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Spatial And Temporal Variability Of Particulate And Chromophoric Dissolved Organic Matter Absorption In The Northern Gulf Of Mexico
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Book Synopsis Spatial and Temporal Variability of Particulate and Chromophoric Dissolved Organic Matter Absorption in the Northern Gulf of Mexico by : Ashley Ann Lojek
Download or read book Spatial and Temporal Variability of Particulate and Chromophoric Dissolved Organic Matter Absorption in the Northern Gulf of Mexico written by Ashley Ann Lojek and published by . This book was released on 2012 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial and Temporal Variation of Chromophoric Dissolved Organic Matter Absorption in the Caribbean by : María M. Méndez Silvagnoli
Download or read book Spatial and Temporal Variation of Chromophoric Dissolved Organic Matter Absorption in the Caribbean written by María M. Méndez Silvagnoli and published by . This book was released on 2008 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporal Variability of Particulate Organic Carbon Fluxes in the Northern Gulf of Mexico by : Somiddho Bosu
Download or read book Temporal Variability of Particulate Organic Carbon Fluxes in the Northern Gulf of Mexico written by Somiddho Bosu and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Colour and Light in the Ocean by : Victor Martinez-Vicente
Download or read book Colour and Light in the Ocean written by Victor Martinez-Vicente and published by Frontiers Media SA. This book was released on 2020-03-26 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: CLEO publications in Frontiers in Marine Science Foreword Josef Aschbacher, Director of ESA’s Earth Observation Programmes Satellite data have drastically changed the view we have of the oceans. Covering about 70% of Earth’s surface, oceans play a unique role for our planet and for our life – but large areas remain unexplored and are difficult to reach. Since the 1980s, Earth-orbiting satellites have helped to observe what is happening at the ocean surface. Sensors like CZCS, AVHRR, SeaWifs and MODIS provided the first ocean colour data from space. Starting in 2002, ESA's Medium Resolution Imaging Spectrometer (MERIS) on-board the environmental satellite Envisat, provided detailed information on phytoplankton biomass and concentrations of other matter in the global oceans. These satellite observations laid the groundwork for studying the marine environment and how it responds to climate change, and the research community has since delivered information on the variability of marine ecosystems. Part of this work is reflected in this stunning collection of peer-reviewed publications presented at the workshop, Colour and Light in the Ocean from Earth Observation (CLEO), held at ESA’s ESRIN site in Frascati, Italy, on 6–8 September 2016. The event attracted more than 160 participants from all over the world, including remote sensing experts, marine ecosystem modelers, in-situ observers and users of Earth observation data. Scientifically, the meeting covered applications in climate studies over primary productivity and ocean dynamics, to pools of carbon and phytoplankton diversity at global and regional scales. It also demonstrated the potential of Earth observation and its contribution to modern oceanography. Looking to the future, new satellites developed by ESA under the coordination of the European Commission will further our scientific and operational observations of the seas. With Sentinel-3A in orbit and its twin Sentinel-3B following in 2017, there is a new category of data available for operational oceanographic applications and climate studies for years to come. These data are free and easy to access by anyone interested. Looking at the role of oceans in our daily lives, I am sure that this collection of scientific excellence will be valued by scientists of today and will inspire the next generation to carry these ideas into the future.
