Assessing the relation of tree ring width with climate variables in South Korea through multi-gridded dataset

2021 ◽  
Author(s):  
Nasrin Salehnia ◽  
Jinho Ahn
Keyword(s):  
Tree Ring ◽  
Potential Evapotranspiration ◽  
Regression Line ◽  
Ring Width ◽  
Climatic Research Unit ◽  
P Value ◽  
Climate Variables ◽  
Tree Ring Width ◽  
Significance Level ◽  
The Past

<p>The Tree Ring Width (TRW) records are one of the main paleoclimate proxies that estimate the past climate variability. TRW measurements pave the way for scientists to produce sequences from various kinds of trees and reconstruct climate variables over the past years. Understanding the relation between TRW and climate variables in the past would help us analyze climate change events. This study has applied multi-gridded datasets to find the relations and model TRW data with different climate variables in South Korea's northeast. We utilized TRW data related to our case study that is available on the NOAA website; furthermore, we have checked three primary gauges, namely Agmerra (The Modern-Era Retrospective Analysis for Research and Applications), CRU TS4.03 (Climatic Research Unit Time-Series version 4.03), and APHRODITE's (Asian Precipitation-Highly-Resolved Observational Data Integration Towards Evaluation) for climate variables. In the first step, we have checked the relation between the gauges' precipitation data and observation TRW. According to the obtained efficiency criteria, CRU performed the best consequences. In the second step, we have tried to model observation TRW as a dependent variable and four climate variables of CRU (precipitation, minimum temperature, potential evapotranspiration, and diurnal temperature range) as independent ones over 1969-1998. We have created a linear regression model and determined the accurate coefficients for each climate variable. Besides, we have examined the observation TRW and modeled TRW data. The results showed that with <em>R<sup>2 </sup></em><sup> </sup>≈ 0.40 and a <em>p-value</em> of 0.0323, the regression line was linearly significant at the 95 percent significance level. It represents that our model is acceptable. We will extend our model with Artificial Intelligence methods and try to apply other TRW stations in the future step. In this way, we may produce highly accurate models and fill the gaps for future researches.</p>

Reconstruction of potential evapotranspiration over western Himalaya in India based on tree ring-width records

2020 ◽  
Vol 547 ◽  
pp. 145-151 ◽  
Author(s):  
Somaru Ram ◽  
H.N. Singh ◽  
Ramesh Kumar Yadav ◽  
S.S. Nandargi ◽  
Manoj K. Srivastava
Keyword(s):  
Tree Ring ◽  
Potential Evapotranspiration ◽  
Ring Width ◽  
Western Himalaya ◽  
Tree Ring Width

Reconstruction of Past Erosional Force from Tree Ring Information around the Rokko Mountains, Japan

1990 ◽  
Vol 34 (2) ◽  
pp. 240-248 ◽  
Author(s):  
Kenji Kashiwaya ◽  
Takashi Okimura
Keyword(s):  
Tree Ring ◽  
Debris Flows ◽  
Ring Width ◽  
Tree Ring Width ◽  
Mountain Areas ◽  
Rainfall Events ◽  
The Past ◽  
The North ◽  
First Approximation ◽  
Landslides And Debris Flows

AbstractTorrential rainfalls in the Rokko Mountains have often triggered severe landslides and debris flows, but few such phenomena have occurred in the area just to the north of the mountains during the same rainfall events. The periodicity of 25–30 years in excess rainfall data (i.e., the annual summation of heavy rainfall of more than 100 mm/day during the past 100 years) around the mountains correlates with the increased frequency of landslides and debris flows. Analyses of tree-ring widths that span the past 50–240 years in samples taken from various areas in the mountains and the area just to the north indicate that most sequences have a dominant periodicity of about 25–30 years, the ring series in the mountain areas having a more conspicuous periodicity than those from the area just to the north. These results lead to the conclusion that excess rainfall may provide a first approximation of erosional force in areas affected by slope movement, and that tree-ring width may be used as a proxy for erosional force.

