Daniel P. Schrag

Daniel Paul Schrag (born January 25, 1966) is the Sturgis Hooper Professor of Geology, Professor of Environmental Science and Engineering at Harvard University and Director of the Harvard University Center for the Environment.  He also co-directs the Science, Technology and Public Policy Program at the Belfer Center for Science and International Affairs at the Harvard University Harvard Kennedy School. He is also an external professor at the Santa Fe Institute.[1]

Daniel P. Schrag
Born (1966-01-25) January 25, 1966
NationalityAmerican
Alma mater
AwardsMacArthur Fellowship (2000)
Scientific career
FieldsGeology
Institutions
ThesisOxygen Isotope Exchange and Transport in Deep Sea Sediments and Pore Fluids : Deciphering the History of Earth's Climate (1993)
Doctoral advisorDonald J. DePaolo

Early life and Education

Schrag received his B.S. in geology & geophysics and political science from Yale University in 1988. He received his Ph.D. in geology from University of California, Berkeley in 1993 under the supervision of Donald J. DePaolo.[2]

Career

Much of his research focuses on past climate change, including work on a variety of issues ranging from temperature reconstructions from deep marine sediments and corals, to theories for Pleistocene ice-age cycles, to further developing the preexisting Snowball Earth hypothesis with his colleague Paul F. Hoffman. Currently he is working with economists and engineers on technological approaches to mitigating future climate change.

Current
  • Sturgis Hooper Professor of Geology, Professor of Environmental Science and Engineering, Harvard University
  • Area Dean for Environmental Science and Engineering, Harvard University
  • Co-Director, Science, Technology, and Public Policy Program, Harvard Kennedy School
  • Director, Harvard University Center for the Environment
  • External Faculty, Santa Fe Institute
  • Steering Committee Member, Harvard Project on Climate Agreements
  • Chair, Environmental Advisory Board, JPB Foundation

Past

Memberships

Awards and Honors

Publications

Authored:[3]

174. Laakso, TA and Schrag, DP. The role of authigenic carbonate in Neoproterozoic carbon isotope excursions. Earth Planet. Sci. Lett. 549, 1-10, 2020.

173. Kuntz, LB and Schrag, DP. Representation of the Equatorial Undercurrent in CMIP5 models. Journal of Physical Oceanography, 50(10), 2020.

172.  Erhardt, AM, Turchyn, AV, Dickson, JAD, Sadekov, AY, Taylor, PD, Wilson, MA, and Schrag, DP. Chemical composition of carbonate hardground cements as reconstructive tools for phanerozoic pore fluids. Geochem. Geophys. Geosyst., 21, 2020.

171.  Ford MJ and Schrag, DP. The case for a tortoise approach to U.S. nuclear research and development. Energy Policy, 135, 1-11, 2019.

170.  Laakso, TA and Schrag, DP. Methane in the Precambrian atmosphere. Earth Planet. Sci. Lett. 522, 48-54, 2019.

169.  Dagon, K and Schrag, DP. Quantifying the effects of solar geoengineering on vegetation. Climatic Change, 153(1-2), 235-251, 2019.

168. Laakso, TA and Schrag, DP. A small marine biosphere in the Proterozoic. Geobiology, (17)2, 161-171, 2019.

167. Ford, MJ and Schrag, DP. A tortoise approach for U.S. nuclear research and development. Nature Energy, (3)10, 810-812, 2018.

166. Laakso, TA and Schrag, DP. Limitations on limitation. Global Biogeochemical Cycles, (32)3, 486-496, 2018.

165. Kuntz, LB and Schrag, DP. Hemispheric asymmetry in the ventilated thermocline of the tropical Pacific. Journal of Climate, 31(3), 1281-1288, 2018.

164. Cumming, L, Gupta, N, Miller, K, Lombardi, C, Goldberg, D, ten Brink, U, Schrag, D, Andreasen, D, and Carter, K. Mid-Atlantic U.S. Offshore Carbon Storage Resource Assessment. Energy Procedia, 114, 4629-4636, 2017.

163. Dagon, K and Schrag, DP. Regional climate variability under model simulations of solar geoengineering. J. Geophys. Res.–Atmospheres, 122 (22), 12106-12121, 2017.

162.  Ocko, IB, Hamburg, SP, Jacob, DJ, Keith, DW, Keohane, NO, Oppenheimer, M, Roy-Mayhew, JD, Schrag, DP, and Pacala, SW. Unmask temporal trade-offs in climate policy debates. Science, 356 (6337), 492-493, 2017.

161.  Laakso, TA and Schrag, DP. A theory of atmospheric oxygen. Geobiology, 15 (3), 366-384, 2017.

160. Kuntz, LB and Schrag, DP. Impact of Asian aerosol forcing on tropical Pacific circulation and the relationship to global temperature trends. J. Geophys. Res.–Atmospheres, 121 (24), 14403-14413, 2016.

159.  Hoffman, P, Bellefroid, EJ, Johnson, BW, Hodgskiss, MSW, Schrag, DP, and Halverson, GP. Early extensional detachments in a contractional orogen: coherent, map-scale, submarine slides (mass transport complexes) on the outer slope of an Ediacaran collisional foredeep, eastern Kaoko belt, Namibia. Canadian Journal of Earth Sciences, 53 (11), 1177-1189, 2016.

158.  Smith, EF, Nelson, LL, Strange, MA, Eyster, AE, Rowland, SM, Schrag, DP, and Macdonald, FA. The end of the Ediacaran: Two new exceptionally preserved body fossil assemblages from Mount Dunfee, Nevada, USA. Geology, 44 (11), 911-914, 2016.

