A 27-kyr record of environmental change in central Asia inferred from the sediment record of Lake Hovsgol, northwest Mongolia

Murakami, Takahiro; Katsuta, Nagayoshi; Yamamoto, Koshi; Takamatsu, Nobuki; Takano, Masao; Oda, Tomoyuki; Matsumoto, Genki I.; Horiuchi, Kazuho; Kawai, Takayoshi

doi:10.1007/s10933-009-9336-5

Cited by 29 publications

(26 citation statements)

References 45 publications

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“…130°E 120°E 100°E 110°E 90°E 80°E 70°E 20°N 30°N 40°N 50°N 130°E 120°E 100°E 110°E 90°E 80°E 70°E 20°N 30°N 40°N 50°N 130°E 120°E 100°E 110°E 90°E 80°E 70°E 20°N 30°N 40°N 50°N 130°E 120°E 100°E 110°E 90°E 80°E 70°E 20°N 30°N 40°N 50°N 130°E 120°E 100°E 110°E 90°E 80°E 70°E 20°N 30°N 40°N 50°N 130°E 120°E 100°E 110°E 90°E 80°E Whilst maximum moisture conditions are concentrated in southwest China, records from Mongolia, Inner Mongolia and Xinjiang indicate moderately dry conditions consistent with a period of low lake levels observed by Chen et al (2008). However, newly published climatic data from two Mongolian lakes, Hoton Nur (Rudaya et al, 2009) and Lake Hovsgol (Murakami et al, 2009), imply that the early Holocene was characterised by a moisture optimum which is probably indicative of strong spatial differences in the moisture history of Mongolia during the early Holocene.…”

Section: Spatial and Temporal Climate Patterns In Monsoonal Central Amentioning

confidence: 99%

Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Wang

Liu

Herzschuh

2010

Earth-Science Reviews

289

111

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a b s t r a c t a r t i c l e i n f oThe numerical meta-analysis of 92 proxy records (72 sites) of moisture and/or temperature change confirms earlier findings that the dominant trends of climatic evolution in monsoonal central Asia since the Last Glacial roughly parallel changes in Northern Hemisphere summer insolation, i.e. the period following the Last Glacial Maximum was characterized by dry and cold conditions until 15 cal. kyr BP, followed by a warm, wet period coincident with the Bølling/Allerød warm period and terminated by a cold, dry reversal during the Younger Dryas period. After an abrupt increase at the start of the Holocene, warm and wet conditions prevailed until ca. 4 cal. kyr BP when moisture levels and temperatures started to decrease. Ordination of moisture records reveals strong spatial heterogeneity in moisture evolution during the last 10 cal. kyr. The Indian Summer Monsoon (ISM) areas (northern India, Tibetan Plateau and southwest China) exhibit maximum wet conditions during the early Holocene, while many records from the area of the East Asian Summer Monsoon indicate relatively dry conditions, especially in north-central China where the maximum moisture levels occurred during the mid-Holocene. We assign such phenomena to strengthened Hadley Circulation centered over the Tibetan Plateau during the early Holocene which resulted in subsidence in the East Asian monsoonal regions leading to relatively dry conditions. Our observations of the asynchronous nature of the two Asian monsoon subsystems on millennial time scales have also been observed on annual time-scales as well as implied through the spatial analysis of vertical air motion patterns after strong ascending airflows over the Tibetan Plateau area that were calculated from NCEP/NCAR reanalysis data for the last 30 years. Analogous with the early Holocene, the enhancement of the ISM in a 'future warming world' will result in an increase in the asynchronous nature of the monsoon subsystems; this trend is already observed in the meteorological data from the last 15 years.

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Section: Spatial and Temporal Climate Patterns In Monsoonal Central Amentioning

confidence: 99%

Asynchronous evolution of the Indian and East Asian Summer Monsoon indicated by Holocene moisture patterns in monsoonal central Asia

Wang

Liu

Herzschuh

2010

Earth-Science Reviews

289

111

View full text Add to dashboard Cite

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“…Manganese, Fe, and As of group 3 are elements sensitive to redox condition in the sediment. Existences of these three elements were indentified also in core X106 (Murakami et al 2010). According to the study, the Mn in the core showed irregular distributions from the last glacial/Holocene transition to the Holocene section.…”

Section: Sr μ-Xrf Mappingmentioning

confidence: 96%

“…5c and f). Based on the distributions and assemblages of the elements, group 1 is recognized to be elements composed of rock-forming minerals in the bedrock of the Hovsgol basin (Murakami et al, 2010). The group 1 is therefore terrigenous elements, which were supplied from the drainage basin by erosion and weathering processes.…”

Section: Sr μ-Xrf Mappingmentioning

confidence: 99%

“…Oscillations in the climate proxy data acquired by stack of elements hosted in the carbonates and organic matter have been found to coincide with abrupt climate shifts in the Holocene and the last glacial/Holocene transition observed in the North Atlantic region (Fedotov et al, 2004a). Periodic variations in the 21 chemical elements in the bulk-sediment suggested that moisture change in central Asia occurred on glacialinterglacial scales, as well as with a period of ~8.7 kyr, through the last glacial/Holocene (Murakami et al, 2010). Phedorin et al (2008) analyzed the past 1 Myr geochemical records of sediments from the two great Asian lakes (Hovsgol for Ti/Ca and Br; Baikal for diatoms and Br) with a synchrotron radiation (SR) induced μ-XRF line-scanning technique, and then found a 300-500 kyr long cycle, possibly associated with Earth's orbital eccentricity.…”

Section: Introductionmentioning

confidence: 96%

“…After investigating distributions and features of the detected 11 elements, we assess the sources and natures of each element. We discuss the paleoenvironmental implications for the observed alternated pattern in the sedimentation, together with a record of the detritus input into Lake Hovsgol (Murakami et al 2010 In the present study, we used core HDP-06 which was collected at the base of the southeast slope of Lake Hovsgol, in northwest Mongolia (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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