Climate Changes During The Holocene And Their Impact On Hydrological Systems

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Quaternary Science Reviews - Columbia University

During the last glacial e Holocene climatic cycles, the Levant region underwent significant changes in the amount and, possibly, pattern of precipitation over a wide range of time scales, from decadal to millennial. These changes were reflected in the regional hydrological systems, particularly in the supply of riverine runoff

1 Climate changes in the Levant during the Late Quaternary Period

1 Climate changes in the Levant during the Late Quaternary Period Ataratherearlystageoftheresearchtobereportedinthisbook, it was decided to use the connections

COMMENTARY Climate change and California drought in the 21st

logical and hydrological phenomena around the world, from heat waves to coastal dam-ages during extreme tides and storms, flood-ing from more intense precipitation events, and severe drought (1). In a new study pub-lished in PNAS, Diffenbaugh et al. now add weight to the accumulating evidence that anthropogenic climatic changes are already

Tracking Holocene Climatic Change with Aquatic Biota from

can be complex, even in apparently simple aquatic systems (e.g., Anderson et al. 2008; Fritz 2008). In this chapter, we provide an overview of the different numerical techniques that have been used to study the linkages between changes in biotic assemblages preserved in lake sediments and climatic change during the Holocene. It is im-

Chapter 17 Impact of Climate Change on the Aral Sea and Its Basin

climate change and variability that occur at multiple temporal and spatial scales. Climate, land-use, and hydrology are interconnected in complex ways. Any change in one of these systems induces a change in the other. For example, basin-wide hydrological and land cover changes have caused changes in temperature patterns

Impact of a Drier Early-Mid-Holocene Climate upon Amazonian

Understanding the direction and magnitude of climate change in Amazonia over the twenty-first century, and its impact upon Amazonian forests, constitutes a major international research effort that reflects the global importance of the Amazon forest biome and its associated climatic and hydrological systems (e.g. Malhi & Phillips 2004).

An evolutionary model for the Holocene formation of the Pearl

during the middle and late Holocene has led to the formation of regressive deltaic systems. Since sea level reached an altitude close to present height about 7000 years ago, fluvial and coastal processes have become important controlling factors in the evolu - tionary history of deltas (Woodroffe, 2000; Chen et al., 2007).

Coherent late-Holocene climate-driven shifts in the structure

during the cool season (September May). The unstable mean flow extending from the AL generates transient storm systems, which are carried across North America along the axis of the westerly jet core or the prevailing storm track (Rodionov et al., 2007; Wise, 2012). On decadal and longer time scales, the inten-

Peatlands and Their Role in the Global Carbon Cycle

rates have been highly variable during the Holocene (the past 12,000 years) and that peak C accumulation rates occurred dur-ing warmer climate intervals. This raises the possibility that northern peatlands, or at least significant portions of them, may serve as a negative feedback to climate change in the future, causing a cooling effect if hydro-

Holocene environmental changes in the highlands of the

ings show that hydrological fluctuations, triggered by the changing intensity of the monsoonal tropical summer rains emerging from the Amazon Basin in the north-east, have con-trolled the climate in the study area. 1 Introduction There is clear evidence that marked, global-scale climatic changes during the Holocene induced significant and com-

Quaternary Science Reviews

Such climate episodes, marked by negative excursions in the Shatuca d18O record were logged at 9.7e9.5, 9.2, 8.4, 8.1, 5.0, 4.1, 3.5, 3.0, 2.5, 2.1 and 1.5 ka b2k, and related to abrupt multi-decadal events in the SASM. Some of these events were likelyassociated with changes in sea surface temperatures (SST) during Bond events in the North Atlantic

Climate change and emerging infectious diseases

rapid climate change events and changes in the ocean thermohaline circulation (Paul Meyewski, UNH, personal communication). Together, warming and more extreme weather have begun to alter marine life and the weather patterns that impact infectious diseases, their vectors and hosts. 2. Climate and infectious disease Climate is a key determinant

Earth and Planetary Science - gatech.edu

During Marine Isotope Stage (MIS) 5a c (70 100 kyBP) and the Holocene (0 10 kyBP), when precessional forcing is moderately strong, Mulu. 18. stalagmite. δ. O minima align with equatorial boreal fall insolation strength maxima (Carolin et al., 2013). The extent of the influence of glacial boundary conditions rela-