157.  Lorrey, AM, Brookman, TH, Evans, MN, Fauchereau, NC, Macinnis-Ng, C, Barbour, MM, Criscitiello, A, Eischeid, G, Fowler, A, Horton, TW, and Schrag, DP. Stable oxygen isotope signatures of early season wood in New Zealand kauri (Agathis australis) tree rings: Prospects for palaeoclimate reconstruction. Dendrochronologia, 40, 1-14, 2016.

156.  Clark, PU, Shakun, JD, Marcott, SA, Mix, AC, Eby, M, Kulp, S, Levermann, A, Milne, GA, Pfister, PL, Santer, BD, Schrag, DP, Solomon, S, Stocker, TF, Strauss, BH, Weaver, AJ, Winkelmann, R, Archer, D, Bard, E, Goldner, A, Lambeck, K, Pierrehumbert, RT, and Plattner, G. Consequences of twenty-first-century policy for multi-millennial climate and sea-level change. Nature Climate Change, 6(4), 360-369, 2016.

155.  Dagon, K and Schrag, DP. Exploring the Effects of Solar Radiation Management on Water Cycling in a Coupled Land-Atmosphere Model. Journal of Climate, 29(7), 2635-2650, 2016.

154.  Smith, EF, Macdonald, FA, Petach, TA, Bold, U, and Schrag, DP. Integrated stratigraphic, geochemical, and paleontological late Ediacaran to early Cambrian records from southwestern Mongolia. GSA Bulletin, 128(3-4), 442-468, 2016.

153.  Bold, U, Smith, EF, Rooney, AD, Bowring, SA, Buchwaldt, R, Dudas, FO, Ramezani, J, Crowley, JL, Schrag, DP, and Macdonald, FA. Neoproterozoic stratigraphy of the Zavkhan Terrane of Mongolia: The backbone for Cryogenian and early Ediacaran chemostratigraphic records. Amer. Journal of Sci., 316(1), 1-63, 2016.

152.  Petersen, SV and Schrag, DP. Antarctic ice growth before and after the Eocene-Oligocene transition: New estimates from clumped isotope paleothermometry. Paleoceanography, 30(10), 1305-1317, 2015.

151.  Martindale, RC, Strauss, JV, Sperling, EA, Johnson, JE, Van Kranendonk, MJ, Flannery, D, French, K, Lepot, K, Mazumder, R, Rice, MS, Schrag, DP, Summons, R, Walter, M, Abelson, J, and Knoll, AH. Sedimentology, chemostratigraphy, and stromatolites of lower Paleoproterozoic carbonates, Turee Creek Group, Western Australia. Precambrian Research, 266, 194-211, 2015.

150.  Kuntz, LB, Laakso, TA, Schrag, DP, and Crowe, SA. Modeling the carbon cycle in Lake Matano. Geobiology, 2015.

149.  Smith, EF, Macdonald, FA, Crowley, JL, Hodgin, EB, and Schrag, DP. Tectonostratigraphic evolution of the c. 780–730 Ma Beck Spring Dolomite: Basin Formation in the core of Rodinia, in Supercontinent Cycles Through Earth History, edited by ZX Li, DAD Evans, Li, Z. X., Evans, and JB Murphy. Geological Society, London, Special Publications, UK, 424, 2015.

148.  Gothmann, AM, Stolarski, J, Adkins, JF, Schoene, B, Dennis, KJ, Schrag, DP, Mazur, M, and Bender, ML. Fossil corals as an archive of secular variations in seawater chemistry since the Mesozoic. Geochim. Cosmochim. Acta, 160, 188-208, 2015.

147.  Linsley, BK, Wu, HC, Dassié, EP, and Schrag, DP. Decadal changes in South Pacific sea surface temperatures and the relationship to the Pacific decadal oscillation and upper ocean heat content. Geophys. Res. Lett., 42, 2015.

146.  Higgins, JA and Schrag, DP. The Mg isotopic composition of Cenozoic seawater—evidence for a link between Mg-clays, seawater Mg/Ca, and climate. Earth Planet. Sci. Lett., 416, 73-81, 2015.

145.  Petersen, SV and Schrag, DP. Clumped isotope measurements of small carbonate samples using a high-efficiency dual-reservoir technique. Rapid Commun. Mass Spectrom., 28, 2371–2381, 2014.

144.  Wu, HC, Moreau, M, Linsley, BK, Schrag, DP, Correge, T. Investigation of sea surface temperature changes from replicated coral Sr/Ca variations in the eastern equatorial Pacific (Clipperton Atoll) since 1874. Palaeogeography, Palaeoclimatology, Palaeoecology, 412, 208-222, 2014.

143.  Creveling, JR, Johnston, DT, Poulton, SW, Kotrc, B, Maerz, C, Schrag, DP, and Knoll, AH. Phosphorus sources for phosphatic Cambrian carbonates. GSA Bulletin, 126(1-2), 145-163, 2014.

142.  Laakso, TA and Schrag, DP. Regulation of atmospheric oxygen during the Proterozoic. Earth Planet. Sci. Lett., 388, 81-91, 2014.

141.  Johnston, DT, Poulton, SW, Tosca, NJ, O’Brien, T, Halverson, GP, Schrag, DP, and Macdonald, FA. Searching for an oxygenation event in the fossiliferous Ediacaran of northwestern Canada. Chemical Geology, 362, 273-286, 2013.

