Liu, and L.G. Description From the 19th International Radiocarbon Conference held in Keble College, Oxford, England, April 3-7, 2006. Both its physical properties and its rate and direction of motion are . With the successful completion of deep drilling at Summit Greenland there is now a well-dated, high resolution, multi-parameter record of climate change (response and forcing) for the Northern Hemisphere that covers the last glacial cycle. Greenland ice cores, to the timing of worldwide Holocene glacier expansion, and to the periods of lake-level changes. to the present). We examined late Holocene (ca. Marine records from the northern Gulf of Mexico indicate that significant multidecadal- and century-scale variability was common during the Holocene. Holocene climate variability @article{Mayewski2004HoloceneCV, title={Holocene climate variability}, author={Paul Andrew Mayewski and Eelco E. Rohling and Jay Curt Stager and Wibj{\"o}rn Karl{\'e}n and Kirk A. Maasch and L. David Meeker and Eric A. Meyerson and Franoise Gasse and Shirley van Kreveld and Karin Holmgren and Julia A Lee-Thorp and . Proxy records from two piston cores in the Gulf of Mexico (GOM) provide a detailed (50-100 year resolution) record of climate variability over the last 14,000 years. Natural climate variability during the Holocene. Holocene climate variability. Glob. Results from a series of Goddard Institute for Space Studies (GISS) General Circulation Models (GCMs) are used to assess climate variability in the pre-anthropogenic Holocene, the interval following the end of the last glacial beginning roughly 11.5 kyr BP. . that compilation study demonstrates that the rcc between 1500 and 500 bce was characterised by glacier advances . The Holocene Climate Optimum (HCO) was a warm period that occurred in the interval roughly 9,000 to 5,000 years ago BP, with a thermal maximum around 8000 years BP. There is an increasing community focus on Holocene climate variability that is driven partly by the increasing number of quality proxy paleo-records, but also by the obvious relevance for assessing future climate change (Renssen and Osborn, 2003). Glacier response to North Atlantic climate variability during the Holocene. "Right now, we are in between major ice ages, in a period that has been called the Holocene," said Cahalan. Varved sediments from a lake near the present forest-prairie border in northwestern Minnesota provide an annual record of climate change for the last 10,400 years. It has also been known by many other names, such as Altithermal, Climatic Optimum, Holocene Megathermal, Holocene Optimum, Holocene Thermal Maximum, Hypsithermal, and Mid-Holocene . Water resources in western North America depend on winter precipitation, yet our knowledge of its sensitivity to climate change remains limited. Reliable reconstructions of global and regional climate during the Holocene (11,700 years ago to present) are vital to constraining the natural range of climate variability and testing state-of-the-art models, which seek to forecast the near- and long-term impact of anthropogenic greenhouse forcing. Greenland ice cores, indicating regionally coherent variability in the early Holocene. URI Here we present a record of late autumn through early winter air temperature and moisture source changes in East-Central Europe for the Holocene, based on stable isotopic analysis of an ice core recovered from a cave in the . In particular, we focus on the forced aspects of this variability. We synthesize existing paleoclimate proxy data and climate simulations to provide an overview of climate variability in Texas during the Holocene. Simulating the climate response to atmospheric oxygen variability in the Phanerozoic : a focus on the Holocene, Cretaceous and Permian. The variability in the Holocene climate and more recent anthropogenic impacts have driven many populations to fragmentation and isolation, and even to extinction. Robert D. McCulloch1,2*, James Blaikie3, Barbara Jacob1, Claudia A. Mansilla4, Flavia Morello5, Ricardo De Pol-Holz4, Manuel San Romn5, Eileen Tisdall3, Jimena Torres5. Evaluating the significance of Holocene submillennial delta18O variability in the Greenland ice cores is crucial for understanding how natural climate oscillations may modulate future anthropogenic . The climate throughout the Holocene has shown significant variability despite ice core records from Greenland suggesting a more stable climate following the preceding ice age. Our mission is to preserve and make this data and information available in order to understand and model environmental variability on an interannual to millennial time scale. The combined lake and ice-core data provide corroborative evidence for an intrinsically unstable Holocene climate in Greenland, including the 8200 yr B.P. Thus, the above evidence suggests that the current poleward mangrove tropicalization is a post-Industrial-Era phenomenon instead of a recurring phenomenon tied to global climate variability, and the current range and magnitude of mangrove expansion has never been observed in the geological records since the Mid- to Late-Holocene. Studies Holocene sea level change. The variability of holocene climate change: evidence from varved lake sediments. Upasana S Banerji, Physical Research Laboratory, Geosciences Division Department, Department Member. event that is currently recognized as the most pronounced Holocene climatic cooling with possible global significance. Contents Contributors vi Abbreviations, acronyms, and terminology viii 1 Holocene climate variability and global warming 1 Richard W. Battarbee 2 Holocene climate research - progress, paradigms, and problems 7 H. John B. Birks 3 The role of people