Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Holocene Climate Change And Climate Variability In The Northeastern United States And Northwestern China
Download Holocene Climate Change And Climate Variability In The Northeastern United States And Northwestern China full books in PDF, epub, and Kindle. Read online Holocene Climate Change And Climate Variability In The Northeastern United States And Northwestern China ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Holocene Climate Change and Climate Variability in the Northeastern United States and Northwestern China by : Cheng Zhao
Download or read book Holocene Climate Change and Climate Variability in the Northeastern United States and Northwestern China written by Cheng Zhao and published by . This book was released on 2009 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holocene climate change is still poorly understood in many parts of world. Here, I present multi-proxy records from sediments at three lakes in the northeastern United States and northwestern China to investigate the nature of Holocene climate change and climate variability. Chapter 1 presents a 35-year resolution calcite delta18O record for the last 12 ka (1ka=1000 cal yr BP) from Lake Grinnell in northern New Jersey. The record suggests that the delta18O shift from a stable state to a steadily decreasing trend at 5.8 ka reflects a non-linear response of atmospheric circulation to the gradual decrease in insolation, and that a dominant frequency shift in solar forcing might have caused the shift of centennial-scale climate oscillations in amplitude and frequency. Chapter 2 provides a 2-year resolution calcite delta18O record from a freeze-core at White Lake in northern New Jersey. The delta 18O changes, together with the published paleosalinity reconstructions from Chesapeake Bay, show a dry climate at 1780-1850, a wet climate at 1850-1920, and ~20-year moisture oscillations after 1920. Regional atmospheric circulation and Atlantic Multidecadal Oscillation may control the observed moisture variations. Anthropogenic global warming could be responsible for the increased moisture variability since 1920. Chapter 3 presents high-resolution lake-level records for the last 8 ka from Hurleg Lake on the northeastern Tibetan Plateau. Consistent with the East Asian and Indian monsoon reconstructions, the data show a dry and highly variable climate from 7.8 to 1 ka and a stable and wet climate after1 ka. Six dry intervals at 7.6-7.2 ka, 6.2-5.9 ka, 5.3-4.9 ka, 4.4-3.8 ka, 2.7-2.4 ka and 1.7-1.1 ka have also been detected. Insolation, solar variations, and/or oceanic and atmospheric circulations are responsible for the monsoon changes and millennial-scale variability. Chapter 4 provides a centennial-scale lake-level record for the past 1 ka at Hurleg Lake. The opposite moisture pattern between the Qaidam Basin and surrounding mountains implies that topography could be an important factor in controlling regional moisture patterns through mediating rising and subsidence air masses in this topographically-complex region. The 200-year moisture oscillations were possibly caused by change in solar forcing.
Book Synopsis Biomarker Based Holocene Climatic Reconstruction in Northwestern China by : Yuxin He
Download or read book Biomarker Based Holocene Climatic Reconstruction in Northwestern China written by Yuxin He and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Biomarker Based Holocene Climatic Reconstruction in Northwestern China" by Yuxin, He, 何毓新, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Holocene hydrological changes in regions influenced by the mid-latitude westerly and the tropical/subtropical Asian monsoon differ from each other. The arid/semi-arid northeastern Tibetan Plateau, lying in between, is very sensitive to climatic changes. It thus becomes a climatologically important region to disentangle the interactions between the two circulations. Yet, limited high-quality Holocene paleoclimatic reconstructions are available in this region. This thesis presents multi-biomarker proxy records from lakes in the Qaidam Basin on the northeastern Tibetan Plateau to investigate the nature of Holocene climate variability. Firstly, late-Holocene paired alkenone-based temperature (U_37 DEGREESK'' ) and moisture (%C37:4) records from Lake Gahai and Lake Sugan were reconstructed. Paired temperature and moisture records confirm the warm-dry (e.g. Medieval Warm Period) and cold-wet (e.g. Little Ice Age) periods on the arid northeastern Tibetan Plateau over the late Holocene, opposite to the warm-wet and cold-dry association in Asian monsoonal regions. The records also suggest substantially warmer and drier conditions during the Medieval Warm Period than the current warm period. Further, a possible link between solar forcing and natural climate variability (both temperature and moisture) during the late Holocene is found on the northeastern Tibetan Plateau. This thesis also studied the late-Holocene grain size-based dust storm history from Lake Gahai to encode possible mechanism of dust storm interacting with hydrological parameters. Intensified dust storm events were identified in periods of 500 BC to 250 BC, 50 BC to AD 250 and AD 1100 to present. In multi-centennial to millennial scales, dust storm events might be caused by the intensified wind induced by strong westerlies or/and Asian winter monsoon. In multi-decadal to centennial scales, moisture and vegetation coverage might have impacted on the dust storm intensity and frequency. Further, Holocene lake level history of Lake Gahai was reconstructed by multiple n-alkane and alkenone proxies. Combined biomarker results provide unambiguous evidence of relatively low lake level at 7-2 ka, probably lowest at 6 ka. Considering the chronological uncertainty, Holocene lake level changes in this marginal region thus display a different pattern from either of the core regions dominated by the westerlies (anti-phase) and the Asian summer monsoon (out-of-phase). The temperature-induced evaporation in the arid marginal region could significantly affect regional hydrological balance, resulting in the discrepancy with the long-term decreasing trend in precipitation in Asian monsoon-dominated regions. Lastly, n-fatty acid δD variation from Lake Hurleg over the past 10.5 ka was investigated. The C26 δD and C16 δD values can indicate water δD changes in terrestrial and aquatic sources, respectively. The heavier C26 δD values during cold and wet conditions suggest that terrestrial water δD changes might be caused by factors other than temperature and moisture, such as glacial melted water input and vegetation type change. The difference between C16 δD and C26 δD was used as an indicator of evaporation at the lake surface. At millennial timescale, less evaporation occurred during cold-wet periods in this region. DOI: 10.5353/th_b5185924 Subjects: Paleoclimatology - China - Tsaidam Basin Paleoclimatology - Ho