140.  Shoemaker, JK, Schrag, DP, Molina, MJ, and Ramanathan, V. What role for short-lived climate pollutants in mitigation policy? Science, 342, 1323-1324, 2013.

139.  Jordaan, SM, Anadon, LD, Mielke, E, and Schrag, DP. Regional water implications of reducing oil imports with liquid transportation fuel alternatives in the United States. Environ. Sci. Technol., 47, 11976-11984, 2013.

138.  Shoemaker, JK and Schrag, DP. The danger of overvaluing methane’s influence on future climate change. Clim. Change, 120, 903-914, 2013.

137.  Macdonald, FA, Strauss, JV, Sperling, EA, Halverson, GP, Narbonne, GM, Johnston, DT, Kunzmann, M, Schrag, DP, and Higgins, JA. The stratigraphic relationship between the Shuram carbon isotope excursion, the oxygenation of Neoproterozoic oceans, and the first appearance of the Ediacara biota and bilaterian trace fossils in northwestern Canada. Chem. Geol., 2013.

136.  Petersen, SV, Schrag, DP, and Clark, PU. A new mechanism for Dansgaard-Oeschger cycles. Paleoceanography, 28, 24-30, 2013.

135.  Ashkenazy, Y, Gildor, H, Losch, M, Macdonald, FA, Schrag, DP, and Tziperman, E. Dynamics of a Snowball Earth ocean. Nature, 495, 90-93, 2013.

134.  Schrag, DP, Higgins, JA, Macdonald, FA, and Johnston, DT. Authigenic carbonate and the history of the global carbon cycle. Science, 339, 540-543, 2013.

133.  Dennis, KJ, Cochran, JK, Landman, NH, and Schrag, DP. The climate of the Late Cretaceous: New insights from the application of the carbonate clumped isotope thermometer to Western Interior Seaway macrofossil. Earth Planet. Sci. Lett., 362, 51-65, 2013.

132.  Higgins, JA and Schrag, DP. Records of Neogene seawater chemistry and diagenesis in deep-sea carbonate sediments and pore fluids. Earth Planet. Sci. Lett., 357, 386-396, 2012.

131.  Schrag, DP. Geobiology of the Anthropocene, in Fundamentals of Geobiology, edited by A Knoll, D Canfield, and K Konhauser. John Wiley & Sons, Ltd., Chichester, UK, 425-436, 2012.

130.  Shoemaker, JK, Varner, RK, and Schrag, DP. Characterization of subsurface methane production and release over 3 years at a New Hampshire wetland. Geochim. Cosmochim. Acta, 91, 120-139, 2012.

129.  Tziperman, E, Abbot, DS, Ashkenazy, Y, Gildor, H, Pollard, D, Schoof, CG, and Schrag, DP. Continental constriction and oceanic ice-cover thickness in a Snowball-Earth scenario. JGR-Oceans, 117, C05016, 2012.

128.  Schrag, DP. Is shale gas good for climate change? Dӕdalus, 141(2), 72-80, 2012.

127.  Johnston, DT, Macdonald, FA, Gill, BC, Hoffman, PF, and Schrag, DP. Uncovering the Neoproterozoic carbon cycle. Nature, 483, 320-U110, 2012.

126.  Schrag, DP. Hope and the Climate Scientist: Response to McKibben’s Human Flourishing Depends on What We Do Now, in Ecologies of Human Flourishing, edited by D Swearer and S McGarry. Harvard University Press, Cambridge, MA, 169-174, 2011.

125.  Anderson, J, Archer, D, Battisti, D, Bender, M, Cane, M, deMenocal, P, Emanuel, K, Fung, I, Huybers, P, Keeling, R, Molina, M, Pierrehumbert, R, Schrag, D, and Wofsy, S. On writ of certiorari to the United States Court of Appeals for the Second Circuit: Brief of amicus curiae in support of the respondents. American Electric Power Company, Inc., et al., v. State of Connecticut, et al. Supreme Court of the United States, No. 10-174, 2011.

124.  Dennis, KJ, Affek, HP, Passey, BH, Schrag, DP, and Eiler, JM. Defining an absolute reference frame for ‘clumped’ isotope studies of CO2. Geochim. Cosmochim. Acta, 75(22), 7117-7131, 2011.

123.  Tziperman, E, Halevy, I, Johnston, DT, Knoll, AH, and Schrag, DP. Biologically induced initiation of Neoproterozoic snowball-Earth events. Proc. Natl. Acad. Sci. U.S.A., 108, 15091-15096, 2011.

122.  Jones, DS, Fike, DA, Finnegan, S, Fischer, WW, Schrag, DP, and McCay, D. Terminal Ordovician carbon isotope stratigraphy and glacioeustatic sea-level change across Anticosti Island (Quebec, Canada). GSA Bulletin, 123(7-8), 1645-1664, 2011.

121.  Macdonald, FA, Strauss, JV, Rose, CV, Dudas, FO, and Schrag, DP. Stratigraphy of the Port Nolloth Group of Namibia and South Africa and implications for the age of Neoproterozoic iron formations. Amer. Journal of Sci., 310(9), 862-888, 2010.

120.  House, KZ, Altundas, B, Harvey, CF, and Schrag, DP. The immobility of CO2 in marine sediments beneath 1500 meters of water. ChemSusChem, 3, 905-912, 2010.

