Early Season at Palmer

2018 Spring Phytoplankton Bloom!

After 30 hours of travel from the US to Punta Arenas, Chile, and then a four-day transit on R/V Laurence M. Gould across the Drake Passage, Marie Zahn and Anna Bashkirova representing the Schofield team arrived on October 6^th, 2018 to Palmer Station.

Marie Zahn (left) and Anna Bashkirova (right) aboard RHIB Hadar.

Typically foul weather conditions inhibit early season sampling, but this year’s open water and manageable winds allowed us to completely capture the first spring phytoplankton bloom, peaking around November 19th.

Wind speed decreased after the first week of November and sea ice retreated, allowing sufficient sunlight and water column stratification for a bloom. Stratification was especially pronounced November 15-19 and best observable in salinity and density values from CTD profiles collected at two locations: Stations B (nearshore) and E (offshore). This was accompanied by a steady rise in fluorescence, primary production, and chlorophyll concentrations, all three reaching a peak on November 19th. Strong winds beginning November 18^th soon mixed the water column, quenching the bloom.

Our measurements of primary production (mg C/m²/day) and chlorophyll concentrations (mg/m²) dropped down after the spring bloom and have remained steady since. Fluorescence profiles also reflect the spring bloom (reaching nearly 10 mg/m³ at the chlorophyll maximum) and subsequent leveling-off to ~3 mg/m³ for both Stations B and E.

Temperature (˚C), salinity (ppt), density (kg m-3), and fluorescence (mg m-3) profiles against depth in meters (L-R) for six November and December 2018 sampling events at Station B (top row) and Station E (bottom row).

Depth-integrated primary production (mg C/m2/day) values from Station B (blue) and Station E (orange) for November and December 2018.

Depth-integrated chlorophyll (mg/m2) values from Station B (blue) and Station E (orange) for November and December 2018.

The science team for 2019

Rutgers Sends All Female Field Team to Antarctica for the 27th year of the Palmer LTER

The 27th Annual research cruise of the Palmer Long Term Ecological Research (LTER) (www.pal.lternet.edu) along the Western Antarctic Peninsula set sail on January 5, 2019 and will continue until February 7, 2019. The LTER annual cruise will be surveying the Western Antarctic Peninsula, studying the entire food web – from phytoplankton and bacteria to krill and other zooplankton to whales and penguins – working to understand the changing ecosystem and the influences climate change is having along the peninsula. The Palmer Station component of the LTER project, also in its 27th year, also adds a seasonal scale to the study, running from October 2018 to April 2019.

This season, the phytoplankton component of the Palmer LTER, headed by Dr. Oscar Schofield, has an all female field team! Led by Field Team Lead, Nicole Waite (RUCOOL Technician), team members include: Dr. Kim Thamatrakoln (DMCS Assistant Research Professor), Emily Slesinger (RUCOOL graduate student), Samantha Schofield (Rutgers undergraduate student), and Hailey Conrad (Rutgers undergraduate student). The Palmer Station field team is lead by Schuyler Nardelli (RUCOOL graduate student) who is also doing her dissertation research with the Palmer LTER and Marie Zahn (field technician). Not pictured, Anna Bashkirova (Rutgers undergraduate) was also a key member of the field team at Palmer Station from October to December 2018.

Picture Caption: From L-R: Kim Thamatrakoln, Samantha Schofield, Emily Slesinger, Marie Zahn, Schuyler Nardelli, Hailey Conrad, Nicole Waite. Not pictured: Anna Bashkirova