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Aradhna Tripati, Ph.D.

Assistant Professor, Atmospheric and Oceanic Studies
Member, California NanoSystems Institute, Institute of the Environment & Sustainability

Ph.D., University of California, Santa Cruz, 2000 - 2002
B.Sc., California State University, Los Angeles, 1992 - 1996

Contact Information:
Email Address:
Work Email Address:
Mailing Address: UCLA AOS/ESS/IGPP
BOX 951567, 4642 Geology
Los Angeles, CA 90095
Home Page:
Fax Number: 310-825-2779 Fax
Work Phone Number: 310-206-3531 Phone

Selected Publications:

Finnegan, S., Bergmann, K., Fischer, W., Jones, D., Fike, D., Tripati, A., Hughes, N., Eiler, J., , Carbonate "clumped" isotopic constraints on the duration and magnitude of Late Ordovician-Early Silurian glaciation, Science (331), 906-906.
Roberts, C., LeGrande, A., Tripati, A., Climate sensitivity to Arctic seaway restriction during the early Paleogene, Earth and Planetary Science Letters (286), 576-585.
Tripati, A., Sahany, S., Pittman, D., Eagle, R., Eiler, J., Neelin, D., Eiler, J., Mitchell, J., Beaufort, L, Enhanced tropical warming and entrainment explain Glacial to Recent changes in tropospheric structure over the West Pacific Warm Pool, Science.
Tripati, A., Backman, J., Elderfield, H., and Ferretti, P, Eocene bipolar glaciation associated with global carbon cycle changes, Nature (436), 341-346.
Blard, P.-H., Sylvestre, F., Tripati, A., Claude, C., Causse, C., Coudrain, A., Condom, T., Seidel, J.-L., Vimeux, F., Moreau, C., Dumoulin, J.-P., Lave, J, Estimates of Middle Eocene bottom water carbonate ion concentration from Oridorsalis umbonatus element ratios, Climate of the Past.
Spielhagen, R., Tripati, A, Evidence for near-freezing temperatures and climate oscillations in the Arctic during the early Cenozoic, Paleogeography, Palaeoecology, Palaeoclimatology (278), 48-56.
Blard, P.-H., Sylvestre, F., Tripati, A., Claude, C., Causse, C., Coudrain, A., Condom, T., Seidel, J.-L., Vimeux, F., Moreau, C., Dumoulin, J.-P., Lave, J., , Lake highstands on the Altiplano (Tropical Andes) contemporaneous with Heinrich 1 and the Younger Dryas: new insights from 14C, U-Th dating, and d18O of carbonates, Quaternary Science Reviews.
Dawber, C., Tripati, A., Relationship between bottom water carbonate saturation and X/Ca in core-top samples of the benthic foraminifera Oridorsalis umbonatus , Biogeosciences.
Tripati, A., Delaney, M.L., Zachos, J.C., Anderson, L.D., Kelly, D.C., and Elderfield, H., Tropical Sea-Surface Temperature Reconstruction for the Early Paleogene Using Mg/Ca Ratios of Planktonic Foraminifera, Paleoceanography, 18 (4), 1101.
Csank, A., Tripati, A., Patterson, W., Eagle, R., Rybczynski, N., Ballantyne, A., Eiler, J, , Estimates of Arctic land surface temperatures during the Early Pliocene from two novel proxies, Earth and Planetary Science Letters, 2011, 291-299.
Tripati, A., Eagle, R., Roberts, C., Li, G, A 20 million year long record of foraminiferal B/Ca ratios: Systematics and uncertainties in pCO2 reconstructions, Geochimica et Cosmochimica Acta, 2011, 75, 2582-2610.
Dawber, C., Tripati, A., Constraints on glaciation in the middle Eocene (46-37 Ma) from Ocean Drilling Program (ODP) Site 1209 in the tropical Pacific Ocean, Paleoceanography, 2011, 26.
Eagle, R., Tutken, T., Martin, T., Tripati, A., Fricke, H., Connely, M., Cifelli, R., Eiler, J., Dinosaur body temperatures determined from isotopic (¹³C-¹⁸O) ordering in fossil biominerals, Science, 2011, 443-445.
Dawber, C., Tripati, A., Gale, A., MacNiocaill, C., Hesselbo, S., Glacioeustasy during the middle Eocene? Insights from the stratigraphy of the Hampshire Basin, UK, Palaeogeography, Palaeoclimatology, Palaeoecology, 2011 (300), 84-100.
Roberts, C., LeGrande, A., Tripati, A., , Sensitivity of seawater oxygen isotopes to climatic and tectonic boundary conditions in an early Paleogene simulation with GISS ModelE-R, Paleoceanography, 2011.
Tripati, A., Thiagarajan, N., Eagle, R., Gagnon, A., Bauch, H., Eiler, J, Apparent equilibrium 13C-18O isotope signatures and ‘clumped isotope’ thermometry in foraminifera and coccoliths, Geochimica et Cosmochimica Acta, 2010 (74), 5697-5717.
Body temperature of modern and extinct vertebrates from 13C-18O bond abundances in bioapatite, Eagle, R., Schauble, E., Tripati, A., Tutken, T., Hulbert, R., Eiler, J, Proceedings of the National Academy of Sciences, 2010 (107), 10377-10382.
