Joint Global Ocean Flux Study (JGOFS)

Giese, Martina

doi:10.1007/bf02986941

Cited by 5 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nutrients including

{NH}_{4}^{+}

{NO}_{2}^{-}

{NO}_{3}^{-}

{PO}_{4}^{3 -}

and

{SiO}_{4}^{3 -}

were measured spectrophotometrically on a continuous flow analyzer (SAN Plus, Skalar Analytical B.V.). Chl‐a was measured on discrete water samples using the in vitro fluorometric method with 90% acetone extraction and determined on a Turner Designs TD‐700 fluorometer (Giese, 1994). DIC, DOC and TDN were determined using a TOC/TN‐Analyzer (TOC‐5000; Shimadzu).…”

Section: Methodsmentioning

confidence: 99%

Potential response of dark carbon fixation to global warming in estuarine and coastal waters

Zheng

Hou

et al. 2023

Global Change Biology

View full text Add to dashboard Cite

Dark carbon fixation (DCF), through which chemoautotrophs convert inorganic carbon to organic carbon, is recognized as a vital process of global carbon biogeochemical cycle. However, little is known about the response of DCF processes in estuarine and coastal waters to global warming. Using radiocarbon labelling method, the effects of temperature on the activity of chemoautotrophs were investigated in benthic water of the Yangtze estuarine and coastal areas. A dome-shaped thermal response pattern was observed for DCF rates (i.e., reduced rates at lower or higher temperatures), with the optimum temperature (T opt ) varying from about 21.9 to 32.0°C. Offshore sites showed lower T opt values and were more vulnerable to global warming compared with nearshore sites. Based on temperature seasonality of the study area, it was estimated that warming would accelerate DCF rate in winter and spring but inhibit DCF activity in summer and fall. However, at an annual scale, warming showed an overall promoting effect on DCF rates. Metagenomic analysis revealed that the dominant chemoautotrophic carbon fixation pathways in the nearshore area were Calvin-Benson-Bassham (CBB) cycle, while the offshore sites were co-dominated by CBB and 3-hydroxypr opionate/4-hydroxybutyrate cycles, which may explain the differential temperature response of DCF along the estuarine and coastal gradients. Our findings highlight the importance of incorporating DCF thermal response into biogeochemical models to accurately estimate the carbon sink potential of estuarine and coastal ecosystems in the context of global warming.

show abstract

“…Nutrients including

{NH}_{4}^{+}

{NO}_{2}^{-}

{NO}_{3}^{-}

{PO}_{4}^{3 -}

and

{SiO}_{4}^{3 -}

Section: Methodsmentioning

confidence: 99%

Potential response of dark carbon fixation to global warming in estuarine and coastal waters

Zheng

Hou

et al. 2023

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…First is the Joint Global Ocean Flux Study (JGOFS; 1987–2003), sponsored by the Scientific Committee on Oceanic Research (SCOR) and ICSU (JGOFS, 1988). Its primary goals were to “improve the understanding of the processes related to global carbon cycle processes and flux of associated biogenic elements in the ocean, focusing on the interaction between atmosphere, ocean floor and continents,” and to “develop models which enable predictions about changes of biogeochemical processes causing climate changes” (Giese, 1994: 177).…”

