title: Using eddy covariance sensors to quantify carbon metabolism of peatlands: a case study in Turkey.
abstract: Net ecosystem exchange (NEE) of carbon dioxide (CO(2)) was measured in a cool temperate peatland in northwestern Turkey on a continuous basis using eddy covariance (EC) sensors and multiple (non-)linear regression-M(N)LR-models. Our results showed that hourly NEE varied between -1.26 and 1.06 mg CO(2) m(-2) s(-1), with a mean value of 0.11 mg CO(2) m(-2) s(-1). Nighttime ecosystem respiration (R(E)) was on average measured as 0.23 ± 0.09 mg CO(2) m(-2) s(-1). Two best-fit M(N)LR models estimated daytime R(E) as 0.64 ± 0.31 and 0.24 ± 0.05 mg CO(2) m(-2) s(-1). Total R(E) as the sum of nighttime and daytime R(E) ranged from 0.47 to 0.87 mg CO(2) m(-2) s(-1), thus yielding estimates of gross primary productivity (GPP) at -0.35 ± 0.18 and -0.74 ± 0.43 mg CO(2) m(-2) s(-1). Use of EC sensors and M(N)LR models is one of the most direct ways to quantify turbulent CO(2) exchanges among the soil, vegetation and atmosphere within the atmospheric boundary layer, as well as source and sink behaviors of ecosystems.
authors.affiliation: Department of Environmental Engineering, Abant Izzet Baysal University, 14280 Golkoy Campus Bolu, Turkey. fevrendilek@ibu.edu.tr
authors.forename: Fatih
authors.initials: F
authors.lastname: Evrendilek
authors.forename: Nusret
authors.initials: N
authors.lastname: Karakaya
authors.forename: Guler
authors.initials: G
authors.lastname: Aslan
authors.forename: Can
authors.initials: C
authors.lastname: Ertekin
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism*; D017753:Ecosystem; D014421:Turkey
chemical_list: D002245:Carbon Dioxide