<html aria-label="message body"><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">It depends what resolution you want to run.<div><br></div><div>3-degree global, e.g., https://github.com/MITgcm-contrib/ecco_darwin/tree/master/v05/3deg</div><div>should run fine on your laptop</div><div><br></div><div>1-degree ECCO setup, e.g., https://github.com/MITgcm-contrib/llc_hires/blob/master/llc_90/ecco_v4r5/readme_v4r5_eady.txt</div><div>should run fin on a 32-core workstation with 256 GB</div><div><br></div><div>Dimitris</div><div><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Nov 21, 2025, at 4:51 PM, QI Yuanzhi <qi.yz@outlook.com> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><span style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">Dear MITgcm community, </span><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;"></span><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">My name is Yuanzhi Qi. I am planning to use MITgcm to simulate the distribution and transport of radioactive tracers in the ocean. Specifically, I aim to model the historical concentration changes of Iodine-129 (I-129) in the Arctic Ocean over the past 80 years. This work is intended to serve as a foundation for future global-scale I-129 simulations and, potentially, for using I-129 as a tracer to study the broader marine iodine cycle. </div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">My main question is: Is it feasible to run such 3D simulations on a single workstation? If so, could you provide specific hardware recommendations—such as CPU, GPU, RAM, and storage?</div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">For instance, should I consider a CPU with 16 cores, 32 cores, or more? Would 128 GB of RAM be sufficient, or would I need 256 GB or more?</div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">Additionally, if there are any example setups or configurations for similar oceanic passive tracer studies beyond the User Manual, I would be very grateful for any references or pointers.</div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">Thank you in advance for your guidance.</div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">Best regards,</div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div><div dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; text-align: left; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt;">Yuanzhi</div><br class="Apple-interchange-newline"></div></blockquote></div><br></div></body></html>