Holocene summer temperature in arid central Asia linked to millennial-scale North Atlantic climate events and driven by centennial-scale solar activity

2020 ◽  
Vol 556 ◽  
pp. 109880
Author(s):  
Chao Huang ◽  
Zhiguo Rao ◽  
Yunxia Li ◽  
Wen Yang ◽  
Lidan Liu ◽  
...  
Keyword(s):  
Solar Activity ◽  
Central Asia ◽  
North Atlantic ◽  
Summer Temperature ◽  
Arid Central Asia ◽  
North Atlantic Climate ◽  
Climate Events ◽  
Millennial Scale

Solar activity and the westerlies dominate decadal hydroclimatic changes over arid Central Asia

2019 ◽  
Vol 173 ◽  
pp. 53-60 ◽  
Author(s):  
Dongna Yan ◽  
Hai Xu ◽  
Jianghu Lan ◽  
Kangen Zhou ◽  
Yuanda Ye ◽  
...  
Keyword(s):  
Solar Activity ◽  
Central Asia ◽  
Arid Central Asia

Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia

2020 ◽  
Vol 55 (5-6) ◽  
pp. 1187-1208 ◽  
Author(s):  
Jianyong Li ◽  
Ninglian Wang ◽  
John Dodson ◽  
Hong Yan ◽  
Xiaojian Zhang ◽  
...  
Keyword(s):  
Central Asia ◽  
Summer Temperature ◽  
Arid Central Asia ◽  
Moisture Availability ◽  
Negative Coupling

Late Quaternary lake-level and climate changes in arid central Asia inferred from sediments of Ebinur Lake, Xinjiang, northwestern China

2019 ◽  
Vol 92 (2) ◽  
pp. 416-429 ◽  
Author(s):  
Jianchao Zhou ◽  
Jinglu Wu ◽  
Long Ma ◽  
Mingrui Qiang
Keyword(s):  
Grain Size ◽  
Central Asia ◽  
North Atlantic ◽  
Lake Level ◽  
Climate Changes ◽  
Late Quaternary ◽  
Study Region ◽  
Climate Conditions ◽  
Arid Central Asia ◽  
Ebinur Lake

AbstractArid central Asia plays an important role in global climate dynamics, but large uncertainties remain in our understanding of the region's hydroclimate variability during the Late Quaternary. Here we present a new, high-resolution record of lacustrine sediment grain-size and element chemistry from Ebinur Lake, which was used to infer lake conditions and related climate changes in the study region between ca. 39.2 and 3.6 ka. End-member modeling analysis of grain-size data and PCA of elemental data show that lake level fluctuated dramatically from 39.2 to 34.0 ka. Subsequently, Ebinur Lake experienced a high stand from 34.0 to 28.0 ka, under humid climate conditions. The subsequent period, from 28.0 to 12.0 ka, was characterized by lake regression under dry climate conditions, whereas afterward (12.0–3.6 ka), considerably higher lake levels and humid conditions again prevailed. Millennial-scale abrupt climate changes, such as Heinrich events (H3 and H1) and the Younger Dryas, which are documented in the North Atlantic region, are also detected in the sediment record from Ebinur Lake. Comparisons with other sediment records from arid central Asia generally support the claim that climate change in this region was influenced mainly by variations in North Atlantic sea surface temperatures, through the westerlies.

scholarly journals Correlation of Late-Pleistocene Lake-Level Oscillations in Mono Lake, California, with North Atlantic Climate Events

1998 ◽  
Vol 49 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Larry V. Benson ◽  
Steve P. Lund ◽  
James W. Burdett ◽  
Michaele Kashgarian ◽  
Timothy P. Rose ◽  
...  
Keyword(s):  
North Atlantic ◽  
Inorganic Carbon ◽  
Mono Lake ◽  
Total Inorganic Carbon ◽  
Lake Levels ◽  
Owens Lake ◽  
North Atlantic Climate ◽  
The Mean ◽  
Climate Events ◽  
Wilson Creek Formation

