Research in Cold and Arid Regions最新文献

{"title":"Unified elastoplastic solution for the stress and displacement of tunnel lining and surrounding rock in cold areas considering heterogeneous characteristics","authors":"Bin Wang ,&nbsp;ZiHao Zhang ,&nbsp;XiuLing Liang ,&nbsp;ChuanXin Rong ,&nbsp;HaiBing Cai","doi":"10.1016/j.rcar.2024.11.004","DOIUrl":"10.1016/j.rcar.2024.11.004","url":null,"abstract":"<div><div>The lining and surrounding rock around tunnels constructed in cold areas exhibit nonuniform material properties due to the existence of a temperature field. This study considered the effects of these properties on the integrity of tunnel structures. By establishing an elastoplastic mechanical model, analytical solutions to the stress and displacement under five different elastoplastic states were derived and compared based on distinct yield criteria. The findings showed that with increasing relative radius, the displacement in the lining elastic zone initially decreased before increasing, whereas the shift in the plastic zone continued to increase. The displacement in the elastic zone of the frozen surrounding rock intensified with increasing relative radius, whereas the shift in the plastic zone experienced a gradual decline. The displacement of the inner wall of the lining was always greater than that of the outer wall, and this phenomenon occurred only after the frozen surrounding rock exhibited a plastic zone. The maximum displacements of the liner in its elastically limited and plastically limited states were 1.39, 1.77, 2.28, and 2.37 mm and 15.93, 25.51, 44.28, and 48.58 mm based on the Drucker–Prager (DP), Mohr–Coulomb (MC), Tresca, and double-shear strength criteria, respectively; the maximum limit displacements of the frozen surrounding rock were 12.74, 20.41, 35.43, and 38.87 mm and 85.32, 103.38, 569.23, and 680.43 mm, respectively. With increasing relative radius, the radial stresses within both the lining and the frozen surrounding rock intensified; and the tangential stress in the elastic zone of the lining decreased whereas the opposite change rule was observed in the plastic zone. The tangential stresses in the frozen surrounding rock and lining exhibited the same variation trend. Based on calculations with four distinct strength criteria, the elastic and plastic ultimate bearing capacities of the lining were 1.81, 2.31, 2.95, and 3.07 MPa, and 3.31, 4.84, 7.48, and 8.05 MPa, while those of the frozen surrounding rock were 8.52, 13.24, 22.17, and 24.18 MPa, and 16.76, 32.46, 74.15, and 85.64 MPa. In addition, with the expansion of the plastic zone, the phenomenon of a sudden change in the tangential stress at location <em>r</em>₂ became progressively attenuated. The study findings can provide some theoretical guidance for the design and construction of tunnels in cold areas.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 6","pages":"Pages 278-291"},"PeriodicalIF":0.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of alpine meadow degradation on the soil physical and chemical properties in Maqu, China","authors":"KeCun Zhang ,&nbsp;JiaPeng Pan ,&nbsp;ZhiShan An ,&nbsp;Yu Zhang ,&nbsp;YanPing Yu","doi":"10.1016/j.rcar.2024.10.001","DOIUrl":"10.1016/j.rcar.2024.10.001","url":null,"abstract":"<div><div>While alpine meadow degradation presents a significant ecological challenge, research on the complex patterns of soil property changes induced by degradation has been somewhat limited. In this study, we investigated the Maqu alpine meadow, meticulously categorizing it into different grassland types exhibiting varying degrees of degradation based on factors such as vegetation coverage and community, soil characteristics, and landscape features. These classifications included typical grassland, degraded grassland, desertified grassland, and sandy land. In August 2018, we established three quadrats at each sample point and collected soil samples at five depths (surface (0–2 cm), 2–5 cm, 5–10 cm, 10–20 cm, and 20–40 cm) to analyze soil particle size distribution (PSD) and nutrients content. The results revealed a discernible trend: alpine meadow degradation led to selective loss of nutrient-rich soil fine particles, resulting in significant alterations in soil PSD and nutrients, particularly pronounced in grasslands with low degrees of degradation. Moreover, within a specific range of degradation degree, the clay content in the shallow soil of alpine meadow increased with the degradation degree, but it declined when the degradation degree exceeded a certain threshold. Degradation also disrupted the intricate relationship between soil