Raskoff K.A.,Monterey Peninsula College
Zootaxa | Year: 2010
A new genus and species of a common deep-water narcomedusa is described from the Arctic Ocean. The species has four primary tentacles, four secondary tentacles, with three interradial manubrial pouches in each quadrant. A revision and taxonomic key of the family Aeginidae is presented to account for the new genus. Detailed information on its finescale vertical and horizontal distributions show that it occurs in a fairly narrow depth range between 1400-2000 meters. The species was observed 423 times at eleven stations, demonstrating that new species can be common in the underexplored regions of the ocean. Copyright © 2010 Magnolia Press.
Hochstaedter A.,Monterey Peninsula College |
Sullivan D.,Marine Advanced Technology Education Center
Special Paper of the Geological Society of America | Year: 2012
Google Earth provides an easily accessible platform for students to view animations of oceanographic processes created by merging satellite, buoy, and student-built ocean-drifter data. The power of Google Earth is that many oceanographic properties can be displayed simultaneously over time such as atmospheric pressure, winds, surface currents, and sea-surface temperature. Lessons created from these activities address many of the principal outcomes of an introductory oceanography course, including the ability to analyze the interrelationship of ocean processes and understand how modern oceanography relies on technology to observe and measure the state of the oceans. In the classroom, the time-animation effort is paired with a drifter project where students build and release Global Positioning System-equipped drifters and watch their movement via satellite over the Internet. Because students see, touch, and feel the drifter in the classroom as they build and decorate it, they develop an inherent interest in its fate. Following the movement of the drifter fosters student interest in related oceanographic processes, many of which can be animated in Google Earth for the same time period, providing easy comparisons. The satellite data used in these animations are accessed through the National Oceanic and Atmospheric Administration (NOAA) Southwest Fisheries Science Center's ERDDAP (Environmental Research Division's Data Access Program) data server and displayed in Google Earth using keyhole markup language (KML) scripts. Satellite products are downloaded as .png image files and displayed as a series of image overlays to create time animations. Python scripts automate the process of generating KML scripts. © 2012 The Geological Society of America. All rights reserved.
Raskoff K.A.,Monterey Peninsula College |
Hopcroft R.R.,University of Alaska Fairbanks |
Kosobokova K.N.,RAS Shirshov Institute of Oceanology |
Purcell J.E.,Western Washington University |
Youngbluth M.,Harbor Branch Oceanographic Institution
Deep-Sea Research Part II: Topical Studies in Oceanography | Year: 2010
In order to provide a baseline understanding of gelatinous zooplankton biodiversity and distribution in the rapidly changing Arctic Ocean, 12 stations were sampled across the Canada Basin, Northwind Ridge, and Chukchi Plateau with detailed deep-water ROV observations and multinet tows down to 3000 m. The complex, multi-origin water layers of the Arctic Ocean provided the backdrop for examining the vertical and horizontal distributions of the poorly understood meso and bathypelagic gelatinous taxa. Over 50 different gelatinous taxa were observed across the stations, with cnidarians being the most common group. Medusae accounted for 60% of all observations, siphonophores for 24%, larvaceans for 10%, ctenophores for 5%, and numerous interesting and rarer taxa constituted the remaining 1% of observations. Several new species were found and many major range extensions were observed. Both the vertical and horizontal distribution of species appear to be linked to water mass characteristics, as well as bottom topography and geographic location within the study area. Shallow slope and ridge areas around the Canada Basin and Chukchi Plateau appear to harbor substantially lower gelatinous zooplankton biomass and diversity than the deeper locations. Shallow stations not only show reduced abundance, but also different relative abundance of the major taxa, where the shallow water stations are dominated by large numbers of siphonophores and ctenophores, the deep stations are dominated by medusae. Taxonomic issues and ecological observations of several important species are discussed, aided by the live collection of many undamaged and fragile species. © 2009 Elsevier Ltd. All rights reserved.
Garcia-Garcia A.,University of California at Santa Cruz |
Garcia-Garcia A.,Monterey Peninsula College |
Levey M.D.,SeaSpatial Consulting |
Watson E.B.,U.S. Environmental Protection Agency
Continental Shelf Research | Year: 2013
The seismic analysis of the sedimentary infill of the Elkhorn Slough, central California, reveals a succession of three main seismic units: U1, U2, U3, with their correspondent discontinuities d2, d3. These units are deposited over a paleorelief representing the channel location at least 8k years ago. The location of that paleochannel has not changed with time, but the geometry of the infilling sedimentary packages has done so through the years. Discontinuities d2 and d3 show a relic island or relative high in the center of the Slough that separated the sedimentation into two main small basins at least 3k years ago. There is evidence of erosion in the last two sedimentary units showing that the present erosive pattern began decades ago at minimum. We have correlated radiocarbon data of selected cores with the high resolution chirp profiles and reconstructed the infill for the Elkhorn Slough.In the most recent unit, the occurrence of numerous lateral accretion surfaces on both ends of the main channel is discussed within their environmental setting, tidal currents and the net ebb flux of the area. We have interpreted the presence of gas in the sediments of the slough, with a gas front located at the tops of units 2 and 3, which are discontinuities that reflect an effective seal for the gas. Our data shows no obvious evidence for seepage, although the shallow presence of some of the fronts points out the fragility of the environment in the present erosive conditions. © 2013 Elsevier Ltd.
Agency: NSF | Branch: Standard Grant | Program: | Phase: Polar Special Initiatives | Award Amount: 1.74M | Year: 2011
The Marine Advanced Technology Education (MATE) Center is a national partnership of community colleges, high schools, universities, informal educational organizations, research institutions, marine industries, professional societies, and working professionals. MATEs mission is to improve marine technical education and increase the number of highly-skilled technical professionals who enter ocean-related occupations. The Center characterizes and researches trends in the ocean workforce, identifies the knowledge and skills this workforce needs, places this information in the hands of educational institutions at all levels, and works to ensure that curricula and programs are appropriately preparing students to meet workforce needs. MATEs programs represent unique approaches to engaging students in STEM learning experiences and developing the capacity for increasing the nations technological workforce. The geographic distribution of MATE partners makes products of this Center available to a broad audience; the strategies developed as a result of MATEs research into barriers of participation help to engage and involve traditionally underrepresented groups. These efforts prepare a diverse workforce that ensures U.S. competitiveness in a global economy that is currently, and increasingly, dependent on ocean activities.