دورية أكاديمية
Abrupt change in tropical Pacific climate mean state during the Little Ice Age
| العنوان: | Abrupt change in tropical Pacific climate mean state during the Little Ice Age |
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| المؤلفون: | Ana Prohaska, Alistair W. R. Seddon, Bernd Meese, Katherine J. Willis, John C. H. Chiang, Dirk Sachse |
| المصدر: | Communications Earth & Environment, Vol 4, Iss 1, Pp 1-13 (2023) |
| بيانات النشر: | Nature Portfolio, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Geology LCC:Environmental sciences |
| مصطلحات موضوعية: | Geology, QE1-996.5, Environmental sciences, GE1-350 |
| الوصف: | Abstract The mean state of the tropical Pacific ocean-atmosphere climate, in particular its east-west asymmetry, has profound consequences for regional climates and for the El Niño/Southern Oscillation variability. Here we present a new high-resolution paleohydrological record using the stable-hydrogen-isotopic composition of terrestrial-lipid biomarkers (δDwax) from a 1,400-year-old lake sedimentary sequence from northern Philippines. Results show a dramatic and abrupt increase in δDwax values around 1630 AD with sustained high values until around 1900 AD. We interpret this change as a shift to significantly drier conditions in the western tropical Pacific during the second half of the Little Ice Age as a result of a change in tropical Pacific mean state tied to zonal sea surface temperature (SST) gradients. Our findings highlight the prominent role of abrupt shifts in zonal SST gradients on multidecadal to multicentennial timescales in shaping the tropical Pacific hydrology of the last millennium, and demonstrate that a marked transition in the tropical Pacific mean state can occur within a period of a few decades. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2662-4435 |
| Relation: | https://doaj.org/toc/2662-4435 |
| DOI: | 10.1038/s43247-023-00882-7 |
| URL الوصول: | https://doaj.org/article/b42b5987e2874470a1dc5258cb8ce7a3 |
| رقم الأكسشن: | edsdoj.b42b5987e2874470a1dc5258cb8ce7a3 |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 26624435 |
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| DOI: | 10.1038/s43247-023-00882-7 |