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FIELDWORK: MIT Chemical Oceanography, Trace Metal Group

We engage in oceanographic field work on a regular basis, and sometimes branch out into other areas (ice cores, rivers, and estuaries).

Recent cruise work:

R/V Kilo Moana, May, June, July, August 2012: C-MORE HOE-Dylan

Gonzalo Carrasco, Abigail Noble, Jessica Fitzsimmons, Simone Moos, and Rick Kayser “Occupy HOT” for four months, almost continuously. Daily surface sampling and monthly profiles for Fe and Pb.

R/V Knorr, November/December 2011 Woods Hole-Bermuda-Cape Verde Islands: US GEOTRACES North Atlantic Transect (pt. 2)

Ed Boyle, Jessica Fitzsimmons, Gonzalo Carrasco and 29 other scientists complete the NAT. They collected samples for Fe, Fe colloid, Fe speciation, and Pb and Pb isotope analysis. Abigail Noble is doing the Pb and Pb isotope analyses.

R/V Kilo Moana, April 2011

Jessica Fitzsimmons participated in this Hawaii Ocean Timeseries cruise (Matt Church, Chief Scientist) to test and refine methods for the sampling and treatment of samples for iron and iron colloids.

R/V Melville, Chile-Easter Island, November 2010: C-MORE BigRAPA cruise:

Jong-Mi Lee and Rick Kayser participated in this cruise in the southeast Pacific from Chile to Easter Island (Dan Repeta, Chief Scientist). They collected samples for Fe, Fe colloid, Fe speciation, and Pb and Pb isotope analysis.

R/V Knorr, Lisbon-Cape Verde Islands, Oct. 2010: US GEOTRACES North Atlantic Transect (pt. 1)

This was the first US GEOTRACES cruise, beginning the North Atlantic Transect effort until propulsion problems forced us to go into the Cape Verde Islands after 3 weeks. Bill Jenkins and Ed Boyle (co-chief scientists) teamed up with one Mauritanean observer and 29 scientists (including Jessica Fitzsimmons and Gonzalo Carrasco from the MIT group) to get the US GT program off the ground. Presentations at the US GT NAT workshop in March 2011 indicated that things were going very well with clean samples for contamination-prone trace elements such as Zn, Fe, and Pb.

R/V Knorr, Hawaii-San Diego May 2009: GEOTRACES IC2

Jessica Fitzsimmons participated in this second US GT InterCalibration cruise (Greg Cutter, Chief Scientist) to test and refine sampling and handling for trace metals such as Pb and Fe.

R/V Oceanus, Barbados-Cape Verde Islands, Aug. 2008

Ed Boyle (Chief Scientist, Rick Kayser, Jong-Mi Lee, Jessica Fitzsimmons, and Ruifeng Zhang from MIT joined with Taka Ito (U. Colorado), Max Gorbunov and Chengyi Yan (Rutgers) and Phoebe Lam and Stephanie Owens (WHOI) to map out dissolved and particulate Fe in the tropical North Atlantic oxygen minimum zone.

R/V Knorr, Norfolk-Bermuda June 2007: GEOTRACES IC1

Ed Boyle and Seth John joined with a host of trace element oceanographers (Greg Cutter, Chief Scientist) in this first leg of the first GEOTRACES test cruise. We sat for 3 weeks near Bermuda (BATS) testing trace element sampling gear and collecting large-volume tank samples for trace radioisotope, trace element and trace element isotope analyses.

R/V Kilo Moana, Australia -> Fiji, Mar.-Apr. 2007

CMORE: Ed Boyle sailed with Nitrogen Fixation marine biologists (e.g. Jon Zehr, Joe Montoya, John Waterbury) to see if iron influences the nitrogen cycle in the southwest Pacific. We obtained the first full water column profile for Fe in the southwest Pacific and found that Trichodesmium blooms were coincident with high-Fe waters originating from shallow coastal waters.

R/V Knorr, Peru -> Mexico, Oct. 2005

Seth John collected samples for Zn stable isotopes ratios in the Peruvian upwelling region in a cruise led by Jim Moffett at WHOI.

R/V Endeavor, Narragansett RI -> Barbados, Jul. 8 - July 27, 2005

"Lead and Iron Variability in the Ocean", an NSF-sponsored project to determine the penetration of anthropogenic lead into the ocean, and to improve our understanding of the iron distribution in the ocean. In this cruise we focused on the western boundary southward penetration of upper North Atlantic Deep Water from the Labrador Sea in three zonal sections at 33°N, 24°N, and 16°N. Ed Boyle (Chief Scientist), Seth John, Alison Engwall and Josh Feldman from MIT and Matthew Horn from URI.

R/V Melville, Honolulu -> San Diego, Oct. 15-Nov. 8, 2004

"SAFe": Sampling and Analysis of Iron in Seawater, a national (NSF) and international effort to determine how to reliably sample and measure iron in seawater by a variety of field and laboratory techniques. Ed Boyle and Bridget Bergquist

R/V Kilo Moana, Seattle -> Dutch Harbor, Alaska, June 18-Aug. 5, 2003

In collaboration with Jim Moffett (Chief Scientist) and Mak Saito (WHOI), graduate student Seth John collected plankton and water samples for the analysis of stable zinc isotope ratios. He also investigated the availability of colloidal Fe for marine phytoplankton.

R/V Kilo Moana, Honolulu -> Honolulu, Sept. - Oct. 2002

"MANTRA": Marine Nitrogen Transformation, an NSF-funded "Biocomplexity" program that seeks to elucidate the role of iron in limiting nitrogen fixation in the ocean. Ed Boyle and Seth John, and a large cast of biological oceanographers (Doug Capone, Chief Scientist).

R/V Kaimikai-O-Kanaloa, Honolulu -> Honolulu, Sept. - Oct. 2002

"MANTRA": Marine Nitrogen Transformation, an NSF-funded "Biocomplexity" program that seeks to elucidate the role of iron in limiting nitrogen fixation in the ocean. Bridget Bergquist, and a large cast of biological oceanographers.

R/V Endeavor, Barbados -> Rio de Janeiro, Feb.-Mar. 2002

"Lead and Iron Variability in the Ocean", an NSF-sponsored project to determine the penetration of anthropogenic lead into the ocean, and to improve our understanding of the iron distribution in the ocean. Ed Boyle (Chief Scientist), Bridget Bergquist, Matt Reuer and Rick Kayser from MIT, and Ana Lima, Jim Moffett, Sonja Dhyrman, and Eric Webb from WHOI.

Other Recent Field Work:

Amazon River Iron Isotope Sampling, Brazil, Mar. 2002

Bridget Bergquist and Ana Lima flew to various locations on the Amazon (Manaus and Macapa) to sample the main river and its large tributary, the Rio Negro, to determine the stable isotope composition of colloidal iron in the river and estuary.

MITESS: Moored Trace Metal Sampler Deployments

We deployws an automated trace element sampling device on moorings near Bermuda (BTM) and Hawaii (HALE-Aloha MOSEAN) from 1997-2005. These moorings were serviced 2-3 times a year. Three days of scrubbing scuzz, replacing batteries and other fun stuff. And people don't believe us when we complain about having to go to Bermuda or Hawaii again...

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This web page was last revised on Sept. 28, 2012