The smoothly curving, parallel lines near the top of both figures represent the estimated range of possible density of North Atlantic Deep Water between the temperature extremes of 1 and 3 degrees Celsius. The jagged solid line in figure A, above, represents the calculated density of surface water at the core site in the northeast Atlantic. Note that density drops steeply during Heinrich events (H1 to H4 in the figure). The jagged lines in figure B, below, represent the density of this surface water if cooled a further 1 degree (bottom line) or 6 degrees Celsius (top line) as it flows northward. Deep-water formation is only possible during the periods between the downward-pointing arrows, when density rises above the critical threshhold.
Source: M. A. Maslin, N. J. Shackleton, and U. Pflaumann, "Surface Water Temperature, Salinity, and Density Changes in the Northeast Atlantic During the Last 45,000 Years: Heinrich Events, Deep Water Formation, and Climatic Rebounds," Paleoceanography Vol. 10, no. 3 (June, 1995), pp. 527-544.
Back to Figures for "Minds in Ablation".
Back to my interests.
Back to my home page.
Search my pages.
Last modified by pib on October 28, 2003.