Alaska + Arctic Geospatial Data API

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