@article{121,
  author = {Liangquan Li and Gerta Keller},
  title = {Abrupt deep-sea warming at the end of the Cretaceous},
  abstract = {<p>Climatic and oceanographic variations during the last 2 m.y. of the Maastrichtian inferred from high-resolution (10 k.y.) stable isotope analysis of the mid-latitude South Atlantic Deep Sea Drilling Project Site 525 reveal a major warm pulse followed by rapid cooling prior to the Cretaceous-Tertiary boundary. Between 66.85 and 65.52 Ma, cool but fluctuating temperatures average 9.9 and 15.4 {\textdegree}C in intermediate and surface waters, respectively. This interval is followed by an abrupt short-term warming between 65.45 and 65.11 Ma, which increased temperatures by 2{\textendash}3 {\textdegree}C in intermediate waters, and decreased the vertical thermal gradient to an average of 2.7 {\textdegree}C. This warm pulse may be linked to increased atmospheric pCO2, increased poleward heat transport, and the switch of an intermediate water source from high to low-middle latitudes. During the last 100 k.y. of the Maastrichtian, intermediate and surface temperatures decreased by an average of 2.1 and 1.4 {\textdegree}C, respectively, compared to the maximum temperature between 65.32 and 65.24 Ma.\&nbsp; <a href="https://geoweb.princeton.edu/research/keller/pubs/Li_and_Keller_1998_Geol_525.pdf" target="_blank">PDF</a></p>
},
  year = {1998},
  journal = {Geology},
  volume = {26},
  pages = {995-998},
  url = {http://geology.gsapubs.org/content/26/11/995.abstract},
  doi = {10.1130/0091-7613(1998)026<0995:ADSWAT>2.3.CO;2},
  language = {eng},
}