نتایج جستجو برای: palaeo climatology

تعداد نتایج: 5260  

2014
Lijun He Aibing Zhang David Weese Shengfa Li Jiansheng Li Jing Zhang

Glacial cycles of the Quaternary have heavily influenced the demographic history of various species. To test the evolutionary impact of palaeo-geologic and climatic events on the demographic history of marine taxa from the coastal Western Pacific, we investigated the population structure and demographic history of two economically important fish (Trichiurus japonicus and T. nanhaiensis) that in...

2016
Dengmei Fan Wan Hu Bo Li Ashley B. Morris Min Zheng Douglas E. Soltis Pamela S. Soltis Zhiyong Zhang

Subtropical evergreen broad-leaved forest (EBLF) is one of the most important vegetation types in China. Inferences from palaeo-biome reconstruction (PBR) and phylogeography regarding range shift history of EBLF during the late Quaternary are controversial and should be reconciled. We compared phylogeographic patterns of three EBLF constituents in China, Castanopsis tibetana, Machilus thunbergi...

2016
Marta Rodríguez-Rey Salvador Herrando-Pérez Barry W Brook Frédérik Saltré John Alroy Nicholas Beeton Michael I Bird Alan Cooper Richard Gillespie Zenobia Jacobs Christopher N Johnson Gifford H Miller Gavin J Prideaux Richard G Roberts Chris S M Turney Corey J A Bradshaw

The study of palaeo-chronologies using fossil data provides evidence for past ecological and evolutionary processes, and is therefore useful for predicting patterns and impacts of future environmental change. However, the robustness of inferences made from fossil ages relies heavily on both the quantity and quality of available data. We compiled Quaternary non-human vertebrate fossil ages from ...

Journal: :Proceedings. Biological sciences 2015
Emma S M Boston W Ian Montgomery Rosaleen Hynes Paulo A Prodöhl

Despite recent advances in the understanding of the interplay between a dynamic physical environment and phylogeography in Europe, the origins of contemporary Irish biota remain uncertain. Current thinking is that Ireland was colonized post-glacially from southern European refugia, following the end of the last glacial maximum (LGM), some 20 000 years BP. The Leisler's bat (Nyctalus leisleri), ...

Journal: :Frontiers in Earth Science 2021

Palaeo-wildfire, which had an important impact on the end Permian terrestrial ecosystems, became more intense in latest globally, evidenced by extensive occurrence of fossil charcoals. In this study, we report abundant charcoals from upper part Xuanwei Formation and Permian–Triassic transitional Kayitou Lengqinggou section, western Guizhou Province, Southwest China. These are well-preserved wit...

2008
A. F. Pazmino

1) Why did the authors consider a zonal mean climatology for their baseline? Why not use a spatial (lat-lon) climatology? Over the SH the stratosphere and the ozone layer have a distinct asymmetry determined by the presence of the quasi stationary wave 1. Furthermore, as noted in Malanca et al. (2005), this important aspect of mid to high latitude TOC has changed over time both in intensity and...

Journal: :Proceedings. Biological sciences 2004
Richard E Glor Matthew E Gifford Allan Larson Jonathan B Losos Lourdes Rodríguez Schettino Ada R Chamizo Lara Todd R Jackman

Sympatric speciation is often proposed to account for species-rich adaptive radiations within lakes or islands, where barriers to gene flow or dispersal may be lacking. However, allopatric speciation may also occur in such situations, especially when ranges are fragmented by fluctuating water levels. We test the hypothesis that Miocene fragmentation of Cuba into three palaeo-archipelagos accomp...

2015
Kelsey Mulder Kelsey J. Mulder

The winners of the poster prizes are below Kelsey Mulder presenting her poster We present a climatology for tornadoes in the British Isles, defined here as England, Scotland, Wales, Northern Ireland, Republic of Ireland, Channel Islands, and the Isle of Man. The climatology includes the geographic distribution, annual and diurnal cycles, seasonality, intensities, and occurrence of outbreaks in ...

Journal: :تحقیقات جغرافیایی 0
مهدی مسترشد دانشگاه اصفهان

daily precipitation data from aphrodite's resources with a spatial resolution of 0.25*0.25 degree for 57 years have been used to detect the trend of precipitation in afghanistan. first of all, monthly, seasonally, and yearly maps and regional mean time series calculated. according to the annual map, mean annual precipitation of the country is about 256 mm. there are two precipitation maxim...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Boualem Khouider Andrew J Majda Markos A Katsoulakis

Prototype coarse-grained stochastic parametrizations for the interaction with unresolved features of tropical convection are developed here. These coarse-grained stochastic parametrizations involve systematically derived birth/death processes with low computational overhead that allow for direct interaction of the coarse-grained dynamical variables with the smaller-scale unresolved fluctuations...

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