nutrients, with notable variations in their coupling. This difference was also reflected in the influence of soil physical and chemical properties on soil nutrients, with the explanatory power of each environmental indicator on soil nutrients decreasing significantly with increasing degradation. This study systematically analyzed the variation in soil physical and chemical properties throughout the degradation process, revealing the mechanism of soil nutrient imbalance and decline caused by the degradation process. It provides crucial theoretical foundations and reference points for the preservation and rejuvenation of alpine meadows, enriching the methodology for assessing the impact of grassland degradation.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 6","pages":"Pages 269-277"},"PeriodicalIF":0.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular mechanisms of seed germination in Hippophae rhamnoides L. based on transcriptomics","authors":"ZiYi Cheng,&nbsp;YongFan Chen,&nbsp;HuiJun Yuan","doi":"10.1016/j.rcar.2024.11.003","DOIUrl":"10.1016/j.rcar.2024.11.003","url":null,"abstract":"<div><div><em>Hippophae rhamnoides</em> L. is extensively distributed throughout China and plays a pioneering role in combating desertification and soil erosion in northern regions. <em>H. rhamnoides</em> contains abundant nutrients and is of medical and economic value. However, there has been a lack of research on sea buckthorn seeds, both domestically and internationally, particularly regarding the mechanisms governing their growth and germination. Therefore, to explore the growth of sea buckthorn seeds, this study analyzed and studied the molecular mechanism of seed germination process of sea buckthorn. To better understand the molecular mechanism underlying seed germination in sea buckthorn, we used transcriptomics to compare gene expression before and after seed germination in <em>H. rhamnoides</em> subsp. <em>sinensis Rousi</em>. We identified 9,988 differentially expressed genes (5,593 upregulated and 4,395 downregulated). A bioinformatics-based analysis revealed that changes in plant hormone signal transduction and starch and sucrose metabolism-related gene expression may regulate seed germination in this species. Notably, the levels of auxin (IAA), cytokinin (CTK), and brassinosteroids (BR) increased during seed germination while those of ABA decreased. Exogenous application of IAA, CTK, and BR promoted sea buckthorn seed germination, while ABA inhibited it. These findings suggested that hormones play an important role in the process of sea buckthorn seed germination. This study provides preliminary information about the seed germination mechanism in sea buckthorn, offering an essential reference for improving seed breeding and germplasm and laying the foundation for further resistance research on the molecular mechanism of seed germination of sea buckthorn in this species.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 6","pages":"Pages 310-322"},"PeriodicalIF":0.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatio-temporal response of vegetation coverage at multiple time scales to extreme climate in the Qinling mountains in Northwest China","authors":"Qing Meng,&nbsp;XiaoBang Peng,&nbsp;ShanHong Zhang","doi":"10.1016/j.rcar.2024.11.005","DOIUrl":"10.1016/j.rcar.2024.11.005","url":null,"abstract":"<div><div>Monitoring spatio-temporal variations in vegetation coverage and linking them to climatic drivers is crucial for guiding environmental management and understanding climate change. In this study, Pearson's correlation, MODIS NDVI time series, precipitation and temperature data, and extreme climate indices were used to investigate the response of vegetation to extreme climate at the monthly, seasonal, and yearly scales in the Qinling Mountains (QMs) in China from 2001 to 2020. The results indicate that vegetation coverage increased over time at a rate of 2.9×10⁻³ per year. The QMs exhibited good vegetation coverage (average NDVI = 0.64), with over 64% of the area featuring NDVI values between 0.60 and 0.80. The Mean center was located in Ningshan County on the southern slope of the QMs. The spatial pattern of the annual average NDVI on the northern and southern slopes of the QMs was consistent with the seasonal average variation, with high values in the middle and low values at the edges. As transitional climate regions, the QMs exert a significant impact on vegetation. Spring maximum continuous 5-day monthly precipitation (Rx5day) and spring precipitation were the two most significant positive controlling factors affecting vegetation. Specifically, aside from water bodies, grasslands exhibited the largest response to these two factors. Good vegetation conditions in the QMs are of great significance for regulating climate and conserving water sources. Furthermore, they are important for controlling the response of vegetation to climatic conditions and, in a deeper sense, are of great significance for vegetation restoration, ecological protection, and carbon neutrality.