119.  Higgins, JA and Schrag, DP. Constraining magnesium cycling in marine sediments using magnesium isotopes. Geochim. Cosmochim. Acta, 74, 5039-5053, 2010.

118.  Jones, DS, Maloof, AC, Hurtgen, MT, Rainbird, RH, and Schrag, DP. Regional and global chemostratigraphic correlation of the early Neoproterozoic Shaler Supergroup, Victoria Island, Northwestern Canada. Precambrian Research, 181, 43-63, 2010.

117.  Dennis, KJ and Schrag, DP. Clumped isotope thermometry of carbonatites as an indicator of diagenetic alteration. Geochim. Cosmochim. Acta, 74, 4110-4122, 2010.

116.  Halevy, I, Johnston, DT, and Schrag, DP. Explaining the structure of the Archean mass-independent sulfur isotope record. Science, 329, 204-207, 2010.

115.  Schneps, MH, Griswold, A, Finkelstein, N, McLeod, M, and Schrag, DP. Using video to build learning contexts online. Science, 328, 1119-1120, 2010.

114.  Wilson, JP, Fischer, WW, Johnston, DT, Knoll, AH, Grotzinger, JP, Walter, MR, McNaughton, NJ, Simon, M, Abelson, J, Schrag, DP, Summons, R, Allwood, A, Andres, M, Gammon, C, Garvin, J, Rashby, S, Schweizer, M, and Watters, W. Geobiology of the late Paleoproterozoic Duck Creek Formation, Western Australia. Precambrian Research, 179, 135-149, 2010.

113.  Shoemaker, JK and Schrag, DP. Subsurface characterization of methane production and oxidation from a New Hampshire wetland. Geobiology, 8, 234-243, 2010.

112.  Turchyn, AV, Bruchert, V, Lyons, TW, Engel, GS, Balci, N, Schrag, DP, and Brunner, B. Kinetic oxygen isotope effects during dissimilatory sulfate reduction: A combined theoretical and experimental approach. Geochim. Cosmochim. Acta, 74, 2011-2024, 2010.

111.  Macdonald, FA, Schmitz, MD, Crowley, JL, Roots, CF, Jones, DS, Maloof, AC, Strauss, JV, Cohen, PA, Johnston, DT, and Schrag, DP. Calibrating the Cryogenian. Science, 327, 1241-1243, 2010.

110.  Macdonald, F, Cohen, P, Dudas, F, and Schrag, DP. Early Neoproterozoic scale microfossils in the Lower Tindir Group of Alaska and the Yukon Territory. Geology, 38, 143-146, 2010.

109.  Schrag, DP. Storage of carbon dioxide in offshore sediments. Science, 325, 1658-1659, 2009.

108.  Schrag, DP. Coal as a low-carbon fuel? Nature Geoscience, 2, 818-820, 2009.

107.  Halevy, I and Schrag, DP. Sulfur dioxide inhibits calcium carbonate precipitation: Implications for early Mars and Earth. Geophys. Res. Lett., 36, 2009.

106.  Halevy, I, Pierrehumbert, RT, and Schrag, DP. Radiative transfer in CO2-rich paleoatmospheres. J. Geophys. Res.–Atmospheres, 114, 2009.

105.  Guilderson, TP, Fallon, S, Moore, MD, Schrag, DP, and Charles, CD. Seasonally resolved surface water Δ14C variability in the Lombok Strait: A coralline perspective. J. Geophys. Res., 114, 2009.

104.  Higgins, JA, Fischer, WW, and Schrag, DP. Oxygenation of the ocean and sediments: Consequences for the seafloor carbonate factory. Earth Planet. Sci. Lett., 284, 25-33, 2009.

103.  Turchyn, AV, Schrag, DP, Coccioni, R, and Montanari, A. Stable isotope analysis of the Cretaceous sulfur cycle. Earth Planet. Sci. Lett., 285, 115-123, 2009.

102.  Schrag, DP. Making Carbon Capture and Storage Work, in Acting in Time on Energy Policy, edited by K Gallagher. Brookings Institution Press, Washington, DC, 39-55, 2009.

101.  Mikucki, JA, Pearson, A, Johnston, DT, Turchyn, AV, Farquhar, J, Schrag, DP, Anbar, AD, Priscu, JC, and Lee, PA. A contemporary microbially maintained subglacial ferrous “ocean.” Science, 324, 397-400. 2009.

100.  Fischer, WW, Schroeder, S, Lacassie, JP, Beukes, NJ, Goldber, T, Strauss, H, Horstmann, UE, Schrag, DP, and Knoll, AH. Isotopic constraints on the Late Archean carbon cycle from the Transvaal Supergroup along the western margin of the Kaapvall Craton, South Africa. Precambrian Research, 169, 15-27, 2009.

99.  Macdonald, FA, McClelland, WC, Schrag, DP, and Macdonald, WP. Neoproterozoic glaciations on a carbonate platform margin in Arctic Alaska and the origin of the North Slope subterrane. GSA Bulletin, 121, 448-473, 2009.

98.  Macdonald, FA, Jones, DS, and Schrag, DP. Stratigraphic and tectonic implications of a newly discovered glacial diamictite-cap carbonate couplet in southwestern Mongolia. Geology, 37, 123-126, 2009.

97.  House, KZ, Harvey, CF, Aziz, MJ, and Schrag, DP. The energy penalty of post-combustion CO2 capture and storage and its implications for retrofitting the U.S. installed base. Energy Environ. Sci., 2(2), 193-205, 2009.

