Castellani, Giulia

Crawford, A.

Flores, Hauke

Hoppmann, Mario

Karcher, Michael

Kauker, Frank

Kim, Jung-Hyun

Nicolaus, Marcel

Stroeve, Julienne

Valcic, Lovro

Veyssiere, Gaelle

Wilkinson, J. P.

Yang, Hu

English

Electronic Publication Information Center

Autonomous measurements of physical and ecological key parameters in the Arctic OceanGiulia Castellani, H. Flores, L. Valcic, J. P. Wilkinson,                                     M. Hoppmann, M. Karcher, J. Stroeve,                                  G. Veyssiere, M. Nicolaus, J-H. Kim,                            E-J. Yang, F. Kauker, A. CrawfordAcknowledgementsWe thank the captain and the crew of the RV Araon, and KOPRI, for their support in the deployment and recovery of the buoys. We thank the captain and crew of RV Polarstern, and the teams OCEAN and ECO, for their support during MOSAiC. The project EcoLight is funded through the NERC/BMBF Changing Arctic Ocean Programme. Buoys have been developed at Bruncin Ltd. Croatia EcoLight[M. Hoppmann]The current drastic and rapid changes in the Arctic are leading to a reduction in sea-ice extent and volume, especially in summer.Seasonal sea-ice “dynamics” (timing, duration and maximum extent) is also changing, with an earlier ice edge retreat and a later ice edge advance Changes in sea ice lead to changes in habitat, food type and availability, and species distribution, thus affecting ecosystem dynamics and biogeochemical cycling[D. Lannuzel et al., 2020, NCC]Buoys clusterCTDIce mass balanceSnowZooplanktonRadiationFuture Arctic research needs a holistic coupled physical-biological approach and continuous year-round observations[Credit: M. Hoppmann][M. Hoppmann]iBOB: Incoming and            transmitted solar            radiationIn AIRIncoming solar radiationAir pressureInternal tiltInternal temp.CameraIn WATERLight transmitted through the sea iceConductivity at 0.5m depth below sea-ice bottomConductivity, Fluorometer, Oxygen Optode at 2.2m below sea-ice bottomCamera[M. Hoppmann][L. Valcic]AZFP: Zooplankton            distribution            under the iceIn AIRApogee shortwave incoming solar radiationAir pressureInternal temperatureInternal tiltCameraIn WATERASL AZFP at 1.5m below sea-ice bottomTriLUX Flourometer at 1.5m below sea-ice bottomConductivity at 1.5m below sea-ice bottomCamera45067125200[kHz][M. Hoppmann][L. Valcic]Deployments: Beaufort/Chukchi sea in August 2018 and August 2019 from the                           RV Araon (KOPRI)[G. Veyssiere et al., Under Rev., F. Mar. Sci.]Deployments: Beafurt/Chukchi sea in August 2018 and August 2019 from the                           RV Araon (KOPRI)Both years a polar bear destroyed the buoys, in 2019 a full recovery of the sensors was possible[G. Veyssiere et al., Under Rev., F. Mar. Sci.]Deployments: MOSAiC September 2020, 89.05°N 107.10°E[M. Hoppmann][Meereisportal.de]iBOB data show incoming, transmitted and reflected radiation[H. Flores et al., In Prep.]AZFP data show the position of the pycnocline ...… and the distribution of organisms under the ice (high scattering)[H. Flores et al., In Prep.]11580[Sv]Transition into polar night: at such high latitudes it is a matter of few days. Incoming light decreases from 10 W/m2 to zero ... The zooplankton reacts to the changes in light and moves upwards in the top ~5m under the ice, above the pycnocline … [H. Flores et al., In Prep.]Eddies: data from an oceanographic buoy deployed together with the iBOB and AZFP buoys allow the observation of special features and thus the investigation of how water properties and dynamics may affect zooplankton distribution[H. Flores et al., In Prep.]Major challengesPolar bears love them!!Icing of sensorsRidging and rafting of iceCommunication issues for data transmittanceInternal software issuesSometimes we don’t know, we are not there!Main improvementsHolistic observations of the coupled physical-biological system Capture transition phases when we are usually not thereObservation of particular events (eddies) Possibility to transmit data at (almost) real timeRemote monitoring of the battery levelPossibility to remotely change the sampling settings in order to optimize battery consumption Future improvementsEverything must float!Wildlife resistant solutionsIridium Certus integrationMore powerful battery for winter samplingDeploy more clusters to capture spatial variabilityTowards the development of multidisciplinary buoys

Autonomous measurements of physical and ecological key parameters in the Arctic Ocean

https://epic.awi.de/id/eprint/56149/1/Presentation_Arctic_Frontiers_Castellani_Final.pdf

Autonomous measurements of physical and ecological key parameters in the Arctic Ocean

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