A High Resolution Unstructured Model to Study Storm Surge in the Pacific Island of Guam

Author(s):  
Himangshu S. Das ◽  
Hoon-Shin Jung ◽  
Jane Smith ◽  
Ty Wamsley
2021 ◽  
pp. 175063522199094
Author(s):  
Matthew Pressman ◽  
James J Kimble

Drawing upon media framing theory and the concept of cognitive scripts, this article provides a new interpretation of the context in which the famous World War II photograph ‘Raising the Flag on Iwo Jima’ appeared. This interpretation is based primarily on an examination of American newspaper and newsreel coverage from the Pacific island battles prior to Iwo Jima. The coverage – especially the pictorial coverage – often followed a three-step sequence that showed US forces proceeding from a landing to a series of skirmishes, then culminating with a flag-raising image. This created a predictable cognitive script. That script, combined with other framing devices found in the news coverage (such as metaphors and catchphrases), conveyed the misleading message that the Allies’ final victory over Japan was imminent in early 1945. The Iwo Jima photo drove home that message more emphatically than anything else. This circumstance had profound implications for government policy at the time and, in retrospect, it illustrates the potency of media framing – particularly in times of crisis or war.


2020 ◽  
Vol 60 (4) ◽  
pp. 632-643
Author(s):  
Derek Taira

There is a “world of difference,” anthropologist Epeli Hauʻofa argued, “between viewing the Pacific as ‘islands in a far sea’ and as ‘a sea of islands.’” The distinction between both perspectives, he explained, is exemplified in the two names used for the region: Pacific Islands and Oceania. The former represents a colonial vision produced by white “continental men” emphasizing the smallness and remoteness of “dry surfaces in a vast ocean far from centers of power.” This understanding has produced and sustained an “economistic and geographic deterministic view” emphasizing Pacific Island nations as “too small, too poor, and too isolated” to take care of themselves. The latter, in contrast, denotes a grand space inhabited by brave and resourceful people whose myths, legends, oral traditions, and cosmologies reveal how they did not conceive of themselves in such “microscopic proportions.” Rather, Oceanic peoples have for over two millennia viewed the sea as a “large world” where peoples, goods, and cultures moved and mingled unhindered by fixed national boundaries.


The Condor ◽  
2008 ◽  
Vol 110 (3) ◽  
pp. 421-427 ◽  
Author(s):  
ARJUN AMAR ◽  
FRED AMIDON ◽  
BEATRIZ ARROYO ◽  
JACOB A. ESSELSTYN ◽  
ANN P. MARSHALL

2021 ◽  
Author(s):  
Giorgia Camperio ◽  
Caroline Welte ◽  
S. Nemiah Ladd ◽  
Matthew Prebble ◽  
Nathalie Dubois

<p>Espiritu Santo is one of the 82 islands of the archipelago of Vanuatu and is the largest, highest, and most biodiverse of the insular country. Climatic changes linked to El Niño and extreme events such as cyclones and volcanic eruptions are a daily challenge in this remote area. These events can be recorded in sedimentary archives. Here we present a multi-proxy investigation of sediment cores retrieved from two small lakes located on the West coast of Espiritu Santo. Although the records span the last millennium, high-resolution radiocarbon dating of macrofossils reveals a rapid accumulation of sediment in the past 100 years. The high accumulation rate coupled with the high-resolution dating of freshwater sediments allows us to compare the <sup>14</sup>C bomb curve with the biogeochemical proxies of the sedimentary records. The results can then be validated against written and oral historical records linked with the societal perception of recent environmental changes in this vulnerable ecosystem.</p><div> <div title="Translate selected text"></div> <div title="Play"></div> <div title="Copy text to Clipboard"></div> </div>


2019 ◽  
Vol 99 (2) ◽  
pp. 1105-1130 ◽  
Author(s):  
Kun Yang ◽  
Vladimir Paramygin ◽  
Y. Peter Sheng

Abstract The joint probability method (JPM) is the traditional way to determine the base flood elevation due to storm surge, and it usually requires simulation of storm surge response from tens of thousands of synthetic storms. The simulated storm surge is combined with probabilistic storm rates to create flood maps with various return periods. However, the map production requires enormous computational cost if state-of-the-art hydrodynamic models with high-resolution numerical grids are used; hence, optimal sampling (JPM-OS) with a small number of (~ 100–200) optimal (representative) storms is preferred. This paper presents a significantly improved JPM-OS, where a small number of optimal storms are objectively selected, and simulated storm surge responses of tens of thousands of storms are accurately interpolated from those for the optimal storms using a highly efficient kriging surrogate model. This study focuses on Southwest Florida and considers ~ 150 optimal storms that are selected based on simulations using either the low fidelity (with low resolution and simple physics) SLOSH model or the high fidelity (with high resolution and comprehensive physics) CH3D model. Surge responses to the optimal storms are simulated using both SLOSH and CH3D, and the flood elevations are calculated using JPM-OS with highly efficient kriging interpolations. For verification, the probabilistic inundation maps are compared to those obtained by the traditional JPM and variations of JPM-OS that employ different interpolation schemes, and computed probabilistic water levels are compared to those calculated by historical storm methods. The inundation maps obtained with the JPM-OS differ less than 10% from those obtained with JPM for 20,625 storms, with only 4% of the computational time.


2021 ◽  
Author(s):  
◽  
Elspeth Davidson

<p>This study looks at the relevance of regional organisations in the Pacific Island region. It analyses the history of the key regional organisations: the Secretariat of the Pacific Community (SPC) and the Pacific Islands Forum Secretariat (PIFS). Since their establishment, there has been extensive criticism of the work of these organisations. This study tests and analyses the issue of legitimacy within supra-national organisations, and questions whether regionalism in the Pacific is an anachronism of the past.  In the Pacific, regionalism puts out a compelling argument for its existence. Throughout the region, small island developing states are spread across the world’s largest ocean. Pacific Island states face many challenges, including: small economies, geographical disadvantages, vulnerability to climate change, varying availability to resources and a diverse range of cultures and languages. Regionalism provides a chance for these island states to influence world policy, build capacity in the region, promote good governance, maintain peaceful neighbourly relations, and create positive development outcomes.  The methodology uses qualitative research of document analysis and semi-structured interviews with key informants. The research claims a social constructivist epistemology and uses an inductive conceptual framework in order to find solutions to the complex challenges of Pacific regionalism.  It was found that regional organisations need to increase their transparency in order to enhance their legitimacy. They need provide a clearer evidence base, where all Pacific people can recognise and understand the benefit of regional organisations. The organisations need to work strategically to be nimble and reactive to upcoming critical junctures and issues. Council of Regional Organisations in the Pacific (CROP) agencies need to coordinate better amongst themselves, open up communication with all stakeholders and create clearer mandates. In order to promote positive development, all stakeholders and Pacific people need to take ownership of these organisations, and support the Framework for Pacific Regionalism process. This study argues that there is great potential for regionalism in the Pacific, but this will only be possible if the region works collectively to enhance the legitimacy of these organisations.</p>


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