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University of New Hampshire

2010

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Articles 31 - 60 of 66

Full-Text Articles in Physical Sciences and Mathematics

Unh Eelgrass (Zostera Marina) Monitoring Program For 2010-2014: Quality Assurance Project Plan, Frederick T. Short, Phil Trowbridge Jul 2010

Unh Eelgrass (Zostera Marina) Monitoring Program For 2010-2014: Quality Assurance Project Plan, Frederick T. Short, Phil Trowbridge

PREP Reports & Publications

Eelgrass (Zostera marina) is essential to estuarine ecology because it filters nutrients and suspended particles from water, stabilizes sediments, provides food for wintering waterfowl, and provides habitat for juvenile fish and shellfish, as well as being the basis of an important estuarine food web. Healthy eelgrass both depends on and contributes to good water quality. The UNH Seagrass Ecology Lab, has mapped the distribution of eelgrass every year from 1986 through 2009 in the Great Bay. The entire Great Bay Estuary (Great Bay, Little Bay, tidal tributaries, Piscataqua River, Little Harbor, and Portsmouth Harbor) was mapped by these researchers in …

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Do Scientists Agree About Climate Change? Public Perceptions From A New Hampshire Survey, Lawrence C. Hamilton Jul 2010

Do Scientists Agree About Climate Change? Public Perceptions From A New Hampshire Survey, Lawrence C. Hamilton

The Carsey School of Public Policy at the Scholars' Repository

This report, a collaboration of the Carsey Institute, the UNH Survey Center, and the UNH Office of Sustainability, is the first of a new initiative that will track public perceptions about climate change as they change over time. Questions related to climate change were asked as part of New Hampshire's Granite State Poll, which surveyed 512 New Hampshire residents in April 2010.

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Geodatabase Development To Support Hyperspectral Imagery Exploitation, Robert A. Fusina, John C. Fry, C Reid Nichols, Charles M. Bachmann, Rong-Rong Li, Jon Sellars, Christopher Parrish, Marcos J. Montes, Carl Gross, Stephen A. White, Krista Lee, Christopher A. Jones Jul 2010

Geodatabase Development To Support Hyperspectral Imagery Exploitation, Robert A. Fusina, John C. Fry, C Reid Nichols, Charles M. Bachmann, Rong-Rong Li, Jon Sellars, Christopher Parrish, Marcos J. Montes, Carl Gross, Stephen A. White, Krista Lee, Christopher A. Jones

Center for Coastal and Ocean Mapping

Geodatabase development for coastal studies conducted by the Naval Research Laboratory (NRL) is essential to support the exploitation of hyperspectral imagery (HSI). NRL has found that the remote sensing and mapping science community benefits from coastal classifications that group coastal types based on similar features. Selected features in project geodatabases relate to significant biological and physical forces that shape the coast. The project geodatabases help researchers understand factors that are necessary for imagery post processing, especially those features having a high degree of temporal and spatial variability. NRL project geodatabases include a hierarchy of environmental factors that extend from shallow …

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Is New Hampshire's Climate Warming?, Lawrence C. Hamilton, Barry D. Keim, Cameron P. Wake Jul 2010

Is New Hampshire's Climate Warming?, Lawrence C. Hamilton, Barry D. Keim, Cameron P. Wake

The Carsey School of Public Policy at the Scholars' Repository

This Carsey brief looks at temperature anomalies across New Hampshire and shows that not only is the state warmer than it has been in the past, but it is also warming faster than much of the planet. Sociologist Lawrence Hamilton, research associate professor Cameron Wake, and former NH state climatologist Barry Keim analyzed over 100 years of temperatures across the state to produce this data for the Carsey Institute in August 2010.

