Complex response of weathering intensity registered in the Andaman Sea sediments to the Indian Summer Monsoon over the last 40 kyr

Liu, Shengfa; Li, Jingrui; Zhang, Hui; Cao, Peng; Mi, Beibei; Khokiattiwong, Somkiat; Kornkanitnan, Narumol; Shi, Xuefa

doi:10.1016/j.margeo.2020.106206

Cited by 26 publications

(11 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degree of chemical weathering under specific environmental conditions is primarily controlled by climate (White and Blum, 1995). Generally, high temperatures and heavy precipitation favor more intense chemical weathering, whereas low temperatures and less precipitation hinder the reactions involved in chemical weathering (White and Blum, 1995;Huang et al, 2018 (Nesbitt and Young, 1982;Garzanti et al, 2013;Liu et al, 2020). Higher CIA and α Al E values correspond to stronger chemical weathering intensity.…”

Section: Weathering and Terrigenous Input Indicatorsmentioning

confidence: 99%

“…Higher CIA and α Al E values correspond to stronger chemical weathering intensity. CaO * in CIA is corrected by comparing the molar contents of CaO with Na 2 O, and the lower value is regarded as the CaO content in the silicate fraction (Singh et al, 2005;Liu et al, 2020). K 2 O is preferentially leached in aqueous fluids compared to the immobile Al 2 O 3 during the chemical weathering process (Nesbitt and Young, 1982); therefore, a lower K 2 O/Al 2 O 3 ratio could indicate increased chemical weathering related to strengthened monsoon rainfall, according to the basic principles of silicate weathering (Wei et al, 2004;Clift et al, 2014;Jiwarungrueangkul et al, 2019a).…”

Section: Weathering and Terrigenous Input Indicatorsmentioning

confidence: 99%

See 1 more Smart Citation

Sedimentary Responses to Climate Changes and Human Activities Over the Past 7400 Years in the Western Sunda Shelf

Shi

Lou

et al. 2021

Front. Earth Sci.

Self Cite

View full text Add to dashboard Cite

High-resolution records of grain size, major and trace elements, and Sr-Nd isotopes of Core K17 from the western Sunda Shelf were investigated to evaluate the response of weathering and terrigenous input to climatic changes and human activities over the past 7400 years. Sr-Nd isotopic results indicate that the Kelantan River is the main source of sedimentary material in the study core since the mid-Holocene. Chemical weathering levels are represented by the chemical index of alteration (CIA), αAlNa, and K2O/Al2O3 ratios; and geochemical and grain size proxies (including TiO2/CaO, Rb/Sr ratios, and grain size end-member) were used to establish variations of terrigenous input into the study core since 7400 cal yr BP. Based on these records, the evolution of weathering and terrigenous input processes in the western Sunda Shelf can be divided into four stages. During stage 1 (7400–3700 cal yr BP), increasing precipitation and decreasing temperature jointly balanced the relatively stable weathering and terrigenous sediment supply. Dramatically decreasing weathering rates were consistent with less rainfall and lower temperatures during stage 2 (3700–2600 cal yr BP). Heavy rainfall played a more important role than low temperature in controlling weathering and erosion, leading to increasing terrigenous input in stage 3 (2700–1600 cal yr BP). Because of the decoupling between weathering, erosion, and climate in the late Holocene (stage 4, since 1600 cal yr BP), increasing agriculture and related human activities likely dominated weathering and erosion relative to climate changes. Furthermore, the initial time at which human activity overwhelmed natural processes in the southern South China Sea (SCS) is similar to that in the northern SCS. Our results highlight that human activities during the past 1600 years have gradually overwhelmed natural climatic controls on weathering and erosion processes in the western Sunda Shelf.

show abstract

Section: Weathering and Terrigenous Input Indicatorsmentioning

confidence: 99%

Section: Weathering and Terrigenous Input Indicatorsmentioning

confidence: 99%

Sedimentary Responses to Climate Changes and Human Activities Over the Past 7400 Years in the Western Sunda Shelf

Shi

Lou

et al. 2021

Front. Earth Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Chemical weathering is one of the most important processes of the earth's elemental cycle, especially for the carbon cycle, and is closely related to tectonic, climatic, and environmental factors (Walker et al, 1981;Berner, 1992;Gaillardet et al, 1999;Yang et al, 2004a;Eiriksdottir et al, 2011;Miriyala et al, 2017;He et al, 2020;Liu et al, 2020). During the journey from "source" to "sink, " particles carry source chemical weathering signals to the sink area, which are interfered and modified by path signals, and form strata, containing chemical weathering signals.…”

