Margaret Delaney

Margaret (Peggy) Delaney is marine geochemist known for her research on trace elements to examine changes in ocean chemistry over time.

Margaret Lois Delaney
Scientific career
InstitutionsUniversity of California, Santa Cruz
ThesisForaminiferal trace elements : uptake, diagenesis, and 100 m.y. paleochemical history (1983)
Doctoral advisorEdward A. Boyle

Education and career

Delaney earned her B.S. in chemistry from Yale University in 1973 and a Ph.D. from the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program (1983).[1] Following her Ph.D., Delaney joined the University of California Santa Cruz in 1983, and later became chair of the Ocean Sciences Department.[2] At the time of her retirement in 2020, Delaney was Vice Chancellor for Planning and Budget at the University of California Santa Cruz.[3]

In her service to the community, Delaney was the editor of the journal Paleoceanography and Paleoclimatology from 1996 to 1999.[4] In 2005, Delaney started a three-year term as editor of the journal Earth and Planetary Sciences.[5] She was also involved in the leadership and management of the Ocean Drilling Program (ODP) and the Integrated Ocean Drilling Program (IODP).[6]

In 2004, Delaney was elected a fellow of the American Geophysical Union and the citation noted her:[6]

innovative work defining links between biogeochemically important elements and past changes in climate; and her altruistic and exemplary service to the oceanographic community

Research

Delaney's research used geochemical measurements to examine changes in ocean chemistry. She looked at concentration of trace elements in shells of foraminifera and was the first to show that changes in the ratios of elements such as lithium, strontium, and calcium were linked to environmental conditions experienced by the foraminifera.[7] These elemental ratios in corals can be used to reconstruct ocean chemistry and Delaney examined trace element levels in corals found at the Galapagos Islands.[8][9] In marine sediments, Delaney examined the accumulation of phosphorus in the equatorial Pacific,[10] tracked phosphorus from riverine sources[11] and particles[12] to the seafloor. Delaney applied these geochemical tools to studies of the Pliocene,[13] the Paleocene-Eocene Thermal Maximum,[14] and changes in the ocean currents around Antarctica.[15]

Selected publications

Awards and honors

References
  1. "UC Santa Cruz - Peggy (Margaret) Delaney". people.ucsc.edu.
  2. Irwin, Elizabeth; Writer 459-2495, Guest. "Margaret L. Delaney appointed interim campus provost and executive vice chancellor at UC Santa Cruz". UC Santa Cruz News. Retrieved 2021-07-06.
  3. "Vice Chancellor Peggy Delaney retiring". UC Santa Cruz News. Retrieved 2021-07-02.
  4. "Paleoceanography and Paleoclimatology". AGU Journals. doi:10.1002/(ISSN)2572-4525. Retrieved 2021-07-02.
  5. "Awards-Margaret Delaney named editor of Earth science journal". currents.ucsc.edu. October 31, 2005. Retrieved 2021-07-02.
  6. Stephens, Tim (February 23, 2004). "UCSC ocean scientist Margaret Delaney elected fellow of the American Geophysical Union". UC Santa Cruz News. Retrieved 2021-07-02.
  7. Delaney, Margaret Lois; Bé, Allan W.H.; Boyle, Edward A. (1985-06-01). "Li, Sr, Mg, and Na in foraminiferal calcite shells from laboratory culture, sediment traps, and sediment cores". Geochimica et Cosmochimica Acta. 49 (6): 1327–1341. Bibcode:1985GeCoA..49.1327D. doi:10.1016/0016-7037(85)90284-4. ISSN 0016-7037.
  8. Linn, L.J; Delaney, M.L; Druffel, E.R.M (1990). "Trace metals in contemporary and seventeenth-century Galapagos coral: Records of seasonal and annual variations". Geochimica et Cosmochimica Acta. 54 (2): 387–394. Bibcode:1990GeCoA..54..387L. doi:10.1016/0016-7037(90)90327-H.
  9. Delaney, M.L; Linn, L.J; Druffel, E.R.M (1993). "Seasonal cycles of manganese and cadmium in coral from the Galapagos Islands". Geochimica et Cosmochimica Acta. 57 (2): 347–354. Bibcode:1993GeCoA..57..347D. doi:10.1016/0016-7037(93)90436-Z. S2CID 55665392.
  10. Filippelli, Gabriel M.; Delaney, Margaret Lois (1996-05-01). "Phosphorus geochemistry of equatorial Pacific sediments". Geochimica et Cosmochimica Acta. 60 (9): 1479–1495. Bibcode:1996GeCoA..60.1479F. doi:10.1016/0016-7037(96)00042-7. ISSN 0016-7037.
  11. Delaney, M. L. (1998). "Phosphorus accumulation in marine sediments and the oceanic phosphorus cycle". Global Biogeochemical Cycles. 12 (4): 563–572. Bibcode:1998GBioC..12..563D. doi:10.1029/98GB02263.
  12. Faul, Kristina L.; Paytan, Adina; Delaney, Margaret L. (2005). "Phosphorus distribution in sinking oceanic particulate matter". Marine Chemistry. 97 (3–4): 307–333. doi:10.1016/j.marchem.2005.04.002.
  13. Wara, M. W. (2005-07-29). "Permanent El Nino-Like Conditions During the Pliocene Warm Period". Science. 309 (5735): 758–761. Bibcode:2005Sci...309..758W. doi:10.1126/science.1112596. ISSN 0036-8075. PMID 15976271. S2CID 37042990.
  14. Zachos, J. C. (2003-11-28). "A Transient Rise in Tropical Sea Surface Temperature During the Paleocene-Eocene Thermal Maximum". Science. 302 (5650): 1551–1554. Bibcode:2003Sci...302.1551Z. doi:10.1126/science.1090110. ISSN 0036-8075. PMID 14576441. S2CID 6582869.
  15. Scher, Howie D.; Whittaker, Joanne M.; Williams, Simon E.; Latimer, Jennifer C.; Kordesch, Wendy E. C.; Delaney, Margaret L. (2015). "Onset of Antarctic Circumpolar Current 30 million years ago as Tasmanian Gateway aligned with westerlies". Nature. 523 (7562): 580–583. Bibcode:2015Natur.523..580S. doi:10.1038/nature14598. ISSN 1476-4687. PMID 26223626. S2CID 205244510.
  16. "Union Fellows | AGU". www.agu.org. Retrieved 2021-07-02.
  17. "tos-fellows-meet | The Oceanography Society". tos.org. Retrieved 2021-07-02.
  18. "Outstanding Educator Award" (PDF). 2020.


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