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U.S. Law Of The Sea Cruise To Map The Southern Flank Of The Kingman Reef-Palmyra Atoll Section Of The Line Islands, Equatorial Pacific Ocean, James V. Gardner, Brian R. Calder Jun 2010

U.S. Law Of The Sea Cruise To Map The Southern Flank Of The Kingman Reef-Palmyra Atoll Section Of The Line Islands, Equatorial Pacific Ocean, James V. Gardner, Brian R. Calder

Center for Coastal and Ocean Mapping

U.S. Law of the Sea Cruise to Map the Southern Flank of the Kingman Reef-Palmyra Atoll section of the Line Islands, Equatorial Pacific Ocean CRUISE KM1009 May 17, to June 16, 2010 Pago Pago, American Samoa to Honolulu, HI

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The Arctic Research Of The Composition Of The Troposphere From Aircraft And Satellites (Arctas) Mission: Design, Execution, And First Results, D J. Jacob, J H. Crawford, H Maring, A D. Clarke, Jack E. Dibb, L K. Emmons, R A. Ferrare, C A. Hostetler, Phil Russell, H B. Singh, A M. Thompson, G E. Shaw, E Mccauley, Judith Pederson, Jenny Fisher Jun 2010

The Arctic Research Of The Composition Of The Troposphere From Aircraft And Satellites (Arctas) Mission: Design, Execution, And First Results, D J. Jacob, J H. Crawford, H Maring, A D. Clarke, Jack E. Dibb, L K. Emmons, R A. Ferrare, C A. Hostetler, Phil Russell, H B. Singh, A M. Thompson, G E. Shaw, E Mccauley, Judith Pederson, Jenny Fisher

Earth Sciences

The NASA Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) mission was conducted in two 3-week deployments based in Alaska (April 2008) and western Canada (June–July 2008). Its goal was to better understand the factors driving current changes in Arctic atmospheric composition and climate, including (1) influx of mid-latitude pollution, (2) boreal forest fires, (3) aerosol radiative forcing, and (4) chemical processes. The June–July deployment was preceded by one week of flights over California (ARCTAS-CARB) focused on (1) improving state emission inventories for greenhouse gases and aerosols, (2) providing observations to test and improve models …

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Structure And Oscillatory Multilayer Relaxation Of The Bismuth (100) Surface, J. Sun, J. Wang, J. Wells, Y. M. Koroteev, G. Bihlmayer, E. V. Chulkov, Ph Hofmann, Karsten Pohl Jun 2010

Structure And Oscillatory Multilayer Relaxation Of The Bismuth (100) Surface, J. Sun, J. Wang, J. Wells, Y. M. Koroteev, G. Bihlmayer, E. V. Chulkov, Ph Hofmann, Karsten Pohl

Physics & Astronomy

We present a combined experimental and theoretical study of the surface structure of single crystal Bi(100) via scanning tunneling microscopy (STM), low-energy electron diffraction intensity versus energy (LEED-IV) analysis and density functional theory (DFT). We find that the surface is unreconstructed and shows an unusually large oscillatory multilayer relaxation down to the sixth layer. This unexpected behavior will be explained by a novel mechanism related to the deeply penetrating electronic surface states. STM reveals wide (100) terraces, which are separated by two-layer high steps in which the shorter of the two interlayer spacings is terminating this surface, consistent with the …

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Hydrographic Products/Services As A Fundamental Component Of The E-Navigation Concept Of Operation, Lee Alexander, Robert Ward Jun 2010

Hydrographic Products/Services As A Fundamental Component Of The E-Navigation Concept Of Operation, Lee Alexander, Robert Ward

Center for Coastal and Ocean Mapping

e-Navigation is a recent initiative aimed at moving traditional maritime navigation towards a connected digital environment. Defined by the International Maritime Organization (IMO) as “the harmonized collection, integration, exchange, presentation and analysis of maritime information onboard and ashore by electronic means to enhance birth-to-birth navigation and related services, for safety and security at sea and protection of the marine environment”, e-Navigation is not a new system of equipment but more an operational concept. Three significant outcomes are envisioned: 1) Shipboard navigation systems will benefit from the integration of own ship sensors, supporting information, standard user interface, and a comprehensive system …

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Application Of Jpeg 2000 Wavelet Compression To Multibeam Echosounder Mid-Water Acoustic Refectivity Measurements, Jonathan Beaudoin Jun 2010

Application Of Jpeg 2000 Wavelet Compression To Multibeam Echosounder Mid-Water Acoustic Refectivity Measurements, Jonathan Beaudoin

Center for Coastal and Ocean Mapping

No abstract provided.

