Estimating intraseasonal intrinsic water-use efficiency from high-resolution tree-ring δ¹³ C data in boreal Scots pine forests.

ABSTRACT: Intrinsic water-use efficiency (iWUE), a key index for carbon and water balance, has been widely estimated from tree-ring δ¹³ C at annual resolution, but rarely at high-resolution intraseasonal scale. We estimated high-resolution iWUE from laser-ablation δ¹³ C analysis of tree-rings (iWUE_iso ) and compared it with iWUE derived from gas exchange (iWUE_gas ) and eddy covariance (iWUE_EC ) data for two Pinus sylvestris forests from 2002 to 2019. By carefully timing iWUE_iso via modeled tree-ring growth, iWUE_iso aligned well with iWUE_gas and iWUE_EC at intraseasonal scale. However, year-to-year patterns of iWUE_gas , iWUE_iso , and iWUE_EC were different, possibly due to

SUBMITTER: Tang Y 

PROVIDER: S-EPMC10108005 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature