 |
| Titel |
Interglacial and glacial variability from the last 800 ka in marine, ice and terrestrial archives |
| VerfasserIn |
N. Lang, E. W. Wolff |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 7, no. 2 ; Nr. 7, no. 2 (2011-04-21), S.361-380 |
| Datensatznummer |
250004505
|
| Publikation (Nr.) |
 copernicus.org/cp-7-361-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| We have compiled 37 ice, marine and terrestrial palaeoclimate records
covering the last 800 000 years in order to assess the pattern of glacial and
interglacial strength, and termination amplitude. Records were selected
based on their length, completeness and resolution, and their age models
were updated, where required, by alignment to the LR04 benthic δ18O
stack. The resulting compilation allows comparison of individual
glacial to interglacial transitions with confidence, but the level of
synchronisation is inadequate for discussion of temporal phasing. The
comparison of interglacials and glacials concentrates on the peaks
immediately before and after terminations; particularly strong and weak
glacials and interglacials have been identified. This confirms that strong
interglacials are confined to the last 450 ka, and that this is a globally
robust pattern; however weak interglacials (i.e. marine isotope stage 7) can
still occur in this later period. Strong glacial periods are also
concentrated in the recent half of the records, although marine isotope
stage 16 is strong in many δ18O records. Strong interglacials,
particularly in the marine isotopic records, tend to follow strong glacials,
suggesting that we should not expect interglacial strength to be strongly
influenced by the instantaneous astronomical forcing. Many interglacials
have a complex structure, with multiple peaks and troughs whose origin needs
to be understood. However this compilation emphasises the
under-representation of terrestrial environments and highlights the need for
long palaeoclimate records from these areas. The main result of this work is
the compiled datasets and maps of interglacial strength which provide
a target for modelling studies and for conceptual understanding. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|