气候变化领域集成服务门户(CCPortal): Significant transient pCO 2 perturbation at the New Zealand Oligocene-Miocene transition recorded by fossil plant stomata

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DOI	10.1016/j.palaeo.2018.01.039
	Significant transient pCO 2 perturbation at the New Zealand Oligocene-Miocene transition recorded by fossil plant stomata
	Steinthorsdottir M.; Vajda V.; Pole M.
发表日期	2019
ISSN	0031-0182
起始页码	152
结束页码	161
卷号	515
英文摘要	The reorganisation of Earth's climate system from the Oligocene to the Miocene was influenced by complex interactions between Tethyan tectonics, orbital parameters, oceanographic changes, and carbon cycle feedbacks, with climate modelling indicating that pCO 2 was an important factor. Oscillating episodes of climate change during the Oligocene–Miocene transition (OMT) have however been difficult to reconcile with existing pCO 2 records. Here we present a new pCO 2 record from the OMT into the early Miocene, reconstructed using the stomatal proxy method with a database of fossil Lauraceae leaves from New Zealand. The leaf database derives from three relatively well-dated sites located in the South Island of New Zealand; Foulden Maar, Mataura River and Grey Lake. Atmospheric pCO 2 values were obtained based on four separate calibrations with three nearest living equivalents, using the stomatal ratio method as well as transfer functions. Our results, based on the mean values of each of the four calibrations, indicate pCO 2 ranging ~582–732 ppm (average 650 ppm) at the OMT, falling precipitously to mean values of ~430–538 ppm (average 492 ppm) for the earliest Miocene and ~454–542 ppm (average 502 ppm) in the early Miocene. The much higher values of pCO 2 at the OMT indicate that pCO played an important role in climate dynamics during this time, potentially including the abrupt termination of glaciations. © 2018 The Authors
英文关键词	Climate change; Lauraceae; Mi-1 termination; Oligocene–Miocene boundary; Stomatal proxy
语种	英语
scopus关键词	angiosperm; calibration; carbon cycle; carbon dioxide; climate feedback; climate modeling; climate variation; complexity; fossil record; Miocene; Oligocene; proxy climate record; stomatal conductance; Tethys; New Zealand; South Island; Lauraceae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151118
作者单位	Department of Palaeobiology, Swedish Museum of Natural History, Stockholm, SE 104 05, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, SE 109 61, Sweden; Queensland Herbarium, Brisbane Botanic Gardens, Mt. Coot-tha, Mt. Coot-tha Rd., ToowongQLD 4066, Australia
推荐引用方式 GB/T 7714	Steinthorsdottir M.,Vajda V.,Pole M.. Significant transient pCO 2 perturbation at the New Zealand Oligocene-Miocene transition recorded by fossil plant stomata[J],2019,515.
APA	Steinthorsdottir M.,Vajda V.,&Pole M..(2019).Significant transient pCO 2 perturbation at the New Zealand Oligocene-Miocene transition recorded by fossil plant stomata.Palaeogeography, Palaeoclimatology, Palaeoecology,515.
MLA	Steinthorsdottir M.,et al."Significant transient pCO 2 perturbation at the New Zealand Oligocene-Miocene transition recorded by fossil plant stomata".Palaeogeography, Palaeoclimatology, Palaeoecology 515(2019).