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 6","pages":"Pages 302-309"},"PeriodicalIF":0.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frost-resistant embankments with a novel ground source heat pump system","authors":"TianFei Hu ,&nbsp;Li Wang ,&nbsp;TengFei Wang ,&nbsp;TieCheng Sun ,&nbsp;TianFeng Li","doi":"10.1016/j.rcar.2024.10.002","DOIUrl":"10.1016/j.rcar.2024.10.002","url":null,"abstract":"<div><div>This study introduces a novel artificial heating technique aimed at addressing frost heave issues in embankments on frozen ground, offering a sustainable solution. Initial evaluations assessed various heating systems, including boilers, heat pumps, solar heaters, and electric heaters, focusing on their thermal performance and applicability. The study subsequently designed and implemented a direct-expansion ground source heat pump (DX-GSHP) system as the primary heat source for embankment warming. Rigorous testing confirmed the DX-GSHP system's ability to maintain a heat-supply temperature above 40 °C and a heat-absorption temperature below −3.5 °C, effectively extracting geothermal energy for transfer to the topsoil layers. With a demonstrated coefficient of performance (COP) of 3.49, the DX-GSHP system not only proves its energy efficiency but also suggests a potential role in reducing the strain on electricity supply systems. Installation of DX-GSHPs, with heating capacities ranging from 1.0 to 2.0 kW and spaced at intervals of 2.0–4.0 m, provides a rapid thermal response to frost heave in single-track railway embankments, thereby potentially mitigating frost-induced damage in cold climate regions.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 6","pages":"Pages 292-301"},"PeriodicalIF":0.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High ecostoichiometric stability and accumulating SiO2 and NO3− as main physiological adaptive mechanisms for reed to adverse environments","authors":"JianJun Kang ,&nbsp;Fan Yang ,&nbsp;DongMei Zhang ,&nbsp;LiWen Zhao","doi":"10.1016/j.rcar.2024.10.007","DOIUrl":"10.1016/j.rcar.2024.10.007","url":null,"abstract":"<div><div>Previous studies have shown that nutrients accumulation played important roles in resisting to stress resistance of plants. Our study examined the ecostoichiometric internal stability (EIS) of nutrients accumulation and, concomitantly identified the main resistant regulating substances and their contributions to stress resistance of reed (Gramineae) in arid desert areas. Plants (digging method) and soil samples (quartering method)) obtained from sand dune (SD), desert steppe (DP), interdune lowland (IL), saline meadow (SM) and wetland (W) habitats were brought back to the lab for nutrients analysis. Results indicated that soil nutrients differed obviously, while reed maintained relatively stable ratios of SiO₂:N, N:K, and P:K when the eco-environments changed in different habitats. Furthermore, reed exhibits common adaptive characteristics by mainly accumulating large amounts of SiO₂ (122.6–174.0 g/kg) and NO₃⁻ (166.1–216.6 g/kg), as well as moderate levels of soluble sugar (SS: 24.0–55.0 g/kg), which are mainly stored in leaves for stress resistance. The contribution of ions to stress resistance was 80.03%–91.15% (with SiO₂ and NO₃⁻ accounting for 54.91%–63.10%), whereas the contribution of solutes was only 8.85%–19.97% (with SS contributing to 5.14%–10.91%) in different habitats. These findings suggest that maintaining relatively high EIS, while still accumulating SiO₂ and NO₃⁻ as main physiological regulators might be an effective strategy for reed to positively respond to adverse habitats, which provide a strong theoretical basis and technical reference for searching useful methods for restoration and reconstruction of the degraded ecosystems in desert oasis regions.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 5","pages":"Pages 250-258"},"PeriodicalIF":0.