Article
Geography, Physical
Akhilesh K. Yadava, Krishna G. Misra, Vikram Singh, Sandhya Misra, Yogesh K. Sharma, Bahadur S. Kotlia
Summary: A study using tree-ring data from Himalayan cedar developed a drought index that extends back to AD 1773, revealing long-term year-to-year and inter-decadal variations in the region, aiding in understanding the drought fluctuations in the area.
QUATERNARY INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Vikram Singh, Krishna G. Misra, Arun D. Singh, Ram R. Yadav, Akhilesh K. Yadava
Summary: The study of tree-ring chronologies in the north-western Himalaya reveals three distinct phases of precipitation changes during the Little Ice Age, indicating that the region did not experience any LIA influence before 1650.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Umar Farooq Jadoon, Baochun Huang, Syed Anjum Shah, Yasin Rahim, Ahsan Ali Khan, Asma Bibi
Summary: The India-Asia collision is a significant tectonic event in Earth's history, resulting in the uplift of the Himalayan-Tibetan orogen. This study provides paleomagnetic evidence for the timing and mechanism of the collision, suggesting multiple stages of collision involving subduction systems. The findings have implications for plate reconfigurations, global climate, and biodiversity.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Meteorology & Atmospheric Sciences
Anoop Kumar Singh, Santosh K. Shah, Uttam Pandey, Lamginsang Deeksha, Lamginsang Thomte, Tanveer W. Rahman, Nivedita Mehrotra, Dhruv Sen Singh, Bahadur Singh Kotlia
Summary: This study generated high-resolution temporal records from dendrochronological analysis on Cedrus deodara in the western Himalayan region. It found a significant positive relationship between the Normalized Difference Vegetation Index (NDVI) and tree-ring radial growth from April to July. The reconstruction of mean April-July NDVI variability since 1790 CE revealed consistent agreement with precipitation, drought records, and hydroclimatic reconstructions. The study also observed a correlation between NDVI browning and past droughts and famines. Comparisons with other datasets showed similarities in regional hydroclimatic scenarios over the last few centuries.
THEORETICAL AND APPLIED CLIMATOLOGY
(2023)
Article
Environmental Sciences
Toma Rani Saha, Pallav K. Shrestha, Oldrich Rakovec, Stephan Thober, Luis Samaniego
Summary: The study aims to develop a high spatial resolution system to mitigate the impact of agricultural drought in South Asia. By monitoring soil moisture conditions and assessing historical drought conditions, better management of drought can be achieved.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Tanupriya Rastogi, Jayendra Singh, Nilendu Singh, Pankaj Chauhan, Ram R. Yadav, Bindhyachal Pandey
Summary: In order to fill the data gap and understand the linkage between glacier and climate in the Himalayan region, a 231-year long temperature record was developed using the ring-width chronology of Himalayan fir. The reconstructed temperature record showed distinct periods of cold and warm phases, matching well with temperature records from neighboring regions and displaying a regional-scale climate signal. The record also revealed a negligible warming trend in the 20th century, followed by a spike in temperature rise in the 1990s, which is consistent with the Northern hemisphere temperature record. In addition, the temperature record from the glacier region showed a strong linkage with the winter mass balance of the benchmark Dokriani glacier.
QUATERNARY INTERNATIONAL
(2023)
Article
Environmental Sciences
Sang-Wook Yeh, Min-Seok Shin, Seung-Joo Ma, Jong-Seong Kug, Byung-Kwon Moon
Summary: To understand the global carbon cycle, it is crucial to examine the physical processes that control the current CO2 concentrations in East Asia. By analyzing the difference between East Asian and global CO2 concentrations, referred to as East Asian local CO2 concentration (EA_LCO2), we identified two key factors responsible for elevated CO2 concentrations in East Asia during the spring season. These factors include higher emissions in East Asia on long timescales and a cool sea surface temperature in the eastern tropical Pacific, which is associated with interannual higher CO2 concentration in East Asia.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Vikram Singh, Krishna G. Misra, Arun D. Singh, Ram R. Yadav
Summary: Droughts in the north-western Himalaya cause severe socioeconomic hardships. Limited short-term weather records have hindered our understanding of the temporal and spatial occurrence of these extreme droughts in a long-term perspective. To overcome this data gap, we developed a network of ring-width chronologies of Himalayan cedar. By analyzing moisture responsive ring-width chronologies, we found that droughts during the period of 1760s-2017 CE were more frequent and of larger magnitude compared to the earlier part of the reconstruction. Our SPI12-May record showed strong consistency with other tree-ring-based hydrological records from the western Himalaya. Spatial correlation analyses revealed a strong linkage between the SPI and Tropical Pacific Ocean surface temperature.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Geosciences, Multidisciplinary
Subhrendu Gangopadhyay, Connie A. Woodhouse, Gregory J. McCabe, Cody C. Routson, David M. Meko
