Size Distributions of Mineral Grains Suspended in Chesapeake Bay and Nearby Coastal Waters

1966 ◽  
Vol 7 (4) ◽  
pp. 208 ◽  
Author(s):  
Gerard C. Bond ◽  
Robert H. Meade
Keyword(s):  
Chesapeake Bay ◽  
Coastal Waters ◽  
Size Distributions

scholarly journals Ecosystem effects of shell aggregations and cycling in coastal waters: an example of Chesapeake Bay oyster reefs

Ecology ◽  
2013 ◽  
Vol 94 (4) ◽  
pp. 895-903 ◽  
Author(s):  
George G. Waldbusser ◽  
Eric N. Powell ◽  
Roger Mann
Keyword(s):  
Chesapeake Bay ◽  
Coastal Waters ◽  
Oyster Reefs ◽  
Ecosystem Effects

scholarly journals Semi-automated open water iceberg detection from Landsat applied to Disko Bay, West Greenland

2019 ◽  
Vol 65 (251) ◽  
pp. 468-480 ◽  
Author(s):  
JESSICA SCHEICK ◽  
ELLYN M. ENDERLIN ◽  
GORDON HAMILTON
Keyword(s):  
Machine Learning ◽  
Time Series ◽  
Power Law ◽  
Coastal Waters ◽  
Landsat Imagery ◽  
Open Water ◽  
Size Distributions ◽  
Negative Power ◽  
West Greenland ◽  
Cloud Mask

ABSTRACTChanges in Greenland's marine-terminating outlet glaciers have led to changes in the flux of icebergs into Greenland's coastal waters, yet icebergs remain a relatively understudied component of the ice-ocean system. We developed a simple iceberg delineation algorithm for Landsat imagery. A machine learning-based cloud mask incorporated into the algorithm enables us to extract iceberg size distributions from open water even in partially cloudy scenes. We applied the algorithm to the Landsat archive covering Disko Bay, West Greenland, to derive a time series of iceberg size distributions from 2000–02 and 2013–15. The time series captures a change in iceberg size distributions, which we interpret as a result of changes in the calving regime of the parent glacier, Sermeq Kujalleq (Jakobshavn Isbræ). The change in calving style associated with the disintegration and disappearance of Sermeq Kujalleq's floating ice tongue resulted in the production of more small icebergs. The increased number of small icebergs resulted in increasingly negative power law slopes fit to iceberg size distributions in Disko Bay, suggesting that iceberg size distribution time series provide useful insights into changes in calving dynamics.

scholarly journals Diverse circovirus-like genome architectures revealed by environmental metagenomics

2009 ◽  
Vol 90 (10) ◽  
pp. 2418-2424 ◽  
Author(s):  
Karyna Rosario ◽  
Siobain Duffy ◽  
Mya Breitbart
Keyword(s):  
Data Mining ◽  
British Columbia ◽  
Phylogenetic Analysis ◽  
Chesapeake Bay ◽  
Coastal Waters ◽  
Reclaimed Water ◽  
Sargasso Sea ◽  
Genomic Features ◽  
Rep Protein ◽  
Ssdna Viruses

Single-stranded DNA (ssDNA) viruses with circular genomes are the smallest viruses known to infect eukaryotes. The present study identified 10 novel genomes similar to ssDNA circoviruses through data-mining of public viral metagenomes. The metagenomic libraries included samples from reclaimed water and three different marine environments (Chesapeake Bay, British Columbia coastal waters and Sargasso Sea). All the genomes have similarities to the replication (Rep) protein of circoviruses; however, only half have genomic features consistent with known circoviruses. Some of the genomes exhibit a mixture of genomic features associated with different families of ssDNA viruses (i.e. circoviruses, geminiviruses and parvoviruses). Unique genome architectures and phylogenetic analysis of the Rep protein suggest that these viruses belong to novel genera and/or families. Investigating the complex community of ssDNA viruses in the environment can lead to the discovery of divergent species and help elucidate evolutionary links between ssDNA viruses.

scholarly journals In situ activity of NAC11-7 roseobacters in coastal waters off the Chesapeake Bay based on ftsZ expression

2011 ◽  
Vol 13 (4) ◽  
pp. 1032-1041 ◽  
Author(s):  
Daohong Yao ◽  
Alison Buchan ◽  
Marcelino T. Suzuki
Keyword(s):  
Chesapeake Bay ◽  
Coastal Waters

scholarly journals Modelling size distributions of marine plastics under the influence of continuous cascading fragmentation

2021 ◽  
Author(s):  
Mikael Kaandorp ◽  
Henk Dijkstra ◽  
Erik van Sebille
Keyword(s):  
Coastal Waters ◽  
Vertical Mixing ◽  
Field Studies ◽  
Box Model ◽  
Fragmentation Model ◽  
Minor Effect ◽  
Size Distributions ◽  
Plastic Pollution ◽  
Secondary Plastic ◽  
A Minor

<p>Field studies have shown that plastic fragments make up the majority of plastic pollution in the oceans in terms of abundance. How quickly environmental plastics fragment is not well understood, however. Here, we study this process by considering a model which captures continuous fragmentation of particles over time in a cascading fashion. With this cascading fragmentation model, we simulate particle size distributions (PSDs), specifying the abundance or mass of particles for different size classes.</p><p> </p><p>The fragmentation model is coupled to an environmental box model, simulating the distributions of plastic particles in the ocean, coastal waters, and on the beach. Transport in the box model is based on a previous study regarding a previous study regarding sources and sinks of marine plastics in the Mediterranean Sea. We compare the modelled PSDs to available observations, and use the results to illustrate the effect of size-selective processes such as vertical mixing in the water column and resuspension of particles from the beach into coastal waters.</p><p> </p><p>Using the coupled fragmentation and environmental box model, we quantify the role of fragmentation on the marine plastic mass budget. While fragmentation is a major source of (secondary) plastic particles in terms of abundance, it seems to have a minor effect on the total mass of particles larger than 0.1 mm. Future comparison to observed PSD data should allow us to understand size-selective plastic transport in the environment, and potentially inform us on plastic longevity.</p>

Impact of particulate scattering in coastal waters on reflectance spectra: simulations and Chesapeake Bay measurements

OCEANS 2006 ◽  
2006 ◽  
Author(s):  
Alexander Gilerson ◽  
Jing Zhou ◽  
Marco Vargas ◽  
Barry Gross ◽  
Fred Moshary ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Coastal Waters ◽  
Reflectance Spectra
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