Southern Ocean Large Area Carbon Export

Solace Workshop: November 16-18, 2021. IMAS, Hobart, Tas.

Rationale – Presentation of a voyage overview, initial results from the 3 sites occupied during the SOLACE voyage, exploration of synergies between datasets and groups, links into other JETZON activities (https://www.jetzon.org/  ), followed by breakout group discussions to develop datasets and cross-linkages further.

Timetable and venues (all times Hobart, local – AEDT)

Tuesday 16 November 2021 to Thursday 18 November 2021

Aurora Lecture Theatre, IMAS (16-18 November)

Breakout room Rori Seminar Room (17 and 18 November)

Morning and afternoon teas and  lunches provided

BBQ on Wednesday 17 November 2021

Programme

Venue 101 Aurora Lecture Theatre, IMAS

Tuesday, 16/11/2021 

9:00 Introduction and welcome to Country  Philip Boyd (IMAS)

0905  Workshop opening Nathan Bindoff (AAPP)

0915 h SOLACE a short summary  Philip Boyd (IMAS)

0930 h   Regional Physics – a satellite overview Benoit Legresy (CSIRO Hobart)

1000 h Regional Biology – satellite overview David Antoine (Curtin University)

1030 h Coffee

1100 h  SOTS and SOLACE N site – the wider picture Elizabeth Shadwick (CSIRO/AAPP)

1130 h SOLACE N – the subantarctic site – physical and biological overview Tyler Rohr (CSIRO/AAPP)  Lennart Bach (IMAS)

1200 SOLACE N – chemical overview Michael Ellwood (ANU)

1230 – 1330 Lunch

1330  SOLACE N – bio-optics David Antoine  (Edith Cowan)

1400 SOLACE N phytoplankton processes  Robert Strzepek and Pauline Latour (AAPP/IMAS)

1430  SOLACE N  Carbonic anhydrase knockout experiments on SO phytoplankton communities Sam Eggins (ANU)

1450 SOLACE N  Mesozooplankton stocks and processes Svenja Halfter (IMAS)

1510 Coffee

1530 h SOLACE N  Particle biochemistry Fraser Kennedy (IMAS)

1550 h SOLACE N Particle flux and microbial remineralisation Matthieu Bressac (IMAS/LOV, France)

1620 h  SOLACE N Profiling float trends including UVP  Leo Lacour (IMAS/LOV, France)

1650 h Summary and plans for day 2 Philip Boyd (IMAS)

17:00 Close and refreshments (Preachers)

 Wednesday, 17/11/2021

 9:00-17:00 

0900 h WHOI OTZ (Ocean Twilight Zone) summary of EXPORTS N Atlantic Heidi Sosik (WHOI, USA)

0930 h SOLACE OTZ summary  Ben Scoulding (CSIRO)

1000 h    SOLACE OTZ future work – Katy Baker (IMAS)

1010 h General Discussion of SOLAS N site findings

1030 h coffee

1100 h SOLACE S polar sites physical and biological overview Tyler Rohr (CSIRO/AAPP)  Lennart Bach (IMAS)

1130 h SOLACE S– chemical overview Michael Ellwood (ANU)

1200 h SOLACE S – bio-optics David Antoine  (Curtin University)

1230 h lunch

1330 h SOLACE S phytoplankton processes  Robert Strzepek and Pauline Latour (AAPP/IMAS)

1400 h SOLACE S  Mesozooplankton stocks and processes Svenja Halfter (IMAS)

1430 h SOLACE S  Particle biochemistry Fraser Kennedy (IMAS)

1500 h SOLACE S Particle flux and microbial remineralisation Matthieu Bressac (IMAS/LOV, France)

1530 h coffee

1600 h  SOLACE S Profiling float trends including UVP  Leo Lacour (IMAS/LOV, France)

1630 h  Discussion

1800 h  Close and BBQ at IMAS

Thursday, 18/11/2021

9:00-17:00

0900 h  Summary of the US EXPORTS mission Dave Siegel (UCSB, USA)

0930 h Glider trends at N SOLACE site  – physics and biogeochemistry Andy Thompson (CALTEC, USA)

1000 h  Discussion and breakout groups  (Aurora and  adjacent Flex spaces)

1030 h coffee

1100 h breakouts such as – Connecting surface and subsurface ocean processes during SOLACE; quantifying multi-faceted C pumps – BGP and PIPS; Weaving the detailed SOLACE datasets into the wider SOTS subantarctic context

1230 h lunch

1330 h breakouts

1500 h – summary of breakouts

1530 h close

The Voyage

The aim of the voyage is to develop an approach to quantify the changing effectiveness of CO2 sequestration by the biological pump that can be implemented using remote-sensing of the ocean surface by satellites and it’s interior by autonomous vehicles (especially BIO-ARGO profiling floats).

Flow chart illustrating how plankton community structure affects the properties of sinking organic particles and ultimately the strength and efficiency of the biological carbon pump.