Subalpine forest dynamics reconstructed throughout the last 700 years in the Central Pyrenees by means of tree rings and pollen

The Holocene ◽  
2018 ◽  
Vol 29 (2) ◽  
pp. 300-312
Author(s):  
Sandra Garcés-Pastor ◽  
Emilia Gutiérrez-Merino ◽  
Elisabet Martínez-Sancho ◽  
Isabel Dorado-Liñán ◽  
J Julio Camarero ◽  
...  
Keyword(s):  
Tree Ring ◽  
Low Temperatures ◽  
Ring Width ◽  
Forest Growth ◽  
Subalpine Forest ◽  
Pollen Record ◽  
Tree Ring Width ◽  
Growth Variability ◽  
The Past ◽  
Central Pyrenees

Understanding how climate has modulated forest growth and composition in the past is necessary to predict the influence of the ongoing climate warming on the dynamics of mountain forests. We studied the past dynamics of subalpine Pyrenean forests during the last 700 years by assessing the relationships between sedimentary pollen and tree-ring records, and their link with climatic drivers. We compared the pollen record and the montane pollen ratio, an integrative index obtained from sedimentary pollen that allows inferring past altitudinal variations in the montane–subalpine ecotone, with tree-ring width from mountain pine ( Pinus uncinata) subalpine forests located in Central Pyrenees. To assess climate–growth associations, we related the dendrochronological data with instrumental meteorological records (1901–2010) and temperature reconstructions from the Pyrenees and Northern Hemisphere. Few robust associations were found between arboreal pollen taxa and tree-ring width series of the surrounding forests. However, significant correlations were found between the montane pollen ratio and tree-ring width series from nearby forests (located less than 10 km apart). This relationship could be potentially useful to infer long-term forest growth changes at decadal to centennial scales using the montane pollen ratio. On the contrary, our results show that tree radial growth has mainly been constrained by low temperatures although the growth sensitivity to climate has considerably varied over the last 700 years. Similar results were obtained for the last century as growth variability of these high-elevation forests is still driven by low temperatures, but a relaxation of this constrain in recent decades has been detected.

scholarly journals Precipitation reconstruction based on tree-ring width over the past 270 years in the central Lesser Khingan Mountains, Northeast China

2020 ◽  
Author(s):  
Mingqi Li ◽  
Guofu Deng ◽  
Xuemei Shao ◽  
Zhi-Yong Yin
Keyword(s):  
Tree Ring ◽  
Northeast China ◽  
Large Scale ◽  
Ring Width ◽  
The Arctic ◽  
Pinus Koraiensis ◽  
Tree Ring Width ◽  
Precipitation Reconstruction ◽  
The Past ◽  
Decadal Scale

Abstract. Inter-annual variations in precipitation play important roles in management of forest ecosystems and agricultural production in Northeast China. This study presents a 270-year precipitation reconstruction of winter to early growing season for the central Lesser Khingan Mountains, Northeast China based on tree-ring width data from 99 tree-ring cores of Pinus koraiensis Sieb. et Zucc. from two sampling sites near Yichun. The reconstruction explained 43.9 % of the variance in precipitation from the previous October to current June during the calibration period 1956–2017. At the decadal scale, we identified four dry periods that occurred during AD 1748–1759, 1774–1786, 1881–1886 and 1918–1924, and four wet periods occurring during AD 1790–1795, 1818–1824, 1852–1859 and 2008–2017, and the period AD 2008–2017 was the wettest in the past 270 years. Power spectral analysis and wavelet analysis revealed cyclic patterns on the inter-annual (2–3 years) and inter-decadal (~11 and ~32–60 years) timescales in the reconstructed series, which may be associated with the large-scale circulation patterns such as the Arctic Oscillation and North Atlantic Oscillation through their impacts on the Asian polar vortex intensity, as well as the solar activity.

Tree-ring-width-based PDSI reconstruction for central Inner Mongolia, China over the past 333 years

2016 ◽  
Vol 48 (3-4) ◽  
pp. 867-879 ◽  
Author(s):  
Yu Liu ◽  
Xinjia Zhang ◽  
Huiming Song ◽  
Qiufang Cai ◽  
Qiang Li ◽  
...  
Keyword(s):  
Tree Ring ◽  
Inner Mongolia ◽  
Ring Width ◽  
Tree Ring Width ◽  
The Past ◽  
Pdsi Reconstruction

scholarly journals Tree-Ring Analysis Reveals Density-Dependent Vulnerability to Drought in Planted Mongolian Pines

Forests ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 98
Author(s):  
ShouJia Sun ◽  
Shuai Lei ◽  
HanSen Jia ◽  
Chunyou Li ◽  
JinSong Zhang ◽  
...  
Keyword(s):  
Tree Ring ◽  
Radial Growth ◽  
Potential Evapotranspiration ◽  
Pearson Correlation ◽  
Ring Width ◽  
Stand Density ◽  
Severe Drought ◽  
Drought Event ◽  
Tree Ring Width ◽  
Tree Ring Data