Torfstein, A., Winckler, G., Tripati, A., Productivity feedback did not terminate the Paleocene-Eocene Thermal Maximum, Climate of the Past, 2010 (6), 262-272.
Elderfield, H., Greaves, M., Barker, S., Hall, I., Tripati, A., Ferretti, P., Booth, L., Daunt, C., A record of bottom water temperature and seawater d18O for the Southern Ocean over the past 440 kyr based on Mg/Ca of benthic foraminiferal Uvigerina spp, Quaternary Science Reviews, 2009.
Tripati, A., Roberts, C., Eagle, R., Coupling of CO2 and ice sheet stability over major climate transitions of the last 20 million years, Science, 2009 (326), 1394-1397.
Huntington, K., Eiler, J., Affek, H., Guo, W., Bonifacie, M., Yeung, L., Thiagarajan, N., Passey, B., Tripati, A., Daeron, M., Came, R., , Methods and limitations of 'clumped' CO2 isotope (⊗47) analysis by gas-source isotope-ratio mass spectrometry, Journal of Mass Spectometry, 2009.
Roberts, C., Tripati, A., Modelled reconstructions of the oceanic carbonate system for different histories of atmospheric carbon dioxide during the last 20 Ma, Global Biogeochemical Cycles, 2009, 23.
Tripati, A., Sampson, D., Allmon, W., 2009, Possible evidence for a large decrease in seawater Sr/Ca ratios and strontium concentrations during the Cenozoic, Earth and Planetary Science Letters, 2009 (282).
Tripati, A., Eagle, R., Morton, A., Dowdeswell, J., Atkinson, K., Bahe, Y., Dawber, F., Khadun, E., Shaw, R., Shorttle, O., Thanabalasundaram, L., Evidence for Northern Hemisphere glaciation back to 44 Ma from ice-rafted debris in the Greenland Sea, Earth and Planetary Science Letters, 2008.
Sime, N., De La Rocha, C., Tipper, E., Tripati, A., Galy, A., Elderfield, H. and Bickle, M., Interpreting the calcium isotopic composition of seawater through the Neogene and Quaternary, Geochimica et Cosmochimica Acta, 2007 (71), 3979-3989.
Tripati, A., Elderfield, H., Booth, L., Zachos, J., and Ferretti, P, High-resolution benthic foraminiferal stable isotope stratigraphy across the Oligocene-Miocene boundary at Site 1218, ODP Leg 199 Scientific Reasons, 2006.
Paelike, H., Norris, R., Herrle, J., Wilson, P., Coxall, H., Lear, C., Shackleton, N., Tripati A., and Wade, B, The heartbeat of the Oligocene climate system, Science, 2006 (314), 1894-1898.
Lyle, M., Olivarez Lyle, A., Backman, J. and Tripati, A., Biogenic sedimentation in the Eocene equatorial Pacific: The stuttering greenhouse and Eocene carbonate compensation depth, ODP Leg 199 Scientific Results, 2005.
Tripati, A. and Elderfield, H., Deep-Sea Temperature and Circulation CHanges at the Paleocene-Eocene Thrmal Maximum, Science, 2005 (308), 1894-1898.
Tripati, A. and Elderfield, H., Abrupt hydrographic changes in the equatorial Pacific and subtropical Atlantic from foraminiferal Mg/Ca indicate greenhouse origins for the thermal maximum at the Paleocene-Eocene Boundary, Geochem., Geophys., Geosyst.,, 2004.
Shipboard Science Party, Leg 199 investigates the "Greenhouse" Eoscene in the tropical Pacific Ocean, JODIES Journal, 2003, 29 (1), 6-10.
Nomura, R., Nishi, H. and Shipboard Science Party, Lithological changes across the Paleocene/Eocene boundary, J. Geol. Soc. Japan, 2003, 17-18.
Tripati, A., Delaney, M.L., Zachos, J.C., Anderson, L.D., Kelly, D.C., and Elderfield, H, Tropical Sea-Surface Temperature Reconstruction for the Early Paleogene Using Mg/Ca Ratios of Planktonic Foraminifera, Paleoceanography, 2003, 18 (4), 1101.
Quintin, L.L., Faul, K.L., Lear, C., Graham, D., Peng, C., Murray, R. and Shipboard Science Party, Geochemical analysis of bulk marine sediment by inductively-coupled plasma-atomic emission spectroscopy onboard the JOIDES Resolution, ODP Leg 199 Initial Reports, 2002.
Tripati, A. and Zachos, J.C., Late Eocene Tropical Sea Surface Temperatures. A perspective from Panama, Paleoceanography, 2002, 17 (3), 1032.
Shipboard Science Party, Leg 199 Initial Reports: Paleogene equatorial transect, ODP Leg 199 Initial Reports, 2002.
Tripati, A., Zachos, J.C., Marincovich Jr., L., and Bice, K., Late Paleocene Arctic Coastal Climate as Inferred from Molluscan Stable and Radiogenic Isotope Ratios, Palaeogeog., Palaeoclimatol., Palaeoecol, 2001, 101-133.
Paul, H., Zachos, J.C., Flower, B.P., and Tripati, A., Orbital Forcing of Climate Across the Oligocene-Miocene Boundary, Paleoceanography, 2000 (5), 471-485.
Tripati, A. and Zachos, J.C, Paleocene and Eocene Coastal Temperatures, GFF, 2000 (122), 171-172.