Soil atmosphere exchange of Carbonyl Sulfide (COS) regulated by diffusivity depending on water-filled pore space

Diest, H. Van; Kesselmeier, J.

doi:10.5194/bgd-4-3701-2007

Cited by 16 publications

(28 citation statements)

References 39 publications

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“…Soil microbes contain CA [ Wingate et al , 2009] and may assimilate and act as a sink for OCS. Additionally, soil OCS uptake has been shown to be dependent on soil physical properties [ Van Diest and Kesselmeier , 2008]. Most studies have shown soils are OCS sinks when ambient air is injected into the flux chamber rather than OCS‐free air [ Castro and Galloway , 1991; Geng and Mu , 2004; Kesselmeier et al , 1999; Kuhn et al , 1999; Mihalopoulos and Nguyen , 2001; Simmons et al , 1999; Steinbacher et al , 2004; Van Diest and Kesselmeier , 2008; White et al , 2010], with the exception of paddy soils [ Liu et al , 2010].…”

Section: Ocs As a Proxy For Gpp: Available Evidence And Theorymentioning

confidence: 99%

“…Seasonal variation in the northern hemisphere is largely influenced by terrestrial vegetation uptake, while variation in the southern hemisphere is largely influenced by oceanic fluxes [ Kettle et al , 2002; Montzka et al , 2007]. Studies of OCS aimed at understanding exchange in terrestrial ecosystems have measured OCS exchange in soils [ Castro and Galloway , 1991; Kesselmeier et al , 1999; Liu et al , 2010; Simmons et al , 1999; Steinbacher et al , 2004; Van Diest and Kesselmeier , 2008] and vegetation [ Brown and Bell , 1986; Goldan et al , 1988; Kesselmeier and Merk , 1993; Kluczewski et al , 1985; Sandoval‐Soto et al , 2005; Yonemura et al , 2005].…”

Section: Introductionmentioning

confidence: 99%

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The potential of carbonyl sulfide as a proxy for gross primary production at flux tower sites

et al. 2011

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[1] Seasonal dynamics of atmospheric carbonyl sulfide (OCS) at regional and continental scales and plant OCS exchange at the leaf level have shown a close relationship with those for CO 2 . CO 2 has both sinks and sources within terrestrial ecosystems, but the primary terrestrial exchange for OCS is thought to be leaf uptake, suggesting potential for OCS uptake as a proxy for gross primary production (GPP). We explored the utility of OCS uptake as a GPP proxy in micrometeorological studies of biosphere-atmosphere CO 2 exchange by applying theoretical concepts from earlier OCS studies to estimate GPP. We partitioned measured net ecosystem exchange (NEE) using the ratio of measured vertical mole fraction gradients of OCS and CO 2 . At the Harvard Forest AmeriFlux site, measured CO 2 and OCS vertical gradients were correlated and were related to NEE and GPP, respectively. Estimates of GPP from OCS-based NEE partitioning were similar to those from established environmental regression techniques, providing evidence that OCS uptake can potentially serve as a GPP proxy. Measured vertical CO 2 mole fraction gradients at five other AmeriFlux sites were used to project anticipated vertical OCS mole fraction gradients to provide indication of potential OCS signal magnitudes at sites where no OCS measurements were made. Projected OCS gradients at sites with short canopies were greater than those in forests, including measured OCS gradients at Harvard Forest, indicating greater potential for OCS uptake as a GPP proxy at these sites. This exploratory study suggests that continued investigation of linkages between OCS and GPP is warranted.

