Welcome to the JULES land surface model.

JULES (the Joint UK Land Environment Simulator) is a community land surface model that is used both as a standalone model and as the land surface component in the Met Office Unified Model. JULES is a core component of both the Met Office's modelling infrastructure and NERC's Earth System Modelling Strategy. JULES is a major part of the UK's contribution to global model intercomparison projects (e.g. CMIP6) and is placed firmly at the cutting edge of international land surface modelling because of continual science development and improved accessibility (JULES can even now be run 'in the cloud' via MAJIC).

By allowing different land surface processes (surface energy balance, hydrological cycle, carbon cycle, dynamic vegetation, etc.) to interact with each other, JULES provides a framework to assess the impact of modifying a particular process on the ecosystem as a whole, e.g. the impact of climate change on hydrology, and to study potential feedbacks.

          Our Vision for the JULES System (Sep 2016): PDF icon JULES_vision.pdf

JULES is available to anyone for non-commercial use, free of charge. This has led to a large and diverse community from across the globe using JULES to study land surface processes on a wide variety of temporal and spatial scales. The JULES community has regular meetings where researchers using JULES can present results and discuss issues with their peers over a glass of wine.

The development of JULES is governed by a community process, and is presided over by committees comprised of representatives from organisations providing significant resources for the ongoing development of JULES.