The Experts below are selected from a list of 1581 Experts worldwide ranked by ideXlab platform
Barbara Sugiyama - One of the best experts on this subject based on the ideXlab platform.
-
Predicting the Mobility and Burial of Underwater Unexploded Ordnance (UXO) Using the UXO Mobility Model (ESTCP) 200417
2009Co-Authors: Jeffrey V. Wilson, Alexandra Devisser, Barbara SugiyamaAbstract:Abstract : The ESTCP Unexploded Ordnance (UXO) Mobility Model (MM) validation program expanded the capabilities of the vortex lattice based model previously developed by the Navy for mine modeling applications and then validated the MM with surrogate ordnance in two instrumented field demonstration, one in each of the most common coastal environmental types (Trailing Edge and Biogenic Reef):U.S. Army Filed Research Facility (FRF), Duck, NC, and pacific Missile Range Facility (PMRF), Kauai, HI. The MM correctly predicted all the basic behaviors of the surrogates; the skill factor for modeling migration and burial exceeded 0.8 in both cases, a favorable result with respect to modeling coastal processes and mine burial prediction. The MM is calibrated for the most common coastal environmental and can use wither default environmental conditions or site-specific data inputs to more accurately predict overall probability of movement. It is noted that the primary cost drivers for varying levels of analysis is predicated on the amount of site data available.
-
Predicting the Mobility and Burial of Underwater Unexploded Ordnance (UXO) using the UXO Mobility Model. Field Test Report (PMRF Barking Sands, Kauai, Hawaii)
2008Co-Authors: Jeffrey V. Wilson, Scott A. Jenkins, Joseph Wasyl, Alexandra Devisser, Barbara SugiyamaAbstract:Abstract : A process-based underwater unexploded ordinance (UXO) Mobility Model (MM) was developed and exercised with field measurements obtained at two separate offshore sites in a Biogenic Reef environment off the west coast of the island of Kauai, HI, at the Pacific Missile Range Facility (PMRF), Barking Sands. The MM was used to generate hydrodynamic forcing, UXO migration, and UXO burial simulations that were in general agreement with the ensemble results from 24 inert surrogate 5?/38 projectiles that were monitored between 13 February and 27 June 2007.
Chenglong Deng - One of the best experts on this subject based on the ideXlab platform.
-
Astronomical tuning and magnetostratigraphy of Neogene Biogenic Reefs in Xisha Islands, South China Sea
Science Bulletin, 2018Co-Authors: Zhimin Jian, Xinyu Liu, Youhua Zhu, Daojun Zhang, Zhenfeng Wang, Chenglong DengAbstract:Biogenic Reefs are one of two major depositional types in the South China Sea, and are constructed by coral, algae and bryozoa. The West Pacific is a major area of Biogenic Reef development and plays a critical role in the global carbon cycle. However, the lack of geochronological studies in previous works inhibits our understanding of their contributions. Herein, we conduct a cyclostratigraphic and magnetostratigraphic study on Neogene Biogenic Reefs using the XK-1 core that was drilled at the Shidao Island, Xisha (Paracel) Islands. The main findings of this study are: (1) the establishment of reliable magentostratigraphy for Ledong, Huangliu, Meishan and Sanya Formations; (2) the magnetic susceptibility variation can be inferred as growth index and tuned to the 405-ka long eccentricity cycle; (3) the astronomical geochronology suggests that the bottom ages for Ledong, Yinggehai, Huangliu, Meishan, and Sanya Formations are 2.2 Ma, 5.7 Ma, 10.4 Ma, 16.6 Ma, and 24.3 Ma, respectively; and (4) Earths eccentricity and obliquity played predominant roles in Biogenic Reef establishment on orbital to tectonic timescales. Thus, the reported geochronology offers an opportunity to test the contributions of various factors and hypothesize their roles in the global carbon cycle in future.
Jeffrey V. Wilson - One of the best experts on this subject based on the ideXlab platform.
-
Predicting the Mobility and Burial of Underwater Unexploded Ordnance (UXO) Using the UXO Mobility Model (ESTCP) 200417
2009Co-Authors: Jeffrey V. Wilson, Alexandra Devisser, Barbara SugiyamaAbstract:Abstract : The ESTCP Unexploded Ordnance (UXO) Mobility Model (MM) validation program expanded the capabilities of the vortex lattice based model previously developed by the Navy for mine modeling applications and then validated the MM with surrogate ordnance in two instrumented field demonstration, one in each of the most common coastal environmental types (Trailing Edge and Biogenic Reef):U.S. Army Filed Research Facility (FRF), Duck, NC, and pacific Missile Range Facility (PMRF), Kauai, HI. The MM correctly predicted all the basic behaviors of the surrogates; the skill factor for modeling migration and burial exceeded 0.8 in both cases, a favorable result with respect to modeling coastal processes and mine burial prediction. The MM is calibrated for the most common coastal environmental and can use wither default environmental conditions or site-specific data inputs to more accurately predict overall probability of movement. It is noted that the primary cost drivers for varying levels of analysis is predicated on the amount of site data available.
-
Predicting the Mobility and Burial of Underwater Unexploded Ordnance (UXO) using the UXO Mobility Model. Field Test Report (PMRF Barking Sands, Kauai, Hawaii)
2008Co-Authors: Jeffrey V. Wilson, Scott A. Jenkins, Joseph Wasyl, Alexandra Devisser, Barbara SugiyamaAbstract:Abstract : A process-based underwater unexploded ordinance (UXO) Mobility Model (MM) was developed and exercised with field measurements obtained at two separate offshore sites in a Biogenic Reef environment off the west coast of the island of Kauai, HI, at the Pacific Missile Range Facility (PMRF), Barking Sands. The MM was used to generate hydrodynamic forcing, UXO migration, and UXO burial simulations that were in general agreement with the ensemble results from 24 inert surrogate 5?/38 projectiles that were monitored between 13 February and 27 June 2007.
