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Younger Dryas

A stadial or relatively cold period from about 12 900 to 11 600 years ago, which interrupted the warming of the Earth after the last ice age.

Younger Dryas

Younger Dryas   Reference library

Encyclopedia of Climate and Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2011

...especially at the end of the YD when the Holocene warming began. The return to warm conditions took place YOUNGER DRYAS. Figure 1. Global map of sites where Younger Dryas interval has been identified, most often in lake records . Symbols indicate whether significant cooling is indicated, some cooling or drying is indicated, or a lack of cooling is indicated. At sites designated +, an oscillation in climate corresponding to the Younger Dryas is found; at sites designated −, this oscillation has not been reported. The shaded area corresponds to the area...

Younger Dryas

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A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... Dryas A phase of reduced temperatures and glacial advance in north-west Europe between 11 000 and 10 000 years bp . There is evidence that other regions, such as the Mediterranean, Russia, and North America, also underwent climatic deterioration. During this phase, these non-glaciated areas experienced periglacial conditions. This climatic cooling has been attributed to increased precipitation , and therefore cloudiness, resulting from changes in the locations of the polar and oceanic Atlantic...

Younger Dryas

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The Oxford Companion to Global Change

Reference type:
Subject Reference
Current Version:
2009

... Dryas The Younger Dryas (YD) was a cold climatic interval between approximately 12,900 and 11,600 bp ( Alley et al., 1993 ). This pronounced and rapid cooling, identified a century ago in the Scandinavian macrofossil record, is named for the Arctic-alpine herb Dryas octopetala , whose preserved leaves and fruits were discovered in terrestrial sediments overlying sediments that contained indicators of a previously warmer climate. This climate change was the third and most extensive reversal to colder climate conditions in Europe following the general...

Younger Dryas

Younger Dryas   Reference library

Encyclopedia of Global Change

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Environmental Science, Social sciences, Environment
Length:
2,511 words
Illustration(s):
1

...Melting Rates on the Younger Dryas Event and Deep-Ocean Circulation . Nature 342 (1989), 637–642. Harvey, L. D. D. Modelling the Younger Dryas . Quaternary Science Reviews 8 (1989), 137–149. Hughen, K. , et al. Rapid Climate Changes in the Tropical Atlantic Region during the Deglaciation . Nature 380 (1996), 51–54. Kunz, M. , and R. Reanier . Paleoindians in Beringia . Science 263 (1996), 660–662. Manabe, S. , and R. J. Stouffer . Coupled Ocean–Atmosphere Model Response to Freshwater Input: Comparison to the Younger Dryas Event . ...

Younger Dryas

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A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... Dryas A stade or relatively cold period from about 12 900 to 11 600 years ago, which interrupted the warming of the Earth after the last ice age...

Younger Dryas Phase

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The Concise Oxford Dictionary of Archaeology (2 ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Archaeology, History
Length:
72 words

... Dryas Phase [Ge] A biostratigraphic subdivision of the late Devensian Stage in which sub‐Arctic conditions prevailed; the most recent of three subdivisions of the North Atlantic cold‐climatic phase known as the Dryas . Godwin 's pollen zone III corresponds with the Younger Dryas in Britain, marked by the development of tundra and park tundra. The Younger Dryas spans the period from c .9000 bc down to c .8000 bc in northern...

Younger Dryas stade

Younger Dryas stade   Reference library

The Oxford Companion to the Earth

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Earth Sciences and Geography
Length:
2,548 words
Illustration(s):
4

...the abundance of certain pollen types also indicate that the Younger Dryas in north-west Europe consisted of a moist, cold period followed by a more arid (but still cold) period. Fig. 3. Younger Dryas glacier limits: (a) in Scandinavia, (b) in Scotland. Any explanation of the Younger Dryas must account for its varying regional effects, particularly the severe cooling centred on the North Atlantic, and a less pronounced reorganization of oceanic and atmospheric circulation elsewhere. The Younger Dryas is unrelated to the periodic changes in the Earth's orbit...

Younger Dryas

Younger Dryas  

A stadial or relatively cold period from about 12 900 to 11 600 years ago, which interrupted the warming of the Earth after the last ice age.
Dryas

Dryas  

Part of the characteristic threefold late-glacial sequence of climatic change and associated deposits following the last, Devensian, ice advance and prior to the current, Flandrian, interglacial. The ...
gyre

gyre  

A circular or spiral motion of water, the term usually being applied to a semi-closed current system. A major gyre exists in each of the main ocean basins, centred at about 30° from the equator and ...
late glacial

late glacial  

A term usually applied to the time between the first rise of the temperature curve after the last minimum of the Devensian glaciation, and the very rapid rise of temperature that marks the beginning ...
pre-Boreal

pre-Boreal  

A warmer division of the Flandrian. For the rapid climate change at the Younger Dryas-Pre-Boreal transition, see Starkel (2003) Glob. & Planet. Change 35, 1.
Civilization and Environment

Civilization and Environment  

[This article examines the environmental background to human development and the impact of human populations on the natural world, especially the effects of early farming and commodity ...
Holocene In the Sahara

Holocene In the Sahara  

[This case study describes the tremendous climatic and environmental changes, relative to the present, undergone in northern Africa during the last 2°C increase in global temperature.] The tropical ...
dating methods

dating methods  

During the last century geologists constructed a relative time-scale based on correlation of palaeontological and stratigraphic data. Depositional rates of sediments have also been employed as a ...
climate models

climate models  

Reference type:
Overview Page
A simulation of how the climate system works, usually using large and complex computer programs that are based on mathematical equations derived from knowledge of the physics that governs the ...
paleoclimate

paleoclimate  

The climate of a particular period in the geological past, before historical records or instrumental observations. Palaeoclimatology uses evidence from glaciers and ice sheets, geology, sediments, ...
glaciation

glaciation  

1 The process by which supercooled water droplets change into ice crystals in the top of a cumulonimbus cloud as it reaches the calvus stage. The cloud may subsequently develop capillatus features or ...
lake

lake  

A body of (usually fresh) water that is entirely or nearly entirely surrounded by land.
Arctic

Arctic  

The area lying above 66.5° North that is dominated by the Arctic Ocean but also includes large land areas in Canada, Russia, Greenland, Scandinavia, Iceland, and Alaska. Some of the land areas, ...

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