{
  "title": "Thermospheric neutral density scaling factors to account for future CO2 scenarios.",
  "description": "\n Carbon dioxide causes thermospheric contraction in the upper atmosphere, reducing neutral densities at fixed altitudes. However, this isn't modelled by current empirical models. The scaling factors included within this dataset are created with the Whole Atmosphere Community Climate Model with ionosphere and thermosphere extension (WACCM-X), and allow empirical models (assuming they accurately represent the year 2000 or later) to account for CO2 induced density reductions. Scaling factors are global mean, annual mean neutral densities relative to the similar value in year 2000, under increasing CO2 concentrations and solar activity conditions (via the F10.7 proxy). Modelled values are interpolated in carbon dioxide concentration onto the future CO2 scenarios of the Representative Concentration Pathways (RCPs) and Shared Socioeconomic Pathways (SSPs) published by the Intergovernmental Panel on Climate Change (IPCC). F10.7 values are left as a dimension to allow the user to choose the future solar activity conditions.",
  "authors": [
    {
      "firstname": "Matthew",
      "surname": "Brown"
    },
    {
      "firstname": "Sean",
      "surname": "Elvidge"
    }
  ],
  "bbox": {
    "north": "90",
    "south": "90",
    "east": "180",
    "west": "180"
  },
  "time_range": {
    "start": "2000",
    "end": "2100"
  },
  "lineage": "Neutral densities simulated with the Whole Atmosphere Community Climate Model with ionosphere and thermosphere extension (WACCM-X) version 1.2.2. Helium has been added to the neutral mass densities, from which the scaling factors are calculated, with an adapted version of MSIS-00 which uses the WACCM-X temperatures",
  "quality": "",
  "docs": [],
  "project": {
    "catalogue_url": "",
    "title": "Space Weather Instrumentation, Measurement, Modelling and Risk (SWIMMR) - Thermosphere",
    "description": "Space debris is emerging as a key problem with the potential to cause major socio-economic impacts. It is currently estimated that there are over 900,000 pieces of debris greater than 1 cm orbiting the Earth. Collisions with such objects can destroy satellite instruments, subsystems and even the satellite itself. On average the United States Strategic Command issue ~900 Conjunction Data Messages (providing expected miss distance, estimated probability of collision, time of closest approach, and closest approach relative position and velocity) to users every day.",
    "PI": {
      "firstname": "Matthew",
      "surname": "Brown"
    },
    "funder": "NERC",
    "grant_number": "NE/V002643/1"
  },
  "instrument": {
    "catalogue_url": "",
    "title": "",
    "description": ""
  },
  "computation": {
    "catalogue_url": "https://catalogue.ceda.ac.uk/uuid/f15494ffdc4c479686d88acd9540d1d0",
    "title": "",
    "description": ""
  }
}