Book Synopsis Climate Changes during the Holocene and their Impact on Hydrological Systems by : Arie S. Issar
Download or read book Climate Changes during the Holocene and their Impact on Hydrological Systems written by Arie S. Issar and published by Cambridge University Press. This book was released on 2004-08-05 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive review of the effects of climate variability on hydrological and human systems in the Holocene (last 10, 000 years), with a view to predicting similar effects in the future. It will be of value to researchers and professionals in hydrology, climatology, geology and historical geography.
Book Synopsis Global Change in the Holocene by : John Birks
Download or read book Global Change in the Holocene written by John Birks and published by Routledge. This book was released on 2014-02-24 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Holocene spans the 11,500 years since the end of the last Ice Age and has been a period of major global environmental change. However the rate of change has accelerated during the last hundred years, due largely to human impacts and this has led to a growing concern for the future of our environmental resources. Global Change in the Holocene demonstrates how reconstructing the record of past environmental change can provide us with essential knowledge about how our environment works and presents the reader with an informed viewpoint from which to project realistic future scenarios. The book brings together key techniques that are widely used in Holocene research, such as radiocarbon dating, dendrochronology and sediment analysis and offers a comprehensive analysis of various archives of environmental change including instrumental and documentary records, corals, lake sediments, glaciers and ice cores. This reference will be an informative and cutting-edge resource for all researchers in the fields of climate change, environmental science, geography, palaeoecology and archaeology.
Book Synopsis Holocene Climate Change and Environment by : Navnith Kumaran
Download or read book Holocene Climate Change and Environment written by Navnith Kumaran and published by Elsevier. This book was released on 2021-09-24 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. 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 organic carbon, carbon/nitrogen ratio, stable isotopes) and other physical tools from all regions of India. It also covers new facilities in chronological study and luminescence dating, which have added a new dimension toward understanding the Holocene glacial retreats evolution of coastal landforms, landscape dynamics and human evolution. Each chapter is presented with a unified structure for ease of access and application, including an introduction, geographic details, field work and sampling techniques, methods, results and discussion. This detailed examination of such an important region provides key insights in climate modeling and global prediction systems. Provides data and research from environmentally and geologically diverse regions across the Indian subcontinent Presents an integrated and interdisciplinary approach, including considerations of human impacts Features detailed case studies that include methods and data, allowing for applications related to research and global modeling
Book Synopsis Climate Changes in the Holocene: by : Eustathios Chiotis
Download or read book Climate Changes in the Holocene: written by Eustathios Chiotis and published by CRC Press. This book was released on 2018-11-15 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights climate as a complex physical, chemical, biological, and geological system, in perpetual change, under astronomical, predominantly, solar control. It has been shaped to some degree through the past glaciation cycles repeated in the last three million years. The Holocene, the current interglacial epoch which started ca. 11,700 years ago, marks the transition from the Stone Age to the unprecedented cultural evolution of our civilization. Significant climate changes have been recorded in natural archives during the Holocene, including the rapid waning of ice sheets, millennial shifting of the monsoonal fringe in the northern hemisphere, and abrupt centennial events. A typical case of severe environmental change is the greening of Sahara in the Early Holocene and the gradual desertification again since the fifth millennium before present. Climate Changes in the Holocene: Impact, Adaptation, and Resilience investigates the impact of natural climate changes on humans and civilization through case studies from various places, periods, and climates. Earth and human society are approached as a complex system, thereby emphasizing the necessity to improve adaptive capacity in view of the anthropogenic global warming and ecosystem degradation. Features: Written by distinguished experts, the book presents the fundamentals of the climate system, the unparalleled progress achieved in the last decade in the fields of intensified research for improved understanding of the carbon cycle, climate components, and their interaction. Presents the application of paleoclimatology and modeling in climate reconstruction. Examines the new era of satellite-based climate monitoring and the prospects of reduced carbon dioxide emissions.
