Southwest Asia Research Articles

Ethics in Extracorporeal Membrane Oxygenation and South West Asia and Africa Extracorporeal Life Support Organization: A Robust Growth with Ethics

Ethics in Extracorporeal Membrane Oxygenation and South West Asia and Africa Extracorporeal Life Support Organization: A Robust Growth with Ethics

The Global Extracorporeal Life Support Organization Chapter: South West Asia and Africa Extracorporeal Life Support Organization in 2024

In early 2024, we can take a moment to acknowledge the journey we have been on in critical care, especially in the region that comprises Extracorporeal Life Support Organizations (ELSO’s) South West Asia and Africa Continent (SWAAC) Chapter. ELSO has been able to develop a global standard in foundational educational knowledge for adults. This is only possible with the participation of experts in every region. The process for developing this standard has now been published. ELSO is using this same process to develop the foundational knowledge for neonatal and pediatric education. We are grateful to many in the SWAACELSO region for your assistance in the development of a global standard in education and training. The SWAACELSO region has achieved so much in the recent past. Participation in all facets of extracorporeal life support (ECLS) and ELSO globally continues to advance how we work together and what is available for patients in communities everywhere. This region will continue to help lead in creating resiliency and innovation in the coming years. Personally, I am grateful for the dedication and commitment to improving life support that this region continues to advance.

Ancient mitogenomes from Pre-Pottery Neolithic Central Anatolia and the effects of a Late Neolithic bottleneck in sheep (Ovis aries).

Occupied between ~10,300 and 9300 years ago, the Pre-Pottery Neolithic site of Aşıklı Höyük in Central Anatolia went through early phases of sheep domestication. Analysis of 629 mitochondrial genomes from this and numerous sites in Anatolia, southwest Asia, Europe, and Africa produced a phylogenetic tree with excessive coalescences (nodes) around the Neolithic, a potential signature of a domestication bottleneck. This is consistent with archeological evidence of sheep management at Aşıklı Höyük which transitioned from residential stabling to open pasturing over a millennium of site occupation. However, unexpectedly, we detected high genetic diversity throughout Aşıklı Höyük's occupation rather than a bottleneck. Instead, we detected a tenfold demographic bottleneck later in the Neolithic, which caused the fixation of mitochondrial haplogroup B in southwestern Anatolia. The mitochondrial genetic makeup that emerged was carried from the core region of early Neolithic sheep management into Europe and dominates the matrilineal diversity of both its ancient and the billion-strong modern sheep populations.

Particle analysis of surgical lung biopsies from deployed and non-deployed US service members during the Global War on Terrorism.

The role that inhaled particulate matter plays in the development of post-deployment lung disease among US service members deployed to Southwest Asia during the Global War on Terrorism has been difficult to define. There is a persistent gap in data addressing the relationship between relatively short-term (months to a few years) exposures to high levels of particulate matter during deployment and the subsequent development of adverse pulmonary outcomes. Surgical lung biopsies from deployed service members and veterans (DSMs) and non-deployed service members and veterans (NDSMs) who develop lung diseases can be analyzed to potentially identify residual deployment-specific particles and develop associations with pulmonary pathological diagnoses. We examined 52 surgical lung biopsies from 25 DSMs and 27 NDSMs using field emission scanning electron microscopy (FE-SEM) with energy dispersive x-ray spectroscopy (EDS) to identify any between-group differences in the number and composition of retained inorganic particles, then compared the particle analysis results with the original histopathologic diagnoses. We recorded a higher number of total particles in biopsies from DSMs than from NDSMs, and this difference was mainly accounted for by geologic clays (illite, kaolinite), feldspars, quartz/silica, and titanium-rich silicate mixtures. Biopsies from DSMs deployed to other Southwest Asia regions (SWA-Other) had higher particle counts than those from DSMs primarily deployed to Iraq or Afghanistan, due mainly to illite. Distinct deployment-specific particles were not identified. Particles did not qualitatively associate with country of deployment. The individual diagnoses of the DSMs and NDSMs were not associated with elevated levels of total particles, metals, cerium oxide, or titanium dioxide particles. These results support the examination of particle-related lung disease in DSMs in the context of comparison groups, such as NDSMs, to assist in determining the strength of associations between specific pulmonary pathology diagnoses and deployment-specific inorganic particulate matter exposure.

The development of crop production in the northern Horn of Africa: a review of the archaeobotanical evidence

ABSTRACT This article presents a synthesis of the hypotheses and evidence for plant domestication and the origins of agriculture in the northern Horn of Africa. To date, available archaeological data point to an introduction of agricultural practices to Ethiopia during the late Holocene, c. 1600 BC, influenced by adjacent areas including eastern Sudan, Egypt and southern Arabia. The archaeobotanical record shows that farming in the northern highlands was based on the cultivation of barley, linseed and lentils, combined with the exploitation of local wild grasses from the Panicoideae and Chloridoideae sub-families. This indicates that local populations also played a role in the development of productive activities in the region, a process that might have been in place before the arrival of the southwest Asian agricultural package. After the first millennium BC, amidst an increase in sedentary settlements in the region, new domesticated crops appeared in the archaeological record. These include exogenous crops such as emmer wheat, but also indigenous plants such as t’ef and noog, which were locally domesticated likely throughout the Pre-Aksumite period. With the rise of the Aksumite Kingdom, c. 50 BC – AD 700, the agricultural package again expanded to include of a wide range of pulses, geophytes and other economic crops. Macrobotanical remains of sorghum and finger millet also appear for the first time during this period, although this contrasts with the microbotanical record of the region, which points to an earlier presence. In the southern highlands and southwest Ethiopia, evidence of Plectranthus edulis (Vatke) Agnew (Ethiopian potato or Oromo potato) has been identified by the late first millennium BC, pointing towards an earlier domestication than previously considered. Similarly, enset and coffee remains have been documented during the early first millennium AD. Altogether, new studies are needed to confirm some of these hypotheses, as archaeobotanical studies in the northern Horn are still limited. The combination of macrobotanical and microbotanical data, along with ethnoarchaeological and experimental research programs and linguistic studies, will be of critical importance for refining our current understanding of the processes associated with plant domestication and the introduction of crop production in the region.

Traversing Disciplinary Boundaries, Globalizing Indigeneities

Abstract The author’s work spans the disciplinary boundaries of political science, Middle East studies, Indigenous studies, and their subfields. Broadly situated within critical theoretical bodies of knowledge, she focuses on an Indigenous nation in what is today known as Iraq. Her work is grounded within particular and fragmented locations that blur various lines and multiple layers of coloniality. This article offers a critical reflection of the invisibility in working on Indigeneity in southwest Asia within the structural imperatives of the academy. It takes up each of these themes by examining the fields of international relations and Iraqi studies to show how the story of Assyrians is invisible or unintelligible across these fields of political science and Middle East studies. Moreover, what the Assyrian story tells us about these disciplines and the multiplicity of coloniality (Patel 2019) is also rendered invisible. Despite the absence of Assyrians from Indigenous studies, the author sees this field as a site from which to potentially globalize Indigeneities. Specifically, she uses Indigenous feminism to construct a more nuanced framework into Assyrian histories, a framework that uses the lens of colonialism, land theft, erasure, and genocide to reframe the Assyrian experience as a remnant of the colonial global order.

Racial And Ethnic Inequities In Postpartum Depressive Symptoms, Diagnosis, And Care In 7 US Jurisdictions.

Understanding whether racial and ethnic inequities exist along the postpartum mental health care continuum is vital because inequitable identification of depression can lead to inequitable referral to and receipt of care. We aimed to expand on existing cross-sectional and single-state data documenting potential racial and ethnic disparities in postpartum depression care. Using early (from two to six months) and late (from twelve to fourteen months) postpartum survey data from seven US jurisdictions, we documented patterns of early postpartum depressive symptoms, perinatal mood and anxiety disorder (PMAD) diagnosis, and receipt of postpartum mental health care overall and by racial and ethnic identity. Of 4,542 people who delivered live births in 2020, 11.8percent reported early postpartum depressive symptoms. Among the sample with these symptoms, only 25.4percent reported receiving a PMAD diagnosis, and 52.8percent reported receiving some form of postpartum mental health care. There were no significant differences in diagnosis by race and ethnicity. Respondents identifying as Asian; Native Hawaiian or Pacific Islander; Southwest Asian, Middle Eastern, or North African; Hispanic; and non-Hispanic Black were significantly less likely than non-Hispanic White respondents to receive mental health care, demonstrating stark inequities in the management of postpartum depressive symptoms. Policies mandating and reimbursing universal postpartum depression screening, facilitating connection to care, reducing insurance coverage gaps, and enhancing clinician training in culturally responsive care may promote equitable postpartum mental health care.

Provisioning urbanism: a comparative urban-rural zooarchaeology of ancient Southwest Asia

Historically, urban centres are seen as consumers that draw in labour and resources from their rural hinterlands. Zooarchaeological studies of key urban sites in Southwest Asia demonstrate the movement of livestock, but the region-wide application of these findings has not been tested and the logistics of urban provisioning remain poorly understood. Here, the authors analyse zooarchaeological data from 245 sites in the Levant and Mesopotamia to examine patterns of livestock production and consumption over a 5000-year period. They find that although preferences varied over time and space, urban sites consistently relied on rural satellites to overcome local limitations to support their large and diverse populations.

Two Decades of Department of Veterans Affairs Traumatic Brain Injury Care and Benefits for Veterans of Post-9/11 Conflicts.

To describe the background, methodology, and results of the congressionally mandated Department of Veterans Affairs (VA) Traumatic Brain Injury (TBI) Veterans Health Registry. Veterans Health Administration (VHA) and Veterans Benefit Administration (VBA). A total of 441 639 Veterans of post-9/11 conflicts who exhibited symptoms associated with TBI and sought care or benefits from the VA between September 2001 and September 2021. Design: Retrospective analysis of VHA and VBA administrative records. (1) VA/Department of Defense Identity Repository to identify Veterans with a deployment to the Southwest Asia theater of operations; (2) the VA TBI Screening and Evaluation Program data; (3) Inpatient and Outpatient Encounter data; and (4) an extract of the VBA Corporate Database to identify Veterans filing benefit claims based on TBI. An unduplicated total of 441 639 post-9/11 Veterans were identified in the Registry via three different pathways to entry: 369 909 Veterans through a positive TBI Screen, 253 177 Veterans receiving healthcare including a TBI diagnosis, and 108 541 Veterans filing TBI disability claims. Among Veterans reporting current TBI symptoms who completed a clinical evaluation, a diagnosis of TBI was confirmed by a TBI specialist in 68.7% of the cases. The TBI severity of confirmed cases was classified as mild in 86.6% of the cases, moderate in 8.3%, and severe in 4.1%. The TBI Registry Veterans were hospitalized 66 503 times and seen 1 521 898 times as outpatients in VHA facilities with diagnoses including TBI. Among Veterans filing TBI disability claims, 67.3% were adjudicated as service-connected. The VA TBI Health Registry has identified over 440 000 Veterans of post-9/11 conflicts who presented to the VA for care or benefits with TBI symptomatology. This large number and the volume of TBI health care and benefits provided over the two decades since 9/11 demonstrate the need for the VA's strong ongoing focus on screening, evaluation, and rehabilitation of TBI.

Celtis australis Exhibits Cytotoxic Effects by Inducing DNA Damage in Human Ovarian Cancer Cells

Native to the Mediterranean and southwest Asia, Celtis australis is used in folk medicine to treatment of many diseases such as peptic ulcer, diarrhea, dysentery, pain, and colic. However, there are very few studies on the effects of this species on cancer. We report for the first time the cytotoxic and genotoxic properties of C. australis on the human ovarian cancer cell line A2780.
 In the study, C. australis extract prepared in ethanol/phosphate buffer was applied to A2780 cells. The change in viability level in A2780 cells after treatment was determined by MTT assay and DNA damage was determined by single-cell gel electrophoresis (Comet) analysis.
 Our results showed that plant extract application at doses above 200 µg/ml significantly decreased A2780 cell viability (p

Future projections of compound temperature and precipitation extremes and corresponding population exposure over global land

Extreme climate events are hotspots in global change. However, research on the changes in future compound events and population exposure is still limited. Leveraging from the data of the sixth phase of the Coupled Model Intercomparison Project (CMIP6), this paper aims to analyze the temporal and spatial changes of global compound temperature and precipitation extreme events in the future. We also predict the risk of population exposure and quantify the contribution of different factors to exposure. The results show that: (1) In the next 80 years, compound hot-dry event (CHDE) will increase at a rate of 0.02, 0.03, and 0.08 days per decade under the three scenarios of SSP1–2.6, SSP2–4.5 and SSP5–8.5, respectively. By comparison, compound hot-humidity event (CHHE) shows a downward trend under the three scenarios, with a downward rate of 0.01, 0.02, and 0.11 days per decade, respectively. (2) Under the SSP1–2.6 and SSP2–4.5 scenarios, CHDE and CHHE have two or more mutation points. Under the SSP5–8.5 scenario, CHDE shows a significant upward and CHHE shows a significant downward trend in the middle and late 21st century. These two indices exhibit periodic changes in all three scenarios (3) South Asia, West Asia, and Northeast Africa have higher CHDE values, while regions with higher CHHE values are located in North Asia and Greenland. (4) Climate change is a major factor affecting population exposure. For CHDE, climate, population, and their synergistic effects contribute about 75%, 20%, and 5% to the exposure, respectively. For CHHE, the contributions of these three factors are 85%, 10%, and 5% respectively. These findings provide scientific guidance for the rational formulation of population policies, the effective avoidance of climate disaster risks and the protection of human health.

