Sediment grain–size characteristics and relevant correlations to the aeolian environment in China's eastern desert region

Zhang, Chunlai; Shen, Yaping; Li, Qing; Jia, Wenru; Li, Jiao

doi:10.1016/j.scitotenv.2018.01.270

Cited by 31 publications

(13 citation statements)

References 38 publications

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“…Table 2. Components of silt-clay in different deserts (Data from reference [19,23,31,32,). As shown in Figure 1, the distribution of silt-clay content in different areas without wind desertification ranged from 39.7% to 62.5%.…”

Section: Occurrence Regularity Of Silt-clay Minerals In Wind Eroded Dmentioning

confidence: 99%

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Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Liu

Sun

et al. 2021

Sustainability

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Wind erosion desertification is the most serious type of land degradation in Northwest China, so it is an important task for ecological management in the region. As the core of ecological management, soil quality is mainly affected by the presence of silt–clay content. Therefore, the grasp of its occurrence regularity is the key to controlling wind erosion desertification. At present, research on silt–clay contents is mainly independent in each local area and lacks integrity, which makes it difficult to meet the overall evaluation and planning requirements. To this end, this paper reviewed the related studies on the occurrence and control of wind erosion desertification in recent years and collected nearly 300 relevant silt–clay content data points. We studied the occurrence regularity of silt–clay content during the occurrence and treatment of wind erosion desertification and revealed the mechanism of silt–clay content in different processes. On this basis, the degree of wind erosion desertification in the major areas of Northwest China in the last five years was evaluated by calculations based on soil typing theory, and the fractal dimension interval (2.41–2.53) for the critical discrimination of desertification in these areas was obtained. The results showed that there were obvious distribution intervals of silt–clay content for different degrees of wind erosion desertification. Qualitative changes in soil quality during degradation ranged from light to moderate wind erosion desertification. The occurrence and control of wind erosion desertification were largely affected by the processes of silt–clay particles loss and aggregation. Among the three main treatment measures, biological measures enhanced silt–clay content most significantly. In this study, the occurrence regularity of silt–clay minerals in wind erosion desertification in Northwest China was revealed as a whole. This study provided a preliminary overall judgement of the dynamic evolution of wind erosion desertification, which provided a reference for the overall evaluation and global governance planning of wind erosion desertification in Northwest China.

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Section: Occurrence Regularity Of Silt-clay Minerals In Wind Eroded Dmentioning

confidence: 99%

“…The silt-clay contents of different desertification levels in different areas (Data from reference[19,23,31,32,[40][41][42][43][44][45][46][47][48][49][50][51][52][53]74]). …”

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confidence: 99%

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Liu

Sun

et al. 2021

Sustainability

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“…The grain size distribution, which is one of the basic physical properties of sediment, can reflect the dynamics of the source material as well as the transportation and deposition of the sediment, and it has been widely used for palaeoclimatic reconstructions [37][38][39][40][41][42][43][44]. Coarse clastic materials, such as sand, usually indicate an abundance of sediment sources and high transport energy, and vice versa.…”

Section: Proxy Interpretationmentioning

confidence: 99%

“…A series of Holocene climatic records have been obtained from lakes and peats in the area adjacent to our study site [30][31][32][33][34][35][36]. However, the problem of "wet early/middle Holocene and dry late Holocene" or "dry early Holocene and wet late Holocene" [30] is still ambiguous [37][38][39][40][41][42][43][44]. Various proxy records from different regions reflect the different Holocene environmental changes among northern, northeastern and southern China, although additional research is required to address the mechanisms underlying such changes.…”

Section: Introductionmentioning

confidence: 99%

Multi-proxy records of Holocene fluvio-lacustrine sediments in the southern Liaodong Peninsula, China

Ruifeng

Zhang

2020

E3S Web Conf.

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The Liaodong Peninsula is located in the present Asian summer monsoon (ASM) area and has frequent land-sea interactions that make it sensitive to climate change. Terrestrial sediments can continuously record climate change with high resolution. The range and time of the East Asian summer monsoon (EASM), the main Holocene climate change driver, can be better explained by the change in the sedimentary environment in the region. This paper presents the chronology, sedimentology and geochemistry of the Holocene fluvio-lacustrine sediments in the Paozi basin south of Liaodong Peninsula, China. The multi-agent records show that the temperature and humidity are slightly higher from before 5.2ka.cal.BP to warm / wet stage, and the relative transition time from the warmest / wet stage to cold / dry stage is from 5.2ka.cal.BP to 3.5ka.cal.BP. Then, the regional climate shifted to relatively drier and colder conditions after 3.5 ka.cal.BP. Compared with other records near our site, the climate and variations in the water level change of this palaeolake were controlled by the change in the Holocene EASM precipitation, and the insolation-driven temperature co-determined the dynamics. Furthermore, the formation and disappearance of the palaeolake was due to the strengthening and decline in the EASM, respectively.

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“…Climate change is an important driving factor affecting ecosystem services. Rising temperature, precipitation change, and extreme climate events will have a great impact on the ecosystem [3]. Climate resources are the most important renewable resources for the development of oasis.…”

Section: Introductionmentioning

confidence: 99%

Ecological Effects of Oasis Shelterbelts in Ulan Buh Desert

Luo¹,

Xin²,

Gao³

et al. 2022

Deserts and Desertification

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In arid region, shelterbelt is the ecological barrier for oasis. Understanding its ecological effects can provide theoretical supports for its long-term management and sustainable development. Two standard meteorological stations were used to monitor climatic factors continuously for 7 years, and two 50 m dust monitoring towers were used to continuously monitor sandstorm for 10 times, which were located inside and outside oasis shelterbelts in the northeastern edge of Ulan Buh Desert. The microclimate differences were analyzed, as well as the ecological effects of oasis shelterbelts was clarified inside and outside oasis. In the present study, under the influence of a large-scale shelterbelts, air temperature, land ground temperature and evaporation respectively decreased 5.13% ~ 24.74%, 2.38% ~ 20.09% and 7.06% ~ 17.68%, whereas the relative humidity and precipitation respectively increased 6.93% ~ 25.53% and 4.30% ~ 50.15%. During the occurrence of sandstorms, the wind speed inside and outside shelterbelt showed an increasing trend with the increase in height. The relationship between wind speed and height was expressed as a power function. The wind direction was mainly W, WNW and NE, but the proportion of each direction was different inside and outside shelterbelt. When the sandstorm passed through oasis shelterbelts, the wind speed was significantly weakened, with an average reduction of 30.68%. The horizontal aeolian sediment flux decreased 414.44 g·m−2 and the aeolian deposition flux decreased 0.81 g·m−2. The results revealed that the microclimate was improved by oasis shelterbelts, especially in the growing season. Therefore, oasis shelterbelts help to maintain the sustainable development of oasis.

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Sediment grain–size characteristics and relevant correlations to the aeolian environment in China's eastern desert region

Cited by 31 publications

References 38 publications

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Multi-proxy records of Holocene fluvio-lacustrine sediments in the southern Liaodong Peninsula, China

Ecological Effects of Oasis Shelterbelts in Ulan Buh Desert

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