Article
Forestry
Jianfeng Peng, Jinbao Li, Jingru Li, Teng Li
Summary: This paper presents a robust reconstruction of winter minimum temperatures in Southwest China based on tree rings spanning 250 years. The reconstruction shows five warm periods and four cold periods over the past 250 years, and reveals significant interannual and interdecadal cycles. Spatial correlation analysis and comparison with other paleoclimate records indicate a significant positive correlation with the Atlantic Multidecadal Oscillation.
Article
Biophysics
Yangao Jiang, Yuting Cao, Junhui Zhang, Zhuo Li, Guoqiang Shi, Shijie Han, Cassius E. O. Coombs, Chuan Liu, Xiaoguang Wang, Junwei Wang, Lin Hao, Qi Xu, Haisheng He
Summary: Through analyzing tree-ring data and climate records, a reconstructed August-September mean maximum temperature (T-89) series in the northeastern forest area of Inner Mongolia was developed, showing latitude differences in warm months warming up in northeast China. This study enriches high-resolution temperature series in Northeast China and helps clarify the characteristic of recent warming in northeast China.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2021)
Article
Environmental Sciences
Irina P. Panyushkina, David M. Meko, Alexander Shiklomanov, Richard D. Thaxton, Vladimir Myglan, Valentin V. Barinov, Anna Taynik
Summary: The Yenisei River is the largest contributor of freshwater and energy fluxes to the Arctic Ocean. Tree-ring width can be used to reconstruct variations in Yenisei River discharge. In the past 25 years, there has been a significant increase in winter flow, raising concerns about the potential impacts of Arctic Amplification.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Forestry
Yeshey Khandu, Anan Polthanee, Supat Isarangkool Na Ayutthaya
Summary: The Himalayan region is at risk of climate change due to its high rate of change. However, there is a lack of high-resolution paleoclimate reconstructions. By studying tree-ring data, it was found that there is a warming trend with a pause period in Northern Bhutan.
Article
Meteorology & Atmospheric Sciences
Weipeng Yue, Feng Chen, Nicole K. Davi, Heli Zhang, Youping Chen, Xiaoen Zhao, Zhihong Gao
Summary: The distributions of forest, ice, and snow in the Hengduan Mountains of China have changed significantly due to ongoing climatic warming. By analyzing tree-ring cores, researchers have reconstructed the temperature changes in the region and identified the occurrence of the Little Ice Age in the Western Hengduan Mountains. The study also indicates that air-sea interactions and solar activity play a role in the interannual and interdecadal variations of warm-season mean temperature.
Article
Forestry
Wentai Liu, Qiang Li, Huiming Song, Ruolan Deng, Yu Liu
Summary: Climate change has a significant impact on environmental evolution in arid and semi-arid regions, affecting physiological functions of plants and water-carbon exchange. Analysis of delta O-18 series in the Ordos region reconstructs VP variations for the past 205 years, showing that VP is mainly influenced by precipitation and has no significant correlation with temperature. Recent decrease in VP may be related to weakening Asian monsoon.
Article
Water Resources
Xiaoen Zhao, Ruibo Zhang, Feng Chen, Bagila Maisupova, Vitaliy Kirillov, Bulkair Mambetov, Shulong Yu, Qing He, Daniyar Dosmanbetov, Nurzhan Kelgenbayev
Summary: In this study, an ensemble reconstruction of June-July streamflow from the Ishim-Tobol River was performed using random forest, K-nearest neighbor, and multiple linear regression models. The reliability of the reconstruction was verified through comparisons with other regional reconstructions and historical records. The study found that atmospheric circulation significantly influenced the study area, and the reconstructed streamflow indicated prolonged periods of below-average conditions, highlighting drought and water deficit within the basin. Water vapor transport played a significant role in this phenomenon.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Geosciences, Multidisciplinary
Miao Song, Bao Yang, Fredrik Charpentier Ljungqvist, Feng Shi, Chun Qin, Jianglin Wang
Summary: This study presents a reconstruction of winter temperatures in East Asia based on tree-ring records, revealing a significant long-term warming trend associated with solar insolation and anthropogenic impact. The magnitude and rate of winter temperature change were found to be much greater than that of summer temperatures, with climate model simulations supporting the reconstruction. The results also suggest possible influences of volcanic eruptions and solar insolation on winter temperatures.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Karen J. Heeter, Maegen L. Rochner, Grant L. Harley
