397967 - Investigation of environmental similitudes and emergent scaling of CO2 fluxes in coastal wetlands
Tuesday, June 5
10:30 AM - 12:00 PM
Location: Greenway IJ
Post-doctoral Research Associate, Department of Civil and Environmental Engineering
West Virginia University
Omar Abdul-Aziz, Morgantown, WV, USA – West Virginia University
Coastal wetlands are among the most productive and dynamic ecosystems on the planet. Subject to the complex climatic-biogeochemical-ecological interactions, it is difficult to characterize and robustly predict the CO2 fluxes across wetlands. We derived meaningful dimensionless numbers utilizing the concept of similitude and dimensional analysis from fluid mechanics. Field data collected during May-October 2013 from four salt marshes in Waquoit Bay and Great Pond estuaries, MA were used to investigate the similitude based general patterns and scaling of CO2 fluxes. Graphical exploration of the formulated dimensionless numbers with the measured dataset indicated an emergence of a generalized characteristics curve and different environmental regimes of CO2 fluxes. Based on the identified regimes, non-linear scaling relationships of the CO2 fluxes with the environmental variables were determined. The scaling relationships suggested a higher scale dependence of CO2 fluxes with soil temperature than with the photosynthetically active radiation and porewater salinity. The estimated scaling relationships can aid the development of a robust predictive model of wetland CO2 fluxes under a changing climate and environment.