The climatic and environmental records in the sediment of the Luobei billabong in the district of Lop-Nur, Xinjiang in recent 30ka

Luo, Chao; Yang, Dong-Yoon; Peng, Zicheng; Zhang, Zhaofeng; Liu, Weiguo; He, Jianfeng

doi:10.1016/j.gca.2006.06.758

Cited by 5 publications

(8 citation statements)

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“…The grey desert soil is one of the most typical arid desert oasis soil types in northwestern China, where the diurnal temperature differences are large and the annual evaporations are high with soil wetting and drying cycles being frequent and soil freezing and thawing being dramatic (Luo et al, 2006;Xu and Liu, 2006). Studies showed that SOC is easily affected by environmental factors in this area.…”

Section: Introductionmentioning

confidence: 99%

Crop yields and soil organic carbon dynamics in a long-term fertilization experiment in an extremely arid region of northern Xinjiang, China

et al. 2017

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A long-term fertilization experiment was set up in northern Xinjiang, China to evaluate the dynamics of crop production and soil organic carbon (SOC) from 1990 to 2012 with seven fertilization treatments. The seven treatments included an unfertilized control (CK) and six different combinations of phosphorus (P), potassium (K), nitrogen (N), straw (S) and animal manure (M). The balanced fertilization treatments had significantly (P<0.05) higher average yields than the unbalanced ones. The treatment with 2/3 N from potassium sulfate (NPK) and 1/3 N from farmyard manure (NPKM) had a higher average yield than the other treatments. The average yields (over the 23 years) in the treatments of NPK, and urea, calcium superphosphate (NP) did not differ significantly (P>0.05) but were higher than that in the treatment with urea and potassium sulfate (NK; P<0.05). The results also show that the highest increases in SOC (P<0.05) occurred in NPKM with a potential increase of 1.2 t C/(hm 2 •a). The increase in SOC was only 0.31, 0.30 and 0.12 t C/(hm 2 •a) for NPKS (9/10 N from NPK and 1/10 N from straw), NPK and NP, respectively; and the SOC in the NP, NK and CK treatments were approaching equilibrium and so did not rise or fall significantly over the 23-year experiment. A complete NPK plus manure fertilization program is recommended for this extremely arid region to maximize both yields and carbon sequestration.

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Section: Introductionmentioning

confidence: 99%

Crop yields and soil organic carbon dynamics in a long-term fertilization experiment in an extremely arid region of northern Xinjiang, China

et al. 2017

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“…Many vegetation and climate studies in the Lop Nur area have been undertaken (Yan et al 1983;Wu 1994;Yan et al 1998Yan et al , 2000Wang et al 2000Wang et al , 2004Wang and Zhao 2001;Zhao et al 2001;Zhong et al 2005;Luo et al 2007), but with the exception of Zhao et al (2001), who dealt with the history of Lop Nur in the Neogene (Pliocene), all this research focused on the Quaternary. In the present paper, the paleovegetation and paleoclimate of Lop Nur in the late Miocene were investigated, and the trend of climatic and altitudinal changes in the Lop Nur area from late Miocene until present analyzed based on our work and the published pollen records.…”

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confidence: 99%

Vegetation and climate of the Lop Nur area, China, during the past 7 million years

Ferguson

Chang

et al. 2011

Climatic Change

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Lop Nur in Xinjiang, Northwest China, is located in the lowest part of the Tarim Basin at an altitude of 780 m and experiences an extremely dry climate with an annual precipitation of only 17 mm and a high evaporation rate of 2,728 mm. The pollen and spores from the Late Miocene strata of a borehole in Lop Nur were analyzed with a view to interpreting the paleoenvironmental evolution of Lop Nur. Main types of pollen such as Chenopodiaceae, Nitraria, Ephedra and Artemisia reflect an arid climate. By collating the palynological data in this area as recorded in other literature and by applying the method of Coexistence Analysis, we have obtained the paleoclimatic parameters from Late Miocene to Holocene in Lop Nur. These suggest that temperatures increased from the Late Miocene (10.2°C) to the Pliocene (13.4°C), decreased from Pliocene to Pleistocene (4.7°C), and were more stable from Holocene (12.1°C) until now (11.5°C). The precipitation was stable (about 900 mm) from Late Miocene to Early Pleistocene, then decreased markedly (to about 300 mm) in Middle and Late Pleistocene, and reached its lowest value (17.4 mm) in the Holocene. The changes in paleoclimate at Lop Nur provide new evidence for understanding the uplift of the Qinghai-Tibetan Plateau.

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“…The palaeoclimatic history reported here is also documented in lake sediments of the Lop Nor in the easternmost part of the Tarim Basin, where environmental proxies of carbonate content and colour index reveal a long‐term trend of aridification since about 30 ka despite several fluctuations (Luo et al . ; Fig. D).…”

Section: Discussionmentioning

confidence: 83%

“…D. Carbonate content from the Lop Nor ( LN in the easternmost part of the Tarim Basin, NW China (Luo et al . ). E. Mean effective moisture over the past 50 kyr from the Asian Monsoon margin ( AMM ) (Herzschuh ).…”

Section: Discussionmentioning

confidence: 97%

Late Quaternary loess deposition in the southern Chaiwopu Basin of the northern Chinese Tian Shan foreland and its palaeoclimatic implications

Lü

Niu

et al. 2015

Boreas

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The piedmont aeolian sediment in Central Asia is has been widely used for Quaternary palaeoclimatic reconstructions. Here we present detailed sedimentological and rock magnetic investigations on 188 samples from the~9.4m-thick Urumqi River section (URS) in the southern Chaiwopu Basin of the northern Chinese Tian Shan foreland. Optically stimulated luminescence (OSL) dating constrains the time-span of the URS loess sedimentation from c. 28 to c. 6.8 ka. This chronology implies that the onset of the URS loess sedimentation is approximately synchronous with the Shangwangfeng Glaciation (MIS 2) in the headwaters of the Urumqi River. Analyses of sediment grain size and rock magnetic parameters indicate that sediment grain-size composition controls magnetic properties of the URS loess, i.e. the wind intensity model, distinct from the pedogenic model interpreting the variations in magnetic properties of the loess in the Chinese Loess Plateau (CLP). Overall, the variations in sediment grain size and magnetic properties throughout the URS indicate that the present study area was dominated by a climate of strengthened wind associated with gradually intensified aridity during the latest Pleistocene. In contrast, the intensity of aridity and coldness during the early Holocene gradually became relatively weakened.

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The climatic and environmental records in the sediment of the Luobei billabong in the district of Lop-Nur, Xinjiang in recent 30ka

Cited by 5 publications

References 0 publications

Crop yields and soil organic carbon dynamics in a long-term fertilization experiment in an extremely arid region of northern Xinjiang, China

Crop yields and soil organic carbon dynamics in a long-term fertilization experiment in an extremely arid region of northern Xinjiang, China

Vegetation and climate of the Lop Nur area, China, during the past 7 million years

Late Quaternary loess deposition in the southern Chaiwopu Basin of the northern Chinese Tian Shan foreland and its palaeoclimatic implications

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