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New Approaches For Evaluating Lidar-Derived Shoreline, Christopher Parrish, Stephen A. White, Brian R. Calder, Shachak Pe'eri, Yuri Rzhanov Jun 2010

New Approaches For Evaluating Lidar-Derived Shoreline, Christopher Parrish, Stephen A. White, Brian R. Calder, Shachak Pe'eri, Yuri Rzhanov

Center for Coastal and Ocean Mapping

This study presents and compares two new methods of assessing the uncertainty of lidar-derived National Shoreline mapped by NOAA’s National Geodetic Survey: an empirical (ground-based) approach and a stochastic (Monte Carlo) approach. OCIS codes: (280.3640) Lidar; (120.2830) Height measurements; (000.4430) Numerical approximation and analysis

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Simulating An Airborne Lidar Bathymetry (Alb) System, Shachak Pe'eri, Amaresh M. Kumar, Brian R. Calder Jun 2010

Simulating An Airborne Lidar Bathymetry (Alb) System, Shachak Pe'eri, Amaresh M. Kumar, Brian R. Calder

Center for Coastal and Ocean Mapping

This study’s focus is on the horizontal and vertical uncertainties associated with ALB measurements due to scattering through the water column. A lidar simulator was constructed and we present its design and preliminary results.

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Modeling Radiation Belt Radial Diffusion In Ulf Wave Fields: 2. Estimating Rates Of Radial Diffusion Using Combined Mhd And Particle Codes, Chia-Lin L. Huang, Harlan E. Spence, Mary K. Hudson, Scot R. Elkington Jun 2010

Modeling Radiation Belt Radial Diffusion In Ulf Wave Fields: 2. Estimating Rates Of Radial Diffusion Using Combined Mhd And Particle Codes, Chia-Lin L. Huang, Harlan E. Spence, Mary K. Hudson, Scot R. Elkington

Physics & Astronomy

[1] Quantifying radial transport of radiation belt electrons in ULF wave fields is essential for understanding the variability of the trapped relativistic electrons. To estimate the radial diffusion coefficients (DLL), we follow MeV electrons in realistic magnetospheric configurations and wave fields calculated from a global MHD code. We create idealized pressure-driven MHD simulations for controlled solar wind velocities (hereafter referred to as pressure-driven Vx simulations) with ULF waves that are comparable to GOES data under similar conditions, by driving the MHD code with synthetic pressure profiles that mimic the pressure variations of a particular solar wind velocity. The ULF wave …

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Modeling Radiation Belt Radial Diffusion In Ulf Wave Fields: 1. Quantifying Ulf Wave Power At Geosynchronous Orbit In Observations And In Global Mhd Model, Chia-Lin L. Huang, Harlan E. Spence, Howard J. Singer, W. Jeffrey Hughes Jun 2010

Modeling Radiation Belt Radial Diffusion In Ulf Wave Fields: 1. Quantifying Ulf Wave Power At Geosynchronous Orbit In Observations And In Global Mhd Model, Chia-Lin L. Huang, Harlan E. Spence, Howard J. Singer, W. Jeffrey Hughes

Physics & Astronomy

[1] To provide critical ULF wave field information for radial diffusion studies in the radiation belts, we quantify ULF wave power (f = 0.5–8.3 mHz) in GOES observations and magnetic field predictions from a global magnetospheric model. A statistical study of 9 years of GOES data reveals the wave local time distribution and power at geosynchronous orbit in field-aligned coordinates as functions of wave frequency, solar wind conditions (Vx, ΔPd and IMF Bz) and geomagnetic activity levels (Kp, Dst and AE). ULF wave power grows monotonically with increasing solar wind Vx, dynamic pressure variations ΔPd and geomagnetic indices in a …

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Seamless Online Distribution Of Amundsen Multibeam Data, James Muggah, Ian Church, Jonathan Beaudoin, John E. Hughes Clarke Jun 2010

Seamless Online Distribution Of Amundsen Multibeam Data, James Muggah, Ian Church, Jonathan Beaudoin, John E. Hughes Clarke

Center for Coastal and Ocean Mapping

Since 2003, all underway multibeam and sub-bottom data from the Canadian Coast Guard Ship Amundsen has been posted online within approximately six months of the end of each cruise. A custom interface allowing the user to access 15' latitude by 30' longitude mapsheets was implemented in 2006, allowing the user to download the bathymetric and backscatter data at 10 metre resolution. While this interface matched the underlying data management scheme implemented at the University of New Brunswick, the zoom and pan capability was at a fixed scale with limited contextual data. In the past few years, with the introduction of …

