Sedimentary and crustal structure of the US Gulf Coast revealed by Rayleigh wave and teleseismic P coda data with implications for continent rifting

2022 ◽  
Vol 577 ◽  
pp. 117257
Author(s):  
Wenpei Miao ◽  
Fenglin Niu ◽  
Guoliang Li ◽  
Alan Levander
Keyword(s):  
Rayleigh Wave ◽  
Crustal Structure ◽  
Gulf Coast ◽  
The Us

scholarly journals Transfluthrin Spatial Repellent on US Military Camouflage Netting Reduces Tabanids in a Warm-Temperate Environment

2020 ◽  
Vol 36 (3) ◽  
pp. 212-215
Author(s):  
S. C. Britch ◽  
D. L. Kline ◽  
K. J. Linthicum ◽  
J. Urban ◽  
E. Dickstein ◽  
...  
Keyword(s):  
Pest Management ◽  
Department Of Defense ◽  
Gulf Coast ◽  
Mechanical Transmission ◽  
Us Military ◽  
Field Environment ◽  
Spatial Repellent ◽  
The Us ◽  
Temperate Environment ◽  
Warm Temperate

ABSTRACT We investigated the capability of transfluthrin on US military camouflage netting to reduce collections of tabanid biting flies in a warm-temperate field environment on the Gulf Coast of Florida. We found that transfluthrin significantly reduced collections of a variety of medically and veterinarily important tabanids inside protected areas by up to 96% upon initial treatment and up to 74% after 20 days posttreatment. These results suggest that transfluthrin could be an effective element in the US Department of Defense integrated pest management system and leveraged in civilian scenarios to protect livestock and humans from potential mechanical transmission of pathogens and disruption of activities caused by painful bites.

Geomemory and Genre Friction: Infrastructural Violence and Plantation Afterlives in Contemporary African American Novels

2021 ◽  
Author(s):  
Rebecca Evans
Keyword(s):  
African American ◽  
Built Environment ◽  
Gulf Coast ◽  
American Fiction ◽  
Us South ◽  
American Novels ◽  
Spatial Design ◽  
The Uncanny ◽  
The Us

Abstract This essay argues that contemporary African American novels turn to the gothic in order to dramatize the uncanny infrastructural and spatial afterlives of the plantation through a literary strategy it identifies as geomemory: a genre friction between mimetic and gothic modes in which postplantation spaces in the US South are imbued with temporal slippages such that past and present meet through the built environment. Tracing the plantation’s environmental and infrastructural presence in the Gulf Coast and throughout the US South, this essay argues that the plantation’s presence is fundamentally gothic. Geomemory, a trope evident across the emerging canon of contemporary African American fiction, allows writers to address the representational challenge of infrastructural and spatial violence via a defamiliarizing chronotope in which past, present, and future come into uneasy contact. Further, geomemory’s particular enmeshment with spatial design and infrastructure means that it moves from identifying the modern afterlife of the plantation to situating the present in the long context of plantation modernity.

scholarly journals Attributing differences in the fate of lateral boundary ozone in AQMEII3 models to physical process representations

2018 ◽  
Vol 18 (23) ◽  
pp. 17157-17175
Author(s):  
Peng Liu ◽  
Christian Hogrefe ◽  
Ulas Im ◽  
Jesper H. Christensen ◽  
Johannes Bieser ◽  
...  
Keyword(s):  
Turbulent Mixing ◽  
Dry Deposition ◽  
Gulf Coast ◽  
Vertical Mixing ◽  
Primary Role ◽  
Southeastern Us ◽  
The Us ◽  
Vertical Grid ◽  
Vertical Turbulent Mixing ◽  
The Impact

