Climate-driven acceleration in forest evapotranspiration fuelling extreme rainfall events in the Himalaya

Dados Bibliográficos

ID15544286
AutoresNilendu Singh (0000-0001-8624-8338, Wadia Institute of Himalayan Geology), Jayendra Singh (0000-0002-6173-2999, Wadia Institute of Himalayan Geology), Anil K Gupta (0000-0003-0536-3911, Indian Institute of Technology Kharagpur), Achim Bräuning (0000-0003-3106-4229, Friedrich-Alexander-Universität Erlangen-Nürnberg), A P Dimri (0000-0002-7832-8669, Jawaharlal Nehru University), AL Ramanathan (0000-0002-3491-2273, Jawaharlal Nehru University), A L Ramanathan, Vikram Sharma (0000-0002-8655-7752, Banaras Hindu University), Reet Kamal Tiwari (0000-0002-3867-6036, Indian Institute of Technology Ropar, autor correspondente), Joyeeta Singh Chakraborty (0000-0001-8061-0180, Forest Research Institute), Pankaj Chauhan (0000-0002-7757-4825, Wadia Institute of Himalayan Geology), Tanuj Shukla (0000-0002-9874-1282, Indian Institute of Technology Kanpur), Mohit Singhal (Wadia Institute of Himalayan Geology), Suman Rawat (0000-0003-2944-5284, Wadia Institute of Himalayan Geology), Shefali Agarwal (Indian Institute of Remote Sensing), P Raja (0000-0003-4722-7547, Indian Institute of Soil and Water Conservation)
Ano2021
Volume16
Fascículo8
Páginas084042-084042
Data de publicação2021-07-15
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoEnvironmental Research Letters (JOURNAL)
Identificadores do periódicoISSN: 1748-9326 • E-ISSN: 1748-9326
EditoraIOP Publishing (PUBLISHER • GB)
DOI10.1088/1748-9326/ac14ed
OpenAlexW3183817429
IdiomaEN
Referências citadas93

Warming-induced expansion in vegetation coverage and activity can accelerate the montane hydrological regimes. However, the climate impacts on ecohydrology of forested valleys of the Himalaya are uncertain. In this study, utilizing results of about three centuries of cellulose isotope chronologies ( δ 13 C and δ 18 O) of dominant tree species, geo-chronological proxies, bio-geophysical dataset and simulations including satellite observations, we show an activation in the ecophysiological processes including evapotranspiration (ET) since the 1950s. Observation suggests rapid greening, while isotopic records indicate enhanced assimilation and transpiration in deciduous species vis-à-vis conifers post 1950s. Given strong vegetation-precipitation feedback and superimposed on the increasing trends of conducive atmospheric factors affecting valley-scale convective processes, intensification in forest ET is manifesting in a progressive enhancement in extreme rainfall events (EREs) since the last few decades. Results suggest that representation of ecophysiological processes and dynamics of seasonal moisture loading in observational and modelling framework is critical for understanding EREs under climate change

Atmospheric sciences · Climate change · Climatology · Deciduous · Ecohydrology · Ecosystem · Evapotranspiration · Geography · Meteorology · Precipitation · Vegetation (pathology · Water cycle · Climate variability and models · Environmental Science · Plant Water Relations and Carbon Dynamics · Tree-ring climate responses · Ecology · Geology