Justin T Ridge - One of the best experts on this subject based on the ideXlab platform.
-
classic paradigms in a novel environment inserting food web and productivity lessons from rocky shores and saltmarshes into Biogenic Reef restoration
Journal of Applied Ecology, 2014Co-Authors: Joel F Fodrie, Antonio B Rodriguez, Christopher J Baillie, Michelle C Brodeur, Sara E Coleman, Rachel K Gittman, Danielle A Keller, Matthew D Kenworthy, Abigail K Poray, Justin T RidgeAbstract:Summary Gradients in competition and predation that regulate communities should guide Biogenic habitat restoration, while restoration ecology provides opportunities to address fundamental questions regarding food web dynamics via large-scale field manipulations. We restored oyster Reefs across an aerial exposure gradient (shallow-subtidal-to-mid-intertidal) to explore how vertical gradients in natural settlement, growth and interspecific interactions affected the trajectory of man-made shellfish Reefs. We recorded nearly an order-of-magnitude higher oyster settlement on the deepest (subtidal) Reefs, but within a year abundance patterns reversed, and oyster densities were ultimately highest on the shallowest (intertidal) Reefs by over an order-of-magnitude. This reversal was due to (i) significantly elevated survivorship on intertidal Reefs and (ii) larger surviving oysters on intertidal Reefs. These patterns are likely to have developed from greater levels of biofouling and predator abundance (e.g. stone crabs, gastropods) on deeper Reefs where aerial exposure was <5% of the monthly tidal cycle. Synthesis and applications. The success of restoration initiatives involving habitat-forming species can be enhanced by accounting for the biotic interactions that regulate population fitness. In littoral systems, vertical gradients in predation, competition and disturbance can be exploited to guide restoration of vegetated (e.g. mangrove, seagrass) or Biogenic Reef habitats. In particular, our results demonstrate that paradigms of vertical zonation learned from the rocky intertidal and saltmarshes also describe the fate of restored shellfish Reefs. As with rocky shores, the lower vertical limit of adult oyster distribution in our study system was most likely driven by predatory and competitive (i.e. smothering) interactions, with a threshold depth at c. 5% daily aerial exposure. Below this depth, experimentally restored Reefs failed completely. As with Spartina saltmarsh, accumulation of oyster biomass was greatest at an intermediate vertical position relative to mean sea level (i.e. mid-to-low intertidal). Our developing model proscribes a vertical ‘hot spot’ for restoration efforts to maximize Biogenic Reef fitness and production.
-
Classic paradigms in a novel environment: inserting food web and productivity lessons from rocky shores and saltmarshes into Biogenic Reef restoration
Journal of Applied Ecology, 2014Co-Authors: F. Joel Fodrie, Antonio B Rodriguez, Christopher J Baillie, Michelle C Brodeur, Sara E Coleman, Rachel K Gittman, Danielle A Keller, Matthew D Kenworthy, Abigail K Poray, Justin T RidgeAbstract:Summary Gradients in competition and predation that regulate communities should guide Biogenic habitat restoration, while restoration ecology provides opportunities to address fundamental questions regarding food web dynamics via large-scale field manipulations. We restored oyster Reefs across an aerial exposure gradient (shallow-subtidal-to-mid-intertidal) to explore how vertical gradients in natural settlement, growth and interspecific interactions affected the trajectory of man-made shellfish Reefs. We recorded nearly an order-of-magnitude higher oyster settlement on the deepest (subtidal) Reefs, but within a year abundance patterns reversed, and oyster densities were ultimately highest on the shallowest (intertidal) Reefs by over an order-of-magnitude. This reversal was due to (i) significantly elevated survivorship on intertidal Reefs and (ii) larger surviving oysters on intertidal Reefs. These patterns are likely to have developed from greater levels of biofouling and predator abundance (e.g. stone crabs, gastropods) on deeper Reefs where aerial exposure was
Zhimin Jian - One of the best experts on this subject based on the ideXlab platform.
-
Astronomical tuning and magnetostratigraphy of Neogene Biogenic Reefs in Xisha Islands, South China Sea
Science Bulletin, 2018Co-Authors: Zhimin Jian, Xinyu Liu, Youhua Zhu, Daojun Zhang, Zhenfeng Wang, Chenglong DengAbstract:Biogenic Reefs are one of two major depositional types in the South China Sea, and are constructed by coral, algae and bryozoa. The West Pacific is a major area of Biogenic Reef development and plays a critical role in the global carbon cycle. However, the lack of geochronological studies in previous works inhibits our understanding of their contributions. Herein, we conduct a cyclostratigraphic and magnetostratigraphic study on Neogene Biogenic Reefs using the XK-1 core that was drilled at the Shidao Island, Xisha (Paracel) Islands. The main findings of this study are: (1) the establishment of reliable magentostratigraphy for Ledong, Huangliu, Meishan and Sanya Formations; (2) the magnetic susceptibility variation can be inferred as growth index and tuned to the 405-ka long eccentricity cycle; (3) the astronomical geochronology suggests that the bottom ages for Ledong, Yinggehai, Huangliu, Meishan, and Sanya Formations are 2.2 Ma, 5.7 Ma, 10.4 Ma, 16.6 Ma, and 24.3 Ma, respectively; and (4) Earths eccentricity and obliquity played predominant roles in Biogenic Reef establishment on orbital to tectonic timescales. Thus, the reported geochronology offers an opportunity to test the contributions of various factors and hypothesize their roles in the global carbon cycle in future.