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Modeling The Effect Of Oceanic Internal Waves On The Accuracy Of Multibeam Echosounders, Travis Hamilton, Jonathan Beaudoin Jun 2010

Modeling The Effect Of Oceanic Internal Waves On The Accuracy Of Multibeam Echosounders, Travis Hamilton, Jonathan Beaudoin

Center for Coastal and Ocean Mapping

When ray bending corrections are applied to multibeam echosounder (MBES) data, it is assumed that the varying layers of sound speed lie along horizontally stratified planes. In many areas internal waves occur at the interface where the water’s density changes abruptly (a pycnocline), this density gradient is often associated with a strong gradient in sound speed (a velocline). The internal wave introduces uncertainty into the echo soundings through two mechanisms: (1) tilting of the velocline, and (2) vertical oscillation of the velocline’s depth. A model has been constructed in order to examine how these effects degrade the accuracy of MBES …

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4d Multimodal Visualization And Analysis Of Seafloor Vents And Plumes, Maurice Doucet, Mark Paton, James V. Gardner, Jens Greinert Jun 2010

4d Multimodal Visualization And Analysis Of Seafloor Vents And Plumes, Maurice Doucet, Mark Paton, James V. Gardner, Jens Greinert

Center for Coastal and Ocean Mapping

No abstract provided.

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Convective Distribution Of Tropospheric Ozone And Tracers In The Central American Itcz Region: Evidence From Observations During Tc4, M A. Avery, Cynthia Twohy, David Mccabe, J Joiner, Kurt Severance, E L. Atlas, D R. Blake, T P. Bui, John D. Crounse, Jack E. Dibb, Glenn Diskin, Paul Lawson, Matthew Mcgill, David Rogers, G W. Sachse, Eric Scheuer, A M. Thompson, Charles Trepte, Paul Wennberg, Jerald Ziemke May 2010

Convective Distribution Of Tropospheric Ozone And Tracers In The Central American Itcz Region: Evidence From Observations During Tc4, M A. Avery, Cynthia Twohy, David Mccabe, J Joiner, Kurt Severance, E L. Atlas, D R. Blake, T P. Bui, John D. Crounse, Jack E. Dibb, Glenn Diskin, Paul Lawson, Matthew Mcgill, David Rogers, G W. Sachse, Eric Scheuer, A M. Thompson, Charles Trepte, Paul Wennberg, Jerald Ziemke

Earth Sciences

During the Tropical Composition, Clouds and Climate Coupling (TC4) experiment that occurred in July and August of 2007, extensive sampling of active convection in the ITCZ region near Central America was performed from multiple aircraft and satellite sensors. As part of a sampling strategy designed to study cloud processes, the NASA ER‐2, WB‐57 and DC‐8 flew in stacked “racetrack patterns” in convective cells. On July 24, 2007, the ER‐2 and DC‐8 probed an actively developing storm and the DC‐8 was hit by lightning. Case studies of this flight, and of convective outflow on August 5, 2007 reveal a significant anti‐correlation …

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Evidence Of Nitric Acid Uptake In Warm Cirrus Anvil Clouds During The Nasa Tc4 Campaign, Eric Scheuer, Jack E. Dibb, Cynthia Twohy, David Rogers, Andrew J. Heymsfield, Aaron Bansemer May 2010

Evidence Of Nitric Acid Uptake In Warm Cirrus Anvil Clouds During The Nasa Tc4 Campaign, Eric Scheuer, Jack E. Dibb, Cynthia Twohy, David Rogers, Andrew J. Heymsfield, Aaron Bansemer

Earth Sciences

Uptake of HNO3 onto cirrus ice may play an important role in tropospheric NOx cycling. Discrepancies between modeled and in situ measurements of gas-phase HNO3 in the troposphere suggest that redistribution and removal mechanisms by cirrus ice have been poorly constrained. Limited in situ measurements have provided somewhat differing results and are not fully compatible with theory developed from laboratory studies. We present new airborne measurements of HNO3 in cirrus clouds from anvil outflow made during the Tropical Composition, Cloud, and Climate Coupling Experiment (TC4). Upper tropospheric (>9 km) measurements made during three flights while repeatedly traversing the same …