Summary: By analyzing the late-summer maximum air temperature changes in the Greater Yellowstone Ecoregion over the past 1250 years, it was found that 2016 was the warmest year and the warming trend since 2000 was the most intense. The Medieval Climate Anomaly contained the warmest event from 1050-1070 CE, characterized by substantial multidecadal variability rather than prolonged, homogeneous warming. Summer temperature variability across the GYE shows multicentennial agreement with trends in solar irradiance, volcanic activity, snowpack, and other regional-to-hemispheric temperature records.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Elise Parey, Alexandra Louis, Jerome Montfort, Olivier Bouchez, Celine Roques, Carole Iampietro, Jerome Lluch, Adrien Castinel, Cecile Donnadieu, Thomas Desvignes, Christabel Floi Bucao, Elodie Jouanno, Ming Wen, Sahar Mejri, Ron Dirks, Hans Jansen, Christiaan Henkel, Wei-Jen Chen, Margot Zahm, Cedric Cabau, Christophe Klopp, Andrew Thompson, Marc Robinson-Rechavi, Ingo Braasch, Guillaume Lecointre, Julien Bobe, John H. Postlethwait, Camille Berthelot, Hugues Roest Crollius, Yann Guiguen
Summary: Through the study of gene sequence and chromosomal rearrangement in teleosts, it was found that Elopomorpha and Osteoglossomorpha are sister groups to all other teleosts, resolving over 50 years of controversy on their evolutionary relationships.
Article
Forestry
Wenxuan Pang, Qiang Li, Yu Liu, Huiming Song, Changfeng Sun, Jiachuan Wang, Yalan Yan, Qiufang Cai, Meng Ren
Summary: The Altay Mountains in Central Asia receive abundant precipitation and serve as an important transportation route between Asia and Europe. Previous studies focused on temperature changes rather than precipitation variations. In this study, we reconstructed 404 years of precipitation based on tree rings, which explained a significant portion of the precipitation variance. The reconstruction identified severe drought events that matched historical records and showed a potential link between precipitation variations and ENSO and NAO.
Article
Remote Sensing
Yinghao Sun, Teng Fei, Yonghong Zheng, Yonggai Zhuang, Lingjun Wang, Meng Bian
Summary: This study examines the potential of hyperspectral indices in dendroclimatology research, comparing them to traditional tree ring width indices. The results show that hyperspectral indices outperform traditional indices in terms of chronology statistics and reconstruction accuracy, making them more suitable for climate reconstruction purposes.
GEO-SPATIAL INFORMATION SCIENCE
(2023)
Article
Forestry
Liliana V. Belokopytova, Dina F. Zhirnova, David M. Meko, Elena A. Babushkina, Eugene A. Vaganov, Konstantin V. Krutovsky
Summary: The study in southern Siberia analyzed data from meteorological stations and found that soil temperature has an influence on tree-ring width, with the correlation varying depending on soil depth. The highest correlation between tree-ring width and soil temperature was found at a depth of 40 cm.
Article
Geography, Physical
Yun-Li Yin, Zaw Zaw, Xin-Hua Peng, Hui Zhang, Pei-Li Fu, Wen-Li Wang, Achim Braeuning, Ze-Xin Fan
Summary: High-resolution paleoclimate proxy records are lacking in southwest China's subtropical region. In this study, we constructed a tree ring-width chronology of Tsuga dumosa in central Yunnan Province to gain insights into hydroclimate variability. Our reconstruction of the March-June Standardized Precipitation-Evapotranspiration Index (SPEI) from 1826 to 2020 CE showed inter-annual to inter-decadal variations and an increasing occurrence of severe dry or wet events in recent years. The high frequency cycle of 2-8 years in our drought reconstruction series captures hydrological signals over a larger area.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Environmental Sciences
Dan Li
Summary: Scientists have discovered a phenomenon in tree growth where annual rings are missing during large volcano eruptions, which provides important insights for dendro-reconstruction research.
Article
Environmental Sciences
Philip A. White, C. Shane Reese, William F. Christensen, Summer Rupper
Article
Multidisciplinary Sciences
J. M. Maurer, J. M. Schaefer, J. B. Russell, S. Rupper, N. Wangdi, A. E. Putnam, N. Young
Article
Geochemistry & Geophysics
Durban G. Keeler, Summer B. Rupper, Richard Forster, Clement Miege
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2020)
Article
Environmental Sciences
Collin Riley, Summer Rupper, James W. Steenburgh, Courtenay Strong, Adam K. Kochanski, Savanna Wolvin
Summary: The research compares precipitation characteristics between regions dominated by the Indian Summer Monsoon and westerly disturbances during the cool season, revealing a more complex spatial pattern than previous studies. Precipitation is tightly coupled with integrated vapor transport in both regions, but with variations in direction and precipitation peaks.