Abstract. Increasing emphasis has been placed on characterizing the contributions and the uncertainties of ozone imported from outside the US. In chemical transport models (CTMs), the ozone transported through lateral boundaries (referred to as LB ozone hereafter) undergoes a series of physical and chemical processes in CTMs, which are important sources of the uncertainty in estimating the impact of LB ozone on ozone levels at the surface. By implementing inert tracers for LB ozone, the study seeks to better understand how differing representations of physical processes in regional CTMs may lead to differences in the simulated LB ozone that eventually reaches the surface across the US. For all the simulations in this study (including WRF∕CMAQ, WRF∕CAMx, COSMO-CLM∕CMAQ, and WRF∕DEHM), three chemically inert tracers that generally represent the altitude ranges of the planetary boundary layer (BC1), free troposphere (BC2), and upper troposphere–lower stratosphere (BC3) are tracked to assess the simulated impact of LB specification. Comparing WRF∕CAMx with WRF∕CMAQ, their differences in vertical grid structure explain 10 %–60 % of their seasonally averaged differences in inert tracers at the surface. Vertical turbulent mixing is the primary contributor to the remaining differences in inert tracers across the US in all seasons. Stronger vertical mixing in WRF∕CAMx brings more BC2 downward, leading to higher BCT (BCT=BC1+BC2+BC3) and BC2∕BCT at the surface in WRF∕CAMx. Meanwhile, the differences in inert tracers due to vertical mixing are partially counteracted by their difference in sub-grid cloud mixing over the southeastern US and the Gulf Coast region during summer. The process of dry deposition adds extra gradients to the spatial distribution of the differences in DM8A BCT by 5–10 ppb during winter and summer. COSMO-CLM∕CMAQ and WRF∕CMAQ show similar performance in inert tracers both at the surface and aloft through most seasons, which suggests similarity between the two models at process level. The largest difference is found in summer. Sub-grid cloud mixing plays a primary role in their differences in inert tracers over the southeastern US and the oceans in summer. Our analysis of the vertical profiles of inert tracers also suggests that the model differences in dry deposition over certain regions are offset by the model differences in vertical turbulent mixing, leading to small differences in inert tracers at the surface in these regions.

Hurricane Katrina: an environmental perspective

2006 ◽  
Vol 364 (1845) ◽  
pp. 2099-2115 ◽  
Author(s):  
Ewen McCallum ◽  
Julian Heming
Keyword(s):  
Hurricane Katrina ◽  
Observational Studies ◽  
Gulf Coast ◽  
Theoretical Modelling ◽  
Loss Of Life ◽  
The Us ◽  
Hurricane Season ◽  
The Usa ◽  
The Impact ◽  
National Hurricane Center

On 29 August 2005, Hurricane Katrina hit the Gulf Coast of the USA to become one of the worst natural disasters in the country's history. The forecasts and official warnings of the event issued by the US National Hurricane Center up to 60 h ahead were excellent and largely based on an ‘ensemble’ of model and statistical guidance. The Met Office Global Model is highlighted as one of the best performers for Hurricane Katrina. The active 2005 Atlantic hurricane season has fuelled the debate on the impact of climate change on tropical cyclones. Some recent publications have suggested that this impact is already apparent, while others are more cautious. Inconsistencies remain among many of the theoretical, modelling and observational studies. Despite the excellent warnings, there was a tragic loss of life as a result of Hurricane Katrina which has led to political questions concerning complex socio-economic issues, the state of flood defences and how to coordinate the reaction to and mitigate the impact of such monumental natural hazards.

The relative attractiveness of US LNG exports—is the threat to Australian projects real?

2015 ◽  
Vol 55 (2) ◽  
pp. 420
Author(s):  
Vivek Chandra
Keyword(s):  
Gulf Coast ◽  
Capital Expenditure ◽  
Low Cost ◽  
Market Price ◽  
Oil Prices ◽  
Unit Costs ◽  
Sales Contracts ◽  
The Us ◽  
Relative Attractiveness ◽  
High Feed

The competitiveness of Australian LNG projects against US projects has been a subject of much debate; however, as oil prices have fallen since mid-2014, the debate has shifted from the relative commercial terms of the LNG sales contracts to the relative cost of supply. Falling oil prices have decreased the price of LNG in the traditionally oil-linked price markets of Asia. A lower cost of LNG will increase the demand for gas, especially in the power generation sector. New gas supplies would be required to meet increased demand, but the new supply must be at a competitive cost. The market price will be set by the marginal cost of incremental supply. Legacy projects in Southeast Asia, the Middle East and Australia are unable to increase their volumes. The only other source of incremental supply that can profitably sell at these lower prices are new projects in the US Gulf Coast. Australian greenfield projects will not be able to sell at these prices as they suffer from high capital expenditure (capex), high feed gas prices and high operating costs. In contrast, US Gulf Coast LNG projects are being constructed at significantly lower unit costs, have access to massive low-cost shale gas volumes and will operate at low costs using standard technology. These projects are ideally placed to operate in the lower priced environment, irrespective of the LNG sales contracts’ commercial terms.

scholarly journals Neighborhood Deprivation, Obesity, and Diabetes in Residents of the US Gulf Coast