in the Holocene 58 Frank Oldeld 4 Modeling the climate of the Holocene 98 Michel Crucix 5 The early to mid-Holocene thermal optimum in the . This award supports a project to collect and develop high-resolution ice core records from the Dry Valleys region of Antarctica, and provide interpretations of interannual to decadal-scale climate variability during the last 2000 years (late Holocene). These preliminary results suggest that vegetation change in the century and millennium frequency bands must be considered in the context of . Similarly, understanding the potential for future loss of winter snow pack requires a longer perspective on natural climate variability. These events evidently resulted from . Old glacial moraines, for example, document past glacier states: using the appropriate methodology, this information can be converted into an envelope of . The Great Barrier Reef (GBR) is a natural, social and economic asset synonymous with Australia; however, there are concerns regarding both the frequency and extent of modern reef decline, especially in regions within close . NCEI manages the world's largest archive of climate and paleoclimatology data. Holocene Climate Change and Environment presents detailed, diverse case studies from a range of environmental and geological regions on the Indian subcontinent which occupies the central part of the monsoon domain. Although the dramatic climate disruptions of the last glacial period have received considerable attention, relatively little has been directed toward climate variability in the Holocene (11,500 cal yr B.P. The Paleoclimatology team operates the World Data Service for Paleoclimatology and an Applied Research Service for Paleoclimatology, and . to the present). "Natural climate variability and global warming is clearly an important book, well-focused and distinctive, with fundamental things to say about Holocene science and its interface with the practical problem of global warming. 2004). High-resolution sampling paired with a robust age model (25 radiocarbon dates) allowed for the examination of both lake . to the present). an increase in O-2 content result in increased global-mean surface air temperature under conditions of a pre-industrial Holocene climate state, in agreement with idealised 1-D and 2-D . A study using data taken from fossils and ice cores finds that long-term temperature variability decreased four-fold from the Last Glacial Maximum ( LGM) around 21,000 years ago to the start of the Holocene around 11,500 years ago. Holocene climate variability - Volume 62 Issue 3. [3] Here, we seek to determine whether the long-term climate trends across the Holocene (last 11,000 yrs) and the centennial-millennial-scale climate variability within the Holocene followed tropical insolation forcing, which can produce long-term changes in ETP oceanography through changes in the frequency and intensity of ENSO [Clement et al . Holocene climate variability. It is argued that contemporaneous hunter-gatherers repeatedly changed their hunting equipment in response to changing climate and environment, not just for functional reasons but . Holocene Variability from ARCSS/GISP2 compared to other Paleo-Proxy Records. A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology; Journal Article Vertical structure, seasonal drawdown, and net community production in the Ross Sea, Antarctica; Journal Article These climate changes have often had profound effects on human cultures and societies. GISP2 Holocene 18O (proxy for temperature) (Grootes, et al., 1993) and EOF1 (composite measure of major chemistry representing atmospheric circulation) show parallel behavior . These events evidently resulted from . 2-10: Climate Variability (El Nio, La Nia) Short Summaries of Recent Research . Within this period, natural processes caused the planet to . Proxy-based indicators of past climate change show that current global climate models systematically underestimate Holocene-epoch climate variability on centennial to multi-millennial timescales . The atmosphere is a dynamic fluid that is continually in motion. A comparison is made of the Holocene records obtained from water isotope measurements along 11 ice cores from coastal and central sites in east Antarctica (Vostok, Dome B, Plateau Remote, Komsomolskaia, Dome C, Taylor Dome, Dominion Range, D47, KM105, and Law Dome) and west Antarctica (Byrd), with temporal resolution from 20 to 50 yr. In addition, pollen data from the same sediment core are used to investigate the response of the regional vegetation to changing climate. to the present). Glaciers are useful indicators of current and past climate changes, as they allow to perceive slow changes of the climate system that otherwise would be overwhelmed by short-term variability. Here, we examine a ~12,500-year record of hydroclimate variability from Lake Dendi located in the Ethiopian highlands based on a combination of plantwaxspecific hydrogen (D) and carbon (13C) isotopes. Variability of El Nio/Southern Oscillation activity at millennial timescales during the Holocene epoch. "Natural climate variability and global warming is clearly an important book, well-focused and distinctive, with fundamental things to say about Holocene science and its interface with the practical problem of global warming. climate change, periodic modification of Earth's climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth system. The climate throughout the Holocene has shown significant variability despite ice core records from Greenland suggesting a more stable climate following the preceding ice age. It is widely accepted that climate variability on time scales of 10 3 to 10 5 years is driven primarily by