The Met Office Unified Model Global Atmosphere 7.0/7.1 and JULES Global Land 7.0 configurations

Abstract. We describe Global Atmosphere 7.0 and Global Land 7.0 (GA7.0/GL7.0), the latest science configurations of the Met Office Unified Model (UM) and the Joint UK Land Environment Simulator (JULES) land surface model developed for use across weather and climate timescales. GA7.0 and GL7.0 include incremental developments and targeted improvements that, between them, address four critical errors identified in previous configurations: excessive precipitation biases over India, warm and moist biases in the tropical tropopause layer (TTL), a source of energy non-conservation in the advection scheme and excessive surface radiation biases over the Southern Ocean. They also include two new parametrisations,…

• DF
  Department for Environment, Food and Rural Affairs, UK Government

  Award: GA01101
• SR
  Sight Research UK

  Awards: NE/J024252/1, NE/R011222/1, NE/N017978/1
• MO
  Met Office

  Award: GA01101
• NE
  Natural Environment Research Council

  Awards: NE/J024252/1, NE/N017978/1, NE/R011222/1