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mining rhizobacteria from indigenous halophytes to enhance alfalfa (Medicago sativa L.) growth and soil reclamation in saline soils of Northwest China","authors":"XiXi Ma ,&nbsp;Jing Pan ,&nbsp;Qi Guo ,&nbsp;CuiHua Huang ,&nbsp;Jun Zhang ,&nbsp;Hui Yang ,&nbsp;Xian Xue","doi":"10.1016/j.rcar.2024.09.004","DOIUrl":"10.1016/j.rcar.2024.09.004","url":null,"abstract":"<div><div>Enhancing the growth of alfalfa (<em>Medicago sativa</em> L.) through inoculation with rhizobacteria represents a sustainable strategy for reclaiming saline soils. However, the lack of suitable strains and practical application guidelines poses significant challenges to the utilization of Plant Growth-Promoting Rhizobacteria (PGPR) in salt-affected soils of Northwest China. In this study, we selected four PGPR strains derived from indigenous halophytes based on their growth-promoting characteristics. These strains underwent further selection via a petri dish assay. Subsequently, the effects of the selected PGPR strains on alfalfa growth and soil fertility were rigorously examined through pot trials. The results demonstrated that <em>Bacillus filamentosus</em> HL3, <em>B. filamentosus</em> HL6, <em>Bacillus subtilis</em> subsp. <em>stercoris</em> HG12, and <em>Paenibacillus peoriae</em> HG24 significantly produced indole-3-acetic acid (IAA), solubilized phosphorus, and fixed nitrogen (except for <em>B. filamentosus</em> HL6, which did not significantly fix nitrogen). Compared to non-inoculated plants, <em>B. filamentosus</em> HL6 and <em>B. subtilis</em> subsp. <em>stercoris</em> HG12 significantly enhanced seed germination, root elongation, and seedling biomass in a 150 mmol/L NaCl saline solution. In saline-alkaline soils, PGPR inoculation under brackish water irrigation did not restore alfalfa growth to the levels observed under freshwater irrigation. Principal Component Analysis (PCA) condensed ten indicators into two indices, explaining 86.85% of the variance. Using these two indices as weights, an evaluation model for the PGPR-alfalfa symbiosis indicated that <em>B. subtilis</em> subsp. <em>stercoris</em> HG12 had the most substantial effect under freshwater irrigation, while co-inoculation with <em>B. subtilis</em> subsp. <em>stercoris</em> HG12 and <em>B. filamentosus</em> HL6 had the most significant impact on alfalfa growth and soil improvement under brackish water irrigation. Available phosphorus was identified as the primary factor influencing alfalfa growth, contributing 82.3% to the growth variation. These findings provide suitable microbial strains for the utilization of saline-alkali land and underscore the potential of applying indigenous PGPR-alfalfa symbiotic techniques to improve soil fertility and crop yield in the arid regions of Northwest China.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 5","pages":"Pages 215-228"},"PeriodicalIF":0.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic coupled coordination and spatial correlation between ice-snow tourism network attention and tourism industry development systems: Evidence from 31 provinces of China","authors":"QiuLing Ge ,&nbsp;JianPing Yang ,&nbsp;YiLin Wang","doi":"10.1016/j.rcar.2024.09.003","DOIUrl":"10.1016/j.rcar.2024.09.003","url":null,"abstract":"<div><div>Using the coupled coordination degree model, DEA coupled coordination efficiency model, and spatial autocorrelation model, this study explored the dynamic coupled coordination relationship and spatial correlation between the ice-snow tourism network attention and tourism industry development in 31 Chinese provinces and proposed suggestions pertaining to development. Our findings showed that (1) most provinces have not yet achieved excellent coordinated development between the two systems, and the coupled coordination efficiency is low. Each province's coupled coordination degree and coordination efficiency exhibited a small increase. (2) Spatial differences in the coupled coordination level and coordination efficiency of the two systems in each province were more evident. In seven provinces, including Heilongjiang, tourism industry development demonstrated a relatively high utilization rate and enhanced ice-snow tourism network attention. (3) The rankings of the coupled coordination degree and coordination efficiency of the two systems in each province remained relatively stable at the upper and lower ends, with large changes in the central provinces. The coupled coordination efficiency of Heilongjiang, Beijing, Jilin, and Shanghai remained at the top of the list steadily, whereas Tibet, Anhui, and Qinghai stayed at the bottom. In contrast, the ranking of the coupled coordination efficiency of Inner Mongolia, Henan, and Jiangsu displayed a great change. (4) The spatial correlation analysis revealed a positive correlation that decreased annually. Some provinces exhibited characteristics of spatial aggregation, with a high-high aggregation effect in Liaoning and Jilin, a low-low aggregation effect in Gansu and Qinghai, and no spatial aggregation effect in most other provinces.