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Section: Ocs As a Proxy For Gpp: Available Evidence And Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The potential of carbonyl sulfide as a proxy for gross primary production at flux tower sites

et al. 2011

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“…These estimates, however, are based on soil COS flux datasets that are restricted to just a few studies that are focused on certain biomes and land use management. To address this problem in spatial representation, new datasets covering a large range of biomes have been collected, leading to clearer spatial patterns of soil COS fluxes at continental scales [18][19][20][21]. In particular, agricultural soils have been shown to be strong net emitters of COS [19][20][21][22][23], and consequently their behaviour is now being described differently from natural soils within global COS budgets [6].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Fertilization Reduces the Capacity of Soils to Take up Atmospheric Carbonyl Sulphide

et al. 2018

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Soils are an important carbonyl sulphide (COS) sink. However, they can also act as sources of COS to the atmosphere. Here we demonstrate that variability in the soil COS sink and source strength is strongly linked to the available soil inorganic nitrogen (N) content across a diverse range of biomes in Europe. We revealed in controlled laboratory experiments that a one-off addition of ammonium nitrate systematically decreased the COS uptake rate whilst simultaneously increasing the COS production rate of soils from boreal and temperate sites in Europe. Furthermore, we found strong links between variations in the two gross COS fluxes, microbial biomass, and nitrate and ammonium contents, providing new insights into the mechanisms involved. Our findings provide evidence for how the soil–atmosphere exchange of COS is likely to vary spatially and temporally, a necessary step for constraining the role of soils and land use in the COS mass budget.

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“…In order to properly assess where the differences arise between these methods and provide tighter constraints for global modeling of COS [ Berry et al , ; Campbell et al , ], a number of existing issues regarding controls on the surface COS budget must still be addressed. These issues include (1) better constraints on COS fluxes from soils, senescent vegetation, and other nonvegetative sources [ Van Diest and Kesselmeier , ; Simmons et al , ; Liu et al , ; Kuhn et al , ; Kesselmeier et al , ; Maseyk et al , ], (2) field‐based measurements of plant fluxes across ecosystems, and (3) boundary layer ambient surface measurements to address whether our understanding of the COS cycle is sufficient to close the gap between continental/seasonal variations [ Montzka et al , ; Campbell et al , ] and the process scale [ Stimler et al , ; Seibt et al , ; Sandoval‐Soto et al , ].…”

Section: Introductionmentioning

confidence: 99%

Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide

Berkelhammer

Asaf

Still

et al. 2014

Global Biogeochemical Cycles

104

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Understanding the processes that control the terrestrial exchange of carbon is critical for assessing atmospheric CO2 budgets. Carbonyl sulfide (COS) is taken up by vegetation during photosynthesis following a pathway that mirrors CO2 but has a small or nonexistent emission component, providing a possible tracer for gross primary production. Field measurements of COS and CO2 mixing ratios were made in forest, senescent grassland, and riparian ecosystems using a laser absorption spectrometer installed in a mobile trailer. Measurements of leaf fluxes with a branch‐bag gas‐exchange system were made across species from 10 genera of trees, and soil fluxes were measured with a flow‐through chamber. These data show (1) the existence of a narrow normalized daytime uptake ratio of COS to CO2 across vascular plant species of 1.7, providing critical information for the application of COS to estimate photosynthetic CO2 fluxes and (2) a temperature‐dependent normalized uptake ratio of COS to CO2 from soils. Significant nighttime uptake of COS was observed in broad‐leafed species and revealed active stomatal opening prior to sunrise. Continuous high‐resolution joint measurements of COS and CO2 concentrations in the boundary layer are used here alongside the flux measurements to partition the influence that leaf and soil fluxes and entrainment of air from above have on the surface carbon budget. The results provide a number of critical constraints on the processes that control surface COS exchange, which can be used to diagnose the robustness of global models that are beginning to use COS to constrain terrestrial carbon exchange.

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Soil atmosphere exchange of Carbonyl Sulfide (COS) regulated by diffusivity depending on water-filled pore space

Cited by 16 publications

References 39 publications

The potential of carbonyl sulfide as a proxy for gross primary production at flux tower sites

The potential of carbonyl sulfide as a proxy for gross primary production at flux tower sites

Nitrogen Fertilization Reduces the Capacity of Soils to Take up Atmospheric Carbonyl Sulphide

Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide

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