RT Journal Article SR Electronic T1 Toward Integrated Reconstruction of Past Climates JF Science JO Science FD American Association for the Advancement of Science SP 589 OP 590 DO 10.1126/science.1083122 VO 300 IS 5619 A1 Trenberth, Kevin E. A1 Otto-Bliesner, Bette L. YR 2003 UL http://science.sciencemag.org/content/300/5619/589.abstract AB