Section: Water In Earth System Sciencementioning

confidence: 99%

The shape of Anthropocene: The early contribution of the water sciences

Luciano

2022

The Anthropocene Review

View full text Add to dashboard Cite

The conceptual history of the Anthropocene is well-known: after a few scattered appearances in Soviet literature, the term Anthropocene was reignited independently by Paul Crutzen during his famous intervention at the IGBP-SC meeting in Cuernavaca in February 2000. The standard narrative of the history of the term emphasizes the role of Earth System Science and geology in institutionalizing the term, and in paving the way for the term’s current popularity within and beyond the natural sciences. Yet this standard account misses a third important contribution to the earliest assimilation, spread, and evolution of the term in the scientific literature: the water sciences. The present contribution reconsiders the role of seminal papers, individuals, and disciplinary areas in the water sciences in the early conceptual history of the Anthropocene concept. The analysis draws on three main findings concerning the early appearance, assimilation, and application of the term in water sciences literature which has been largely overshadowed in existing accounts of the history of the Anthropocene concept. Discussing these literary sources at the intersection of conceptual history, history of science, and scientometrics, the research argues that the water sciences were crucial in the early assimilation and application of the Anthropocene as a suitable and useful category in the international scientific community. In doing so, the analysis also advances that the water sciences should be considered as the third vector (together with Earth System Science and geology) in reconstructing the earliest conceptual history of the Anthropocene.

show abstract

“…Continuous ocean LHF monitoring is mainly located in low-latitude areas, which can improve the accuracy of ocean LHF estimates. Many experiments have been carried out to promote the study of air–sea turbulent fluxes [ 12 , 13 , 14 , 15 ], such as the Global Energy and Water Cycle Experiment ( GEWEX ) [ 16 ] and Joint Global Ocean Flux Study ( JGOFS ) [ 17 ]. Based on a large amount of experimental observations, the parameterization scheme of the turbulence flux algorithm has developed rapidly, and global ocean turbulence flux products with different scales and spatial and temporal resolutions have been produced.…”

Section: Introductionmentioning

confidence: 99%

ANN-Based Estimation of Low-Latitude Monthly Ocean Latent Heat Flux by Ensemble Satellite and Reanalysis Products

Chen

Yao

Li³

et al. 2020

Sensors

View full text Add to dashboard Cite

Ocean latent heat flux (LHF) is an essential variable for air–sea interactions, which establishes the link between energy balance, water and carbon cycle. The low-latitude ocean is the main heat source of the global ocean and has a great influence on global climate change and energy transmission. Thus, an accuracy estimation of high-resolution ocean LHF over low-latitude area is vital to the understanding of energy and water cycle, and it remains a challenge. To reduce the uncertainties of individual LHF products over low-latitude areas, four machine learning (ML) methods (Artificial Neutral Network (ANN), Random forest (RF), Bayesian Ridge regression and Random Sample Consensus (RANSAC) regression) were applied to estimate low-latitude monthly ocean LHF by using two satellite products (JOFURO-3 and GSSTF-3) and two reanalysis products (MERRA-2 and ERA-I). We validated the estimated ocean LHF using 115 widely distributed buoy sites from three buoy site arrays (TAO, PIRATA and RAMA). The validation results demonstrate that the performance of LHF estimations derived from the ML methods (including ANN, RF, BR and RANSAC) were significantly better than individual LHF products, indicated by R2 increasing by 3.7–46.4%. Among them, the LHF estimation using the ANN method increased the R2 of the four-individual ocean LHF products (ranging from 0.56 to 0.79) to 0.88 and decreased the RMSE (ranging from 19.1 to 37.5) to 11 W m-2. Compared to three other ML methods (RF, BR and RANSAC), ANN method exhibited the best performance according to the validation results. The results of relative uncertainty analysis using the triangle cornered hat (TCH) method show that the ensemble LHF product using ML methods has lower relative uncertainty than individual LHF product in most area. The ANN was employed to implement the mapping of annual average ocean LHF over low-latitude at a spatial resolution of 0.25° during 2003–2007. The ocean LHF fusion products estimated from ANN methods were 10–30 W m−2 lower than those of the four original ocean products (MERRA-2, JOFURO-3, ERA-I and GSSTF-3) and were more similar to observations.

show abstract

Joint Global Ocean Flux Study (JGOFS)

Cited by 5 publications

References 5 publications

Potential response of dark carbon fixation to global warming in estuarine and coastal waters

Potential response of dark carbon fixation to global warming in estuarine and coastal waters

The shape of Anthropocene: The early contribution of the water sciences

ANN-Based Estimation of Low-Latitude Monthly Ocean Latent Heat Flux by Ensemble Satellite and Reanalysis Products

Contact Info

Product

Resources

About