نتایج جستجو برای: holocene

تعداد نتایج: 8437  

2004
Steven G. Driese Gail M. Ashley Zheng-Hua Li Victoria C. Hover R. Bernhart Owen

Wetland and floodplain soils in the East African Rift of Kenya provide a record of changing palaeoclimate and palaeohydrology compatible with climate records for the mid-Holocene through the late Holocene Medieval Warm Period (~AD 800–1270) and Little Ice Age (~AD 1270–1850), documented previously in nearby lacustrine sites. Soils forming from volcaniclastic source materials in both Loboi Swamp...

2008
Tim Denham Simon Haberle

A practice-based method is advanced to understand the emergence and transformation of agricultural practices in the Upper Wahgi valley during the Holocene. Conceptually, practices represent the nexus of human–environment interactions, as well as of structure–agency relationships, while methodologically, they are the visible remains – whether encountered directly through archaeology, or inferred...

2016
Peter N. Sedwick P. T. Harris L. G. Robertson G. M. McMurtry M. D. Cremer P. Robinson P. ROBINSON

Sediments from the Antarctic continental margin may provide detailed palaeoenvironmental records for Antarctic shelf waters during the late Quaternary. Here we present results from a palaeoenvironmental study of two sediment cores recovered from the continental shelf ofT Mac. Robertson Land, East Antarctica. These gravity cores were collected approximately 90 km apart from locations on the inne...

2002
Karl W. Wegmann Frank J. Pazzaglia

The ;400 km2 Clearwater River basin, located on the Pacific flank of the actively uplifting Olympic Mountains of western Washington State, contains a well-preserved flight of Holocene fluvial terraces. We have collected a large data set of numeric ages from these terraces that is used to elucidate the geomorphic, fluvial, active tectonic, and climatic processes that operate at Holocene spatial ...

2017
Calogero M. Santoro Eugenia M. Gayo Chris Carter Vivien G. Standen Victoria Castro Daniela Valenzuela Ricardo De Pol-Holz Pablo A. Marquet Claudio Latorre

Citation: Santoro CM, Gayo EM, Carter C, Standen VG, Castro V, Valenzuela D, De Pol-Holz R, Marquet PA and Latorre C (2017) Loco or no Loco? Holocene Climatic Fluctuations, Human Demography, and Community Based Management of Coastal Resources in Northern Chile. Front. Earth Sci. 5:77. doi: 10.3389/feart.2017.00077 Loco or no Loco? Holocene Climatic Fluctuations, Human Demography, and Community ...

2016
X. S. Zhang J. M. Reed J. H. Lacey A. Francke M. J. Leng Z. Levkov

Lake Ohrid (Macedonia and Albania) is a rare example of a deep, ancient Mediterranean lake and is a key site for palaeoclimate research in the northeastern Mediterranean region. This study conducts the analysis of diatoms as a proxy for Lateglacial and Holocene climate and environmental change in Lake Ohrid at a higher resolution than in previous studies. While Lake Ohrid has the potential to b...

2008
HELEN F. JAMES STORRS L. OLSON

•A new species of Hawaiian finch is described from two fossil maxillae recovered from Holocene lacustrine sediments in Makauwahi Cave, island of Kaua'i. The new species is assigned to Loxioides on the basis of characters defined in a previous study of drepanidine phylogeny. The maxilla of the new species resembles that of L. bailleui (the only other member of the genus) in its distinctly foresh...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Yonaton Goldsmith Wallace S Broecker Hai Xu Pratigya J Polissar Peter deMenocal Naomi Porat Jianghu Lan Peng Cheng Weijian Zhou Zhisheng An

We thank Liu et al. (1) for their comments on our paper (2). The first point of Liu et al. (1) is that the Lake Dali Early Holocene highstand could reflect increased winter precipitation and/or glacier melt rather than monsoon rainfall. First, modern winter precipitation contributes <10% annual precipitation (2, 3). To sustain the Early Holocene highstand solely based on winter precipitation re...

Journal: :Science 2009
Joerg M Schaefer George H Denton Michael Kaplan Aaron Putnam Robert C Finkel David J A Barrell Bjorn G Andersen Roseanne Schwartz Andrew Mackintosh Trevor Chinn Christian Schlüchter

Understanding the timings of interhemispheric climate changes during the Holocene, along with their causes, remains a major problem of climate science. Here, we present a high-resolution 10Be chronology of glacier fluctuations in New Zealand's Southern Alps over the past 7000 years, including at least five events during the last millennium. The extents of glacier advances decreased from the mid...

2003
Raymond S. Bradley

The role of several important factors that have played a role in Holocene climate change is examined. These forcing factors operate on different time-scales: lower frequency (millennial-scale) climate changes associated with orbital forcing, century-scale variability associated with solar forcing, and annualto decadal-scale variability associated with volcanic forcing. Feedbacks within the clim...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید