Carbon Dioxide Fluxes and Their Environmental Controls in a Riparian Forest within the Hyper-Arid Region of Northwest China

摘要: Hyper-arid regions are expected to undergo climatic change, but only a few research works have so far been conducted on the dynamics of carbon dioxide (CO2) fluxes and their consequent responses various bioclimatic factors, which is mainly attributable limited set flux observations. In this study, CO2 exchanged between forest atmosphere measured continuously by eddy covariance approach from June 2013 December 2016 in riparian forest, primary body natural oases located within lower reaches inland rivers China. The present results revealed that conditions characterized relatively high mean air temperatures (Ta) with fluctuating annual precipitation (P) during prescribed study periods were comparable historical value. net ecosystem productivity (NEP) ranged approximately 278 g C m−2 year−1 427 year−1, value 334 year−1. respiration (Re) gross (GPP) found be 558 892 respectively. also ascertained inter-annual variations NEP Re rather than GPP, result was driven primarily Ta groundwater depth under similar eco-physiological processes. addition, strongly correlated soil temperature photosynthetically active radiation for site. conclusion, desert considerably significant sink, particularly hyper-arid regions.