Table of Contents

• Coverage
• Dataset Description
  • Methods & Sampling
  • Data Processing Description
• Data Files
• Parameters
• Instruments
• Deployments
• Project Information
• Program Information
• Funding

Bacteria Chlorophyll a in Ice Brine

Contributor:
Dr. Christian Fritsen
University and Community College System of Nevada
Desert Research Institute
Div. of Earth and Ecosystem Sciences
2215 Raggio Parkway
Reno, NV 89512
Office: 775/673-7487

Methods:
Brine samples were collected from auger holes that were drilled into sea ice using a 2 inch kovacs coring auger. Brine that flowed into the bottom of the hole was collected using a tygon tubing attached to a 60 cc syringe. Cholorophyll-a concentrations were determined using the techniques as reported in previous submissions of ice core and water column data. Multiple sample numbers reflect replicate samples taken from the same hole.

updated: April 10, 2007

Brine samples were collected from auger holes that were drilled into sea ice using a 2 inch kovacs coring auger. Brine that flowed into the bottom of the hole was collected using a tygon tubing attached to a 60 cc syringe. Cholorophyll-a concentrations were determined using the techniques as reported in previous submissions of ice core and water column data. Multiple sample numbers reflect replicate samples taken from the same hole.

#   Ice brine chlorophyll-a concentrations from ice core holes
#            Southern Ocean, GLOBEC
#   C. Fritsen, Desert Research Institute
#   RVIB Nathaniel B. Palmer cruise NMP02-04, July-Sept 2002
#            * chla = chlorophyll-a, micrograms per liter (ug/l)
#            * lat = latitude reported in decimal degrees south
#            * lon = longitude reportred in decimal degrees west
#            * bot_depth  =  depth to bottom of ice core hole in meters

The fundamental objectives of United States Global Ocean Ecosystems Dynamics (U.S. GLOBEC) Program are dependent upon the cooperation of scientists from several disciplines. Physicists, biologists, and chemists must make use of data collected during U.S. GLOBEC field programs to further our understanding of the interplay of physics, biology, and chemistry. Our objectives require quantitative analysis of interdisciplinary data sets and, therefore, data must be exchanged between researchers. To extract the full scientific value, data must be made available to the scientific community on a timely basis.

The U.S. Global Ocean Ecosystems Dynamics (U.S. GLOBEC) program has the goal of understanding and ultimately predicting how populations of marine animal species respond to natural and anthropogenic changes in climate. Research in the Southern Ocean (SO) indicates strong coupling between climatic processes and ecosystem dynamics via the annual formation and destruction of sea ice. The Southern Ocean GLOBEC Program (SO GLOBEC) will investigate the dynamic relationship between physical processes and ecosystem responses through identification of critical parameters that affect the distribution, abundance and population dynamics of target species. The overall goals of the SO GLOBEC program are to elucidate shelf circulation processes and their effect on sea ice formation and krill distribution, and to examine the factors which govern krill survivorship and availability to higher trophic levels, including penguins, seals and whales. The focus of the U.S. contribution to the international SO GLOBEC program will be on winter processes. This component will focus on the distribution and activities of sea ice microbial communities. This will be accomplished using an integrated combination of sampling (vertical profiles, horizontal surveys, and under-ice surveys) and observational protocols. Experiments will be designed to estimate microbial activity within the sea ice and at the ice-seawater interface. The research will be coordinated with components studying the water column productivity and the sea ice habitat. The result of the integrated SO GLOBEC program will be to improve the predictability of living marine resources, especially with respect to local and global climatic shifts.

U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).

U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).