Oxygen-18 (18O) values of sediment from the Wilson Creek Formation, Mono Basin, California, indicate three scales of temporal variation (Dansgaard–Oeschger, Heinrich, and Milankovitch) in the hydrologic balance of Mono Lake between 35,400 and 12,900 14C yr B.P. During this interval, Mono Lake experienced four lowstands each lasting from 1000 to 2000 yr. The youngest lowstand, which occurred between 15,500 and 14,000 14C yr B.P., was nearly synchronous with a desiccation of Owens Lake, California. Paleomagnetic secular variation (PSV) data indicate that three of four persistent lowstands occurred at the same times as Heinrich events H1, H2, and H4.18O data indicate the two highest lake levels occurred ∼18,000 and ∼13,100 14C yr B.P., corresponding to passages of the mean position of the polar jet stream over the Mono Basin. Extremely low values of total inorganic carbon between 26,000 and 14,000 14C yr B.P. indicate glacial activity, corresponding to a time when summer insolation was much reduced.

Combined Marine Proxy and Pollen Analyses Reveal Rapid Iberian Vegetation Response to North Atlantic Millennial-Scale Climate Oscillations

2001 ◽  
Vol 56 (1) ◽  
pp. 128-132 ◽  
Author(s):  
Katherine H. Roucoux ◽  
Nicholas J. Shackleton ◽  
Lucia de Abreu ◽  
Joachim Schönfeld ◽  
Polychronis C. Tzedakis
Keyword(s):  
North Atlantic ◽  
Phase Relationship ◽  
Deep Sea Sediment ◽  
Climatic Oscillations ◽  
The North ◽  
Tree Population ◽  
North Atlantic Climate ◽  
First Time ◽  
Millennial Scale

AbstractA deep-sea sediment core from the western Portuguese margin has provided a continuous, high-resolution record of millennial-scale climatic oscillations during the interval 9000–65,000 yr B.P. Pollen analysis of the same sequence allows direct, in situ assessment of the phase relationship between the North Atlantic climate system and vegetation changes on the adjacent landmass. This demonstrates for the first time that variability in NW Iberian tree population size closely tracked millennial-scale climate variability.

scholarly journals Holocene Solar Activity Imprint on Centennial‐ to Multidecadal‐Scale Hydroclimatic Oscillations in Arid Central Asia

2019 ◽  
Vol 124 (5) ◽  
pp. 2562-2573 ◽  
Author(s):  
Xiaokang Liu ◽  
Zhiguo Rao ◽  
Chuan‐Chou Shen ◽  
Jianbao Liu ◽  
Jianhui Chen ◽  
...  
Keyword(s):  
Solar Activity ◽  
Central Asia ◽  
Arid Central Asia

scholarly journals Revisiting the absolute calibration of the Greenland ice-core age-scales

2008 ◽  
Vol 4 (3) ◽  
pp. 791-807 ◽  
Author(s):  
L. Skinner
Keyword(s):  
North Atlantic ◽  
Ice Core ◽  
Ice Cores ◽  
Absolute Calibration ◽  
North Atlantic Climate ◽  
The Absolute ◽  
Absolute Age ◽  
Surface Reservoir ◽  
Climate Events ◽  
Age Constraints

Abstract. Recently, an absolute "calibration" was proposed for the GRIP and GISP2 Greenland ice-core time scales (Shackleton et al., 2004). This calibration attempted to reconcile the stratigraphic integration of ice-core, marine and speleothem archives with the absolute age constraints that marine and speleothem records incorporate. Here we revisit this calibration in light of the new layer-counted chronology of the NGRIP ice-core (GICC05). The GICC05 age-scale differs from the proposed absolute calibration by up to 1200 years late in the last glaciation, with implications both for radiocarbon cycling and the inferred timing of North Atlantic climate events relative to absolutely dated archives (e.g. relative sea-level). By precisely aligning the stratigraphy of Iberian Margin marine cores with that of the Greenland ice-cores, it appears that either: 1) the radiocarbon content of mid-latitude Atlantic surface-waters was extremely depleted (resulting in average surface reservoir ages up to 1700 years prior to ~22 ka BP); or 2) the GICC05 age-scale includes too few years (is up to 1200 years too young). It is shown here that both of these possibilities are in fact correct to some degree. Northeast Atlantic surface reservoir ages should be revised upward by ~350 years, while the NGRIP age-scale appears to be "missing" time. These findings illustrate the importance of integrated stratigraphy as a test for our chronologies, which are rarely truly "absolute". This is an important point, since probably the worst error that we can make is to entrench and generalise a precise stratigraphical relationship on the basis of erroneous absolute age assignations.

