Holocene aeolian activities linked to Indian summer monsoon in the middle reaches of the Yarlung Zangbo River

doi:10.1007/s11442-020-1824-6

Abstract

Abstract:

Widespread aeolian deposits on the Tibetan Plateau (TP) have provided valuable palaeoclimatic information. However, the primary factors (e.g., climate factors, human activity, and vegetation cover) controlling aeolian deposition remain elusive. In this paper, we use a dataset that comprises new and published ages of Holocene aeolian sand and loess in the middle reaches of the Yarlung Zangbo River to identify the primary controlling factors and palaeoclimatic implications of aeolian deposition. Several intervals of enhanced aeolian accumulation centered at 8.5-7.8, 6.4-5.8, 4.5-4.0, 3.1-1.8, and 0.9 ka are identified, generally consistent with regional low rainfall events and weak Indian summer monsoon (ISM). This suggests that regional wetness, dominated by the ISM, may play a key role in modulating dust emissions and aeolian deposition on centennial timescales. Our results show that on centennial- to millennial-scales, ISM activity can be reconstructed by non-continuous aeolian deposits in the monsoon dominated TP.

Key words: Holocene, aeolian activity, dust, Indian summer monsoon, Tibetan Plateau

LI Tuoyu, ZHANG Jifeng, WU Yongqiu, DU Shisong, MO Duowen, LIAO Yinan, CHEN Zhitong, LIU Jianbao, LI Qing. Holocene aeolian activities linked to Indian summer monsoon in the middle reaches of the Yarlung Zangbo River[J].Journal of Geographical Sciences, 2020, 30(12): 2002-2014.

Figures/Tables 6

Figure 1

Figure 2

Table 1

Table 2

Table 3

A dataset of synthesized ages of Holocene aeolian sediments in the middle reaches of the YZR"