Book Synopsis Chromophoric Dissolved Organic Matter by : Meghan Nicole Helmberger
Download or read book Chromophoric Dissolved Organic Matter written by Meghan Nicole Helmberger and published by . This book was released on 2013 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seasonal Variability in Absorption and Fluorescence Properties of Chromophoric Dissolved Organic Matter in the Barataria Basin, Louisiana, USA by : Shatrughan Singh
Download or read book Seasonal Variability in Absorption and Fluorescence Properties of Chromophoric Dissolved Organic Matter in the Barataria Basin, Louisiana, USA written by Shatrughan Singh and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporal and Spatial Patterns in Optical Properties of Colored Dissolved Organic Matter on Florida's Gulf Coast by : Robyn Nicole Conmy
Download or read book Temporal and Spatial Patterns in Optical Properties of Colored Dissolved Organic Matter on Florida's Gulf Coast written by Robyn Nicole Conmy and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Characterization of Colored Dissolved Organic Matter (CDOM) in surface and ground waters in South Florida was conducted using fluorescence and absorption spectroscopy. Waters of the West Florida Shelf are heavily influenced by many river systems on Florida's Gulf Coast that, to the first order control CDOM distributions on the shelf. Seasonal surveys revealed that changes in the underwater light field as a result of major hurricanes and resuspension events are linked closely with a number of factors prior to a storm's passing such as the presence of persistant blooms, rainfall and discharge. Additionally, storm track and wind direction were found to play a significant role in CDOM signatures. A study of ten riversheds located between the Mississippi / Atchafalya River system and the Shark River in the Everglades revealed a wide range in CDOM seasonality. A regional dependence of CDOM was also found, where highest aromaticity and concentration of organic material was found for the southernmost watersheds. Basin characteristics, vegetation differences, land use and climatic patterns are implicated in the cause for regional differences. In addition to surface flow, organic material in groundwater was measured in deep and shallow aquifers surrounding the Tampa Bay Estuary. As a result of strong hydrologic links between shallow aquifers and the overlying surface waters, CDOM in both reservoirs were found to be quite similar. Deep aquifers (> 150 ft) however are less concentrated and have CDOM signatures more similar to marine waters. This suggests similar biogeochemical pathways of the material, including the influence of the aquatic microbial community. Furthermore, multi-spectral CDOM fluorescence measurements were shown to be a potential indicator of groundwater presence in Tampa Bay during times of low surficial discharge to the bay, and when some rivers are almost entirely spring-fed. Investigating CDOM distribution and signatures is vital to carbon budget and cycling questions. The amount and quality of organic material has significant implications for ecosystems, thereby affecting organisms that use CDOM as a food source, light availability for photosynthesis, UV shading provided to biota, satellite estimates of chlorophyll a, metal binding, materials transport and overall water quality.
Book Synopsis Resolving Spatial and Temporal Variability in Dissolved Organic Matter Characteristics Within Combined Agricultural and Stormwater Conveyances by : Bryce A. Mihalevich
Download or read book Resolving Spatial and Temporal Variability in Dissolved Organic Matter Characteristics Within Combined Agricultural and Stormwater Conveyances written by Bryce A. Mihalevich and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In many urban areas, stormwater runoff can threaten the ecological health of streams and downstream water bodies. Due to the increased impervious nature of urban landscapes, runoff is more 0́−flashy0́+ and as a result, high concentrations of pollutants can be transported in shorter periods of time than in more natural environments. One pollutant of concern is dissolved organic matter (DOM). DOM is important within aquatic ecosystems, but excess amounts can cause depletion in dissolved oxygen concentrations and can negatively affect aquatic organisms. This study investigated changes in DOM quantity and sources within the Northwest Field Canal (NWFC), an urban water conveyance located in Logan, Utah, USA that receives runoff during storm events. DOM was monitored at upstream and downstream locations within the canal and at selected stormwater outfalls within the study reach. During storm events, DOM concentrations were rapidly elevated to values orders of magnitude greater than in baseflow measurements, and were greater at the downstream site than at the upstream site, triggered by contributions from outfalls discharging into the canal. Changes in DOM composition during storm events confirmed that DOM is more terrestrially derived, whereas it is normally more microbially derived during baseflow conditions in the canal. These results provide better understanding of the composition of DOM in the canal system and may provide crucial information for future management of stormwater runoff that can potentially lead to the improvements of water quality in downstream water bodies.
