Revealing the scale- and location-specific relationship between soil organic carbon and environmental factors in China's north-south transition zone

Tian, Huiwen; Zhang, Junhua; Zhu, Lianqi; Qin, Jingting; Liu, Man; Shi, Jiaqi; Li, Guodong

doi:10.1016/j.geoderma.2021.115600

Cited by 18 publications

(13 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The topography in this area is complex and varied, featuring significant undulations. The average yearly precipitation decreases from south to north, with winter being cold and dry, summers marked by periods of drought and rain, dry spring seasons and humid autumn months (Tian et al, 2022). The Qingling‐Daba Mountains region indicates the demarcation lines of both 800–1000 mm annual precipitation and 400–500 summer precipitation (Lu & Lu, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…As compared to traditional multivariate empirical mode decomposition (MEMD) and multiple spectral coherence (MSC), MWC can effectively find an optimal combination of factors that explain the temporal variation of the target variable over multiscale location domains (Nalley et al, 2019). MWC is widely used in various research fields (Das & Kumar, 2018; Tian et al, 2022; Zhu et al, 2021). Given the current deficiencies in research of s‐DFAA events, the objective of this study is to propose a revised SDFAI (R‐SDFAI) that considers customizable drought standards.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatiotemporal variation and multivariate controls of short‐cycle drought–flood abrupt alteration: A case in the Qinling‐Daba Mountains of China

Song¹,

Lei²,

Ma³

et al. 2023

Intl Journal of Climatology

View full text Add to dashboard Cite

A comprehensive understanding of the patterns of drought and flood alternation in adjacent months is essential for enabling climate adaptation and mitigation strategies. However, there is a paucity of knowledge regarding short‐cycle drought–flood abrupt alteration (s‐DFAA) and its responses to multiple environmental factors at various timescales. This is because of the inadequate formula construction of the existing short‐cycle drought–flood abrupt alteration index (SDFAI), such as the inability to introduce drought standards. To accurately capture the s‐DFAA's characteristics in the Qinling‐Daba Mountains (Qinba Mountains), we proposed a revised SDFAI (R‐SDFAI), which incorporates the standardized precipitation index (SPI) and allows for the customization of drought standards. Next, we used wavelet transform coherence and multiple wavelet coherence to investigate the timescale relationships between s‐DFAA events and their influence factors such as relative humidity, sunshine duration, temperature, evaporation, Arctic Oscillation (AO), Niño3.4 SSTA Index (Niño3.4), Total Sunspot Number Index (TSNI) and Pacific Decadal Oscillation Index (PDO). Our results showed that the R‐SDFAI outperformed traditional SDFAI in capturing s‐DFAA events and characterizing their severity. Furthermore, s‐DFAA events identified by R‐SDFAI at different levels (i.e., mild, moderate, severe, extreme and total) displayed insignificant downward trends. Spatially, there were more s‐DFAA events in the east than the west. Wavelet analysis indicated that meteorological factors and teleconnections significantly impact s‐DFAA events at large timescales, though their driving mechanisms differed substantially. Among meteorological factors, single relative humidity and its related combinations exhibited relatively high percent area of significant coherence (PASC, ranging from 17.47 to 29.46). Each teleconnection and its combinations are irreplaceable, with PASC values always increasing with the number of variables. The PASC ranges from 8.3 to 10.29 for one factor, 12.38 to 18.65 for two factors, 24.02 to 30.58 for three factors and 40.88 for four factors, respectively.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation and multivariate controls of short‐cycle drought–flood abrupt alteration: A case in the Qinling‐Daba Mountains of China

Song¹,

Lei²,

Ma³

et al. 2023

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…The terrain in this region is complicated and diverse, exhibiting significant undulations. Average annual precipitation decreases from south to north, with cold and dry winter conditions, summers characterized by periods of drought and rain, dry spring seasons, and humid autumn months (Tian et al, 2022). The Qingling-Daba Mountains region is evidenced the demarcation lines of both 800~1000 mm annual precipitation and 400~500 summer precipitation (Lu and Lu, 2019).…”

