Climatic background of aeolian sand accumulation in the proximal sandy deserts/lands and its potential genetic linkage with loess in the Chinese Loess Plateau

IF 1.9 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International Pub Date : 2024-06-08 DOI:10.1016/j.quaint.2024.05.013

Minmin Gao , Yuxin Fan , Qingsong Cai , Xueyu Yan , Ke Bi , Chuanying Zhu , Guangliang Yang , Qingsong Zhang

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Abstract

Sandy deserts/lands along the western edge of the Asian summer monsoon domain are regarded as the major dust source of the East Asia and Pacific Ocean. However, the climatic background of aeolian sand accumulation in sandy deserts/lands and the potential provenance linkage between sand accumulation in sandy deserts/lands and aeolian dusts in the Chinese Loess Plateau (CLP) remains controversial. Based on age data compiled from published studies, we analyze the climatic background of aeolian sand accumulation in the proximal sandy deserts/lands, and the potential linkage between aeolian sand accumulation and the synchronous aeolian dusts in the CLP. The following conclusions are achieved: 1) Aeolian sand accumulation is almost synchronous with the development of loess/palaeosol/lacustrine sediments within the proximal sandy deserts/lands, supporting the idea that in the proximal sandy deserts/lands the aeolian sand accumulated at the high regional effective moisture condition. 2) Coupled with climatic background in neighboring areas, the inconsistent changes during the latest ∼20 ka in accumulation rate between aeolian sands in sandy deserts/lands and loess in the CLP support the idea that the contribution from the proximal sandy deserts/lands to loess in the downwind CLP is limited.

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中国黄土高原近缘沙荒/沙地风化沙堆积的气候背景及其与黄土的潜在遗传联系

亚洲夏季季风域西部边缘的沙漠/沙地被认为是东亚和太平洋的主要沙尘源。然而，沙漠/沙地风沙堆积的气候背景以及沙漠/沙地风沙堆积与中国黄土高原（CLP）风沙的潜在产地联系仍存在争议。根据已发表研究的年龄数据，我们分析了近缘沙漠/沙地风沙堆积的气候背景，以及中国黄土高原风沙堆积与同步风化沙尘之间的潜在联系。得出以下结论1）风化沙的堆积与近沙质荒漠/荒地内黄土/古土壤/湖积沉积物的发育几乎同步，支持了近沙质荒漠/荒地的风化沙是在区域有效湿度较高的条件下堆积的观点。2）结合邻近地区的气候背景，沙质荒漠/荒地的风化砂与中风电场的黄土在最近∼20ka的堆积速率变化不一致，支持了近风向沙质荒漠/荒地对下风向中风电场黄土的贡献有限的观点。

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来源期刊

Quaternary International 地学-地球科学综合

CiteScore

5.60

自引率

4.50%

发文量

336

审稿时长

3 months

期刊介绍： Quaternary International is the official journal of the International Union for Quaternary Research. The objectives are to publish a high quality scientific journal under the auspices of the premier Quaternary association that reflects the interdisciplinary nature of INQUA and records recent advances in Quaternary science that appeal to a wide audience. This series will encompass all the full spectrum of the physical and natural sciences that are commonly employed in solving Quaternary problems. The policy is to publish peer refereed collected research papers from symposia, workshops and meetings sponsored by INQUA. In addition, other organizations may request publication of their collected works pertaining to the Quaternary.