scholarly journals Revisiting the absolute calibration of the Greenland ice-core age-scales*

2008 ◽  
Vol 4 (4) ◽  
pp. 295-302 ◽  
Author(s):  
L. C. Skinner
Keyword(s):  
North Atlantic ◽  
Ice Core ◽  
Ice Cores ◽  
Absolute Calibration ◽  
North Atlantic Climate ◽  
The Absolute ◽  
Absolute Age ◽  
Surface Reservoir ◽  
Climate Events ◽  
Age Constraints

Abstract. Recently, an absolute "calibration" was proposed for the GRIP and GISP2 Greenland ice-core time scales (Shackleton et al., 2004). This calibration attempted to reconcile the stratigraphic integration of ice-core, marine and speleothem archives with the absolute age constraints that marine and speleothem records incorporate. Here we revisit this calibration in light of the new layer-counted chronology of the NGRIP ice-core (GICC05). The GICC05 age-scale differs from the proposed absolute calibration by up to 1200 years late in the last glaciation, with implications both for radiocarbon cycling and the inferred timing of North Atlantic climate events relative to radiometrically dated archives (e.g. relative sea-level). By aligning the stratigraphy of Iberian Margin marine cores with that of the Greenland ice-cores, it can be shown that either: 1) the radiocarbon content of mid-latitude Atlantic surface-waters was extremely depleted (resulting in average surface reservoir ages up to 1700 years prior to ~22 ka BP); or 2) the GICC05 age-scale includes too few years (is up to 1200 years too young). It is shown here that both of these possibilities are probably correct to some degree. Based on the assumed accuracy of coral and speleothem U-Th ages, Northeast Atlantic surface reservoir ages should be revised upward by ~350 years, while the NGRIP age-scale appears to be "missing" time. These findings illustrate the utility of integrated stratigraphy as a test for our chronologies, which are rarely truly "absolute". This is an important point, since probably the worst error that we can make is to entrench and generalise a precise stratigraphical relationship on the basis of erroneous absolute age assignations.

Four peat humification-recorded Holocene hydroclimate changes in the southern Altai Mountains of China

The Holocene ◽  
2021 ◽  
pp. 095968362110116
Author(s):  
Dongliang Zhang ◽  
Liang Chen ◽  
Zhaodong Feng ◽  
Min Ran ◽  
Yunpeng Yang ◽  
...  
Keyword(s):  
Central Asia ◽  
North Atlantic ◽  
Late Holocene ◽  
Sea Surface ◽  
Altai Mountains ◽  
Time Dependency ◽  
The North ◽  
Lower Temperature ◽  
Species Specific ◽  
Millennial Scale

In this study, Holocene humification records were derived from four ombrotrophic peatlands to investigate the millennial-scale and decadal-centennial-scale variability of peat decomposition and to explore the paleoclimatic and paleohydrological implications. After eliminating the species-specific and site-specific noise and removing the time-dependency effect for each of four peat sequences, the averaged residuals of four peat humification sequences exhibit two-order variations. The millennial-scale variation of averaged residuals of four peat humification is characterized by a bow-shaped curve and is basically moisture-dependent. In detail, the humification in the middle Holocene (~8200–~4000 cal. yr BP) was higher than in the early Holocene (before ~8200 cal. yr BP) and also than in the late Holocene (after ~4000 cal. yr BP). The decadal/centennial-scale variations are superimposed on the bow-shaped curve and have been primarily paced by the sea surface temperature in the North Atlantic whose signals were propagated to Central Asia via the prevailing westerlies, which implies that lower temperature and lower temperature-suppressed evaporation (i.e. elevated moisture level) were most likely responsible for limiting the decomposition activity in the uppermost peat layer. These results indicate the potential for humification records from ombrotrophic peatlands in Central Asia to elucidate paleoclimate variability.

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