نتایج جستجو برای: holocene
تعداد نتایج: 8437 فیلتر نتایج به سال:
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...
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...
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...
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 ...
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 ...
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...
•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...
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...
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...
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...
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