Flux of Dissolved and Particulate Low-Temperature Pyrogenic Carbon from Two High-Latitude Rivers across the Spring Freshet Hydrograph

Myers‐Pigg, Allison; Louchouarn, Patrick; Teisserenc, Roman

doi:10.3389/fmars.2017.00038

Cited by 18 publications

(46 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As expected, significant export of both PBC and POC were observed during the wet season (PBC: 1.3 Gg/year; POC: 9.2 Gg/year) and were significantly higher compared to the dry season (PBC: 0.3 Gg/year; POC: 2.2 Gg/year). This observation agrees with the suggested enhanced mobilization and export of particulate material under high flow conditions (Myers‐Pigg et al, ; Wagner et al, ). However, there was no significant difference in the seasonal contributions of PBC to the bulk POC pool (Student's t test, p = 0.05; dry: 15.3 ± 9.2%; wet: 14.8 ± 9.8%).…”

Section: Discussionsupporting

confidence: 92%

“…However, we note that this relationship between DBC and PBC in the Altamaha River appears to be driven in response to an initial pulsing from storm events at the onset of the wet season, as a strong significant correlation between DBC and PBC fluxes ( r = 0.96, p < 0.01) is observed when not considering the data corresponding to January 2016. In a similar manner to our study, Myers‐Pigg et al () reported that the coupling of low‐temperature‐derived PyC in Arctic systems is disrupted at high flow, stimulated by an early release of dissolved‐PyC along the rising limb of the major discharge peak compared to particulate‐PyC peaking during the falling limb of the major discharge peak. Wagner et al () also reported an early release of DBC during rising discharge in a recently burned watershed in Colorado.…”

Section: Discussionsupporting

confidence: 89%

“…We note that our sampling period in January 2016 occurred about half way through the falling limb of this high discharge event. As an early release of both low‐temperature PyC and BPCA‐derived PyC has been reported prior to high discharge events in both small subbasins (Wagner et al, ) and larger watersheds (Myers‐Pigg et al, ), it is possible that an initial pulse of DBC occurred prior to our sample collection.…”

Section: Discussionmentioning

confidence: 86%

“…Therefore, it is possible that this correlation becomes periodically uncoupled across the hydrogram on large watershed scales. For instance, Myers‐Pigg et al () showed that coupling between low‐temperature pyrogenic carbon and bulk DOC in the Yenisei River, a large Arctic river, was disrupted under high flow conditions. Xu et al () further noted the seasonal decoupling between DBC and DOC in the Huanghe River while also highlighting the importance of local point sources on DBC export.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

et al. 2018

View full text Add to dashboard Cite

Rivers play an important role in the transport of organic carbon from terrestrial to marine environments. A significant portion of this material is black carbon (BC), a residue of incomplete biomass and fossil fuel combustion. BC is mobilized in fluvial systems as both particulate BC (PBC) and dissolved BC (DBC), and the export of BC to coastal environments may have significant implications for carbon cycling in marine environments. However, while little is known regarding the potential connectivity between riverine export of PBC and DBC or the potential importance of such a relationship in constraining future BC budgets, current knowledge suggests that fluvial export of PBC and DBC are decoupled in small fire-impacted watersheds. This study aims to further address this subject on a larger watershed scale. For this study, 13 monthly samples were collected (September 2015 to September 2016) near the mouth of the Altamaha River, Georgia. PBC and DBC were characterized using the benzenze polycarboxylic acid method. Seasonal hydrology and regional shifts in storm events play an important role for both PBC and DBC export during high flow months. The DBC concentrations were comparable among wet and dry seasons, whereas evidence of seasonal salt water intrusions suggests an additional estuarine contribution of PBC at the sampling location. The DBC and PBC fluxes were generally coupled, although this pattern was disrupted during initial storm pulses. While this is the first report of potential coupling between DBC and PBC export, environmental drivers controlling this behavior between DBC and PBC remain to be constrained.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Levoglucosan can be transported to marine sediments through the atmosphere and by rivers (Hunsinger et al, 2008). Furthermore, recent work confirms that levoglucosan is exported by particulate matter, although varying spatially and temporally, in rivers at a high enough level to potentially enter sedimentary deposits and record historical wildfire signatures (Myers-Pigg et al, 2017). However, before we can confidently apply levoglucosan as a biomass burning proxy in marine sediments, there is a need for studies on how levoglucosan is transported to the marine environment, how it is reflecting biomass burning on continents, as well as the fate of levoglucosan and its isomers while settling through the marine water column and during deposition in marine sediments.…”