Summary: The ongoing drought in the Upper Colorado River Basin has been found to be extremely severe, especially when compared to the tree-ring records from as early as 762 CE. Using gridded drought-atlas data and streamflow data, researchers have developed a streamflow reconstruction model for the Lees Ferry gage, revealing a second-century drought that surpasses the severity of the current drought and documented medieval period droughts. Limited data also support the occurrence of this exceptional second-century drought through analysis of individual tree-ring records and other paleoclimatic data.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Plant Sciences
Jingwen Yang, Qiuliang Zhang, Wenqi Song, Xu Zhang, Xiaochun Wang
Summary: Boreal forests are experiencing the most warming among all forest biomes, and drought caused by warming has a significant impact on species in these forests. However, little is known about the consistent response of tree and shrub growth in boreal forests to warming and drought. This study analyzed tree-ring width data from northeastern China and found that shrub growth may benefit more than trees in the future climate warming. These findings are important for predicting changes in ecosystem composition and species distribution in vulnerable areas under extreme climate conditions.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Kieran M. R. Hunt, A. P. Dimri
Summary: This study examines the impact of synoptic-scale circulations on landslides in the Upper Indus Basin. Winter landslides are primarily associated with extratropical western disturbances (WDs), while summer landslides are linked to tropical depressions (TDs). WDs provide moisture for large-scale precipitation, while TDs bring monsoonal southeasterlies to the region. Increased landslide frequency is correlated with the intensity of TDs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Jie Yuan, Zhenyu Yang, Chenglong Deng, Wout Krijgsman, Xiumian Hu, Shihu Li, Zhongshan Shen, Huafeng Qin, Wei An, Huaiyu He, Lin Ding, Zhengtang Guo, Rixiang Zhu
Summary: The study explores the history of the collision between India and Asia, providing new paleomagnetic data and suggesting a two-stage continental collision scenario.
NATIONAL SCIENCE REVIEW
(2021)
Article
Multidisciplinary Sciences
Rajesh Kumar, Shruti Singh, Atar Singh, Ramesh Kumar, Shaktiman Singh, Surjeet Singh Randhawa
Summary: By analyzing surface mass-balance measurements on Naradu Glacier in the western Himalayas, it was found that topographic features, temperatures, and precipitation are the main factors influencing glacial melting, with summer temperature having the greatest impact on surface mass balance variability.
SCIENTIFIC REPORTS
(2021)
Article
Geography, Physical
Shijie Wang, Wenmin Man, Feng Chen, Youping Chen, Shulong Yu, Honghua Cao, Mao Hu, Tiyuan Hou, Martin A. Hadad, Fidel A. Roig
Summary: Considerable advances have been made in dendroclimatic reconstruction in the eastern monsoon region of China in recent decades. Springtime precipitation has been identified as the main factor limiting the radial growth of pine trees in the Qinling-Bashan mountainous area. A precipitation reconstruction spanning 1760-2020 CE was developed based on tree ring chronologies in the southeast of Shaanxi Province. The reconstruction accounted for a significant portion of the total precipitation variance during the instrumental period. The analysis also revealed the impact of low precipitation on severe drought and locust plague events, and the correlation between the reconstructed precipitation and El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) variability.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Water Resources
Amiya Basak, A. T. M. Sakiur Rahman, Jayanta Das, Takahiro Hosono, Ozgur Kisi
Summary: Accurate drought forecasting is crucial for early warning and management of drought hazards. This study evaluated the performance of the Prophet model in meteorological drought forecasting and found that it outperformed traditional SVR and MLR models, making it a recommended robust model for drought forecasting.
HYDROLOGICAL SCIENCES JOURNAL
(2022)
Article
Geography, Physical
Rajesh Agnihotri, A. P. Dimri, H. M. Joshi, N. K. Verma, C. Sharma, J. Singh, Y. P. Sundriyal
Article
Geography, Physical
Vikram Singh, Ram R. Yadav, Anil K. Gupta, Bahadur S. Kotlia, Jayendra Singh, Akhilesh K. Yadava, Anoop K. Singh, Krishna G. Misra
QUATERNARY INTERNATIONAL
(2017)
Article
Geography, Physical
Akhilesh K. Yadava, Yogesh K. Sharma, Bhasha Dubey, Jayendra Singh, Vikram Singh, Mahendra R. Bhutiyani, Ram R. Yadav, Krishna G. Misra
QUATERNARY INTERNATIONAL
(2017)
Article
Agronomy
Mahmuda Islam, Mizanur Rahman, Achim Braeuning
AGRICULTURAL AND FOREST METEOROLOGY
(2019)
Article
Geography, Physical
Jayendra Singh, Nilendu Singh, Pankaj Chauhan, Ram R. Yadav, Achim Braeuning, Christoph Mayr, Tanupriya Rastogi
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Jayendra Singh, Ram R. Yadav, Pyar S. Negi, Tanupriya Rastogi
QUATERNARY INTERNATIONAL
(2020)
Article
Geography, Physical
Akhilesh K. Yadava, Krishna G. Misra, Vikram Singh, Sandhya Misra, Yogesh K. Sharma, Bahadur S. Kotlia
Summary: A study using tree-ring data from Himalayan cedar developed a drought index that extends back to AD 1773, revealing long-term year-to-year and inter-decadal variations in the region, aiding in understanding the drought fluctuations in the area.
