Wind speed reconstruction from a tree-ring difference index in northeastern Inner Mongolia

Fang, Keyan; Bai, Maowei; Azorín-Molina, César; Dong, Zhipeng; Camarero, J. Julio; Zhang, Peng; Zheng, Zhuangpeng; Zhao, Zheng; Chen, Deliang

doi:10.1016/j.dendro.2022.125938

Cited by 10 publications

(5 citation statements)

References 40 publications

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“…Land use, meteorological factors, and vegetation cover are the key drivers of soil erosion pattern change (Zhu et al, 2021). In the past four decades, the slower wind speeds (Fang et al, 2022) and increased vegetation cover (Zhang et al, 2018) have collectively led to a decrease in wind erosion area. Although agricultural Frontiers in Earth Science frontiersin.org development may pose a risk of soil erosion, the intensity of soil erosion can be effectively reduced by planting trees around agricultural land, as shown in Figure 4 (a2).…”

Section: Discussionmentioning

confidence: 99%

Satellite observations reveal decreasing soil erosion in Northeast Inner Mongolia, China, over the past four decades

et al. 2022

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Knowledge regarding the soil erosion change patterns in Northeast Inner Mongolia (NIM) is essential for ecological security and sustainable development. Multisource satellite remote sensing with auxiliary data, including meteorology, land use, vegetation coverage, and digital elevation, was collected to establish a distributed soil erosion model to quantify the soil erosion intensity in Northeast Inner Mongolia. The results showed that soil erosion in Northeast Inner Mongolia, China, decreased by 100,654 km2 from 1978 to 2018. The area change rates of the mild, moderate, strong, intensive and severe soil erosion intensities were −48.91%, −41.41%, 32.63%, −91.15%, and −91.14%, respectively. The decrease in soil erosion was mainly located in the Hulunbuir and Tongliao regions. Our findings from satellite observations provide information about the soil erosion intensity and spatial distribution required for policy-making and the management of soil erosion prevention in Northeast Inner Mongolia.

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Section: Discussionmentioning

confidence: 99%

Satellite observations reveal decreasing soil erosion in Northeast Inner Mongolia, China, over the past four decades

et al. 2022

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“…Previous studies have used the difference of tree ring width between the opposite and compression sides (CW-OW) to quantify the effect of wind stress on trees (Fang et al, 2022a). This method extracts a composite signal that encompasses a prolonged growing season and increased growth rate, operating under the premise that xylem production is co-regulated by the duration of the growing season and the growth rate (Rossi et al, 2012;10.3389/ffgc.202310.3389/ffgc.…”

Section: Differences In Wood Production Between Ow and Cwmentioning

confidence: 99%

“…The reconstruction of mechanical stress relies on the asymmetric growth of the stem, which typically indicates the timing and strength of the stem eccentricity (Zhang et al, 2017;Fang et al, 2022a). For example, Fang et al (2022b) have proposed a method to reconstruct wind speed by analyzing shifts in the geometric center of tree rings.…”

Section: Introductionmentioning

confidence: 99%

Intra-annual dynamic of opposite and compression wood formation of Pinus massoniana Lamb. in humid subtropical China

Wang,

Zheng,

Zhou

et al. 2023

Front. For. Glob. Change

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Radial growth of trees can result in opposite wood (OW) and compression wood (CW) due to the varying impact of stem mechanical stress, such as that caused by gravity or wind. Previous research has identified higher xylem production in CW compared to OW. Yet, it remains unclear whether the difference in the number of xylem cells between OW and CW results from differences in growth rate or the duration of xylem cells. In this study, we collected wood microcores on a weekly basis from March 2019 to January 2020 in Pinus massoniana Lamb. located on a steep slope. Our objective was to compare the dynamic of cambial activity and resulting cellular anatomical parameters between OW and CW in a humid subtropical environment. Our results showed that the xylem phenology of OW and CW was generally consistent with the xylem cell division process beginning in early March and ceasing in November. The last latewood cell completed its differentiation at the end of December. The response of wood formation dynamics to climate was consistent in both OW and CW. Moreover, both wood types exhibited a limited development of the enlargement phase due to the heat and drought during the summer. The rate of cell division was responsible for 90.7% of the variability in the number of xylem cells. The CW xylem obtained a larger number of cells by increasing the rate of cell division and displayed thinner earlywood cells with larger lumens than OW cells. Our findings showed that the xylem of conifer species responds to mechanical stress by accelerating the cell division rate. As a result, we suggest calculating the ratio between OW and CW widths to reconstruct wind stress changes rather than calculating the residuals used in the current study.

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“…In the above linear equation b = XC, b is calculated by |r j (t) e iθ | 2 according to formula (7), and X is calculated by obtaining real and imaginary parts of r j (t) e iθ according to formula (6). So, when we measure r j (t) and θ for more than three tree-ring cores, we can solve C. That is, we obtain the center (A t , B t ) and radius (R t ) of the circumcircle of each year.…”

Section: Detection Of the Trgcmentioning

confidence: 99%

“…Tree rings are widely used as a proxy for temperature reconstruction of the past millennium, providing a crucial scientific foundation for global warming studies [1]. In addition, tree rings have been extensively utilized for reconstructing hydroclimate [2,3], internal climate variability [4,5], wind speed [6], and fire occurrences [7,8]. These broad applications take advantage of the accurate dating and rich environmental signals found in tree-ring proxies, such as tree-ring width, density, stable isotopes, and wood anatomy features [9,10].…”

Section: Introductionmentioning

confidence: 99%

An Alternative Method for Dating of Wildfire Occurrence from Tree-Ring Cores: A Case Study in Northeastern Asia

Mei,

Fang,

Yao

et al. 2023

Forests

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The tree-ring fire scar stands as a pivotal proxy for reconstructing historical wildfire occurrences, providing invaluable context for comprehending contemporary wildfire activities during the Anthropocene era. Precise identification of fire scars often necessitates sampling complete tree disks. Yet, stringent forest resource protection policies limit such collection in certain regions, thus curtailing the application of tree-ring-based fire reconstruction. While current methods based on tree-ring cores can ascertain the age range of fire events, pinpointing the exact year remains challenging. In this study, we propose a novel approach for detecting fire occurrence years by recognizing abrupt shifts in the tree-ring geometric center (TRGC). This method entails extracting a minimum of three tree-ring cores from the uninjured side of the tree and in proximity to the fire scar. We validated this method’s efficacy using samples from Transbaikal of Russia, in northeastern Asia, where fire years have already been documented. Our results show that this method accurately identified the fire year in nine fire scars with a 67 percent probability of exact agreement with the actual fire year. It is noteworthy that this method particularly excels in cases of trees with a single fire scar. We recommend employing the traditional method of collecting tree-ring cores near the fire scar to establish the age range of the fire scar. Subsequently, within this determined range, we suggest detecting the shifts in the TRGC to accurately pinpoint the exact year of the fire scar.

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Wind speed reconstruction from a tree-ring difference index in northeastern Inner Mongolia

Cited by 10 publications

References 40 publications

Satellite observations reveal decreasing soil erosion in Northeast Inner Mongolia, China, over the past four decades

Satellite observations reveal decreasing soil erosion in Northeast Inner Mongolia, China, over the past four decades

Intra-annual dynamic of opposite and compression wood formation of Pinus massoniana Lamb. in humid subtropical China

An Alternative Method for Dating of Wildfire Occurrence from Tree-Ring Cores: A Case Study in Northeastern Asia

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