Zobrazeno 1 - 10
of 85
pro vyhledávání: '"L. Bruce Railsback"'
Publikováno v:
International Journal of Speleology, Vol 42, Iss 3, Pp 167-180 (2013)
Petrographic recognition of layer-bounding surfaces in stalagmites offers an important tool in constructing paleoclimate records. Previous petrographic efforts have examined thickness of layers (a possible proxy for annual rainfall) and alternation o
Externí odkaz:
https://doaj.org/article/b8cc0817e4ba4b538f96707f89fab251
Publikováno v:
Journal of Sedimentary Research. 91:464-478
The uncertainty of measurements of carbon and oxygen stable-isotope ratios of carbonate materials is commonly assumed to be the analytical uncertainty determined from replicate analyses of single samples, but this ignores the possibility that heterog
Autor:
L. Bruce Railsback, George A. Brook, M. Razanatseheno, Xianglei Li, Gayatri Kathayat, A.F.M. Rakotondrazafy, Ny Riavo G. Voarintsoa, Lauren Gregoire, Hai Cheng, R. Lawrence Edwards, Louise C. Sime, Julia Tindall, Ilkka Matero
Publikováno v:
Quaternary Science Reviews. 204:172-186
The 8.2 ka event is a well-known cooling event in the Northern Hemisphere, but is poorly understood in Madagascar. Here, we compare paleoclimate data and outputs from paleoclimate simulations to better understand it. Records from Madagascar suggest t
Autor:
Laura A. Dupont, L. Bruce Railsback, Fuyuan Liang, George A. Brook, Hai Cheng, R. Lawrence Edwards
Publikováno v:
Quaternary Science Reviews. 286:107552
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 586:110756
The 4.2 ka Event has generally been regarded as a period of decades to at most a few centuries in which comparatively dry conditions existed in the Middle East and more broadly across the mid-latitude Northern Hemisphere. This paper presents new stab
Autor:
George A. Brook, L. Bruce Railsback, Ny Riavo G. Voarintsoa, Fuyuan Liang, Hai Cheng, R. Lawrence Edwards
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 506:139-153
A multi-proxy record of past climate from a stalagmite from Bone Cave in northwestern Botswana suggests relatively wet conditions late in the Little Ice Age and progressively drier conditions in the twentieth century. The proxies include surfaces of
Autor:
L. Bruce Railsback
Publikováno v:
Quaternary Science Reviews. 187:94-111
Growth rate of stalagmites can vary with many factors of physical environment, ecology, and karst hydrogeology, to the extent that growth rates calculated from a carefully selected set of data from 80 stalagmites from around the world vary by a facto
Autor:
Hai Cheng, R. Lawrence Edwards, Eugene Marais, Hillary R. Sletten, George A. Brook, Ben Hardt, L. Bruce Railsback, Fuyuan Liang, Ny Riavo G. Voarintsoa
Publikováno v:
Quaternary Science Reviews. 186:78-90
The climatic event between 4.2 and 3.9 ka BP known as the “4.2 ka event” is commonly considered to be a synchronous global drought that happened as one pulse. However, careful comparison of records from around the world shows that synchrony is po
Autor:
L. Bruce Railsback
Publikováno v:
Weather, Climate, and Society. 9:455-469
Two of the great questions of human history and economics are why some nations held far-flung empires and why some presently enjoy great wealth. One factor that should be included in the inevitably multifactorial answer to these questions is regular
Autor:
Hai Cheng, R. Lawrence Edwards, Ny Riavo G. Voarintsoa, Lixin Wang, L. Bruce Railsback, George A. Brook, Fuyuan Liang
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 469:138-155
The timing and causes of paleoenvironmental changes in Madagascar have been debated, specifically in respect to human activity following the settlement in the late Holocene. Here we present δ18O, δ13C, layer-bounding surfaces, layer-specific width,