INSIDE THIS ISSUE:
by Colin Jones.
|In April 2018 we completed the scientific and technical development of UKESM1 and started a number of baseline simulations as part of the 6th Coupled Model Intercomparison Project (CMIP6). This newsletter outlines early results from UKESM1 covering the CMIP6 DECK and a number of historical simulations, as well as a range of more targeted experiments used to characterize the model’s fundamental behaviour. Read more…|
by Alistair Sellar, Colin Jones, Chris Jones and Lee de Mora.
|The UKESM1 DECK and historical runs are now in full swing and we have begun an initial analysis of first results. Early indications are that the model performs well, with a number of interesting features. In this article we present some analysis of multi-decadal ocean-atmosphere variability in the UKESM1 spin-up and piControl, some findings pertaining to carbon uptake in the 1% CO2, transient increase runs and finally, early results from the UKESM1 historical ensemble. Read more…|
by Colin Jones, Jane Mulcahy, Stephanie Woodward, Fiona O’Connor and Till Kuhlbrodt.
|The core of the UKESM1 atmosphere is the GA7.1 version of the Unified Model Global Atmosphere. In addition to GA7.1, UKESM1 also includes the UKCA stratosphere-troposphere interactive chemistry scheme, which predicts a number of key atmospheric greenhouse gases, as well as the chemical oxidants that lead to formation of atmospheric aerosol. Furthermore, a number of aerosol and chemical emissions that, are time-invariant and based on observations in the physical model HadGEM3-GC3.1 are interactively predicted and coupled to other components of UKESM1, allowing a broader spectrum of Earth system interactions and feedbacks to be represented. Read more…|
by Andrew Yool, Julien Palmiéri, Lee de Mora, Till Kuhlbrodt and Colin Jones.
|As it stores the majority of the excess heat and carbon dioxide associated with climate change (both ongoing and into the future), the World Ocean is a critical component of the Earth system – and therefore UKESM1. Any imbalances in how the ocean interacts with other components of the modelled Earth system can translate into discrepancies between the real climate we see, and the climate we simulate within UKESM1. Here we take a look at the dynamics, chemistry and biology going on below the ocean surface in UKESM1. Read more…|
by Andy Wiltshire and Chris Jones.
|A key aspect of Earth System Models that distinguishes them from their Global Climate Model counterparts is the representation of biogeochemical processes. The most crucial to understanding climate change is the carbon cycle. Both the land and oceans currently act as sinks for anthropogenic CO2 from fossil fuel emissions and land use change. In fact, only around 50% of anthropogenic CO2 remains the atmosphere, the rest is taken up by the land and ocean, through plant growth (CO2 is a plant fertiliser) and dissolution into the oceans. The ability to accurately capture these processes is crucial for Earth System Models such as UKESM1. Read more…|
by Jeremy Walton, Alistair Sellar, Yongming Tang, Marc Stringer, Richard Hill, Julien Palmieri, Rich Ellis, Grenville Lister, Colin Jones.
|Version 1 of the UK Earth System Model (UKESM1) has been in development for the past five years. Built as a joint venture by the Met Office Hadley Centre and the Natural Environment Research Council (NERC), UKESM1 consists of the HadGEM3-GC3.1 coupled physical climate model, plus additional components that model key biogeochemical, chemistry, aerosol and vegetation processes. Plans have been developed for the release of UKESM1 to the NERC research community. The model has already been ported to the shared MONSooN platform in order to aid collaboration between the Met Office and NERC, and will soon be made available on ARCHER, the UKRI national platform. As with other models, CMS, in collaboration with the UKESM core group, will provide front-line support for UKESM1 after its release later this year. Read more…|
9-10 July 2018 – UKESM-LTSM project annual meeting, UK Met Office, Exeter:
This year, the LTSM project celebrates its annual meeting at the Met Office Headquarters in Exeter. The meeting will run for two full days. Day 1 will include a special session dedicated to the UKESM1 model release, plus a number of presentations on broader research occurring within the UKESM-LTSM, with invited speakers and posters from the contributing NERC centres. Day 2 will be centred around project business, specific break groups and future science plans (Download the meeting agenda with links to the meeting presentations here).
RECENT PAST EVENTS
26 March 2018 – Data Sciences for Climate and the Environment – The Alan Turing Institute, London:
This one-day workshop was focused on how new tools being developed in data science can be applied to questions relating to climate and the environment in order to help address the challenges which our society is facing on a rapidly changing planet. Collectively, we are modelling and monitoring our planet better than ever as a result of sustained efforts from the climate modelling community and space agencies. Climate and weather models can now be run at finer spatial resolutions, enabling more realistic simulations of smaller scale processes (e.g. tropical cyclones in the atmosphere or eddies in the ocean) that can have severe impacts on our planet. At the same time there is a rapid growth in the number of satellites orbiting the Earth, with a significant fraction of these satellites dedicated to Earth Observation using a variety of sensors working at different electromagnetic frequencies. Our ability to store, process and efficiently share the vast amounts of data that are produced by the modelling and remote sensing communities is a pre-requisite for the effective functioning of these large research programmes.
The workshop attended by UKESM core group member Jeremy Walton featured five keynote speakers from the US and the UK who presented on their work on producing, processing, sharing and analysing climate data. Jeremy described climate modelling using UKESM1 and the UK efforts to produce, convert and manage climate model data for CMIP6. The workshop concluded with a panel dialogue between the speakers and members of the audience.
4-8 June 2018 – 4th International Symposium on The Effects of Climate Change on the World’s Oceans – Washington, USA:
Team member Andrew Yool recently attended the 4th International Symposium on The Effects of Climate Change on the World’s Oceans (4-8 June 2018), organised by Pacific ICES. Andrew presented work on size-structured benthic communities, and how these will potentially change into the future using scenarios of change provided by NEMO-MEDUSA (in a slightly earlier form to that used in UKESM1). In summary, these communities are entirely dependent on food imports from the near-surface plankton, so changes in the activity of the latter (especially in how material is exported downwards from it) are key. The benthic model used in this work is not currently coupled to UKESM1, but there are plans for the inclusion of this submodel as part of ESM LTSM development activities for MEDUSA.