Tree-ring based May-June streamflow reconstruction of Zemu River in the Eastern Himalaya

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00636992" target="_blank" >RIV/86652079:_____/25:00636992 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00141449

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214581825003337" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214581825003337</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ejrh.2025.102508" target="_blank" >10.1016/j.ejrh.2025.102508</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tree-ring based May-June streamflow reconstruction of Zemu River in the Eastern Himalaya

Popis výsledku v původním jazyce

Study region: Zemu River, Upper Teesta River Basin, Eastern Himalaya Study focus: In this study, a tree-ring chronology of Abies densa was used as a proxy to reconstruct a century-long May-June streamflow of the Zemu River. The reconstruction was carried out based on a scaling approach which explained 35 % of variance in observed streamflow and was varified by comparing with other regional reconstructions. Moving windowed Pearson correlation was performed to reveal the temporal influence of major climate forcings (e.g., ENSO) with the streamflow of Zemu River. New hydrological insights for the region: Our study identified a strong negative relationship between tree-growth and observed May-June streamflow in the glacier-fed Zemu River. This counterintuitive, inverse relationship is likely due to the contribution of additional meltwater when conditions are dry and insulation over the glacier is high. The reconstructed streamflow record reveals several high- and low-flow periods above and below the mean value (+/- 1 sigma) and identifies 30 high-flow years and 33 low-flow years, including some historically recorded floods in 1927, 1968, 1980, 1982 and 1998, and of severe droughts in 1951, 1976 and 2017. Most recently, a positive association between reconstructed streamflow and the ENSO has become apparent, which we attribute to reduced penetration of the Indian Summer Monsoon during ENSO years, which reduces precipitation but maintains for longer warmer and drier conditions that allow glacier melt.

Název v anglickém jazyce

Tree-ring based May-June streamflow reconstruction of Zemu River in the Eastern Himalaya

Popis výsledku anglicky

Study region: Zemu River, Upper Teesta River Basin, Eastern Himalaya Study focus: In this study, a tree-ring chronology of Abies densa was used as a proxy to reconstruct a century-long May-June streamflow of the Zemu River. The reconstruction was carried out based on a scaling approach which explained 35 % of variance in observed streamflow and was varified by comparing with other regional reconstructions. Moving windowed Pearson correlation was performed to reveal the temporal influence of major climate forcings (e.g., ENSO) with the streamflow of Zemu River. New hydrological insights for the region: Our study identified a strong negative relationship between tree-growth and observed May-June streamflow in the glacier-fed Zemu River. This counterintuitive, inverse relationship is likely due to the contribution of additional meltwater when conditions are dry and insulation over the glacier is high. The reconstructed streamflow record reveals several high- and low-flow periods above and below the mean value (+/- 1 sigma) and identifies 30 high-flow years and 33 low-flow years, including some historically recorded floods in 1927, 1968, 1980, 1982 and 1998, and of severe droughts in 1951, 1976 and 2017. Most recently, a positive association between reconstructed streamflow and the ENSO has become apparent, which we attribute to reduced penetration of the Indian Summer Monsoon during ENSO years, which reduces precipitation but maintains for longer warmer and drier conditions that allow glacier melt.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10503 - Water resources

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrology: Regional Studies

ISSN

2214-5818

e-ISSN

2214-5818

Svazek periodika

60

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

102508

Kód UT WoS článku

001510787600003

EID výsledku v databázi Scopus

2-s2.0-105007681676