2020 ◽  
Author(s):  
Michael D Hu ◽  
Kaitlyn G Lawrence ◽  
Mark R Bodkin ◽  
Richard K Kwok ◽  
Lawrence S Engel ◽  
...  
Keyword(s):  
Hemoglobin A1c ◽  
Disease Risk ◽  
Gulf Coast ◽  
Cardiovascular Disease Risk ◽  
Prevalence Ratio ◽  
Prescription Medication ◽  
Area Deprivation ◽  
Neighborhood Deprivation ◽  
Obesity And Diabetes ◽  
The Us

Abstract Socioeconomic status has been associated with cardiovascular disease risk factors. However, few studies have examined this relationship among populations in the US Gulf Coast region. We assessed neighborhood deprivation in relation to obesity and diabetes in 9,626 residents participating in the Gulf Long-Term Follow-Up Study (2011–present) who completed a home visit (2011–2013) with height, weight, waist, and hip measurements. Obesity was categorized as body mass index of at least 30, and diabetes was defined by doctor’s diagnosis or prescription medication. Participant home addresses were linked to an established Area Deprivation Index and categorized into 4 levels (1 = least deprived). In adjusted, modified Poisson regression models, participants with greatest deprivation were more likely to have obesity compared with those with least deprivation (adjusted prevalence ratio (aPR) = 1.21, 95% confidence interval (CI): 1.08, 1.35), central obesity (aPR = 1.11, 95% CI: 1.04, 1.19), and diabetes (aPR = 1.49, 95% CI: 1.03, 2.14). Repeated analyses among a subgroup of participants (n = 3,016) whose hemoglobin A1C values were measured 3 years later indicated the association with diabetes (defined as diagnosis, medications, or hemoglobin A1C ≥ 6.5) was similar (aPR = 1.46, 95% CI: 1.14, 1.86). Results suggest neighborhood deprivation is associated with obesity and diabetes in a US region with high baseline prevalence.

Reaching vulnerable populations in the disaster-prone US Gulf Coast: Communicating across the crisis lifecycle

2019 ◽  
Vol 14 (2) ◽  
pp. 121-136
Author(s):  
Elizabeth L. Petrun Sayers, PhD ◽  
Andrew M. Parker, PhD ◽  
Rajeev Ramchand, PhD ◽  
Melissa L. Finucane, PhD ◽  
Vanessa Parks, MA ◽  
...  
Keyword(s):  
Hurricane Katrina ◽  
Vulnerable Populations ◽  
News Media ◽  
Gulf Coast ◽  
Multinomial Logistic Regression ◽  
Geographic Region ◽  
Unique Challenge ◽  
Response Strategies ◽  
The Us ◽  
Channel Preferences

Delivering risk and crisis communication to US Gulf Coast residents poses a unique challenge to individual and organizational responders. The region has endured several natural and man-made disasters, spanning Hurricane Katrina, the Deepwater Horizon oil spill, and more recently Hurricanes Harvey and Irma. In the future, the US Gulf Coast is expected to remain susceptible to a range of disasters. At the same time, the region is experiencing a growing population, struggles with systemic disparities between residents, and is home to major energy, tourism, fishing, and shrimping industries. Engaging in pre-crisis planning with vulnerable populations, and assessing response strategies, can help the region prepare for future disasters. In support of understanding vulnerabilities in the US Gulf Coast, the authors conducted a survey in 2016 of n = 2,520 adult residents of the targeted geographic region. The authors examine how demographic characteristics affect communication channel preferences (ie, television, Internet, print [newspapers, magazines], radio, word-of-mouth, or another specified channel) and trust in sources (ie, the national news media, local news media, business leaders and organizations, religious leaders and institutions, academics and academic institutions, friends and family, and doctors) in the US Gulf Coast. Weighted prevalence estimates or similar summary statistics (mean, standard deviation) are provided for both outcomes. Findings for channel preferences and trust in sources are examined by sex, race/ethnicity, age, and education. Weighted multinomial logistic regression is used in a multivariate model. Weighted linear regression is used to examine differences in trust in each source of information. Results highlight significant differences in channel preferences and trust across respondents. The authors also place these results in context to more readily accessible national estimates of these outcomes, emphasizing takeaways for the region.

Basement Geometry of the US Gulf Coast Basin

AAPG Bulletin ◽  
1993 ◽  
Vol 77 ◽  
Author(s):  
LOPEZ, JOHN A., Amoco Production Co
Keyword(s):  
Gulf Coast ◽  
The Us ◽  
Gulf Coast Basin
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