orbital, or so-called Milankovitch, forcing.More recently, millennial-scale climate variability has been detected in several Holocene climate proxy records, but there is little consensus about the precise timing, amplitude, or cause of these fluctuations (3-10). Global Change in the Holocene. Geomorphic parameters for developing a hydrologic model to infer Holocene climate variability, middle Snake River near Bliss, Idaho, American Geophysical Union, Fall Meeting: San . with little evidence of the abrupt millennial-scale climatic shifts that characterize glacial periods (2, 3). Long-term (millennial-scale) trends and changes are related to the transition from glacial to interglacial conditions and movement of the average position of the Intertropical Convergence Zone (ITCZ) related to orbital forcing. Mean annual sea-surface temperature (SST) during the last 1,400 years may have varied by 3C, and excursions to cold SST coincide with reductions in solar output. Based on existing high resolution proxy data the Holocene Climate Atlas (HOCLAT) provides an overview on the spatiotemporal variability of these fluctuations. 3300 yr BP to present-day) climate variability in the central Northwest Territories (Canadian Subarctic) using a diatom and sedimentological record from Danny's Lake (63.48N, 112.54W), located 40 km southwest of the modern-day treeline. This Article is brought to you for free and open access by the Arts and Sciences at W&M ScholarWorks. Forcings and boundary conditions follow the protocols established by the PMIP-2. It is an authoritative, up-to-date summary and synthesis of current knowledge in this area and is attractively . to the present). AU - Clark, Peter U. The understanding of their evolution requires long-term studies, in which pollen analysis is a key approach both for for- mulating . "Natural climate variability and global warming is clearly an important book, well-focused and distinctive, with fundamental things to say about Holocene science and its interface with the practical problem of global warming. Climate models are becoming more sophisticated in how . 2013. Although the dramatic climate disruptions of the last glacial period have received considerable attention, relatively little has been directed toward climate variability in the Holocene (11,500 cal yr B.P. Nature, 420, 162-165. This book examines Holocene events at different time intervals based on a new, high-resolution, multi-proxy records (pollen, spores, NPP, diatoms, grain size characteristics, total . PDF. Marine chemical fluxes during the Holocene were lower than during the Younger Dryas, but were still considerable enough to imply notable changes in the climate. The Holocene lithostratigraphic record from Piper Lake may be a consequence of unique limnological factors. INTRODUCTION 2001 Nov 9;294 . The ocean also . A mechanistic explanation for the multi-decadal- to century-scale Holocene cold relapses, which mainly occurred in the Atlantic-European regions, exists for only the early Holocene cooling events, which are probably the result of a collapse of the meridional overturning circulation owing to freshwater outbursts from the Laurentide ice sheet. Marine records from the northern Gulf of Mexico indicate that significant multidecadal- and century-scale variability was common during the Holocene. The project will test hypotheses related to ocean/atmosphere teleconnections (e.g., El Nino Southern Oscillation, Antarctic Oscillation) that . Climate-sensitive mineral, chemical, and biological . New research suggests it could fall as the world warms. It is an authoritative, up-to-date summary and synthesis of current knowledge in this area and is attractively . Previous studies in this region have shown that sea-level rise in the early to mid-Holocene, and markedly increased human land use during the past several centuries, altered vegetation in and around the lagoon. 9780203785027 Taylor and Francis, 2014. pp. Holocene P P | Holocene P P Manuscript Generator Search Engine Examination of 50 globally distributed paleoclimate records reveals as many as six periods . AU - Lawrence Edwards, R. N1 - Funding Information: We thank John Roth, Elizabeth Hale and Deana DeWire who facilitated our research at OCNM, and Xianfeng Wang who helped with U-Th dating. / Wade, David C.; . However, some have persisted to the present day. Urban, R. E., J. E. Cole, and J. T. Overpeck, 2000: Influence of mean climate . Evidence for previously undetected early Holocene cooling events is presented, but mid- to late-Holocene ice rafting in the North Atlantic appears to have had little impact on 6180 at this ocean margin site. and across three research divisions, focused on understanding and answering critical science questions about global climate change, water quality and . AU - Mix, Alan C. AU - Cheng, Hai. This paper investigates how former hunter-gatherers living along the southern North Sea coast in NW Europe adapted to long-term and short-term climatic and environmental changes at the beginning of the Holocene. Low-Latitude Climate Variability During the Holocene Warm Period Peter deMenocal,1* Joseph Ortiz,1 Tom Guilderson,2 Michael Sarnthein3 A faunal record of sea-surface temperature (SST) variations off West Africa documentsaseriesofabrupt,millennial-scalecoolingevents,whichpunctuated the Holocene warm period. Although the dramatic climate disruptions of the last glacial period have received considerable attention, relatively little has been directed toward climate variability in the Holocene (11,500 cal yr BP to the present). Major cool periods were ice ages, with the most recent ending about 11,000 years ago.
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