Terrestrial climate evolution in the Southwest Pacific over the past 30 million years
| Autor: | J. Ian Raine, David R. Greenwood, Dallas C. Mildenhall, Joseph G. Prebble, Elizabeth M. Kennedy, Tammo Reichgelt, Hannu Seebeck |
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| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Biome Vegetation 15. Life on land Seasonality 010502 geochemistry & geophysics medicine.disease medicine.disease_cause Neogene 01 natural sciences Tectonics Paleontology Geophysics 13. Climate action Space and Planetary Science Geochemistry and Petrology Pollen Paleoclimatology Earth and Planetary Sciences (miscellaneous) medicine Precipitation Physical geography Geology 0105 earth and related environmental sciences |
| Zdroj: | Earth and Planetary Science Letters. 459:136-144 |
| ISSN: | 0012-821X |
| Popis: | A reconstruction of terrestrial temperature and precipitation for the New Zealand landmass over the past ∼30 million years is produced using pollen data from >2000 samples lodged in the New Zealand Fossil Record Electronic Database and modern climate data of nearest living relatives. The reconstruction reveals a warming trend through the late Oligocene to early Miocene, peak warmth in the middle Miocene, and stepwise cooling through the late Neogene. Whereas the regional signal in our reconstruction includes a ∼5–10° northward tectonic drift, as well as an increase in high altitude biomes due to late Neogene and Pliocene uplift of the Southern Alps, the pattern mimics inferred changes in global ice extent, which suggests that global drivers played a major role in shaping local vegetation. Importantly, seasonal temperature estimates indicate low seasonality during the middle Miocene, and that subsequent Neogene cooling was largely due to cooler winters. We suggest that this may reflect increased Subantarctic influence on New Zealand vegetation as the climate cooled. |
| Databáze: | OpenAIRE |
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