QUATERNARY INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Vikram Singh, Krishna G. Misra, Arun D. Singh, Ram R. Yadav, Akhilesh K. Yadava
Summary: The study of tree-ring chronologies in the north-western Himalaya reveals three distinct phases of precipitation changes during the Little Ice Age, indicating that the region did not experience any LIA influence before 1650.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Bao Yang, Chun Qin, Achim Braeuning, Timothy J. Osborn, Valerie Trouet, Fredrik Charpentier Ljungqvist, Jan Esper, Lea Schneider, Jussi Griessinger, Ulf Buentgen, Sergio Rossi, Guanghui Dong, Mi Yan, Liang Ning, Jianglin Wang, Xiaofeng Wang, Suming Wang, Juerg Luterbacher, Edward R. Cook, Nils Chr Stenseth
Summary: This study presented a treering stable isotope chronology from the Tibetan Plateau to examine the variability of the Asian summer monsoon, identifying a megadrought in the second millennium BCE that significantly impacted the ecosystems and societies in northern China.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Ulf Buentgen, Kathy Allen, Kevin J. Anchukaitis, Dominique Arseneault, Etienne Boucher, Achim Brauning, Snigdhansu Chatterjee, Paolo Cherubini, Olga Churakova (Sidorova), Christophe Corona, Fabio Gennaretti, Jussi Griessinger, Sebastian Guillet, Joel Guiot, Bjorn Gunnarson, Samuli Helama, Philipp Hochreuther, Malcolm K. Hughes, Peter Huybers, Alexander Kirdyanov, Paul J. Krusic, Josef Ludescher, Wolfgang J-H Meier, Vladimir S. Myglan, Kurt Nicolussi, Clive Oppenheimer, Frederick Reinig, Matthew W. Salzer, Kristina Seftigen, Alexander R. Stine, Markus Stoffel, Scott St George, Ernesto Tejedor, Aleyda Trevino, Valerie Trouet, Jianglin Wang, Rob Wilson, Bao Yang, Guobao Xu, Jan Esper
Summary: Tree rings are crucial for climate reconstructions in the Common Era, but the influence of methodological decisions on outcomes is not well understood. A double-blind experiment produced 15 different Northern Hemisphere summer temperature reconstructions, demonstrating the subjectivity in the reconstruction process. The ensemble reconstructions show a strong correlation with instrumental temperatures, revealing both cooling and warming trends over time.
NATURE COMMUNICATIONS
(2021)
Article
Agronomy
Rao-Qiong Yang, Pei-Li Fu, Ze-Xin Fan, Shankar Panthi, Jie Gao, Ying Niu, Zong-Shan Li, Achim Brauning
Summary: A better understanding of the growth-climate sensitivity of trees can reduce uncertainties in simulating forest carbon budgets. This study examined the spatial heterogeneity of Pinus yunnanensis and Pinus kesiya's growth-climate sensitivity in Southwest China. Results show that the growth of both pine species is positively correlated with precipitation and evaporative demand during the early growing season, while high precipitation and evaporative demand during the late growing season reduce tree growth. Additionally, the sensitivity of tree growth to temperature and moisture varied among the two species.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Letter
Multidisciplinary Sciences
Bao Yang, Chun Qin, Achim Braeuning, Timothy J. Osborn, Valerie Trouet, Fredrik Charpentier Ljungqvist, Jan Esper, Lea Schneider, Jussi Griessinger, Ulf Buentgen, Sergio Rossi, Guanghui Dong, Mi Yan, Liang Ning, Jianglin Wang, Xiaofeng Wang, Beixi Fan, Suming Wang, Juerg Luterbacher, Edward R. Cook, Nils Chr. Stenseth
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Agronomy
S. Versace, A. Brauning, P. Cherubini, M. Di Febbraro, M. Hausser, F. Lombardi, M. Marchetti, P. A. Marziliano, F. Salbitano, S. Szymczak, R. Tognetti
Summary: Climate warming has increased the frequency and severity of drought events, negatively affecting tree radial growth in drought-prone regions like the Mediterranean. The growth responses of tree populations to climate change are influenced by tree age and local environment, leading to geographical patterns in tree growth and forest productivity. Intraspecific variability in sensitivity to drought events should be considered in predicting forest productivity responses to climate change.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Biodiversity Conservation
Sugam Aryal, Jussi Griessinger, Mohsen Arsalani, Wolfgang Jens-Henrik Meier, Pei-Li Fu, Ze-Xin Fan, Achim Braeuning
Summary: This study describes a statistical approach to remove the effects of Larch budmoth and climate on unbiased temperature reconstruction. The results show that removing the effect of LBM improves the growth-climate relationship and provides more reliable temperature reconstruction. There is a significant warming trend in the recent 50 years. The study also reveals the important impact of the Atlantic Multidecadal Oscillation on temperature reconstruction, with a coupled effect of the Pacific Decadal Oscillation.
ECOLOGICAL INDICATORS
(2023)