Book Synopsis Gulf of Mexico Origin, Waters, and Biota by : Thomas S. Bianchi
Download or read book Gulf of Mexico Origin, Waters, and Biota written by Thomas S. Bianchi and published by Texas A&M University Press. This book was released on 2019-10-03 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fifth volume in the Harte Research Institute’s landmark scientific series on the Gulf of Mexico provides the first comprehensive study that covers the major core subjects of chemical oceanography in the Gulf. It synthesizes a tremendous amount of established research, together with the most recent information emerging from studies conducted during and after the Macondo Well oil spill that resulted from the explosion of the Deepwater Horizon drilling platform. Situated within the boundaries of a changing semi-tropical region, the Gulf of Mexico is a particularly important body to its bordering countries—the United States, Mexico, and Cuba—and directly influences the economies of these nations through shipping, oil and gas extraction, mineral mining, fisheries, and myriad ecosystem services and recreational opportunities. The changing chemistry of the Gulf also has wide-ranging effects on weather patterns as many of the hurricanes that reach land in the US and Mexico pass through this ocean basin. We are already seeing some of the consequences of climate change, including, to name one example, the increased frequency of harmful algal blooms, the cause of which is still unknown in most cases. This book brings together a team of expert chemical oceanographers from the US and Mexico to provide a foundational understanding of the complex chemistry of North America’s only marginal sea. Gulf of Mexico Origin, Waters, and Biota: Volume 5, Chemical Oceanography serves as an important reference for understanding the basic science, management, and economic issues facing the Gulf of Mexico while pointing out key topics in critical need of additional research.
Book Synopsis Linking Optical and Chemical Properties of Dissolved Organic Matter in Natural Waters by : Christopher L. Osburn
Download or read book Linking Optical and Chemical Properties of Dissolved Organic Matter in Natural Waters written by Christopher L. Osburn and published by Frontiers Media SA. This book was released on 2017-01-17 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A substantial increase in the number of studies using the optical properties (absorbance and fluorescence) of dissolved organic matter (DOM) as a proxy for its chemical properties in estuaries and the coastal and open ocean has occurred during the last decade. We are making progress on finding the actual chemical compounds or phenomena responsible for DOM’s optical properties. Ultrahigh resolution mass spectrometry, in particular, has made important progress in making the key connections between optics and chemistry. But serious questions remain and the last major special issue on DOM optics and chemistry occurred nearly 10 years ago. Controversies remain from the non-specific optical properties of DOM that are not linked to discrete sources, and sometimes provide conflicting information. The use of optics, which is relatively easier to employ in synoptic and high resolution sampling to determine chemistry, is a critical connection to make and can lead to major advances in our understanding of organic matter cycling in all aquatic ecosystems. The contentions and controversies raised by our poor understanding of the linkages between optics and chemistry of DOM are bottlenecks that need to be addressed and overcome.
Book Synopsis Variations of the Absorption of Chromophoric Dissolved Organic Matter in the Pearl River Estuary by : Lei Xia
Download or read book Variations of the Absorption of Chromophoric Dissolved Organic Matter in the Pearl River Estuary written by Lei Xia and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of in-situ measurements during a spring cruise survey in the Pearl River Estuary (PRE) reveals that, controlled by the two-layer gravitational circulation, chromophoric dissolved organic matter (CDOM) absorption shows a clear horizontal distribution pattern at both water surface and bottom, with higher CDOM absorption and lower spectral slope in the northwestern estuary, and a reversed pattern in the southeastern estuary and near the Hong Kong waters. The surface CDOM has higher absorption and lower spectral slope than the bottom. Horizontal transport is suggested to be the dominant hydrodynamic mechanism affecting CDOM distribution pattern in the PRE. With a regional algorithm tailored for the PRE CDOM absorption retrieval, a time series of CDOM absorption and spectral slope in the PRE and the Hong Kong waters in spring from 2012 to 2018 is produced based on satellite images obtained by four sensors with different spatial and spectral resolutions: the Visible Infrared Imaging Radiometer Suite (VIIRS), the Ocean and Land Colour Instrument (OLCI), the Hyperspectral Imager for the Coastal Ocean (HICO), and the Operational Land Imager (OLI). A correlation is revealed between the multi-temporal CDOM absorption and the monthly averaged river discharge, indicating the capability of CDOM ocean color products in identifying hydrodynamic processes in estuaries and coastal waters.
Book Synopsis Aquatic Organic Matter Fluorescence by : Paula G. Coble
Download or read book Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.
