Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific.

Thus, radiocarbon ventilation reconstructions from throughout the mid-depth (∼500–1,500 m) and deep (>1,500 m) Pacific are in apparent conflict, with some indicating very little or no change in radiocarbon ventilation between the Last Glacial Maximum (LGM) and the pre-industrial period 3 7 8 9 10 11 12 13 , some indicating transient anomalies of varying magnitude and sense 14 15 16 17 , and with others showing quite significant changes, expressed as a net change between the LGM and the pre-industrial 18 19 20 21 or as a positive anomaly in the deglaciation 22 23 24 25 ( Table 1 ).

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