Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS03] Exploring the role of soil in earth science: ecological/biogeochemical linkage and beyond

Wed. May 27, 2015 11:00 AM - 12:45 PM 104 (1F)

Convener:*Rota Wagai(National Institute for Agro-Environmental Sciences, Carbon & Nutrient Cycling Division), Kosaki Takashi(Tokyo Metropolitan University), Chair:Rota Wagai(National Institute for Agro-Environmental Sciences, Carbon & Nutrient Cycling Division)

12:15 PM - 12:18 PM

[MIS03-P01] Applications of Cavity Ring-Down Spectroscopy to carbon, nitrogen and water cycling in soil

3-min talk in an oral session

*Kate DENNIS1, Kuan HUANG1 (1.Picarro, Inc.)

Keywords:CRDS, soil flux, nitrogen isotopes, evapotranspiration

Over the past five years, advances in cavity-enhanced absorption spectroscopy have fundamentally changed the way soil scientists study carbon, nitrogen and water cycling between the subsurface, plants and the atmosphere. With the continuous evolution of performance, including high precision, low drift and part-per-billion resolution, along with compact, field-deployable and easy-to-use instruments, scientists are increasingly able to leave their labs and make measurements directly in the field. Here we describe how Picarro's Cavity Ring-Down Spectroscopy technology has been applied to a number of soil applications, including (i) the determination of soil flux measurements by coupling newly developed real-time software with simultaneous measurements of CO2, CH4, N2O, NH3 and H2O from closed-loop, recirculated soil chambers; (ii) partitioning water loss from evaporation versus transpiration in arid environments using in-situ measurements of ambient atmospheric water vapor measurements, soil water isotopes and the isotopic signature of local transpiration; and (iii) using in-situ measurements of d15N and the site preference of 15N in N2O to constrain N2O emissions in agricultural settings.