Section: Introductionmentioning

confidence: 99%

“…The sea level mainly controls the relative input between the delta-shelf and the deep sea on a glacial-interglacial scale . Regardless of long or short time scales, climate change seems to be the closest factor, controlling the chemical weathering, with two basic parameters, i.e., the precipitation and temperature (Liu et al, 2020). The "competition" among these factors has been maintained throughout the late Quaternary in the area and preserved in the sediments, transported by rivers into the ocean.…”

Section: Introductionmentioning

confidence: 99%

“…In the northeast Indian Ocean, the Indian monsoon climate change, recorded by ocean indexes since the last glaciation, mainly embodied in glacial-interglacial, precessional and millennial scales variations, subjected to the global ice condition, the latitude distribution distinction of solar radiation, caused by the earth parameters, and the millennial climate events in the high latitudes of the northern hemisphere, respectively (Duplessy, 1982;Prell and Kutzbach, 1987;Schulz et al, 1998;Clemens and Prell, 2003;Gupta et al, 2005;Caley et al, 2011;Bolton et al, 2013;Cao et al, 2015;Mohtadi et al, 2016;Raza et al, 2017). These periodic changes are recorded in the marine sedimentary strata and have been subjected to study in several research (Clemens and Prell, 2003;Cao et al, 2015;Li et al, 2018Sebastian et al, 2019;Liu et al, 2020;Yu et al, 2020). If the chemical weathering evolution in the BoB is mainly controlled by the Indian monsoon climate, one or more of the above periodic changes should have occurred in its temporal variation trend.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Applicability and Variability of Chemical Weathering Indicators and Their Monsoon-Controlled Mechanisms in the Bay of Bengal

Liu

Shi

et al. 2021

Front. Earth Sci.

Self Cite

View full text Add to dashboard Cite

To help understanding the potential relationship between chemical weathering and Indian summer monsoon (ISM) since the last glacial period a gravity core (BoB-56) was retrieved from the central Bay of Bengal (BoB). The data of chemical weathering indexes (CIA, WIP, and αAlNa) used in this study showed general synchronicity with the regional monsoon precipitation and temperature record on precessional scale, indicating existence of control from the ISM on weathering. Corresponding to alteration of warm/cold period during the last deglaciation, obvious simultaneously alteration of higher/lower values of the chemical weathering and terrestrial input proxies’ record support our hypothesis that the ISM driving chemical weathering on the millennial scale. However, a contradiction occurred during the Holocene period, when the ISM precipitation and temperature rose to a higher level, while the alternative indexes unanimously reflected a weaker chemical weathering conditions. In this study, we discussed the applicability of chemical weathering indexes in the BoB during the Holocene period. Besides the possible weakened monsoon during 6–3 ka, recorded by the stalagmite δ18O and Sea Surface Temperature (SST) reconstruction results in the northeastern Indian Ocean, other factors were responsible for this phenomenon, including the grain size effect and distinction between the mountain high land and floodplain low land. The chemical weathering records, during the last glaciation, indicated the presence of control from the ISM on weathering at precessional and millennial scales. While, during the Holocene, they failed to reflect the actual chemical weathering dynamics of the source area. Indeed, a mixture of physical erosion and chemical weathering seems to be representative of the chemical weathering dynamics in the area. Our findings emphasized on the tight connections between the chemical weathering evolution and global-regional climate conditions around the BoB, implying possible ISM-controlled mechanisms during different time scales.

show abstract

Geochemistry of Sediments from a Subalpine Lake Sedimentary Succession in the Western Nanling Mountains, Southern China: Implications for Catchment Weathering During the Last 15 400 Years

Wang

Wei²,

Zhu³

et al. 2022

Chin. Geogr. Sci.

View full text Add to dashboard Cite

Complex response of weathering intensity registered in the Andaman Sea sediments to the Indian Summer Monsoon over the last 40 kyr

Cited by 26 publications

References 82 publications

Sedimentary Responses to Climate Changes and Human Activities Over the Past 7400 Years in the Western Sunda Shelf

Sedimentary Responses to Climate Changes and Human Activities Over the Past 7400 Years in the Western Sunda Shelf

Applicability and Variability of Chemical Weathering Indicators and Their Monsoon-Controlled Mechanisms in the Bay of Bengal

Geochemistry of Sediments from a Subalpine Lake Sedimentary Succession in the Western Nanling Mountains, Southern China: Implications for Catchment Weathering During the Last 15 400 Years

Contact Info

Product

Resources

About