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Reconstruction of interannual variability of NEP using a process‐based model ( InTEC ) with climate and atmospheric records at Fluxnet‐Canada forest sites
Author(s) -
Wu Chaoyang,
Chen Jing M.
Publication year - 2014
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.3789
Subject(s) - environmental science , fluxnet , climate change , precipitation , terrestrial ecosystem , climatology , forest ecology , ecosystem , carbon cycle , atmospheric sciences , global change , representative concentration pathways , physical geography , climate model , meteorology , ecology , geography , geology , eddy covariance , biology
ABSTRACT Reconstruction of interannual variability of net ecosystem productivity ( NEP ) in forests provides an important approach to analyse impacts of future climate change on global carbon (C) cycling. However, lacking climate data at sufficient temporal scales constrains NEP simulation and the potential of monthly climate data in modelling annual NEP remains largely poorly understood. In this study, annual NEP at 12 Fluxnet‐Canada forest sites (93 site‐year) was simulated using a process‐based Integrated Terrestrial Ecosystem C‐budget ( InTEC ) model driven by forest inventory data, site‐level meteorological measurements, site‐specific indicators, and remote sensing observations. Our results indicate that the InTEC model can capture the first order of interannual NEP variability with coefficients of determination ( R 2 ) of 0.84 ( p < 0.001) between simulated and measured NEP , providing a significant opportunity to reconstruct long‐term climate change on forest C dynamics using only available monthly historical climate records. The usefulness of model simulation was further evaluated at three post‐clearcut chronosequences Douglas‐fir stands of British Columbia, suggesting that the Douglas‐fir ecosystem would remain a C source for 15–20 years after clearcut and the maximum annual NEP may occur at the age around 50.