96.  Hoffman, PF, Crowley, JW, Johnston, DT, Jones, DS, and Schrag, DP. Snowball prevention questioned. Nature, 456(7224), 2008.

95.  Anchukaitis, KJ, Evans, MN, Wheelwright, NT, and Schrag, DP. Stable isotope chronology and climate signal calibration in neotropical montane cloud forest trees. J. Geophys. Res., 113, 2008.

94.  Anchukaitis, KJ, Evans, MN, Lange, T, Smith, DR, Leavitt, SW, and Schrag, DP. Consequences of a rapid cellulose extraction technique for oxygen isotope radiocarbon analyses. Anal. Chem., 80(6), 2035-2041, 2008.

93.  Schrag, DP. About climate change. Reply. Elements, 3(6), 375, 2007.

92.  House, KZ, House, CH, Schrag, DP, and Aziz, MJ. Electrochemical acceleration of chemical weathering as an energetically feasible approach to mitigating anthropogenic climate change. Environ. Sci. Technol., 41(24), 8464-8470, 2007.

91.  Halevy, I, Zuber, MT, and Schrag, DP. A sulfur dioxide climate feedback on early Mars. Science, 318(5858), 1903-1907, 2007.

90.  Meister, P, Mckenzie, JA, Vaconcelos, C, Bernasconi, S, Frank, M, Gutjahr, M, and Schrag, DP. Dolomite formation in the dynamic deep biosphere: Results from the Peru Margin. Sedimentology, 54(5), 10007-1031, 2007.

89.  Schrag, DP. Confronting the climate-energy challenge. Elements, 3, 171-178, 2007.

88.  Hoffman, PF, Halverson, GP, Domack, EW, Husson, JM, Higgins, JA, and Schrag, DP. Are basal Ediacaran (635 Ma) post-glacial “cap dolostones” diachronous? Earth Planet Sci. Lett., 258(1-2), 114-131, 2007.

87.  Sivan, O, Schrag, DP, and Murray, RW. Rates of methanogenesis and methanotrophy in deep-sea sediments. Geobiology, 5(2), 141-151, 2007.

86.  Schrag, DP. Preparing to capture carbon. Science, 315, 812-813, 2007.

85.  Halverson, GP, Maloof, AC, Schrag, DP, Dudás, FÖ, and Hurtgen, M. Stratigraphy and geochemistry of ca 800 Ma negative carbon isotope interval in northeastern Svalbard. Chem. Geol., 237, 23-45, 2007.

84.  Rickaby, REM, Bard, E, Sonzogni, C, Rostek, F, Beaufort, L, Barker, S, Rees, G, and Schrag, DP. Coccolith chemistry reveals secular variations in the global ocean carbon cycle? Earth Planet. Sci. Lett., 253, 83-95, 2007.

83.  Turchyn, AV, Sivan, O, and Schrag, DP. Oxygen isotopic composition of sulfate in deep sea pore fluid: Evidence for rapid sulfur cycling. Geobiology, 4, 191-201, 2006.

82.  Maloof, AC, Halverson, GP, Kirschvink, JL, Schrag, DP, Weiss, BP, and Hoffman, PF. Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway. GSA Bulletin, 118, 1099-1124, 2006.

81.  House, KZ, Schrag, DP, Harvey, CF, and Lackner, KS. Permanent carbon dioxide storage in deep-sea sediments. Proc. Natl. Acad. Sci. U.S.A., 103, 12291-12295, 2006.

80.  Higgins, JA and Schrag, DP. Beyond Methane: Towards a Theory for Paleocene-Eocene Thermal Maximum. Earth Planet. Sci. Lett., 245, 523-537, 2006.

79.  Musgrove, M and Schrag, DP. Climate Change at Yucca Mountain: Lessons from Earth History, in Uncertainty Underground: Yucca Mountain and the Nation’s High-Level Nuclear Waste, edited by AM Macfarlane and RC Ewing. The MIT Press, Cambridge, MA, 149-162, 2006.

78.  Ghosh, P, Adkins, J, Affeck, H, Balta, B, Guo, W, Schauble, EA, Schrag, DP, and Eiler, JM. 13C–18O bonds in carbonate minerals: A new kind of paleothermometer. Geochim. Cosmochim. Acta, 70, 1439-1456, 2006.

77.  Biddle, JF, Lipp, JS, Lever, MA, Lloyd, KG, Sorensen, KB, Anderson, R, Fredricks, HF, Elvert, M, Kelly, TJ, Schrag, DP, Sogin, ML, Brenchley, JE, Teske, A, House, CH, and Hinricks, K-U. Heterotrophic Archaea dominate sedimentary subsurface ecosystems off Peru. Proc. Natl. Acad. Sci. U.S.A., 103(10), 3846-3851, 2006.

76.  Turchyn, AV and Schrag, DP. Cenozoic evolution of the sulfur cycle: Insight from oxygen isotopes in marine sulfate. Earth Planet. Sci. Lett., 241, 769-779, 2006.

75.  Rickaby, EMR and Schrag, DP. Biogeochemistry of carbonates: Recorders of past oceans and climate. Metal Ions in Biological Systems, 44, 241-268, 2005.

74.  Maloof, AC, Schrag, DP, Crowley, JL, and Bowring, SA. An expanded record of Early Cambrian carbon cycling from the Anti-Atlas Margin, Morocco. Can. J. Earth Sci., 42, 2195-2216, 2005.

73.  Li, C, Battisti, DS, Schrag, DP, and Tziperman, E. Abrupt climate shifts in Greenland due to displacements of the sea ice edge. Geophys. Res. Lett., 32(19), 2005.

72.  Halverson, GP, Hoffman, PF, Schrag, DP, Maloof, AC, and Rice, AHN. Toward a Neoproterozoic composite carbon-isotope record. GSA Bulletin, 117(9-10), 1181-1207, 2005.

71.  Poussart, PF and Schrag, DP. Seasonally resolved stable isotope chronologies from northern Thailand deciduous trees. Earth Planet. Sci. Lett., 235(3-4), 752-765, 2005.

70.  Moore, TS, Murray, RW, Kurtz, AC, and Schrag, DP. Anaerobic methane oxidation and the formation of dolomite. Earth Planet. Sci. Lett., 229(1-2), 141-154, 2004.

69.  Poussart, PF, Evans, MN, and Schrag, DP. Resolving seasonality in tropical trees: Multi-decade, high-resolution oxygen and carbon isotope records from Indonesia and Thailand. Earth Planet. Sci. Lett., 218(3-4), 301-316, 2004.

68.  Billups, K, Rickaby, REM, and Schrag, DP. Cenozoic pelagic Sr/Ca records: Exploring a link to paleoproductivity. Paleoceanography, 19(3), 2004.

67.  Rodgers, KB, Aumont, O, Madec, G, Menkes, C, Blanke, B, Monfray, P, Orr, JC, and Schrag, DP. Radiocarbon as a thermocline proxy for the eastern equatorial Pacific. Geophys. Res. Lett., 31(14), 2004.

66.  Schrag, DP and Alley, RB. Ancient lessons for our future climate. Science, 306, 821-822, 2004.

65.  Scott, KM, Schwedock, J, Schrag, DP, and Cavanaugh, CM. Influence of Form IA RubisCO and environmental dissolved inorganic carbon on the d13C of the clam-chemoautotroph symbiosis Solemya Velum. Environ. Microbiol., 6(12), 1210-1219, 2004.

64.  Evans, MN and Schrag, DP. A stable isotope-based approach to tropical dendroclimatology. Geochim. Cosmochim. Acta, 68(16), 3295-3305, 2004.

63.  Guilderson, T, Schrag, DP, and Cane, MA. Surface water mixing in the Solomon Sea as documented by a high-resolution coral 14C record. J. Climate, 17(5), 1147-1156, 2004.

62.  Turchyn, AV and Schrag, DP. Oxygen isotope constraints on the sulfur cycle over the past 10 million years. Science, 303, 2004-2007, 2004.

61.  Linsley, BK, Wellington, GM, Schrag, DP, Ren, L, Salinger, MJ, and Tudhope, AW. Geochemical evidence from corals for changes in the amplitude and spatial pattern of South Pacific interdecadal climate variability over the last 300 years. Clim. Dyn., 22(1), 1-11, 2004.

60.  Payne, JL, Lehrmann, DJ, Wei, JY, Orchard, MJ, Schrag, DP, and Knoll, AH. Large perturbations of the carbon cycle during recovery from the end-Permian extinction. Science, 305, 506-509, 2004.

59.  Billups, K and Schrag, DP. Application of foraminiferal Mg/Ca ratios to questions of Cenozoic climate change. Earth Planet. Sci. Lett., 209(1-2), 181-195, 2003.

58.  Patt, AG and Schrag, DP. Using specific language to describe risk and probability. Clim. Change, 61(1-2), 17-30, 2003.

57.  Adkins, JF and Schrag, DP. Reconstructing Last Glacial Maximum bottom water salinities from deep-sea sediment pore fluid profiles. Earth Planet. Sci. Lett., 216(1-2), 109-123, 2003.

56.  Higgins, JA and Schrag, DP. Aftermath of a snowball Earth. Geochem. Geophys. Geosyst., 4, 2003.

55.  Winter, A, Paul, A, Nyberg, J, Oba, T, Lundberg, J, Schrag, DP, and Taggart, B. Orbital control of low-latitude seasonality during the Eemian. Geophys. Res. Lett., 30(4), 2003.

54.  Ren, L, Linsley, BK, Wellington, GM, Schrag, DP, and Hoegh-Guldberg, O. Deconvolving the δ18O seawater component from subseasonal coral δ18O and Sr/Ca at Rarotonga in the Southwestern Subtropical Pacific for the period 1726-1997. Geochim. Cosmochim. Acta, 67(9), 1609-1621, 2003.

53.  Cochran, JK, Landman, NH, Turekian, KK, Michard, A, and Schrag, DP. Paleoceanography of the Late Cretaceous (Maastrichtian) Western Interior Seaway of North America: Evidence from Sr and O isotopes. Palaeogeogr. Palaeoclimatol. Palaeoecol., 191(1), 45-64, 2003.

52.  Adkins, JF, McIntyre, K, and Schrag, DP. The salinity, temperature, and δ18O of the glacial deep ocean. Science, 298, 1769-1773, 2002.

51.  Bard, E, Delaygue, G, Rostek, F, Antonioli, F, Silenzi, S, and Schrag, DP. Hydrological conditions over the western Mediterranean basin during the deposition of the cold Sapropel 6 (ca. 175 kyr BP). Earth Planet. Sci. Lett., 202(2), 481-494, 2002.

50.  Schrag, DP, Berner, RA, Hoffman, PF, and Halverson, GP. On the initiation of a snowball Earth. Geochem. Geophys. Geosyst., 3, 2002.

