Trend of increasing Holocene summer precipitation in arid central Asia: Evidence from an organic carbon isotopic record from the LJW10 loess section in Xinjiang, NW China

Xie, Haichao; Zhang, Huiwen; Ma, Jing; Li, Guoqiang; Wang, Qiang; Rao, Zhiguo; Huang, Wei; Huang, Xiaozhong; Chen, Fahu

doi:10.1016/j.palaeo.2018.04.006

Cited by 46 publications

(36 citation statements)

References 74 publications

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“…Photograph, stratigraphy, and chronology of six loess‐paleosol sequences from mid‐latitude Asia. (a) Yellibadragh (YE; from NE Iran, this study; the red dashed line represents the reconstructed MAP with uncertainties), (b) VA (from Kazakhstan; Ran & Feng et al, 2014), and (c) LJW10 (from northern Xinjiang; Li et al, ; Xie et al, ) are from arid central Asia (ACA); (d) Lantian (LT), (e) Xingyang (XY) (Yang et al, ), and (f) Yaoxian (YX) (Xia et al, ) are from the Chinese Loess Plateau in monsoonal Asia. The blue dashed lines denote the boundary of Holocene paleosol layers.…”

Section: Discussionmentioning

confidence: 88%

“…(e) Standardized moisture index based on loess records from Tajikistan and Xinjiang (Gao et al, ). (f) δ 13 C org ‐based quantitative reconstruction of summer precipitation for the LJW10 profile, northern Xinjiang (Xie et al, ). (g and h) Simplified moisture evolution patterns in the core area of the westerly‐dominated climatic regime (WDCR) and the East Asian summer monsoon (EASM)‐dominated region (Chen et al, , 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Wang et al () considered that this effect to be minor in grasslands but that it should be considered in forest soils. (3) Because of differences in vegetation, climate, and geomorphological conditions between northern China and NE Iran, using 1‰ as the “systematically positive excursion” value may introduce uncertainties (Melillo et al, ; Wang et al, ; Wang, Wang, et al, 2019; Xie et al, ; Yang et al, ). (4) The correction of the use of the coefficient of −0.02‰/ppm for the effect of atmospheric CO 2 concentration may also involve uncertainties (Liu, Zhang, et al, ; Polley et al, ; Wang et al, ; Yang et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…We also compared the stratigraphic features of the loess‐paleosol sequences of YE (Figure a), VA (Figure b; Ran & Feng, ), and LJW10 (Figure c; Li et al, ; Xie et al, ), from ACA, with those of Lantian (LT) (Figure d; Yang et al, ), Xingyang (XY) (Figure e; Yang et al, ), and Yaoxian (YX) (Figure f; Xia et al, ), in monsoonal Asia. The sections from ACA exhibit gradually increasing pedogenic intensity since the mid‐Holocene, and in monsoonal Asia, loess layers were deposited in the early and late Holocene, with paleosol layers developing during the mid‐Holocene.…”

Section: Discussionmentioning

confidence: 99%

“…To correct for the atmospheric CO 2 concentration, we used the coefficient of −0.02 ‰/ppm (Feng & Epstein, ), which is the most commonly used value in studies of the δ 13 C org of loess (Hatté, Antoine, et al, ; Wang et al, , Wang, Li, et al, , Wang, Wang, et al, 2019). Because the carbon isotopic composition of organic matter becomes more positive after long‐term decomposition, we used 1‰ as the systematic excursion value (Melillo et al, ; Rao et al, ; Wang et al, ; Wang, Wang, et al, 2019; Xie et al, ). Based on the results of linear regression analysis between MAP and the δ 13 C org values of the 44 surface soil samples in NE Iran and the abovementioned corrections (Wang, Wang, et al, 2019), our equation for MAP reconstruction is defined as MAP (mm) = −((δ 13 C org‐corrected − 1) + 22.8418)/0.0079.…”

Section: Sampling and Methodsmentioning

confidence: 99%

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Holocene Moisture Variations in Western Arid Central Asia Inferred From Loess Records From NE Iran

