -1.1
        }
      },
      "ipslcm5alr": {
        "rcp45": {
          "alt": 0.65,
          "magt": -0.9
        },
        "rcp85": {
          "alt": 0.69,
          "magt": -0.1
        }
      },
      "mricgcm3": {
        "rcp45": {
          "alt": 0.61,
          "magt": -1.2
        },
        "rcp85": {
          "alt": 0.6,
          "magt": -1.1
        }
      },
      "ncarccsm4": {
        "rcp45": {
          "alt": 0.66,
          "magt": -0.6
        },
        "rcp85": {
          "alt": 0.64,
          "magt": -0.5
        }
      }
    },
    "2050": {
      "gfdlcm3": {
        "rcp45": {
          "alt": 0.98,
          "magt": 2.2
        },
        "rcp85": {
          "alt": 0.81,
          "magt": 3.2
        }
      },
      "gisse2r": {
        "rcp45": {
          "alt": 0.62,
          "magt": -0.8
        },
        "rcp85": {
          "alt": 0.64,
          "magt": -0.2
        }
      },
      "ipslcm5alr": {
        "rcp45": {
          "alt": 0.68,
          "magt": -0.2
        },
        "rcp85": {
          "alt": 0.69,
          "magt": -0.1
        }
      },
      "mricgcm3": {
        "rcp45": {
          "alt": 0.63,
          "magt": -0.8
        },
        "rcp85": {
          "alt": 0.63,
          "magt": -0.6
        }
      },
      "ncarccsm4": {
        "rcp45": {
          "alt": 0.67,
          "magt": -0.4
        },
        "rcp85": {
          "alt": 1.21,
          "magt": 0.3
        }
      }
    },
    "2075": {
      "gfdlcm3": {
        "rcp45": {
          "alt": 0.81,
          "magt": 3.4
        },
        "rcp85": {
          "alt": 0.54,
          "magt": 5.6
        }
      },
      "gisse2r": {
        "rcp45": {
          "alt": 0.62,
          "magt": -0.7
        },
        "rcp85": {
          "alt": 0.65,
          "magt": 0
        }
      },
      "ipslcm5alr": {
        "rcp45": {
          "alt": 1.26,
          "magt": 0.1
        },
        "rcp85": {
          "alt": 0.91,
          "magt": 3.1
        }
      },
      "mricgcm3": {
        "rcp45": {
          "alt": 0.64,
          "magt": -0.7
        },
        "rcp85": {
          "alt": 1.19,
          "magt": 0.1
        }
      },
      "ncarccsm4": {
        "rcp45": {
          "alt": 1.17,
          "magt": 0.7
        },
        "rcp85": {
          "alt": 0.9,
          "magt": 2.6
        }
      }
    },
    "2095": {
      "gfdlcm3": {
        "rcp45": {
          "alt": 0.81,
          "magt": 3.9
        },
        "rcp85": {
          "alt": 0.33,
          "magt": 7.5
        }
      },
      "gisse2r": {
        "rcp45": {
          "alt": 0.61,
          "magt": -0.7
        },
        "rcp85": {
          "alt": 1.1,
          "magt": 0.7
        }
      },
      "ipslcm5alr": {
        "rcp45": {
          "alt": 1.15,
          "magt": 0.9
        },
        "rcp85": {
          "alt": 0.66,
          "magt": 5.2
        }
      },
      "mricgcm3": {
        "rcp45": {
          "alt": 0.66,
          "magt": -0.4
        },
        "rcp85": {
          "alt": 0.99,
          "magt": 1.7
        }
      },
      "ncarccsm4": {
        "rcp45": {
          "alt": 1.18,
          "magt": 0.5
        },
        "rcp85": {
          "alt": 0.6,
          "magt": 5.5
        }
      }
    },
    "title": "Melvin et al. (2017) GIPL 2.0 Mean Annual Ground Temperature (°C) and Active Layer Thickness (m) Model Output"
  },
  "jorg": {
    "ice": "Moderate",
    "pfx": "Discontinuous",
    "title": "Jorgenson et al. (2008) Permafrost Extent and Ground Ice Volume"
  },
  "obu_magt": {
    "depth": "Top of Permafrost",
    "temp": 0.2,
    "title": "Obu et al. (2018) 2000-2016 Mean Annual Top of Permafrost Ground Temperature (°C)",
    "year": "2000-2016"
  },
  "obupfx": {
    "pfx": "Sporadic",
    "title": "Obu et al. (2018) Permafrost Extent"
  }
}
  • gipl: GIPL 2.0 Model Outputs
    • era: (str), Era name. "1995" refers to the historical baseline. Otherwise these are 30 year eras surrounding the following center dates, except last era is truncated at 2100: "2025" (2011 - 2040), "2050" (2036 - 2065), "2075" (2061 – 2090), "2095" (2086 – 2100).
      • model: (str), Climate model driving the GIPL model output.
        • scenario: (str), RCP Emissions Scenario driving the GIPL model output.
          • alt: (float), Active Layer Thickness (m).
          • magt: (float), Mean annual ground temperature (°C).
          • title: (str), Title describing these results.
  • jorg: Jorgenson et al. (2008) Permafrost Characteristics of Alaska
    • ice: (str), Estimated ground ice volume.
    • pfx: (str), Permafrost extent.
    • title: (str), Title describing these results.
  • obu_magt: Obu et al. (2018) Modeled Mean Annual Ground Temperature at Top of Permafrost
    • depth: (str), Top of permafrost (i.e. depth of active layer).
    • temp: (float), Mean annual ground temperature (°C).
    • title: (str), Title describing these results.
    • year: (str), Date range of model output.
  • jorg: Obu et al. (2018) Modeled Permafrost Extent
    • pfx: (str), Permafrost extent.
    • title: (str), Title describing these results.

Source data

Data Layer Variables Download link Source Notes
GIPL Model Ouputs Mean Annual Ground Temperature, Active Layer Thickness Shell Download Script Melvin et al. (2017) MAGT is modeled for the depth of the active layer.
Jorgenson Permafrost Characteristics Permafrost Extent, Ground Ice Volume https://catalog.northslopescience.org/dataset/1725/resource/5811669f-860c-450e-9bc0-9dfc21821606 https://catalog.northslopescience.org/dataset/1725
Obu et al. 2018 Mean Annual Ground Temperature, Permafrost Extent https://store.pangaea.de/Publications/ObuJ-etal_2018/UiO_PEX_MAGTM_5.0_20181127_2000_2016_NH.zip, https://store.pangaea.de/Publications/ObuJ-etal_2018/UiO_PEX_PERZONES_5.0_20181128_2000_2016_NH.zip https://doi.org/10.1594/PANGAEA.888600