Book Synopsis Climate Change and Cultural Dynamics by : David G. Anderson
Download or read book Climate Change and Cultural Dynamics written by David G. Anderson and published by Elsevier. This book was released on 2011-07-28 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Middle Holocene epoch (8,000 to 3,000 years ago) was a time of dramatic changes in the physical world and in human cultures. Across this span, climatic conditions changed rapidly, with cooling in the high to mid-latitudes and drying in the tropics. In many parts of the world, human groups became more complex, with early horticultural systems replaced by intensive agriculture and small-scale societies being replaced by larger, more hierarchial organizations. Climate Change and Cultural Dynamics explores the cause and effect relationship between climatic change and cultural transformations across the mid-Holocene (c. 4000 B.C.). Explores the role of climatic change on the development of society around the world Chapters detail diverse geographical regions Co-written by noted archaeologists and paleoclimatologists for non-specialists
Book Synopsis Climate Changes during the Holocene and their Impact on Hydrological Systems by : Arie S. Issar
Download or read book Climate Changes during the Holocene and their Impact on Hydrological Systems written by Arie S. Issar and published by Cambridge University Press. This book was released on 2003-06-19 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now widely accepted that increasing concentrations of greenhouse gases in the atmosphere are causing higher global temperatures. This volume provides a comprehensive review of the effects of climate variability on hydrological and human systems in the Holocene (the last 10,000 years). The book concentrates on the regions bordering the Mediterranean Sea, western and central Europe, China, Japan, West and South Africa and southwestern U.S.A. It is intended for researchers and professionals in hydrology, climatology, geology and historical geography.
Book Synopsis Holocene Climate Variability in the White Mountains of Eastern North America by : Joshua Kurek
Download or read book Holocene Climate Variability in the White Mountains of Eastern North America written by Joshua Kurek and published by . This book was released on 2003 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Climate in Historical Times by : Hubertus Fischer
Download or read book The Climate in Historical Times written by Hubertus Fischer and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on efforts by geoscientists and climate modellers (KIHZ) to assess natural climate variability during the Holocene. Part 1 is an overview of the climate system and its dynamics. Part 2 describes the efforts of the KIHZ members to reconstruct past climate by using proxy data derived from ice cores, lake sediments, tree rings and corals, statistical analyses and climate models.
Book Synopsis Holocene Climate Changes in the Asia-Pacific Region by : Liangcheng Tan
Download or read book Holocene Climate Changes in the Asia-Pacific Region written by Liangcheng Tan and published by Frontiers Media SA. This book was released on 2021-03-08 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Past Climate Variability through Europe and Africa by : Richard W. Battarbee
Download or read book Past Climate Variability through Europe and Africa written by Richard W. Battarbee and published by Springer Science & Business Media. This book was released on 2007-11-06 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on two complementary time-scales, the Holocene (approximately the last 11,500 years) and the last glacial-interglacial cycle (approximately the last 130,000 years) to synthesize evidence of climate variability at the regional and continental scale across Europe and Africa. This is the first examination of historical climate variations at such a scale, and thus sets a benchmark for future research.