Holocene ENSO-related cyclic storms recorded by magnetic

critical for understanding regional hydrological changes and test-ing the potential mechanisms that may influence them. Despite their high temporal resolution, speleothems remain an underused tool for assessing regional storm and flood frequency throughout the Holocene, and may offer unique insights into the long-term

THE ROLE OF ENVIRONMENTAL CHANGE IN THE DEVELOPMENT OF

precipitation impact different regions in different ways as seen by shifts in hydrological patterns, vegetation, land-forms and soil-forming processes among other factors. In the same way that human responses to environmental change are unique to specific cultural entities, the impacts of climate changes are different depending upon the envi-

Climate Change and the Water Crisis in Israel

climate change for the Middle Eastern countries that surround Lebanon. Water budget and soil moisture are used as indicators of temperature and precipitation changes. Their research also predicted that there would be an increase in CO. 2. concentrations of 1% per year. The water

Science of the Total Environment

studies also showed that during the Late Holocene, climate has been largely subordinate to human impact as main controller of long-term shifts in sediment loads, though the evidence for intense impacts from short-term climatic phases is also abundant. Small basins are most responsive to external impacts and will show the largest changes in

Climate Monitoring in Glacier Bay National Park and Preserve

future global changes in climate will impact the environment and ecosystems of Glacier Bay. Knowledge of the likely short- and long-term responses will be important in the future for utilizing and protecting Park resources while accommodating visitors. The complexity of the climate system in the Park is evident in the data which are now

ndl.ethernet.edu.et

Dynamic Programming Based Operation of Reservoirs Applicability and Limits Dynamic programming is a method of solving multi-stage problems in which decisions at one stage become t

Probabilistic Projections of Anthropogenic Climate Change

of recent climate, particularly at continental and larger scales (Randall et al. 2007), GCMs cannot adequately resolve many important processes needed to capture regional climate changes, such as convective and to-pographically forced precipitation. Yet capturing such details is crucial for climate change impact studies at

SAP 3.4: Abrupt Climate Change

SAP 3.4: Abrupt Climate Change likelihood of severe and persistent drought there in the future. If the model results are correct then this drying may have already begun, but currently cannot be

IPCC FAR - Intergovernmental Panel on Climate Change

2 Climate scenarios 4-1 3 Some physical aspects of hydrology and water resources 4-1 3.1 Methodological approaches 4-1 3.2 Changes in annual and seasonal conditions 4-2 3.3 Water demand 4-3 3.4 Water balance and lake levels 4-4 3.5 Other hydrologic characteristics 4-4 4 Hydrologic and water resource changes in large regions and countries 4-5

1 Impact of climate change on the ecology of the

60 2008), the shorter scale climate dynamics of this region is largely unconstrained. Notably, mid- to late 61 Holocene records of many East African lakes (e.g. Gasse, 2000; Wanner et al., 2011) suggest rapid and 62 frequent, high amplitude, climatic fluctuations at the centennial scale. These fluctuations and their

Response of arctic terrestrial ecosystems to recent climate

climate system. Climate-driven changes in the terrestrial cryosphere and hydrology such as degrading permafrost and decreasing surface albedo will have cascading effects on key regional bio-physical systems, and cause global climatic feedbacks. At the same time, these changes are affecting socio-economic systems in the north. Arctic human

Changes in lake area in response to thermokarst processes and

catchment characteristics. To anticipate landscape-scale changes in these systems, and assess their impact on hydrology, wildlife habitat, and carbon storage, field research is required to better characterize the mechanisms responsible for changes. 1. Introduction

Pr Dr Jean-Paul BRAVARD Head of the Rhone Watershed Workshop

Geneva Lake increased during the last 20 years for climatic reasons, the temperature of the French river course of the Rhône was affected by the impact of nuclear power plants. These documented changes anticipate on the changes predicted during the XXIth century and provide most interesting insights into the the future of aquatic ecosystems.