Wang

Wei

Khormali

et al. 2020

Geochem Geophys Geosyst

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Holocene variations in precipitation in central and eastern arid central Asia (ACA) have been widely investigated, but the pattern in western ACA remains unclear. We present records of the stable carbon isotope composition of bulk organic matter (δ13Corg), magnetic parameters, and sediment color, from five loess‐paleosol sequences in NE Iran, in western ACA, with the aim of reconstructing Holocene precipitation. The Yellibadragh (YE) section (the thickest among the five sequences) was selected for optically stimulated luminescence (OSL) dating of the coarse‐grained quartz (63–90 μm) fraction, and its δ13Corg record was used to quantitatively reconstruct mean annual precipitation (MAP). The record indicates a dry early Holocene (~11.8–7.4 ka), with nearly constant MAP (~93 mm), followed by a wetting trend from the mid‐Holocene (~7.4 ka) onward, with the wettest period in the late Holocene (~4.0–0.0 ka, ~390 mm). The stratigraphic observations and environmental proxies support the reconstruction. The other loess profiles show stratigraphic features and trends of environmental proxies, which are similar to those of the YE profile. A dry early Holocene and wetting trend since the mid‐Holocene, with the wettest climate in the late Holocene in NE Iran, are both consistent with records from sand dunes and lake sediments from adjacent areas, and with loess records from central and eastern ACA. Comparison with loess records from monsoonal Asia supports the interpretation of a “westerly‐dominated climatic regime,” which was proposed mainly on the basis of lake sediment records from the region. Changes in solar insolation may have been responsible for the persistent wetting trend during the Holocene in western ACA.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Sampling and Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Holocene Moisture Variations in Western Arid Central Asia Inferred From Loess Records From NE Iran

Wang

Wei

Khormali

et al. 2020

Geochem Geophys Geosyst

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Consistent long‐term Holocene warming trend at different elevations in the Altai Mountains in arid central Asia

Rao

Guo

Cao

et al. 2020

J Quaternary Science

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Recent results indicate contrasting Holocene moisture histories at different elevations in arid central Asia (ACA). However, relatively little is known about Holocene temperature changes at different elevations. Here we report an independently dated peat brGDGTs-based MBT' 5ME record from the Narenxia peatland (NRX) in the southern Altai Mountains. The record suggests a long-term warming trend since~7.7 cal. kyr BP, with a warmer stage during~7-5.5 cal. kyr BP, a cold stage during~5.5-4 cal. kyr BP, and a warming trend over the last~4 kyr. The longterm warming trend indicated by the NRX MBT' 5ME record is largely consistent with Holocene temperature records from nearby sites covering an altitudinal range of~1700-4100 m above sea level. This consistent long-term warming trend at different elevations differs from the long-term Holocene drying/wetting trends at high/low elevations of the Altai Mountains. We propose that the warming trend and consequent permafrost thawing at high elevations could have resulted in increased meltwater runoff, which would have contributed to the long-term wetting trend at low elevations. Our findings potentially provide an improved understanding of regional climate change and associated water resource availability, with implications for their possible future status.

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Holocene vegetation and hydrology variations and their associations with climate changes: a multi-proxy analysis of a sediment core from an alpine basin in the middle Tianshan Mountains

et al. 2021

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Trend of increasing Holocene summer precipitation in arid central Asia: Evidence from an organic carbon isotopic record from the LJW10 loess section in Xinjiang, NW China

Cited by 46 publications

References 74 publications

Holocene Moisture Variations in Western Arid Central Asia Inferred From Loess Records From NE Iran

Holocene Moisture Variations in Western Arid Central Asia Inferred From Loess Records From NE Iran

Consistent long‐term Holocene warming trend at different elevations in the Altai Mountains in arid central Asia

Holocene vegetation and hydrology variations and their associations with climate changes: a multi-proxy analysis of a sediment core from an alpine basin in the middle Tianshan Mountains

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