Section: Introductionmentioning

confidence: 85%

Transport and deposition of the fire biomarker levoglucosan across the tropical North Atlantic Ocean

Schreuder

Hopmans

Stuut

et al. 2018

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Biomass burning impacts biogeochemical cycling, vegetation dynamics and climate. However, interactions between fire, climate and vegetation are not well understood and therefore studies have attempted to reconstruct fire and vegetation history under different climatic conditions using sedimentary archives. Here we focus on levoglucosan, a thermal by-product of cellulose generated during biomass burning, and, therefore, a potential fire biomarker in the marine sedimentary archive. However, before levoglucosan can be applied as a biomass burning proxy in marine sediments, there is a need for studies on how levoglucosan is transported to the marine environment, how it is reflecting biomass burning on continents, as well as the fate of levoglucosan in the marine water column and during deposition in marine sediments. Here we present analyses of levoglucosan, using an improved Ultra High Pressure Liquid Chromatography-Electro Spray Ionization/High Resolution Mass Spectrometry (UHPLC-ESI/HRMS) method, in atmospheric particles, in particulate matter settling through the water column and in marine surface sediments on a longitudinal transect crossing the tropical North Atlantic Ocean at 12°N. Levoglucosan was detected in the atmosphere, although in low concentration, possibly due to the sampled particle size, the source area of the aerosols, or the short time interval of sampling by which large burning events may have been missed. In sinking particles in the tropical North Atlantic Ocean we find that levoglucosan deposition is influenced by a mineral ballast effect associated with marine biogenic particles, and that levoglucosan is not transported in association with mineral dust particles. Highest levoglucosan concentrations and seasonal differences in sinking particles were found close to continents and low concentrations and seasonal differences were found in the open ocean. Close to Africa, levoglucosan concentration is higher during winter, reflecting seasonal burning in northwestern Africa. However, close to South America levoglucosan concentrations appear to be affected by riverine transport from the Amazon River. In surface sediments close to South America, levoglucosan concentration is higher than in the middle of the Atlantic Ocean, implying that here the influence from the South American continent is important and perennial. Our study provides evidence that degradation of levoglucosan during settling in the marine water column is not substantial, but is substantial at the sediment-water interface. Nevertheless, levoglucosan was detected in all surface sediments throughout the tropical North Atlantic, indicating its presence in the marine sedimentary record, which reveals the potential for levoglucosan as a biomass burning proxy in marine sediments.

show abstract

Spatiotemporal controls on the delivery of dissolved organic matter to streams following a wildfire

Roebuck

Bladon

Donahue³

et al. 2022

Preprint

View full text Add to dashboard Cite

Warmer and drier climate has contributed to increased occurrence of large, high severity wildfires in the Pacific Northwest, drawing concerns for water quality and ecosystem recovery. While nutrient fluxes generally increase post-fire, the composition of organic matter (OM) transported to streams immediately following a fire is poorly constrained, yet can play an integral role in downstream water quality and biogeochemistry. Here, we quantified spatiotemporal patterns of dissolved OM (DOM) chemistry for five streams burned by wildfires in Oregon, USA in 2020. We sampled over a 24-hour storm event one month after the fire, revealing variable temporal behavior in DOM dynamics. DOM chemistry was directly related with burn severity spatially. Specifically, nitrogen and aromatic character of DOM increased in streams burned at greater severity. Our results suggest a spatial overprinting of DOM dynamics immediately following fire activity and highlight a key gap in our knowledge of post-fire DOM transport to streams.

show abstract

Flux of Dissolved and Particulate Low-Temperature Pyrogenic Carbon from Two High-Latitude Rivers across the Spring Freshet Hydrograph

Cited by 18 publications

References 76 publications

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

Transport and deposition of the fire biomarker levoglucosan across the tropical North Atlantic Ocean

Spatiotemporal controls on the delivery of dissolved organic matter to streams following a wildfire

Contact Info

Product

Resources

About