Book Synopsis Climate Changes During the Holocene and Their Impact on Hydrological Systems by : Arie S. Issar
Download or read book Climate Changes During the Holocene and Their Impact on Hydrological Systems written by Arie S. Issar and published by . This book was released on 2003 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now widely accepted that increasing concentrations of greenhouse gases in the atmosphere are causing higher global atmospheric temperatures. However, there is still a great deal of uncertainty about the likely effects of such a temperature rise on climate, and even more about the impacts of climate change and variability on the world's hydrological regimes and socio-economic systems. Studying the effects of climate variability in the past can give clues as to possible future effects. This volume provides a comprehensive review of the effects of climate variability on hydrological and human systems in the Holocene (the last 10,000 years), in various parts of the world. The book concentrates on the regions bordering the Mediterranean Sea, western and central Europe, China, Japan, West and South Africa and the southwestern USA. This book will be of value to researchers and professionals in hydrology, climatology, geology and historical geography.
Book Synopsis Holocene Climate Variability by : E. Jansen
Download or read book Holocene Climate Variability written by E. Jansen and published by Elsevier Science & Technology. This book was released on 2004 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an update of results on the record of past ocean variability since the end of the ice age. This work gives an overview of many aspects of natural climate variability and give both scholars and students a means of keeping up to date on recent developments in the field.
Book Synopsis Elk Lake, Minnesota: Evidence for Rapid Climate Change in the North-Central United States by : J. Piatt Bradbury
Download or read book Elk Lake, Minnesota: Evidence for Rapid Climate Change in the North-Central United States written by J. Piatt Bradbury and published by Geological Society of America. This book was released on 1993-01-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected papers regarding conditions found in Elk Lake, Minnesota being evidence for rapid climate change in the north-central United States. Among the topics: the chronology of Elk Lake sediments, climate and limnological settings, and deposition of calcium carbonate. Annotation copyright Book News
Book Synopsis Patterns of Mid-Holocene Climate Change by : Gunnar Mallon
Download or read book Patterns of Mid-Holocene Climate Change written by Gunnar Mallon and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With growing concerns over future climate change, the need to understand past climate variability has become an important topic of research. In this thesis, a gap in knowledge of the transition to modern climatic conditions during the mid-Holocene is identified and addressed. Mid-Holocene atmospheric moisture availability has been reconstructed from five raised mires (Kortlandamossen, Tore Hill Moss, Raeburn Flow, Gällseredsmossen, and Misten Bog) located on geographical and climatological gradients across northwest Europe. In this thesis, a new testate amoebae-based palaeohydrological transfer function for south-central Sweden and an improved indicator-weighted Hydroclimatic Index (HCI) were created in order to establish univariate measures of mid-Holocene bog surface wetness (BSW). Together with detrended correspondence analysis, the HCI and testate amoebae transfer function were applied to palaeoecological data from the five bogs, in order to reconstruct climatic variability across northwest Europe from c. 9000 before present (BP) until c. 3500 BP. A series of wet and dry excursions of the bog surfaces were identified on all five bogs. These BSW changes were compared with palaeoclimatic evidence from the wider literature on a local, regional, continental and hemispheric scale. Throughout the early- to mid-Holocene, increased BSW on Misten Bog closely coincided with episodes of reduced SST in the North Atlantic. A similar link was established between SST and BSW on Raeburn Flow and Gällseredsmossen, following the end of the Holocene Thermal Maximum (HTM). The results from the analysis demonstrate that the HTM occurred asynchronously across northwest Europe. Reconstructions from all five bogs, except Misten Bog, showed a prolonged dry phase on the bog surface starting prior to c. 7000 BP. The end of the HTM occurred between c. 5600 BP and c. 4800 BP on all sites except Kortlandamossen, where regional environmental mechanisms delayed the end of the HTM. A climatic boundary at the end of the HTM was detected around 57oN, with sites south of 57oN experiencing the termination between c. 5600 BP and c. 5300, while it occurred between c. 4800 BP and c. 4400 BP on the sites north of this latitude. The only period when all five sites displayed similar BSW changes was between c. 4400 BP and c. 4000 BP, a period of global climatic change. A major wetting on the bogs during this time coincided with increased BSW and glacial advances across Europe as well as high lake levels in France and Switzerland.
Book Synopsis Trends in Wintertime Climate Variability in the Northeastern United States by : Elizabeth Ann Burakowski
Download or read book Trends in Wintertime Climate Variability in the Northeastern United States written by Elizabeth Ann Burakowski and published by . This book was released on 2007 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