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New Standards For Providing Meteorological And Hydrographic Information Via Ais Application-Specific Messages, Lee Alexander, Schwehr Kurt May 2010

New Standards For Providing Meteorological And Hydrographic Information Via Ais Application-Specific Messages, Lee Alexander, Schwehr Kurt

Center for Coastal and Ocean Mapping

AIS Application-specific messages transmitted in binary format will be increasingly used to digitally communicate maritime safety/security information between participating vessels and shore stations. This includes time-sensitive meteorological and hydrographic information that is critical for safe vessel transits and efficient ports/waterways management. IMO recently completed a new Safety-of-Navigation Circular (SN/Circ.) that includes a number of meteorologi-cal and hydrographic message applications and data parameters. In conjunction with the development of a new SN/Circ., IMO will establish an International Application (IA) Register for AIS Application-Specific Messages. IALA plans to establish a similar register for regional appli-cations. While there are no specific standards for …

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Galactic Cosmic Ray Radiation Hazard In The Unusual Extended Solar Minimum Between Solar Cycles 23 And 24, Nathan A. Schwadron, A. J. Boyd, K. Kozarev, M. Golightly, Harlan E. Spence, L. W. Townsend, M. Owens May 2010

Galactic Cosmic Ray Radiation Hazard In The Unusual Extended Solar Minimum Between Solar Cycles 23 And 24, Nathan A. Schwadron, A. J. Boyd, K. Kozarev, M. Golightly, Harlan E. Spence, L. W. Townsend, M. Owens

Physics & Astronomy

[1] Galactic cosmic rays (GCRs) are extremely difficult to shield against and pose one of the most severe long-term hazards for human exploration of space. The recent solar minimum between solar cycles 23 and 24 shows a prolonged period of reduced solar activity and low interplanetary magnetic field strengths. As a result, the modulation of GCRs is very weak, and the fluxes of GCRs are near their highest levels in the last 25 years in the fall of 2009. Here we explore the dose rates of GCRs in the current prolonged solar minimum and make predictions for the Lunar Reconnaissance …

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Impact Of Mineral Dust On Nitrate, Sulfate, And Ozone In Transpacific Asian Pollution Plumes, T D. Fairlie, D J. Jacob, Jack E. Dibb, B Alexander, M A. Avery, Aaron Van Donkelaar, L Zhang Apr 2010

Impact Of Mineral Dust On Nitrate, Sulfate, And Ozone In Transpacific Asian Pollution Plumes, T D. Fairlie, D J. Jacob, Jack E. Dibb, B Alexander, M A. Avery, Aaron Van Donkelaar, L Zhang

Earth Sciences

We use a 3-D global chemical transport model (GEOS-Chem) to interpret aircraft observations of nitrate and sulfate partitioning in transpacific dust plumes during the INTEX-B campaign of April–May 2006. The model includes explicit transport of size-resolved mineral dust and its alkalinity, nitrate, and sulfate content. The observations show that particulate nitrate is primarily associated with dust, sulfate is primarily associated with ammonium, and Asian dust remains alkaline across the Pacific. This can be reproduced in the model by using a reactive uptake coefficient for HNO3 on dust (γ(HNO3) ~10−3) much lower than commonly assumed in …

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“Taking Stocc”: Tracking Environmental And Financial Footprints Associated With Municipal Energy Use, Corey Johnson Apr 2010

“Taking Stocc”: Tracking Environmental And Financial Footprints Associated With Municipal Energy Use, Corey Johnson

Inquiry Journal 2010

No abstract provided.

