Description £41,344 - £45,479 - the band minimum is the normal starting pay for those new to a role. In exceptional circumstances, where relevant skills and experience can be demonstrated, a higher starting salary may be offered. We will give full consideration to requests for flexible and part-time working, such as reduced hours, compressed hours or job sharing. We also offer hybrid working and recognise the many benefits this brings. The nature of the role will determine if flexible and hybrid working options are possible. Interview date - 09th July 2025 British Antarctic Survey (BAS) is looking for an exceptional Earth System Modeller to join our Ice Dynamics and Palaeoclimate team. The postholder will contribute to two major international programmes: the EU-funded ₠15M 'Past2Future' (P2F) project and the NZ-led $20M MBIE-ASIS (Antarctic Sea-Ice Switch) initiative. You'll focus on modelling sea ice in the Ross Sea under both past and future climates using the UK Earth System Model (UKESM), including its new water tracer and isotope-enabled configurations. This will improve understanding of feedbacks, freshwater pathways, and links between sea ice and regional ice core records. Outputs will support future climate assessments, conservation planning (e.g. CCAMLR RSRMPA 2027), and advance our understanding of Antarctic sea ice during warm periods. There is strong support for the postholder to develop their own research profile and publish results in high-impact journals. As a valued member of our team, you'll be eligible for the following benefits: 30 days annual leave plus bank holidays and 2.5 privilege days Excellent Civil Service pension (with 26% or more employer contribution, depending on your band) 24/7 access to an employee assistance programme (EAP - including support with physical, mental, social, health, and financial issues) Flexible and family-friendly working opportunities Cycle to work scheme Access to discounted shopping on a range of retail, leisure, and lifestyle categories and much more Some of your main responsibilities will include: • Analysing new UKESM simulations focused on Ross Sea sea ice under past (Holocene and interglacial) and future scenarios • Investigating sea-ice mechanisms and attributing changes to specific forcings • Applying UKESM water tracer capabilities to understand freshwater pathways and feedbacks • Running isotope-enabled model experiments to explore links with Antarctic ice core records • Collaborating with international partners in ASIS and P2F programmes and contributing to key programme objectives • Publishing in peer-reviewed journals and presenting at national/international scientific meetings • Engaging with the Earth System Modelling Group at BAS to align with broader project goals • Developing an independent research profile, seeking funding opportunities, and supervising students For the role of Earth System Modeller: Antarctic Sea Ice, we are looking for somebody who has: • A PhD or equivalent experience in physics, atmospheric or oceanic sciences, Earth sciences, or applied mathematics • Expertise in using UK Earth System Models, including experience with UKESM and its sea ice model • Expertise in sea ice and polar climate • Excellent numerical skills • Proven ability in analysis of climate model output, particularly sea ice • Experience using Linux/Unix environments for running models and data analysis • Experience working as part of a larger team • Proven ability to manage self and resources to meet objectives and deadlines • Track record of publishing in quality peer-reviewed journals • Excellent written and oral communication skills • Proficient in written and spoken English • Ability to show initiative and tackle problems independently • Ability to work collaboratively with researchers at other institutions, particularly internationally Desirable attributes include: • Postdoctoral experience • Experience with water tracers in climate models • Proven track record in setting up model simulations and related problem solving/debugging • Knowledge of Python and Met Office Iris software package • Experience in supervising MSc or PhD students If we've just described you, we'd love to hear from you. Apply now at https://www.bas.ac.uk/jobs/vacancy/earth-system-modeller-antarctic-sea-ice-bas-25-80/