The Polarstern expedition PS136 started on 22 May 2023 in Bremerhaven, Grmany and led to the Fram Strait between Greenland and the Svalbard archipelago. The expedition wanted to contribute to various large national and international research and infrastructure projects (FRAM, MUSE, iFOODis, HiAOOS, ICOS-D, SIOS) as well as to the new research programme „Changing Earth – Sustaining our Future” („Erde im Wandel – Unsere Zukunft nachhaltig gestalten”) of the Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research (AWI). The cruise ended on 19 June 2023 in Tromsø, Norway.
Source: https://epic.awi.de/id/eprint/57718/1/Expeditionsprogramme_PS136.pdf
To note, the Alfred Wegener Institute will no longer process collectors mail send to the Polarstern due to the "ever-increasing workload". This is very sad news for any Polarmail collector.
Stamp:
Definitive Issue - "Flowers" - Issued: 03-01-2005