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Sea State Bias In Altimeter Sea Level Estimates Determined By Combining Wave Model And Satellite Data, N. Tran, Douglas C. Vandemark, S. Labroue, Hui Feng, Bertrand Chapron, H. L. Tolman, J. Lambin, N. Picot Mar 2010

Sea State Bias In Altimeter Sea Level Estimates Determined By Combining Wave Model And Satellite Data, N. Tran, Douglas C. Vandemark, S. Labroue, Hui Feng, Bertrand Chapron, H. L. Tolman, J. Lambin, N. Picot

Ocean Process Analysis Laboratory

This study documents a method for increasing the precision of satellite-derived sea level measurements. Results are achieved using an enhanced three-dimensional (3-D) sea state bias (SSB) correction model derived from both Jason-1 altimeter ocean observations (i.e., sea state and wind) and estimates of mean wave period from a numerical ocean wave model, NOAA’s WAVEWATCH III. A multiyear evaluation of Jason-1 data indicates sea surface height variance reduction of 1.26 (±0.2) cm2 in comparison to the commonly applied two-parameter SSB model. The improvement is similar for two separate variance reduction metrics and for separate annual data sets spanning 2002–2004. Spatial evaluation …

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Parameterizations Of The Linear Energy Transfer Spectrum For The Crater Instrument During The Lro Mission, L. W. Townsend, Y. M. Charara, N. Delauder, M. Pourarsalan, J. A. Anderson, C. M. Fisher, Harlan E. Spence, Nathan A. Schwadron, M. J. Golightly, F. A. Cucinotta Mar 2010

Parameterizations Of The Linear Energy Transfer Spectrum For The Crater Instrument During The Lro Mission, L. W. Townsend, Y. M. Charara, N. Delauder, M. Pourarsalan, J. A. Anderson, C. M. Fisher, Harlan E. Spence, Nathan A. Schwadron, M. J. Golightly, F. A. Cucinotta

Physics & Astronomy

[1] The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) instrument was launched as part of the Lunar Reconnaissance Orbiter (LRO) spacecraft in June 2009. Its purpose is to measure the linear energy transfer (LET) spectrum in lunar orbit as an aid in determining risks to human crews on future lunar missions. Part of the preparations for the mission involved estimating the LET spectrum for the anticipated environment that the instrument is likely to see during the 1 year operational phase of the LRO mission. Detailed estimates of LET spectra in the six silicon detectors and two tissue equivalent …

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Further Analysis Of A Cooper Pair Insulator, Shawna M. Hollen, H Q. Nguyen, M D. Stewart Jr, J Shainline, Aijun Jin, J M. Valles Jr. Mar 2010

Further Analysis Of A Cooper Pair Insulator, Shawna M. Hollen, H Q. Nguyen, M D. Stewart Jr, J Shainline, Aijun Jin, J M. Valles Jr.

Physics & Astronomy

No abstract provided.

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A Regional Scale Modeling Analysis Of Aerosol And Trace Gas Distributions Over The Eastern Pacific During The Intex-B Field Campaign, B Adhikary, Gregory R. Carmichael, S Kulkarni, C Wei, Y Tang, A D'Allura, M Mena-Carrasco, David G. Streets, Q Zhang, R B. Pierce, J Al-Saadi, L K. Emmons, G G. Pfister, M A. Avery, J D. Barrick, D R. Blake, William H. Brune, Robert C. Cohen, Jack E. Dibb, A Fried, B J. Heikes, L Gregory Huey, D W. O'Sullivan, G W. Sachse, R E. Shetter, H B. Singh, T L. Campos, C A. Cantrell, F Flocke, E J. Dunlea, Jose L. Jimenez, Andrew Weinheimer, John D. Crounse, Paul Wennberg, James J. Schauer, E A. Stone, D A. Jaffe, D R. Reidmiller Mar 2010

A Regional Scale Modeling Analysis Of Aerosol And Trace Gas Distributions Over The Eastern Pacific During The Intex-B Field Campaign, B Adhikary, Gregory R. Carmichael, S Kulkarni, C Wei, Y Tang, A D'Allura, M Mena-Carrasco, David G. Streets, Q Zhang, R B. Pierce, J Al-Saadi, L K. Emmons, G G. Pfister, M A. Avery, J D. Barrick, D R. Blake, William H. Brune, Robert C. Cohen, Jack E. Dibb, A Fried, B J. Heikes, L Gregory Huey, D W. O'Sullivan, G W. Sachse, R E. Shetter, H B. Singh, T L. Campos, C A. Cantrell, F Flocke, E J. Dunlea, Jose L. Jimenez, Andrew Weinheimer, John D. Crounse, Paul Wennberg, James J. Schauer, E A. Stone, D A. Jaffe, D R. Reidmiller

