Spatial minimum temperature reconstruction over the last three centuries for eastern Nepal Himalaya based on tree rings of Larix griffithiana

Gaire, Narayan Prasad; Shah, Sameena; Sharma, Bimal Prasad; Mehrotra, Nivedita; Thapa, Uday Kunwar; Zhai, Fan; Aryal, Prakash Chandra; Bhuju, Dinesh Raj

doi:10.1007/s00704-023-04432-1

Cited by 3 publications

(1 citation statement)

References 77 publications

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“…Despite the occurrence of a wide variety of taxa suited to dendrochronology (e.g. Larix griffithiana, Tsuga dumosa, Abies densa, Juniperus indica, Pinus wallichiana ), only a few have been used for the reconstruction of temperature (Aryal et al, 2020; Bhattacharyya and Chaudhary, 2003; Borgaonkar et al, 2018; Chaudhary and Bhattacharyya, 2000; Chaudhary et al, 1999; Gaire et al, 2023; Khandu et al, 2022; Krusic et al, 2015; Yadava et al, 2015) and precipitation (Khan et al, 2020; Sano et al, 2013; Shah, 2018; Singh et al, 2021; Yadav, 2011; Yadav et al, 2014) across the Himalaya (Figure 1). The same is the case for hydrological reconstructions such as streamflow (Cook et al, 2013; Gaire et al, 2022; Misra et al, 2015; Rao et al, 2020; Shah et al, 2013, 2014; Singh and Yadav, 2013).…”

Section: Himalayan Dendrochronologymentioning

confidence: 99%

Tree-ring hydrological research in the Himalaya: State of the art and future directions

Islam,

Vennemann,

Büntgen

et al. 2024

Progress in Physical Geography: Earth and Environment

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Recent developments in tree-ring research offer great potential for reconstructing past climate changes; determining the frequencies of natural hazards; and assessing the availability of freshwater resources over timescales that extend well into the pre-instrumental period. Here, we review the state of dendrochronological research in the Himalaya and outline future directions for tree-ring-based hydrological reconstructions in a region that has a pressing societal need to understand the causes and consequences of past, present and future changes in the hydrological cycle. We used ‘tree ring’ and ‘Himalaya’ as keywords to identify scholarly articles from the Web of Science that were published between 1994 and 2022. The resulting 173 publications were separated by their spatial coverage into the western, central and eastern Himalaya, as well as their scientific purpose (e.g. reconstructing growth-climate relationships, temperature, precipitation, streamflow, floods, droughts, etc.). Our analysis shows that dendrochronological research in the Himalaya primarily focused on understanding growth-climate relationships using annual tree-ring widths measurements obtained for coniferous species, and their application in climate reconstructions. Reconstructions of hydrological processes such as streamflows, and extremes such as glacial and landslide lake outburst floods, have received less attention. Recent advances in dendrochronology, including blue intensity (BI), quantitative wood anatomy (QWA), and tree-ring stable isotopes (TRSI) should be combined to improve the resolution and accuracy of hydrological reconstructions in all parts of the Himalaya. Such studies may allow us to better understand the effects of climate change and the Himalayan water resources for its lowland surroundings. They may also facilitate decision-making processes for mitigating the impacts of climate change on natural hazards, and for better managing water resources in the region.

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Section: Himalayan Dendrochronologymentioning

confidence: 99%

Tree-ring hydrological research in the Himalaya: State of the art and future directions

Islam,

Vennemann,

Büntgen

et al. 2024

Progress in Physical Geography: Earth and Environment

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Tree-ring based summer temperature variability since 1790 CE in the Hindu Kush region of northern Pakistan

Asad,

Adil,

Shahid

et al. 2024

Int J Biometeorol

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RETRACTED: Summer temperature variability in the Hindu Kush region of northern Pakistan: Insights from tree rings of Pinus wallichiana A. B. Jacks since 1790 C.E.

Asad,

Adil,

Shaid

et al. 2023

Preprint

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The Hindu Kush high-altitude regions of Pakistan are currently experiencing severe consequences as a result of global warming. In this sense, increasing soil erosion and the quick melting of glaciers are two particularly evident effects. In such a scenario, understanding long-term temperature changes is crucial for making accurate forecasts about how the Hindu Kush region may experience regional temperature changes in the future. In this study, the climate tree-ring width (TRW) analysis designated a positive and significant correlation (r = 62.2, p < 0.001) between the TRW chronology and the June to September (summer) mean maximum temperature (MMT). Using the tree-ring width of Pinus wallichiana A. B. Jacks, we reconstructed summer temperatures in the Hindu Kush region from C.E. 1790. Statistical analysis showed that the reconstruction model has explained 38.7% of the climate variance during the instrumental period of C.E. 1967 to 2018. Five extremely warm summer periods (≥ 4 years; before the instrumental period C.E. 1967–2018) of C.E. 1804–1830, 1839–1862, 1876–1879, 1905–1910, 1923–1935, and six cold summer periods, i.e., 1790–1803, 1832–1838, 1863–1875, 1880–1904, 1911–1922, and 1936–1945, have been observed during the past 229 years. Individually, the year C.E. 1856 (31.85°C) had severe warmth, whereas C.E. 1794 (29.60°C) was observed with extreme cold. The spectral multi-taper method (MTM) shows significant (p < 0.05) cycles, which take place about every 9.3, 5.7, 4.2, and 3.6 years. In particular, the 9.3-year cycle, which closely aligns with the 11-year solar activity cycle, suggests a potential correlation between solar activity and local temperature fluctuations. Moreover, our reconstruction demonstrates a significant degree of consistency when compared to actual data and regional temperature reconstruction series, instilling a strong logic of trust in the reliability and accuracy of our findings. This evidence reaffirms that our reconstruction shows significant and dependable regional temperature signals, notably for the Hindu Kush region.

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Spatial minimum temperature reconstruction over the last three centuries for eastern Nepal Himalaya based on tree rings of Larix griffithiana

Cited by 3 publications

References 77 publications

Tree-ring hydrological research in the Himalaya: State of the art and future directions

Tree-ring hydrological research in the Himalaya: State of the art and future directions

Tree-ring based summer temperature variability since 1790 CE in the Hindu Kush region of northern Pakistan

RETRACTED: Summer temperature variability in the Hindu Kush region of northern Pakistan: Insights from tree rings of Pinus wallichiana A. B. Jacks since 1790 C.E.

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