(Table 1) Age determination of DSDP Hole 94-607 and sediment cores V30-101 and V23-81
Fuente:
PANGAEA
Salvato in:
| Autori principali: | , , , , , , |
|---|---|
| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
1993
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1867169038687272960 |
|---|---|
| author | Bond, Gerard C Broecker, Wallace S Johnsen, Sigfús Jóhann McManus, James Labeyrie, Laurent D Jouzel, Jean Bonani, Georges |
| author_facet | Bond, Gerard C Broecker, Wallace S Johnsen, Sigfús Jóhann McManus, James Labeyrie, Laurent D Jouzel, Jean Bonani, Georges |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Oxygen isotope measurements in Greenland ice demonstrate that a series of rapid warm-cold oscillations -called Dansgaard-Oeschger events- punctuated the last glaciation (Dansgard et al., 1993, doi:10.1038/364218a0). Here we present records of sea surface temperature from North Atlantic sediments spanning the past 90 kyr which contain a series of rapid temperature oscillations closely matching those in the ice-core record, confirming predictions that the ocean must bear the imprint of the Dansgaard–Oeschger events (Broecker et al., 1988, doi:10.1016/0033-5894(88)90082-8; 1990, doi:10.1029/PA005i004p00469). Moreover, we show that between 20 and 80 kyr ago, the shifts in ocean-atmosphere temperature are bundled into cooling cycles, lasting on average 10 to 15 kyr, with asymmetrical saw-tooth shapes. Each cycle culminated in an enormous discharge of icebergs into the North Atlantic (a 'Hein-rich event' (Bond et al., 1992, doi:10.1038/360245a0; Broecker et al., 1992, doi:10.1007/BF00193540), followed by an abrupt shift to a warmer climate. These cycles document a previously unrecognized link between ice sheet behaviour and ocean-atmosphere temperature changes. An important question that remains to be resolved is whether the cycles are driven by external factors, such as orbital forcing, or by inter-nal ice-sheet dynamics. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_769892 |
| institution | PANGAEA |
| language | en |
| publishDate | 1993 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Age determination of DSDP Hole 94-607 and sediment cores V30-101 and V23-81 Bond, Gerard C Broecker, Wallace S Johnsen, Sigfús Jóhann McManus, James Labeyrie, Laurent D Jouzel, Jean Bonani, Georges 94-609; Age, 14C calibrated; Age, dated; Age, dated, standard deviation; Age, dated material; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg94; North Atlantic/FLANK; PC; Piston corer; V23; V23-81; V30; V30-101; Vema Oxygen isotope measurements in Greenland ice demonstrate that a series of rapid warm-cold oscillations -called Dansgaard-Oeschger events- punctuated the last glaciation (Dansgard et al., 1993, doi:10.1038/364218a0). Here we present records of sea surface temperature from North Atlantic sediments spanning the past 90 kyr which contain a series of rapid temperature oscillations closely matching those in the ice-core record, confirming predictions that the ocean must bear the imprint of the Dansgaard–Oeschger events (Broecker et al., 1988, doi:10.1016/0033-5894(88)90082-8; 1990, doi:10.1029/PA005i004p00469). Moreover, we show that between 20 and 80 kyr ago, the shifts in ocean-atmosphere temperature are bundled into cooling cycles, lasting on average 10 to 15 kyr, with asymmetrical saw-tooth shapes. Each cycle culminated in an enormous discharge of icebergs into the North Atlantic (a 'Hein-rich event' (Bond et al., 1992, doi:10.1038/360245a0; Broecker et al., 1992, doi:10.1007/BF00193540), followed by an abrupt shift to a warmer climate. These cycles document a previously unrecognized link between ice sheet behaviour and ocean-atmosphere temperature changes. An important question that remains to be resolved is whether the cycles are driven by external factors, such as orbital forcing, or by inter-nal ice-sheet dynamics. |
| title | (Table 1) Age determination of DSDP Hole 94-607 and sediment cores V30-101 and V23-81 |
| topic | 94-609; Age, 14C calibrated; Age, dated; Age, dated, standard deviation; Age, dated material; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg94; North Atlantic/FLANK; PC; Piston corer; V23; V23-81; V30; V30-101; Vema |
| url | https://doi.org/10.1594/PANGAEA.769892 |