Section: Study Area and Datamentioning

confidence: 99%

Spatiotemporal variation and multivariate controls of short-cycle drought-flood abrupt alteration in China’s north-south transitional zone

lei

Song

et al. 2022

Preprint

View full text Add to dashboard Cite

A full knowledge of the alteration patterns of drought and flood in adjacent months is crucial to facilitate climate adaptation and mitigation strategies. However, the exploring of short-cycle drought-flood abrupt alteration (s-DFAA) and its multi-scale responses to multiple environmental factors remains poorly understood due to insufficient formula construction (e.g., drought standards cannot be introduced) of the existing short-cycle drought-flood abrupt alternation index (SDFAI). In this study, we proposed a new short-cycle drought-wetness abrupt alternation index (SDWAI) allowing to customize drought standards and applied which to China’s north-south transition zone. The multi-scale relationships (i.e. small scales (<4 years), medium scales (4-8 years), large scales (>8years) and all scales) between the s-DFAA(SDWAI) and its pertinent factors (i.e., precipitation, relative humidity, sunshine duration, temperature, evaporation; Arctic Oscillation, AO; NINO 3.4 SSTA Index, NINO3.4; Total Sunspot Number Index, TSNI; Pacific Decadal Oscillation Index, PDO) were further investigated using the wavelet transform coherence and multiple wavelet coherence. Results showed that the SDWAI outperformed the traditional one. Different-level s-DFAA events(i.e., mild, moderate, severe, extreme and total) identified by SDWAI exhibited insignificant downward trends. Spatially, there were more s-DFAA events in the east than the west. Among the single and multiple meteorological elements, precipitaion was the dominant factor influencing the SDWAI, with the highest percent area of significant coherence (PASC) at different scales. Each teleconnection and their combinations, which were irreplaceable, had the most siginificant influence on SDWAI at large scales where TSNI and NINO3.4 that contributed higher PASC were substantiated the predominant roles.

show abstract

“…The mass elevation effect (MEE), a phenomenon that shows the distribution boundary of internal similar vegetation, is higher than that of peripheral isolated mountains, and this occurs widely in large mountains and plateaus (Grubb, 1971;Holtmeier, 2009;Zhao et al, 2014;Zhao et al, 2015). It not only changes and destroys the horizontal zonality but also shapes the non-zonality of vegetation and climate distribution in mountainous areas (Zhang and Yao, 2016) and has become a hot (Han, 2011a;Yao and Zhang, 2012;Zhao et al, 2014;Zhao et al, 2015;Zhang and Yao, 2016;Han et al, 2018;Zhao et al, 2021;Tian et al, 2022). The mountain base elevation (MBE), which is closely related to MEE, is the key topographic factor for the MEE (Han, 2011a;Han et al, 2012;Zhao et al, 2014;Zhao et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, the extraction of the MBE is considered helpful to explain the structure and distribution of mountain altitudinal belts. However, traditionally, the mountain base belt and MBE are mostly obtained by manual means (Hou, 1981;Liu, 1981;Zhao et al, 2014;Tian et al, 2022), which is not only inefficient but also inaccurate because of the lack of scientific standard and the existence of subjectivity. With the development of modern Earth observation technology and GIS technology (Zhu et al, 2021), especially with the development and application of the digital elevation model (DEM) data, the automatic quantification of the MBE becomes feasible.…”

Section: Introductionmentioning

confidence: 99%

The quantification of mountain base elevation based on mountain structure modeling

Zhang

Mengyang²,

Chen³

et al. 2022

Front. Environ. Sci.

View full text Add to dashboard Cite

The mountain base elevation, which refers to the initial altitude of a mountain or the mountain altitudinal belt, is of great significance for the study of mountain altitudinal zonality and the mass elevation effect. However, a fast and efficient algorithm for the automatic extraction of a mountain base elevation is still lacking; therefore, a new method based on mountain structure modeling to calculate the mountain base elevation is proposed for the Qinling-Daba Mountains (QDM). The result shows that 1) the mountain structures in different catchments of the Qinling-Daba Mountains can be divided into six types, namely, pyramid, low-diamond, diamond, inverse pyramid, hourglass, and ellipsoid, and each type has a specific distribution law; 2) based on the mountain structure, the calculation result of the mountain base elevation in the Qinling-Daba Mountains ranges from 99 m to 3,979 m, being high in the west, north, and south and low in the east and middle, which is consistent with the overall terrain distribution of the Qinling-Daba Mountains; and 3) there is a good linear correlation between the mountain base elevation and the average altitude in the Qinling-Daba Mountains with R2 = 0.96 (p < 0.01), which also indicates that the mountain base elevation quantification algorithm works well in the mountain areas with a complex terrain.

show abstract

Revealing the scale- and location-specific relationship between soil organic carbon and environmental factors in China's north-south transition zone

Cited by 18 publications

References 69 publications

Spatiotemporal variation and multivariate controls of short‐cycle drought–flood abrupt alteration: A case in the Qinling‐Daba Mountains of China

Spatiotemporal variation and multivariate controls of short‐cycle drought–flood abrupt alteration: A case in the Qinling‐Daba Mountains of China

Spatiotemporal variation and multivariate controls of short-cycle drought-flood abrupt alteration in China’s north-south transitional zone

The quantification of mountain base elevation based on mountain structure modeling

Contact Info

Product

Resources

About