49.  Halverson, GP, Hoffman, PF, Schrag, DP, and Kaufman, AJ. A major perturbation of the carbon cycle before the Ghaub glaciation (Neoproterozoic) in Namibia: Prelude to snowball Earth? Geochem. Geophys. Geosyst., 3, 2002.

48.  Schrag, DP and McCarthy, JJ. Biological-physical interactions and global climate change: Some lessons from Earth history, in The Sea, Vol. 12, edited by AR Robinson, JJ McCarthy, and BJ Rothschild. John Wiley & Sons, Inc., New York, 605-619, 2002.

47.  Rickaby, REM and Schrag, DP. Growth rate dependence of Sr incorporation during calcification of Emiliania huxleyi. Global Biogeochem. Cycles, 16(1), 2002.

46.  Hoffman, PF and Schrag, DP. The snowball Earth hypothesis: Testing the limits of global change. Terra Nova, 14(3), 129-155, 2002.

45.  Kirk-Davidoff, DB, Schrag, DP, and Anderson, JG. On the feedback of stratospheric clouds on polar climate. Geophys. Res. Lett., 10, 1029-1032, 2002.

44.  Billups, K and Schrag, DP. Paleotemperatures and ice-volume of the past 27 Myr revisited with paired Mg/Ca and 18O/16O measurements on benthic foraminifera. Paleoceanography, 17(1), 2002.

43.  Milne, GA, Mitrovica, JX, and Schrag, DP. Estimating past continental ice volume from sea-level data. Quat. Sci. Rev., 21(1-3), 361-376, 2002.

42.  Schrag, DP, Adkins, JF, McIntyre, K, Alexander, JL, Hodell, DA, Charles, CD, and McManus, JF. The oxygen isotopic composition of seawater during the Last Glacial Maximum. Quat. Sci. Rev., 21(1-3), 331-342, 2002.

41.  Schrag, DP and Linsley, BK. Paleoclimate: Corals, chemistry, and climate. Science, 296, 277-278, 2002.

40.  Evans, MN, Cane, MA, Schrag, DP, Kaplan, A, Linsley, BK, Villalba, B, and Wellington, GM. Support for tropically-driven Pacific decadal variability based on paleoproxy evidence. Geophys. Res. Lett., 28(19), 3689-3692, 2001.

39.  Druffel, ER, Griffin, S, Guilderson, TP, Kashgarian, M, Southon, J, and Schrag, DP. Changes in subtropical North Pacific radiocarbon and their correlation with climate variability. Radiocarbon, 43(1), 15-25, 2001.

38.  Schrag, DP and Hoffman, PF. Life, geology and snowball Earth. Nature, 409, 306, 2001.

37.  Stoll, HM and Schrag, DP. Sr/Ca variations in Cretaceous carbonates: Relation to productivity and sea level changes. Palaeogeogr. Palaeoclimatol. Palaeoecol., 168(3-4), 311-336, 2001.

36.  Adkins, JF and Schrag, DP. Pore fluid constraints on deep ocean temperature and salinity during the Last Glacial Maximum. Geophys. Res. Lett., 28(5), 771-774, 2001.

35.  Hoffman, PF and Schrag, DP. Doomed to a deep freeze? Reply. Sci. Amer., 282(5), 14, 2000.

34.  Linsley, BK, Wellington, GM, and Schrag, DP. Decadal sea surface temperature variability in the sub-tropical South Pacific from 1726 to 1997 A.D. Science, 290, 1145-1148, 2000.

33.  O’Brien, DM, Schrag, DP, and Martinez Del-Rio, C. Allocation to reproduction in a hawkmoth: A quantitative analysis using stable carbon isotopes. Ecology, 81(10), 2822-2831, 2000.

32.  Guilderson, TP, Schrag, DP, Goddard, EA, Kashgarian, M, Wellington, GM, and Linsley, BK. Southwest subtropical Pacific surface water radiocarbon in a high-resolution coral record. Radiocarbon, 42(2), 249-256, 2000.

31.  Rodgers, KB, Schrag, DP, Cane, MA, and Naik, NH. The bomb 14C transient in the Pacific Ocean. JGR-Oceans, 105, 8489-8512, 2000.

30.  Stoll, HM and Schrag, DP. Coccolith Sr/Ca as a new indicator of coccolithophorid calcification and growth rate. Geochem. Geophys. Geosyst., 1, 2000.

29.  Eshel, G, Schrag, DP, and Farrell, BF. Troposphere-planetary boundary layer interactions and the evolution of surface density: Lessons from Red Sea corals. J. Climate, 13(2), 339-351, 2000.

28.  Schrag, DP. Of ice and elephants. Nature, 404, 23-24, 2000.

27.  Gagan, MK, Ayliffe, LK, Beck, JW, Cole, JE, Druffel, ERM, Dunbar, RB, and Schrag, DP. New views of tropical paleoclimates from corals. Quat. Sci. Rev., 19(1-5), 45-64, 2000.

26.  Stoll, HM and Schrag, DP. High resolution stable isotope records from the Upper Cretaceous of Italy and Spain: Glacial episodes in a greenhouse planet? GSA Bulletin, 112(2), 308-319, 2000.

25.  Billups, K and Schrag, DP. Surface ocean density gradients during the Last Glacial Maximum. Paleoceanography, 15(1), 110-123, 2000.