Book Synopsis Effects of Extreme Weather Events on Coastal Carbon and Nutrient Cycling by : Christopher Osburn
Download or read book Effects of Extreme Weather Events on Coastal Carbon and Nutrient Cycling written by Christopher Osburn and published by Frontiers Media SA. This book was released on 2022-11-10 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 2002 Ocean Sciences Meeting Program by :
Download or read book 2002 Ocean Sciences Meeting Program written by and published by . This book was released on 2002 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporal and Spatial Variability in the Quality of Dissolved Organic Matter in Ocean Systems by : Stuart Jerome Goldberg
Download or read book Temporal and Spatial Variability in the Quality of Dissolved Organic Matter in Ocean Systems written by Stuart Jerome Goldberg and published by ProQuest. This book was released on 2008 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oceanic DOM is an important substrate that fuels heterotrophic bacterial activity, however, there is a paucity of data regarding the composition and quality of DOM in ocean systems. I analyzed the total carbohydrate (TCHO) and dissolved combined neutral sugar (DCNS) fractions of dissolved organic carbon (DOC), and mainly used TCHO and DCNS yields (% of DOC) to assess DOM quality over large temporal and spatial scales throughout the ocean.
Book Synopsis Assessing Chromophoric Dissolved Organic Matter (CDOM) Distribution, Stocks, and Fluxes in Apalachicola Bay Using Combined Field, VIIRS Ocean Color, and Model Observations by :
Download or read book Assessing Chromophoric Dissolved Organic Matter (CDOM) Distribution, Stocks, and Fluxes in Apalachicola Bay Using Combined Field, VIIRS Ocean Color, and Model Observations written by and published by . This book was released on 2017 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the role of estuarine-carbon fluxes is essential to improve estimates of the global carbon budget. Dissolved organic matter (DOM) plays an important role in aquatic carbon cycling. Here, the chromophoric fraction of DOM (CDOM) can be readily detected via in situ and remotely-sensed optical measurements. DOM properties, including CDOM absorption coefficient at 412 nm (ag412) and dissolved organic carbon (DOC) concentrations were examined in Apalachicola Bay, a national estuarine research reserve located in the northeast Gulf of Mexico, using in situ and satellite observations during the spring and fall of 2015. Synoptic and accurate representation of estuarine-scale processes using satellite ocean color imagery necessitates the removal of atmospheric contribu- tion (~90%) to signals received by satellite sensors to successfully link to in situ observations. Three atmospheric correction schemes (e.g., Standard NIR correction, Iterative NIR correction, and SWIR correction) were tested first to find a suitable correction scheme for the VIIRS imagery in low to moderately turbid Apalachicola Bay. The iterative NIR correction performed well, and validation showed high correlation (R2 = 0.95, N = 25) against in situ light measurements. A VIIRS-based CDOM algorithm was developed (R2 = 0.87, N = 9) and validated (R2 = 0.76, N = 20, RMSE = 0.29 m-1) against in situ observations. Subsequently, ag412 was used as a proxy of DOC in March (DOC = 1.08 + 0.94 × ag412,R2 =0.88, N = 13)and in November (DOC= 1.61 + 1.33 × ag412, R2 = 0.83, N = 24) to derive DOC maps that provided synoptic views of DOC distribution, sources, and their transport to the coastal waters during the wet and dry seasons. The estimated DOC stocks were ~3.71 × 106 kg C in March and ~4.07 × 106 kg C in November over an area of ~560 km2. Volume flux (out of the bay) almost doubled for March 24 (735 m3 s-1) relative to November 4 (378 m3 s-1). However, estimates of DOC fluxes exported out of the bay from model-derived currents and satellite-derived DOC were only marginally greater in March (0.163 × 106 kg C d-1) than in November (0.124 × 106 kg C d-1) and reflected greater DOC stocks in the fall. Finally, the combination of satellite-, field-, and model-based observations revealed the strong linkage between the Apalachicola River plume, a major source of DOM, and the overall hydrodynamic forcing that controlled distributions of CDOM abundance, DOC concentration, stocks, and fluxes in the bay.
Book Synopsis Gulf of Mexico Origin, Waters, and Biota by : John W. Tunnell (Jr.)
Download or read book Gulf of Mexico Origin, Waters, and Biota written by John W. Tunnell (Jr.) and published by . This book was released on 2009 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