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 5","pages":"Pages 259-267"},"PeriodicalIF":0.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial and temporal distribution patterns of ants (Hymenoptera: Formicidae) in Gobi Desert ecosystems, Northwest China","authors":"JiaLong Ren ,&nbsp;YiLin Feng ,&nbsp;YongZhen Wang ,&nbsp;WenZhi Zhao ,&nbsp;ZhiBin He ,&nbsp;Chang Qin ,&nbsp;QiHan Yan ,&nbsp;WeiDong Xin ,&nbsp;ChengChen Pan ,&nbsp;JiLiang Liu","doi":"10.1016/j.rcar.2024.10.004","DOIUrl":"10.1016/j.rcar.2024.10.004","url":null,"abstract":"<div><div>Ants (Hymenoptera: Formicidae) represent the most critical arthropod community in desert ecosystems, where interactions among vegetation, soil, and climate dictate ant assemblages. Nonetheless, our understanding of how various factors influence desert ant assemblages across different spatial and temporal scales remains limited. Therefore, this study aims to analyse the temporal and spatial distribution patterns of desert ants and to determine the effects of precipitation and temperature variations on ant assemblages. To achieve this, we continuously monitored the monthly dynamics of ants at 72 uniform 8m×8m grid points in the Gobi Desert ecosystem of Northwest China from 2015 to 2020 using pitfall traps. The results indicated that <em>Messor desertus</em> and <em>Cataglyphis aenescens</em> were the dominant ant species, with significant annual and monthly variations in the number of individuals captured from 2015 to 2020. In 2020, monthly captures of <em>M. desertus</em> exhibited a bimodal pattern, peaking in November, whereas those of <em>C. aenescens</em> exhibited a unimodal pattern, peaking in June. Annual data revealed that population size was significantly positively correlated spatially at a distance of 24 m. Semi-variance analysis and Moran's <em>I</em> indicated that structural factors predominantly controlled the ant assemblages at a small scale from 2015 to 2020. Annual catches of desert ants tended to decrease with increasing annual precipitation, while an opposite trend was rising average annual temperatures. In conclusion, variations in annual and monthly precipitation and temperature influenced the temporal response patterns of desert ants, thereby altering their spatial assemblages.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 5","pages":"Pages 229-238"},"PeriodicalIF":0.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatio-temporal change and driving mechanisms of land use/cover in Qarhan Salt Lake area during from 2000 to 2020, based on machine learning","authors":"Chao Yue ,&nbsp;ZiTao Wang ,&nbsp;JianPing Wang","doi":"10.1016/j.rcar.2024.10.003","DOIUrl":"10.1016/j.rcar.2024.10.003","url":null,"abstract":"<div><div>The significance of land use classification has garnered attention due to its implications for climate and ecosystems. This paper establishes a connection by introducing and applying automatic machine learning (Auto ML) techniques to salt lake landscape, with a specific focus on the Qarhan Salt Lake area. Utilizing Landsat-5 Thematic Mappe (TM) and Landsat-8 Operational Land Imager (OLI) imagery, six machine learning algorithms were employed to classify eight land use types from 2000 to 2020. Results show that XGBLD performed optimally with 77% accuracy. Over two decades, salt fields, construction land, and water areas increased due to transformations in saline land and salt flats. The exposed lakes area exhibited a rise followed by a decline, mainly transforming into salt flats. Agricultural land areas slightly increased, influenced by both human activities and climate. Our analysis reveals a strong correlation between salt fields and precipitation, while exposed lakes demonstrate a significant negative correlation with evaporation and temperature, highlighting their vulnerability to climate change. Additionally, human water usage was identified as a significant factor impacting land use change, emphasizing the dual influence of anthropogenic activities and natural factors. This paper addresses the void in the application of Auto ML in salt lake environments and provides valuable insights into the dynamic evolution of land use types in the Qarhan Salt Lake region.</div></div>","PeriodicalId":53163,"journal":{"name":"Research in Cold and Arid Regions","volume":"16 5","pages":"Pages 239-249"},"PeriodicalIF":0.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}