The fluorescence of dissolved organic matter in the Mid-Atlantic Bight

Chen, R.F; Zhang, Y; Vlahos, Penny; Rudnick, Steven M.

doi:10.1016/s0967-0645(02)00165-0

Cited by 48 publications

(32 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks in FDOM M corresponding to high biological activity in the subsurface layer (chlorophyll a maxima; Fig. 9) are also reported in marine environments (Chen et al 2002). Using Tracker Acoustic Profiling System, Yamasaki et al (2010) showed that the metalimnetic oxygen minimum layer sustained high abundance of phytoplankton and zooplankton.…”

Section: Discussionmentioning

confidence: 62%

Biogeochemical control on fluorescent dissolved organic matter dynamics in a large freshwater lake (Lake Biwa, Japan)

Thottathil

Hayakawa

Hodoki

et al. 2013

Limnology & Oceanography

View full text Add to dashboard Cite

The dynamics of fluorescent dissolved organic matter (FDOM) in the large monomictic freshwater Lake Biwa (surface area 675 km 2 , maximum depth 104 m) was studied from December 2010 to December 2011. The proteinlike FDOM (FDOM T ) and dissolved organic carbon (DOC) showed epilimnetic accumulation (FDOM T from 4.42 6 0.22 quinine sulfate units [QSU] to 6.30 6 0.04 QSU; DOC from 80.8 6 2.7 mmol L 21 to 102.7 6 3.5 mmol L 21 ) between nutrient-replete winter mixing to nutrient-depleted stratified periods. This accumulation is attributed to the reduced heterotrophic activity following severe P-limitation. The positive correlation between accumulated DOC and FDOM T in the epilimnion and their uniform reduction in the hypolimnion (, 9%) suggest FDOM T as a proxy for semi-labile DOM. The humic-like FDOM (FDOM M ) generally increased with depth, a pattern similar to nutrients and total carbon dioxide (TCO 2 ), but adverse to dissolved oxygen. The significant positive correlations of FDOM M with apparent oxygen utilization (r 5 0.86, p , 0.001), TCO 2 (r 5 0.91, p , 0.001), nitrate (r 5 0.83, p , 0.001), and phosphate (r 5 0.76, p , 0.001) in the deeper layers suggest that FDOM M is formed during hypolimnetic mineralization. We estimated that , 8% of the organic carbon degraded in the hypolimnion is transferred into humic substances. The minor contribution of DOC (6.4%) to hypolimnetic mineralization suggests that production of humic substances is mainly fueled by the mineralization of sinking biogenic particles. The production and consumption of FDOM in freshwater lakes may influence the quality and bioavailability of carbon exported from these systems.

show abstract

Section: Discussionmentioning

confidence: 62%

Biogeochemical control on fluorescent dissolved organic matter dynamics in a large freshwater lake (Lake Biwa, Japan)

Thottathil

Hayakawa

Hodoki

et al. 2013

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Such studies demonstrate that a c~o~ may be useful as a tracer of terrigenous DOM in the coastal ocean. However, Chen et al (2002) observed significant inputs of fluorescent CDOM to the MAB from shelf-slope exchange and from upwelling of slope water in Georges Bank and concluded that riverslestuaries contribute no more than 10% of CDOM fluorescence. Satellite data analysis of surface ocean CDOM and sea-surface temperatures within the MAE3 may resolve these contrasting results.…”

Section: Cdom and Doc Algorithm Development And Validationmentioning

confidence: 99%

Algorithm development and validation for satellite‐derived distributions of DOC and CDOM in the U.S. Middle Atlantic Bight

Mannino¹,

Russ²,

Hooker³

2008

J. Geophys. Res.

261

240

View full text Add to dashboard Cite

Carbon is the basic building block of life, and the carbon cycle represents the cycle of all living organisms. Through the process of photosynthesis, plants on land or algae living in lakes and oceans take up carbon dioxide and convert this into living organic products (such as carbohydrates, proteins, fats, etc.). Through the process of respiration, organisms break down these organic compounds for energy, metabolizing them into various forms of chemical energy and regenerating the carbon dioxide. The level of carbon dioxide in the atmosphere plays an important role in earth's climate through the "greenhouse effect". Therefore, understanding the carbon cycle provides insight about life on earth as well as its role in climate change. The carbon component of interest here is dissolved organic carbon (DOC), which comprises >97% of the organic carbon in the ocean. The dissolved organic carbon in the coastal ocean originates from many sources, including land plant debris and pollution transported by rivers and material excreted from algae and other living organisms in the ocean. Our objective in this study was to quantify DOC from space through the portion of DOC that can be seen by satellite sensorscolored dissolved organic matter (CDOM). The substance that leaches from tea bags is an example of CDOM. Satellite instruments used to study ocean biology do not measure ocean constituents directly, but rather measure light leaving the ocean at multiple wavelengths (blue, green, red, etc.), which can be used to derive the concentration of ocean constituents, including chlorophyll and CDOM. In fact, the presence of high levels of CDOM in coastal waters reduces the accuracy of satellite chlorophyll measurements.We 'conducted multiple expeditionswithin the coastal ocean region along the U.S. MidAtlantic to collect measurements of DOC, CDOM, and light leaving the ocean to develop relationships to compute CDOM and DOC from NASA's MODIS and SeaWiFS satellite sensors. We also evaluated the accuracy of the satellite measurements through comparisons with independent measurements collected at sea. Our results demonstrate that the accuracies of satellite-derived measurements are within 9% for DOC and 20% for CDOM for our coastal ocean study region. These results compare very well with the 33% accuracy for satellite estimates of ocean chlorophyll globally. This study represents the first successful and verified satellite measurements of dissolved organic carbon and colored dissolved organic matter in the coastal ocean. These new satellite products can be applied to study coastal ocean processes such as the export of DOC from land to the ocean, the summer accumulation of DOC from algae and other organisms, and the summer bleaching of CDOM by sunlight. We can apply these satellite observations to investigate interannual and decadal-scale variability in surface ocean CDOM and DOC within coastal waters and monitor impacts of climate change and human activities on coastal ecosystems.https://ntrs.nasa.gov/search.jsp?R=20080040698 2019-03-2...

show abstract

“…The concentrations of the chemical parameters measured at the Eiras reservoir (S = 0.00) were considered. Rivers are sources of the 2 types of fluorophores (Mayer et al 1999, Chen et al 2002, but especially of the humic substances. The river inputs were responsible for the surface FDOM maxima recorded under conditions of large continental runoff.…”

Section: Seasonal Accumulationmentioning

confidence: 99%

“…DOM fluorescence has mainly been used in studies of estuarine mixing (Jaffé et al 2004), photodegradation (Obernosterer & Herndl 2000, Del Vecchio & Blough 2002 and DFAA distributions (Yamashita & Tanoue 2003). Comparatively few examinations comparing DOM fluorescence with DOC or nutrient distributions have been performed (Chen & Bada 1992, Hayase & Shinozuka 1995, Chen et al 2002, and all were focused on humic-like fluorescence.…”

Section: Introductionmentioning

confidence: 99%

DOM fluorescence, a tracer for biogeochemical processes in a coastal upwelling system (NW Iberian Peninsula)

Nieto‐Cid¹,

Álvarez‐Salgado²,

Gago³

et al. 2005

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

The fluorescence of dissolved organic matter in the Mid-Atlantic Bight

Cited by 48 publications

References 56 publications

Biogeochemical control on fluorescent dissolved organic matter dynamics in a large freshwater lake (Lake Biwa, Japan)

Biogeochemical control on fluorescent dissolved organic matter dynamics in a large freshwater lake (Lake Biwa, Japan)

Algorithm development and validation for satellite‐derived distributions of DOC and CDOM in the U.S. Middle Atlantic Bight

DOM fluorescence, a tracer for biogeochemical processes in a coastal upwelling system (NW Iberian Peninsula)

Contact Info

Product

Resources

About