24.  Hoffman, PF and Schrag, DP. Snowball Earth. Sci. Amer., 282(1), 68-75, 2000.

23.  Hoffman, PF and Schrag, DP. Response to comment by N Christie-Blick, LE Sohl, and MJ Kennedy. Science, 284, 1087, 1999.

22.  Hughen, KA, Schrag, DP, Jacobsen, SB, and Hantoro, W. El Niño during the last Interglacial recorded by fossil corals from Indonesia. Geophys. Res. Lett., 26(20), 3129-3132, 1999.

21.  Stoll, HM, Schrag, DP, and Clemens, S. Are seawater Sr/Ca variations preserved in Quaternary foraminifera? Geochim. Cosmochim. Acta, 63(21), 3535-3547, 1999.

20.  Schrag, DP. Effects of diagenesis on isotopic record of late Paleogene equatorial sea surface temperatures. Chem. Geol., 161(1-3), 215-224, 1999.

19.  Rodgers, KB, Cane, MA, Naik, NH, and Schrag, DP. The role of the Indonesian Throughflow in equatorial Pacific thermocline ventilation. JGR-Oceans, 104, 20551-20570, 1999.

18.  Guilderson, TP and Schrag, DP. Reliability of coral isotope records from the western Pacific warm pool: A comparison using age-optimized records. Paleoceanography, 14(4), 457-464, 1999.

17.  Schrag, DP. Rapid determination of high-precision Sr/Ca ratios in corals and other marine carbonates. Paleoceanography, 14(2), 97-102, 1999.

16.  O’Brien, DM, Schrag, DP, and Martinez Del Rio, C. Measuring allocation of nectar nutrients to reproduction in a hawkmoth: A novel method using stable carbon isotopes. Amer. Zool., 38(5), 172A, 1998.

15.  Hoffman, PF, Schrag, DP, Halverson, GP, and Kaufman, JA. An early snowball Earth? Response. Science, 282(5394), 1645-1646, 1998.

14.  Guilderson, TP, Schrag, DP, Kashgarian, M, and Southon, J. Radiocarbon variability in the western equatorial Pacific inferred from a high-resolution coral record from Nauru Island. JGR-Oceans, 103, 24641-24650, 1998.

13.  Hoffman, PF, Kaufman, AJ, Galverson, GP, and Schrag, DP. A Neoproterozoic snowball Earth. Science, 281, 1342-1346, 1998.

12.  Guilderson, TP and Schrag, DP. Abrupt shift in subsurface temperatures in the Eastern Tropical Pacific associated with recent changes in El Niño. Science, 281, 240-243, 1998.

11.  Stoll, HM and Schrag, DP. Effect of quaternary sea level cycles on the Sr concentration of seawater. Geochim. Cosmochim. Acta, 62(7), 1107-1118, 1998.

10.  Gieskes, JM, Schrag, DP, Chan, L-H, Zhang, L, and Murray, J. Geochemistry of interstitial waters, in Proc. ODP, Sci. Results, 152, 293-305, edited by AD Saunders, HC Larsen, and SW Wise, Jr. Ocean Drilling Program, College Station, TX, 1998.

9.  Schrag, DP, Hampt, G, and Murray, DW. Oxygen isotopic composition of interstitial waters from Leg 154: Determination of the temperature and isotopic composition of the glacial ocean, in Proc. ODP, Sci. Results, 154, 201-206, edited by NJ Shackleton, WB Curry, C Richter, and TJ Bralower. Ocean Drilling Program, College Station, TX, 1997.

8.  Rodgers, KB, Cane, MA, and Schrag, DP. Seasonal variability of sea surface Δ14C in the equatorial Pacific in an ocean circulation model. JGR-Oceans, 102, 18627-18639, 1997.

7.  Moore, MD, Schrag, DP, and Kashgarian, M. Radiocarbon constraints on the source Indonesian seaway from coral AMS measurements. JGR-Oceans, 102, 12359-12365, 1997.

6.  Schrag, DP, Hampt, G, and Murray, DW. Pore fluid constraints on the temperature and oxygen isotopic composition of the glacial ocean. Science, 272, 1930-1932, 1996.

5.  Stoll, HM and Schrag, DP. Glacial control of rapid sea level changes in the Early Cretaceous. Science, 272, 1771-1774, 1996.

4.  Schrag, DP, DePaolo, DJ, and Richter, FM. Reconstructing past sea surface temperatures: Correcting for diagenesis of bulk marine carbonate. Geochim. Cosmochim. Acta, 59(11), 2265-2278, 1995.

3.  Schrag, DP and DePaolo, DJ. Determination of δ18O of seawater in the deep ocean during the last glacial maximum. Paleoceanography, 8(1), 1-6, 1993.

2.  Schrag, DP, DePaolo, DJ, and Richter, FM. Oxygen isotope exchange in a two-layer model of oceanic crust. Earth Planet. Sci. Lett., 111(2-4), 305-317, 1992.

1.  Hoffman, DL, Krupp, L, Schrag, DP, Nilaver, G, Valiquette, G, Kilcoyne, MM, and Zimmerman, EA. Angiotensin immunoreactivity in vasopressin cells in rat hypothalamus and its relative deficiency in homozygous Brattleboro rat. Ann. New York Acad. Sci., 394, 135-141, 1982.

References
  1. "Daniel Schrag". www.hks.harvard.edu. Retrieved 2020-12-01.
  2. Daniel Schrag - Harvard University, Harvard University, retrieved 8 September 2010
  3. "Publications". scholar.harvard.edu. Retrieved 2020-12-01.
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