In the almost two decades since he received his Ph.D., Jerry McManus has led a global effort to understand the influence of past climate change on the world’s oceans. Of exceptional quality and quantity, Jerry’s research is essentially the marine complement of Willi Dansgaard’s groundbreaking work on ice cores, making Jerry truly an apt candidate for this particular award. Jerry has had an enormous influence on the field of paleoclimatology and paleoceanography, and his insights into the mechanisms of natural climate variability on orbital to millennial timescales are of great relevance to the understanding of current anthropogenic climate change.
Early in his career, Jerry used high-resolution geochemical and sedimentological data from the North Atlantic to show how the oceanography and circulation of this region were linked to atmospheric changes observed in ice cores. A powerful series of papers documented the behavior of North Atlantic sea surface temperatures as well as the pattern of iceberg and freshwater delivery to the region. Then, using an innovative application of the Protactinium/Thorium method, he published the first continuous record of deepwater export from the North Atlantic showing that major cooling events such as the Younger Dryas and Heinrich Event 1 were accompanied by a reduction in deepwater export out of the North Atlantic, confirming the links between climate variability at high latitudes and thermohaline circulation. Most recently, he and his students have published groundbreaking papers on Arctic and Atlantic Ocean circulation, migration of the inter-tropical convergence zone/tropical rain belts, and the role of iron fertilization in climate change.
Jerry McManus also has an impressive record of scientific collaboration and international leadership as well as mentorship of junior scientists, including advising over 20 graduate students and postdoctoral scientists. At Columbia University, Jerry has been recognized for his dedication to teaching, including Columbia University Best Faculty Teaching Awards at both the graduate and undergraduate level. In summary, Jerry has made seminal contributions to the study of the abrupt climatic changes that occurred during glacial periods, and he is a leading figure and international authority on the subjects of Heinrich/D-O events, Atlantic thermohaline circulation in the past, and interglacial climates. He is a widely sought after speaker and has an outstanding record of mentorship, teaching, and student training. I cannot think of a more perfect person to be awarded the Willi Dansgaard Award of the AGU.
—Maureen Raymo, Lamont Doherty Earth Observatory, Palisades, N.Y.