Earth Sciences

The Sulfur Transport and dEposition Model (STEM) is applied to the analysis of observations obtained during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B), conducted over the eastern Pacific Ocean during spring 2006. Predicted trace gas and aerosol distributions over the Pacific are presented and discussed in terms of transport and source region contributions. Trace species distributions show a strong west (high) to east (low) gradient, with the bulk of the pollutant transport over the central Pacific occurring between ∼20° N and 50° N in the 2-6 km altitude range. These distributions are evaluated in the eastern Pacific by comparison with …

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Establishing A Regional Ais Application Specific Message Register, Lee Alexander, Kurt Schwehr, R Zetterberg Mar 2010

Establishing A Regional Ais Application Specific Message Register, Lee Alexander, Kurt Schwehr, R Zetterberg

Center for Coastal and Ocean Mapping

The goal of the Regional AIS Application Specific Message Register is to provide awareness of what applications exist, facilitate harmonization, and promote proper binary messaging for regional applications. To be hosted on the IALA website, establishing the Register will be a 3-step process: 1) Compile all existing AIS binaries into a Jcollection.K 2) Convert the JcollectionK into a Register. 3) Develop IALA guidance on best practices for creating and using AIS Binary Messages. Recommendations are provided in regard to: - Benefit of a web-based HTML user interface for input/output. - Use of XML to organize/format register applications in a consistent …

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Numerical Investigation Of Aeroelastic Mode Distribution For Aircraft Wing Model In Subsonic Air Flow, Marianna A. Shubov, Stephen B. Wineberg, Robert Holt Jan 2010

Numerical Investigation Of Aeroelastic Mode Distribution For Aircraft Wing Model In Subsonic Air Flow, Marianna A. Shubov, Stephen B. Wineberg, Robert Holt

Mathematics & Statistics

In this paper, the numerical results on two problems originated in aircraft wing modeling have been presented. The first problem is concerned with the approximation to the set of the aeroelastic modes, which are the eigenvalues of a certain boundary-value problem. The affirmative answer is given to the following question: can the leading asymptotical terms in the analytical formulas be used as reasonably accurate description of the aeroelastic modes? The positive answer means that these leading terms can be used by engineers for practical calculations. The second problem is concerned with the flutter phenomena in aircraft wings in a subsonic, …

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Marine Benthic Habitat Mapping Of Muir Inlet, Glacier Bay National Park And Preserve, Alaska With An Evaluation Of The Coastal And Marine Ecological Classification Standard Iii, Luke D. Mitchell, Guy R. Cochrane, Lisa Etherington, Ross D. Powell, Larry A. Mayer Jan 2010

Marine Benthic Habitat Mapping Of Muir Inlet, Glacier Bay National Park And Preserve, Alaska With An Evaluation Of The Coastal And Marine Ecological Classification Standard Iii, Luke D. Mitchell, Guy R. Cochrane, Lisa Etherington, Ross D. Powell, Larry A. Mayer

Center for Coastal and Ocean Mapping

Seafloor geology and potential benthic habitats were mapped in Muir Inlet, Glacier Bay National Park and Preserve, Alaska, using multibeam sonar, ground-truth information, and geological interpretations. Muir Inlet is a recently deglaciated fjord that is under the influence of glacial and paraglacial marine processes. High glacially derived sediment and meltwater fluxes, slope instabilities, and variable bathymetry result in a highly dynamic estuarine environment and benthic ecosystem. We characterize the fjord seafloor and potential benthic habitats using the Coastal and Marine Ecological Classification Standard (CMECS) recently developed by the National Oceanic and Atmospheric Administration (NOAA) and NatureServe. Substrates within Muir Inlet …

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Blue Carbon: The Role Of Healthy Oceans In Binding Carbon, Christian Nellemann, Emily Corcoran, Carlos M. Duarte, Cassandra De Young, Luciano E. Fonseca, Gabriel Grimsdith Jan 2010

Blue Carbon: The Role Of Healthy Oceans In Binding Carbon, Christian Nellemann, Emily Corcoran, Carlos M. Duarte, Cassandra De Young, Luciano E. Fonseca, Gabriel Grimsdith

Center for Coastal and Ocean Mapping

No abstract provided.

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