Data Availability
Full cruise CTD and macronutrient data for cruises IN2018V_02 and IN2018V_04 are available from CSIRO (https://www.cmar.csiro.au/data/trawler/). Full macronutrient and CTD data from the ACE transect are available from the ACE collection on Zenodo (https://zenodo.org/communities/spi-ace). Full macronutrient and CTD data from the M77/4 cruise are available from the Pangaea repository (https://www.pangaea.de/). Full Line P macronutrient and CTD data are available from the Line P website (http://www.waterproperties.ca/linep/data.php). Shipboard incubation data are available in Tables S1-S4. Pore water data are available in Table S5 and sediment data are available in Table S7. New and literature data used for the isopycnal compilation are available in the supplemental material (Tables S9 and S10). Editorial note: all new data in this manuscript will also be made available as an open access dataset in the Zenodo repository once a final decision is reached on the manuscript, and the data availability statement will be updated to reflect this. For review purposes, all data are also included here.