Section	Depth (cm)	Dating method	Dating material	Age (ka/cal ka BP)	Latitude (°N)	Longitude (°E)	Altitude (m asl)	Source
TB1	350	OSL	Aeolian loess	2.70±0.20	29.3167	89.5500	3800	Sun et al., 2007
TB7	380	OSL	Aeolian loess	11.00±1.20	29.3167	88.9167	3920	Sun et al., 2007
DAR1	300-325	¹⁴C	Charcoal	3.15±0.08	—	—	—	Kaiser et al., 2009
STA1	50	OSL	Aeolian sand	2.90±0.20	29.6331	91.0978	3660	Kaiser et al., 2009
STA1	180	OSL	Aeolian sand	4.10±0.40	29.6331	91.0978	3667	Kaiser et al., 2009
STA1	280	OSL	Aeolian sand	6.70±0.50	29.6331	91.0978	3667	Kaiser et al., 2009
QUX 1	280	OSL	Aeolian sand	8.50±0.70	29.3553	90.7234	3603	Kaiser et al., 2009
QUX 2	325-330	¹⁴C	Charcoal	7.78±0.07	29.3659	90.7556	3536	Kaiser et al., 2009
Section 48	67-73	OSL	Aeolian loess	8.80±3.90	29.7333	89.8167	4571	Lehmkuhl et al., 2000
Section 49	47-53	OSL	Aeolian loess	7.80±1.20	29.7667	89.8500	4835	Lehmkuhl et al., 2000
LXD	170	OSL	Aeolian loess	7.90±0.90	29.3275	89.5386	3797	Hu et al., 2018
LXD	98	OSL	Aeolian loess	3.20±0.30	29.3275	89.5386	3797	Hu et al., 2018
Xigaze	—	¹⁴C	Organic matter	0.92±0.02	29.3057	88.8688	3811	Hu et al., 2018
TDD	87	OSL	Aeolian loess	2.60±0.30	29.3372	90.3236	3687	Hu et al., 2018
TDD	195	OSL	Aeolian loess	2.90±0.30	29.3372	90.3236	3687	Hu et al., 2018
TDD	285	OSL	Aeolian loess	5.00±0.50	29.3372	90.3236	3687	Hu et al., 2018
JB	260	TL	Aeolian sand	8.56±0.65	29.3969	89.3500	3890	Li et al., 2010
QS	430	TL	Aeolian loess	8.85±0.53	29.3900	90.7578	4000	Li et al., 2010
GM	340	¹⁴C	Organic matter	6.20±0.31	—	—	—	Li et al., 2010
GM	531	TL	Aeolian sand	8.30±0.30	—	—	—	Li et al., 2010
Cha'er	65	¹⁴C	Organic matter^a	2.23±0.10	29.3895	89.2823	3856	Zheng et al., 2009
Cha'er	235	TL	Aeolian sand	8.56±0.65	29.3895	89.2823	3856	Zheng et al., 2009
ZD	158	OSL	Aeolian loess	5.90±0.20	29.2466	91.7120	3561	Zheng, 2009
ZD	628	OSL	Aeolian sand	8.50±0.60	29.2466	91.7120	3561	Zheng, 2009
CGG	168	OSL	Aeolian sand	1.82±0.16	29.3653	91.1491	3652	Li et al., 2020
CGG	287	OSL	Aeolian sand	8.43±0.66	29.3653	91.1491	3652	Li et al., 2020
YJP1	0.4	OSL	Sandy loess	1.90±0.10	29.4556	94.4693	2943	Ling et al., 2020
YJP1	0.9	OSL	Sandy loess	3.90±0.30	29.4556	94.4693	2943	Ling et al., 2020
YJP1	1.4	OSL	Sandy loess	4.40±0.30	29.4556	94.4693	2943	Ling et al., 2020
YJP1	1.9	OSL	Sandy loess	4.30±0.30	29.4556	94.4693	2943	Ling et al., 2020
YJP1	2.5	OSL	Sandy loess	5.10±0.40	29.4556	94.4693	2943	Ling et al., 2020
YJP1	3	OSL	Sandy loess	3.20±0.20	29.4556	94.4693	2943	Ling et al., 2020
YJP1	3.6	OSL	Sandy loess	8.30±0.60	29.4556	94.4693	2943	Ling et al., 2020
YJP2	1.7	OSL	Sandy loess	110±0.90	29.4556	94.4693	2943	Ling et al., 2020
MLP	6.5	OSL	Aeolian sand	4.50±0.30	29.1189	93.7781	3004	Ling et al., 2020
MLP	10	OSL	Aeolian sand	6.20±0.50	29.1189	93.7781	3004	Ling et al., 2020
LXP	1.3	OSL	Sandy loess	4.90±0.40	29.0668	92.7993	3172	Ling et al., 2020
LXP	2	OSL	Sandy loess	6.50±0.50	29.0668	92.7993	3172	Ling et al., 2020
SRP	0.7	OSL	Aeolian sand	0.40±0.10	29.2617	91.9873	3553	Ling et al., 2020
Section	Depth (cm)	Dating method	Dating material	Age (ka/cal ka BP)	Latitude (°N)	Longitude (°E)	Altitude (m asl)	Source
SRP	1.4	OSL	Aeolian sand	0.80±0.10	29.2617	91.9873	3553	Ling et al., 2020
SRP	2.1	OSL	Aeolian sand	1.00±0.10	29.2617	91.9873	3553	Ling et al., 2020
SRP	2.8	OSL	Aeolian sand	1.10±0.10	29.2617	91.9873	3553	Ling et al., 2020
SRP	3.5	OSL	Aeolian sand	1.00±0.10	29.2617	91.9873	3553	Ling et al., 2020
SRP	4.2	OSL	Aeolian sand	1.20±0.10	29.2617	91.9873	3553	Ling et al., 2020
SRP	4.9	OSL	Aeolian sand	4.10±0.40	29.2617	91.9873	3553	Ling et al., 2020
LCP	2.9	OSL	Sandy loess	9.20±0.80	29.3872	89.3254	3815	Ling et al., 2020
DRX	70	OSL	Aeolian sand	0.79±0.10	29.3664	91.1494	3656	This study
RM	30	OSL	Aeolian loess	1.83±0.29	29.3528	88.4615	3876	This study
RM	210	OSL	Aeolian loess	4.64±0.36	29.3528	88.4615	3876	This study
WL	52	¹⁴C	Organic matter	0.67±0.01	29.1445	93.6766	3092	This study
SK	437	¹⁴C	Charcoal	3.01±0.04	29.2995	91.4115	3557	This study
DPZ	438	OSL	Aeolian sand	1.76±0.18	29.2835	91.6485	3584	This study

Table 3

Figure 3

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Sample	Depth (cm)	U (ppm)	Th (ppm)	K (%)	Dose rate (Gy?ka^?1)	De/Gy	OSL age (ka)
DRX-OSL	68-72	1.56±0.3	13.95±0.7	2.41±0.04	3.73±0.27	2.93±0.30	0.79±0.10
RM-OSL-1	28-32	2.64±0.039	17.8±0.025	2.46±0.026	4.36±0.32	7.99±0.40	1.83±0.29
RM-OSL-3	208-212	3.09±0.038	19.2±0.024	2.06±0.030	4.17±0.31	19.35±0.98	4.64±0.36
DPZ-OSL-3	436-440	4.16±0.034	18.2±0.025	2.36±0.028	4.76±0.35	8.37±0.42	1.76±0.18

Sample	Depth/cm	Dating material	Conventional ¹⁴C age (BP, 2σ)	Calibrated¹⁴C age (BP, 2σ)
SK-¹⁴C-1	435-439	Charcoal	2880±25	3005±37
WL-¹⁴C-1	50-55	Total organic matter	710±20	670±6