Population density influences tree responses to environmental stresses, such as drought and high temperature. Prolonged drought negatively affects the health of Mongolian pines in forests planted by the Three-North Shelter Forest Program in North China. To understand the relationship between stand density and drought-induced forest decline, and to generate information regarding the development of future management strategies, we analyzed the vulnerability to drought of planted Mongolian pines at three stand densities. A tree-ring width index for trees from each density was established from tree-ring data covering the period 1988–2018 and was compared for differences in radial growth. Resistance (Rt), recovery (Rc), resilience (Rs), and relative resilience (RRs) in response to drought events were calculated from the smoothed basal area increment (BAI) curves. The high-density (HDT) group showed a consistently lower tree-ring width than the border trees (BT) and low-density (LDT) groups. The BAI curve of the HDT group started to decrease five years earlier than the LDT and BT groups. Pearson correlation analysis revealed that the radial growth of all of the groups was related to precipitation, relative humidity (RH), potential evapotranspiration (ET0), and standardized precipitation evapotranspiration index (SPEI) in the previous October and the most recent July, indicating that Mongolian pine trees of different densities had similar growth–climate relationships. Over the three decades, the trees experienced three severe drought events, each causing reduced tree-ring width and BAI. All of the groups showed similar Rc to each drought event, but the HDT group exhibited significantly lower Rt, Rs, and RRs than the BT group, suggesting that the HDT trees were more vulnerable to repeated drought stress. The RRs of the HDT group decreased progressively after each drought event and attained <0 after the third event. All of the groups showed similar trends regarding water consumption under varying weather conditions, but the HDT group showed significantly reduced whole-tree hydraulic capability compared with the other two groups. From these results, HDT trees exhibit ecophysiological memory effects from successive droughts, including sap flux dysfunction and higher competition index, which may prevent recovery of pre-drought growth rates. HDT trees may be at greater risk of mortality under future drought disturbance.

scholarly journals Tree-Ring Width And Its Interrelation With Environmental Parameters: Case Study In Central Hungary

2015 ◽  
Vol 8 (3-4) ◽  
pp. 53-59 ◽  
Author(s):  
Zsuzsanna Ladányi ◽  
Viktória Blanka
Keyword(s):  
Tree Ring ◽  
Water Availability ◽  
Water Scarcity ◽  
Robinia Pseudoacacia ◽  
Ring Width ◽  
Environmental Parameters ◽  
Tree Ring Width ◽  
The Past ◽  
Aridity Indices ◽  
The Impact

Abstract Tree ring width is influenced by several internal and external factors, among which climate became one of the most dominant due to the altering conditions and patterns of precipitation and temperature. The study aims to analyse the interrelationship between tree ring-width and the dominant environmental parameters in a landscape exposed to water scarcity in the past decades due to climate change and human interventions. Scots pine (Pinus sylvestris), black locust (Robinia pseudoacacia) and white poplar (Populus alba) plantations were sampled to reveal their exposure to climatic forcing and water scarcity (different water availability). Correlation and similarity analysis were carried out to compare the calculated ring-width indices to climatic parameters and aridity indices. Tree ring sensitivity was assessed to reveal the impact of water scarcity on yearly ring-growth. Spatial overlapping of significance levels and mean sensitivity with the hydrological changes of the past decades were evaluated to reveal presumable spatial differences of the investigated samples. In the study area (South Danube-Tisza Interfluve) droughts and the deep groundwater table had both impacts on tree growth. The spectacular decrease of ring-width corresponds to the drought years determined by the investigated aridity indices. The relationship between the climate parameters and the ring-widths varies spatially with the changing site conditions. The highest level of correlation coefficients was experienced in areas with the lowest level of water availability. Ring-width sensitivity assessments showed an increasing tendency of sensitivity when comparing the consecutive decades, except for samples with favorable water availability.

May–June drought reconstruction over the past 821 years on the south-central Tibetan Plateau derived from tree-ring width series

2018 ◽  
Vol 47 ◽  
pp. 48-57 ◽  
Author(s):  
Minhui He ◽  
Achim Bräuning ◽  
Jussi Grießinger ◽  
Philipp Hochreuther ◽  
Jakob Wernicke
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Ring Width ◽  
Tree Ring Width ◽  
The South ◽  
The Past ◽  
South Central ◽  
Central Tibetan Plateau ◽  
Drought Reconstruction
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