# HPC costing for an ARIA proposal – UKESM2 with water isotope tracers on Cirrus

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/hpc-costing-for-an-aria-proposal-ukesm2-with-water-isotope-tracers-on-cirrus/2216>\
**Category:** Uncategorized\
**Created:** [9 November 2026 14:15 UTC](https://cms-helpdesk.ncas.ac.uk/t/hpc-costing-for-an-aria-proposal-ukesm2-with-water-isotope-tracers-on-cirrus/2216 "2026-11-09T14:15:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![irealm37](https://avatars.discourse-cdn.com/v4/letter/i/779978/32.png) [@irealm37](https://cms-helpdesk.ncas.ac.uk/u/irealm37)\
**Post date:** [9 November 2026 14:15 UTC](https://cms-helpdesk.ncas.ac.uk/t/hpc-costing-for-an-aria-proposal-ukesm2-with-water-isotope-tracers-on-cirrus/2216/1 "2026-11-09T14:15:39Z")

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We are preparing a full proposal to ARIA’s Forecasting Tipping Points Phase 2 programme (deadline 2 December 2026), led by the British Antarctic Survey. The project will run UKESM2 with water isotope tracers (δ18O and δD), building on the water tracer work in ARIA’s EcoICE project, over 36 months from about March 2027. We need to include HPC costs in the budget and would be grateful for your advice on:

1. The charge per CU we should use (partner or non-partner rate), and whether VAT applies.

2. Our current estimate: about 65 CU per model year for UKESM2 with water tracers (an upper estimate), and probably more than 50 kCU in total, plus at least 80 TB of JASMIN storage. Does this seem reasonable, and is there anything else we should include?

If someone else would be better placed to answer, please let me know.

Many thanks, Irene Malmierca-Vallet British Antarctic Survey

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**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\
**Post date:** [10 November 2026 09:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/hpc-costing-for-an-aria-proposal-ukesm2-with-water-isotope-tracers-on-cirrus/2216/2 "2026-11-10T09:01:32Z")

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Taken to email.

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**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\
**Post date:** [10 November 2026 09:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/hpc-costing-for-an-aria-proposal-ukesm2-with-water-isotope-tracers-on-cirrus/2216/3 "2026-11-10T09:01:40Z")

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Closed on 10 November 2026 09:01 UTC