Article
Geography, Physical
George H. Denton, Aaron E. Putnam, Joellen L. Russell, David J. A. Barrell, Joerg M. Schaefer, Michael R. Kaplan, Peter D. Strand
Summary: The study addresses two fundamental questions about the ice-age climate system from a Southern Hemisphere perspective, with a focus on the last glacial termination and its climate elements. By studying mountain glaciers in the Southern Alps and southern Andes, researchers revealed possible causes and characteristics of the last glacial termination. The findings suggest a global warming episode during the last ice age, with a hypothesis involving a shift in Southern Ocean circulation and austral westerly wind system.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Ananta P. Gajurel, Mary S. Hubbard, Bibek Giri, Aurora C. Elmore, Sanjeet Maka, Patrick A. Rafter, Aaron E. Putnam, Sandra Elvin, Alex Tait, Paul A. Mayewski
Summary: The research on the Taboche Lake core in the Everest region reveals geological records of past earthquakes and environmental changes over the past 1600 years, providing important information for future earthquake hazard assessment and glacial lake flood risk evaluation.
Article
Statistics & Probability
Philip A. White, Durban G. Keeler, Summer Rupper
Summary: The article introduces a new method to estimate snow density in Antarctica, as well as analyzes the trend of water accumulation. Through interpolation, snow density can be estimated in regions where snow cores have not been drilled, and it has been found that water accumulation has mainly decreased in recent decades.
ANNALS OF APPLIED STATISTICS
(2021)
Article
Geochemistry & Geophysics
Durban G. Keeler, Summer Rupper, Richard Forster
Summary: Ice-penetrating radar can be used to reconstruct temporally stable annually resolved SMB time series, even when data collection is separated by several years.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Environmental Sciences
Philip A. White, Durban G. Keeler, Daniel Sheanshang, Summer Rupper
Summary: Snow density estimation is crucial for understanding climate processes and evaluating water accumulation trends. However, traditional linear models may fail to capture important data features. In this study, we propose a spatially and functionally smoothed snow density model that better fits the data while preserving inference on physical parameters.
Article
Geosciences, Multidisciplinary
Morgan McDonnell, Summer Rupper, Richard Forster
Summary: Southern Andean glaciers have a significant impact on global sea-level rise. However, limited mass balance estimates prior to 2000 hinder our understanding of glacier mass changes over time. Using historical imagery and elevation data, we estimated the geodetic mass balance of the Northern Patagonian Icefield and the Southern Patagonian Icefield. Our findings indicate an acceleration of ice loss in the 21st century compared to the 1976/1979-2000 period, highlighting the importance of this study.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Alexandra Giese, Summer Rupper, Durban Keeler, Eric Johnson, Richard Forster
Summary: This study explores the contribution of glacier melt to the Indus River basin, finding that the northern subbasins in the Karakoram Range provide most of the glacier meltwater. Regional application of the model allows an assessment of the dominant drivers of melt and their spatial distributions.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Biology
Lynsie R. Warr, Matthew J. Heaton, William F. Christensen, Philip A. White, Summer B. Rupper
Summary: The high mountain regions of Asia have significant amounts of glacial ice, which is crucial for providing fresh water to the population living in the Indus watershed region. This research develops a spatially varying mixture model to compare climate models with observational data and validate their accuracy.
JOURNAL OF AGRICULTURAL BIOLOGICAL AND ENVIRONMENTAL STATISTICS
(2023)
Article
Geography, Physical
George H. Denton, Samuel Toucanne, Aaron E. Putnam, David J. A. Barrell, Joellen L. Russell
Summary: Climate oscillations of the last ice age in Greenland and Antarctic ice cores did not always vary in unison. Antarctic warming episodes during Heinrich events in the North Atlantic suggest a need for an alternative hypothesis to explain such anti-phasing. The bipolar seesaw mechanism may not fully account for the observed phasing differences.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Durban G. Keeler, Summer Rupper, Joerg M. Schaefer
Summary: Alpine glaciers are important tools for investigating climate changes and water resources globally. A glacier model detailed here estimates equilibrium line altitudes using limited bed topography measurements, with uncertainty bounds generated through Monte Carlo sampling and bootstrapping.
Article
Geography, Physical
Matthew Olson, Summer Rupper