DOMINO Dynamics of benthic organic matter fluxes in polar deep-ocean environments

DOMINO旨在将水柱颗粒输出与极地深海环境海底的有机碳通量联系起来。这项研究的重点是根据现场测量的底栖生物摄氧量确定的底栖生物通量。通量的空间分布以及它们的时间动态进行了调查方面的浮游植物的季节性出口，但也相对于小规模和区域分布的底栖动物。在海洋生物泵的下端有一个碳汇，这种流向海底的通量在自然和潜在的人工引起的二氧化碳下降和沉积碳固定方面发挥着关键作用。DOMINO的目的不仅是通过高质量的实地测量来提高数据覆盖面，而且还促进与海洋学、海洋学和底栖生物学的多学科联系：在北极星号ANT XXIV/2号航行期间，对底栖-水层耦合以及地球化学微梯度与底栖生物之间的相互作用进行了调查。将分析第一年取得的实地结果和第二次实地活动（ANT-XXV/3、LOHAFEX）取得的结果，并将密切联系海洋生物学和底栖生物学研究所-ANDEEP方法的结果来描述海洋区域。此外，在第二次航行期间，将进行水柱实验，以跟踪人为引起的浮游生物大量繁殖产生的植物碎屑的深层输出和沉积情况。

DOMINO aims to link water column particle export with organic carbon fluxes to the seafloor of polar deep-sea environments. The study focuses on benthic fluxes determined from in situ measured benthic oxygen uptake. The spatial distribution of fluxes as well as their temporal dynamics is investigated in respect to seasonal export of phytoplankton but also with respect to small scale and regional distribution of benthic fauna. Comprising a carbon sink at the lower end of the ocean’s biological pump, such fluxes to the seafloor, play a key role in respect to natural as well as potential artificially induced CO2 drawdown and sedimentary carbon fixation. DOMINO not only aims to improve the data coverage by high quality in situ measurements but also fosters the multidisciplinary linkage to planktology, oceanography, and benthos biology: During the Polarstern cruise ANT XXIV/2 , investigations on the bentho-pelagic coupling as well as on the interactions between geochemical microgradients and benthic organisms have been conducted. Field results obtained during the first year and an those obtained during a second field campaign (ANT-XXV/3, LOHAFEX) will be analysed and ocean regions will be described in close linkage to biochemical an benthos biological results of the the SYSTCO-ANDEEP approach. Furthermore, during the second cruise water column experiments will be performed to follow the deep export and sedimentation of phytodetritus originating from an artificially induced plankton bloom.