 |
| Titel |
The use of seasonally resolved temperature data to identify the cause of marine climate change |
| VerfasserIn |
Andrew Johnson, Annemarie Valentine, Melanie Leng, Hilary Sloane, Bernd Schöne, Donna Surge |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250154020
|
| Publikation (Nr.) |
 EGU/EGU2017-19064.pdf |
|
|
|
|
|
| Zusammenfassung |
| On the continental shelf of the eastern USA, seasonal variation in water temperature is much
lower south of Cape Hatteras than it is to the north as a result of the influence of warm
currents, which raise winter temperature. High temperatures north of Cape Hatteras during
the Pliocene have been attributed to greater northward penetration of warm currents in the
absence of a feature analogous to Cape Hatteras. However, oxygen isotope thermometry
using serial ontogenetic samples from scallops reveals a high seasonal temperature range at
some horizons, suggesting that overall warming was the consequence of general climate
change, with the absence of a ‘Cape Hatteras’ feature allowing greater southward penetration
of cold currents, resulting in low winter temperatures at a southerly latitude. Evidence from
other taxa indicates that at times seasonal variation in water temperature was quite low and
that there was greater northward penetration of warm currents. This may relate to
increases in vigour of the Gulf Stream. The study shows how seasonally resolved
temperature data can assist identification of the driving forces of marine climate change. |
|
|
|
|
|
|