The Holocene - UQAM

Past changes in vegetation and water-table depth were obtained from plant macrofossil and testate amoeba analysis. Earliest regional peat accumulation started ~7520cal. BP, with long-term rates of C sequestration varying between 14.9 and 22.6 g/m. 2. per yr. High C sequestration rates occurred during the mid Holocene when relatively stable

Land Use and Climate Impacts on Fluvial Systems during the

Holocene terraces, their distribution and age has a long tradition in Central Europe. Based on morpho logical, lithological and pedogenetical evidences seven Holocene river terrace systems and three meander generations are proposed. A significant shift of the younger meander generation occurred during the

LOTRED-SA 3 International Symposium Climate change and human

5. Past changes in fluvial systems, floodplains and lakes. 6. Speleothem and Scleroclimatology records: linking the hemispheres 7. Past biodiversity and ecosystem processes 8. Abrupt changes and extreme events: volcanoes, tsunamis, hurricanes, neotectonics, etc. 9. Climate - Human Interactions during the late Holocene 10.

INTERNATIONAL HYDROLOGY SERIES Climate Changes during the

Climate Changes during the Holocene and their Impact on Hydrological Systems 4.1.1 Contemporary climate and hydrological regime of the Nile 81 The Levant is affected by two climate systems

during the late Holocene: analyses based on fossil diatoms

Climate warming at high latitudes during the next spite considerable progress in paleoclimatic research century is predicted to be about twice that of lower in the Arctic, knowledge about the relationships be-latitudes (Kattenberg et al. 1996). Due to the sen- tween climatic and hydrological changes and their

Persistent drought in North America: a climate modeling and

greenhouse future, but if we can understand the late Holocene hydrological history we will be in a better position to predict and understand future changes in hydrological conditions which could have important consequences for water resources, crops and rangelands. Precipitation over North America has been highly variable. In recent years most

CLIMATIC CHANGE-MEXICO - UNAM

The study of past global changes (Bradley, 1989; Moss, 1992) is particularly relevant during the last 15 millennia, when Pleistocene human groups underwent significant transformation in their hunting-gathering modes of subsistence, during the passage to the Holocene. From predatory hunting of relatively large herbivorous herds,

Predictable hydrological and ecological responses to Holocene

Climate variations in the North Atlantic region can substan-tially impact surrounding continents. Notably, the Younger Dryas chronozone was named for the ecosystem effects of abrupt changes in the region at circa (ca.) 12.9 11.7 ka (millennia before 1950 AD). Holocene variations since then, however, have been

Vegetation dynamics during the early to mid-Holocene

(1) To reconstruct the vegetation dynamics during the early to mid-Holocene transition in NW Malta compared with other regional pollen records, partic-ularly those from Sicily. (2) To attempt to disentangle the human versus climatic forcings in shaping landscape and vegetation during this transition.

Unprecedented the scope, scale and speed of human pressures

An important characteristic of the climate system during the Holocene is the tight link between the whole web of life on the planet and in the atmosphere, regulating the carbon cycle. Over the past 2.6 million years the planet s tem-perature has oscillated sharply, leading to alternat-ing warmer and colder periods. But the Holocene

Coupling dynamic models of climate and vegetation

biogeochemical, hydrological, and climate systems that support life on this planet. During the last few centuries, both the terrestrial biosphere and physical climate system have been undergoing fundamental changes in response to human activity. It is therefore of paramount importance to improve our understanding of global-scale climatic

A varve record of increased Little Ice Age rainfall

geomorphic changes and their impact on sediment delivery to the lake. The mean sediment yield throughout the c. 500-year varve record was 109.8 t km2 a−1, but several years exceeded the mean by a factor of four (Figure 2), and, in one case, by an order of magnitude (Figure 3, ad 1820). Multiple sediment cores were

ClimateChangesduringtheHoloceneandtheirImpactonHydrologicalSy

1.3 Climate changes during the Holocene in the Levant 6 1.4 Correlation between climate changes and historical events in the Levant 12 1.4.1 The Neolithic period, c 10kato c 7ka BP 12

Chapter 8 Freshwater Ecosystems and Fisheries

hydrological and ecological features of the various fresh-water ecosystems in the Arctic, including descriptions of each ACIA region, followed by a review of historical changes in freshwater systems during the Holocene.The chapter continues with a review of the effects of climate change on broad-scale hydro-ecology; aquatic ecosystem