Using Eddy Covariance Sensors to Quantify Carbon Metabolism of Peatlands: A Case Study in Turkey

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Evrendilek F., Karakaya N., Aslan G., ERTEKİN C.

SENSORS, vol.11, no.1, pp.522-538, 2011 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 1
  • Publication Date: 2011
  • Doi Number: 10.3390/s110100522
  • Journal Name: SENSORS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.522-538
  • Keywords: carbon cycle, flux tower, biogeochemical model, diurnal variation, ECOSYSTEM-ATMOSPHERE EXCHANGE, OMBROTROPHIC BOG, CO2, VARIABILITY
  • Akdeniz University Affiliated: Yes

Abstract

Net ecosystem exchange (NEE) of carbon dioxide (CO2) 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 CO2 m(-2) s(-1), with a mean value of 0.11 mg CO2 m(-2) s(-1). Nighttime ecosystem respiration (R-E) was on average measured as 0.23 +/- 0.09 mg CO2 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 CO2 m(-2) s(-1). Total R-E as the sum of nighttime and daytime RE ranged from 0.47 to 0.87 mg CO2 m(-2) s(-1), thus yielding estimates of gross primary productivity (GPP) at -0.35 +/- 0.18 and -0.74 +/- 0.43 mg CO2 m(-2) s(-1). Use of EC sensors and M(N) LR models is one of the most direct ways to quantify turbulent CO2 exchanges among the soil, vegetation and atmosphere within the atmospheric boundary layer, as well as source and sink behaviors of ecosystems.