Subject Areas: Chemistry and Materials  Earth Sciences and Environment  Engineering and Energy  Mathematics and Computer Science  All 
Cloud physics

Porting OptClim Optimisation system to ARCHER2

ARCHER2-eCSE04-07 : Prof Simon Tett (University of Edinburgh)

Subject Area: Earth Sciences and Environment          Published : 2022-10-07

OptClim is a software framework that uses optimisation algorithms to tune climate models. This project has enabled use of the OptClim software on ARCHER2, and enhanced the code to work with a wide range of models. This work will reduce the uncertainty in various climate and earth system models. Read more...

Climatological (30 year mean) annual mean precipitation

Porting, Testing, Optimising, and Configuring the Community Earth System Model (CESM2) on ARCHER2

ARCHER2-eCSE03-06 : Dr Ioana Colfescu (National Centre for Atmospheric Science)

Subject Area: Earth Sciences and Environment          Published : 2022-10-05

The Community Earth System Model 2 (CESM2) is a world-leading global climate model that is widely used by the international research community for state-of-the-art simulations of the Earth’s past, present and future climate system. This project aimed at porting, optimising, testing, and validating the model’s key configurations and making them available to UK researchers through ARCHER2, thus enabling them to use a state-of-the-art climate model on a next-generation supercomputing service. Prior to this work, before a user could run their own simulations on ARCHER2, they would face a large amount of technical set-up work, at the expense of time spent on their research. This project allows UK researchers using ARCHER2 to confidently and reliably use CESM2 with minimum efforts. Read more...

A goal-oriented adapted mesh for a tidal farm simulation.

Goal-oriented mesh adaptation for Firedrake

ARCHER2-eCSE03-04 : Prof Matthew Piggott (Imperial College London)

Subject Area: Earth Sciences and Environment          Published : 2022-10-07

Mesh adaptation can be a very powerful tool for improving the accuracy and/or efficiency of numerical simulations, e.g. for geoscientific modelling. However, it is still not widely used, largely because it requires users to have considerable experience and in-depth understanding. This eCSE project produced a new goal-oriented error estimation module, Pyroteus, which enables numerical modellers to use advanced techniques, without requiring expert knowledge. All that is required from the user is a set of instructions for how to run the numerical model and compute the user-specified Quantity of Interest, both of which are typically straightforward. With these, Pyroteus is able to perform mesh adaptation in a fully automated sense. To support the development of Pyroteus, this project also involved extending the mesh adaptation functionalities of the scientific software packages PETSc and Firedrake, upon which Pyroteus depends. Read more...

sea level contribution of the glaciers of the Amundsen Sea Embayment

Optimising MITgcm on ARCHER2: efficient numerical simulation and data assimilation tools for studying the ocean, atmosphere, and cryosphere

ARCHER2-eCSE02-06 : Dr Emma JD Boland (British Antarctic Survey)

Subject Area: Earth Sciences and Environment          Published : 2022-10-10

MITgcm is a state-of-the-art general circulation model used to enhance understanding of the atmosphere and ocean and their interactions with land- and sea-ice. This project involved the porting to ARCHER2 of three exemplar models that are built on the MITgcm core, two addressing the Amundsen Sea in the Antarctic and one global ocean state estimate. These exemplar models were then optimised, achieving a speed-up of the order of 2-fold in a widely used setup. This work is already helping researchers address more complex problems with their models, as well as allowing for more efficient use of valuable computer resources. Read more...

Modelled ozone

Reducing UM-UKCA data output using flight-track simulation

ARCHER2-eCSE02-02 : Dr Nathan Luke Abraham (National Centre for Atmospheric Science (NCAS) & University of Cambridge)

Subject Area: Earth Sciences and Environment          Published : 2023-01-25

The UK Met Office Unified Model (UM) is a numerical model of the atmosphere used for both weather and climate applications. The main goal of this eCSE project was to allow for easy comparison between atmospheric model data, obtained from the United Kingdom Chemistry and Aerosols model used as part of the Unified Model (UM-UKCA), and observed data measured from research aircrafts. Prior to this work, this task involved the output of a large amount of model data, of which only a small part was used. Post-processing of this large dataset was very time-intensive and required the user to have in-depth knowledge of aircraft data, as well as technical and coding skills. This project developed a stand-alone “flight-track simulator” code which deals with all the required data processing while the model runs, greatly reducing the data storage requirement. The processed model data is also directly available as soon as the model completes, making it much quicker and easier for a wide variety of users to benefit. Although the flight-track simulator code was originally designed exclusively for use with UM-UKCA, it has been developed as a stand-alone code which can be used with any other atmospheric and climate model, therefore benefiting the wider atmospheric science community. Read more...