Winter precipitation predictability in Central Southwest Asia and its representation in seasonal forecast systems

In Central Southwest Asia (CSWA; 22°N to 40°N and 30°E to 70°E), winter (November to February) precipitation contributes up to 70% of the annual mean, but substantial interannual variations exist. Dynamical models exhibit subpar predictability in this region, but the limits of their skills are not well established. Here, we identify the tropical and extratropical forcings that explain ~75% of area-averaged seasonal variability in CSWA winter precipitation. Tropical forcing comes from the indirect El Niño-Southern Oscillation (ENSO) pathway, the leading mode of tropical Indian Ocean precipitation variability. This mode is coupled with ENSO-related Pacific Ocean sea surface temperature variability. A direct ENSO influence on CSWA does not extend beyond its Indian Ocean connection. Extratropical forcing comes from a large-scale mode of internal atmospheric variability. The spatial structure, variability of tropical forcing, and teleconnection with CSWA winter precipitation are skillfully depicted in two seasonal forecasting systems: the fifth-generation seasonal forecasting system (SEAS5) and Seamless System for Prediction and Earth System Research (SPEAR). Extratropical forcing’s spatial structure is also produced skillfully in the two modelling systems; however, the representation of its interannual variability and teleconnection requires improvement. While SEAS5 displays skill in representing extratropical forcing influence on CSWA winter precipitation and marginal skill in reproducing interannual variability, SPEAR has negligible ability in both areas. Consequently, these models have limited predictive skills over CSWA in winter. While improvements in representing extratropical forcing may be inherently limited as it arises from internal atmospheric variability, further research is needed to establish its predictability limits fully.

Potential of solar-induced chlorophyll fluorescence (SIF) to access long-term dynamics of soil salinity using OCO-2 satellite data and machine learning method

The accumulation of soil salt becomes a worldwide widespread phenomenon, being a major threat to global production. As an environmental stress, soil salinity can reduce the vegetation photosynthetic activity. Solar-induced chlorophyll fluorescence (SIF) is an electromagnetic signal actively released by vegetation during photosynthesis. SIF not only can capture lower vegetation photosynthetic activity due to environmental stress promptly, but also is less affected by atmosphere and soil background. However, the ability of SIF observation to detect soil salinity remains unclear. Here, we use standardizedsolar-induced chlorophyll iluorescence index (SIFI) from SIF observation time series (2000 ∼ 2020) of global OCO-2 based SIF product (GOSIF) to develop soil salinity model. The results show that: SIF observation can identify salt affected soil (EC ≥ 2 ∼ 4 dS m−1) and salinity class a global scale. The SIFI calculated from SIF observation at May ∼ August (hereafter SIFI5-8) is the optimal sensitivity indices for rainfed cropland, herbaceous cover, irrigated cropland, shrubland, grassland. SIFI10-11 is the optimal sensitivity indices for forest and sparse vegetation; (2) By comparison, the ovrerall classification accuracy of predicted salinity class is above 70 %. The order of classification accuracy is rainfed cropland > irrigated cropland > bare area > forest > grassland > shrubland > herbaceous cover > sparse vegetation; (3) During at least three-quarters of the period from 2000 to 2020, the area of salt affected soil (EC ≥ 2 ∼ 4 dS m−1) was 4.9 Mkm2; (4) The annual change rate of global soil salt content is generally between −0.05 and 0.05 dS m−1 yr−1. Soil salinity in South Africa and West Asia increased greatly with an annual change rate of 0.02 ∼ 0.03 dS m−1 yr−1. These results demonstrate the ability of SIF observation to estimate soil salinity, providing a new perspective for explaining and evaluating soil salinity variation.

Pre-Aksumite and Aksumite Agricultural Economy at Ona Adi, Tigrai (Ethiopia): First look at a 1000-Year History

Archaeobotanical investigations at the site of Ona Adi in Tigrai were conducted during the 2013–2015 field seasons within the framework of the Eastern Tigrai Archaeological Project (ETAP). The site occupation spanned the Middle/Late Pre-Aksumite period (ca. 750/600 BCE) to the fall of the Aksumite Kingdom (ca. 700 CE), including the Pre-Aksumite to Aksumite transition (ca. 400 BCE–CE 1). The main objective of the study was to examine the agricultural economy in Eastern Tigrai during these periods and to evaluate the impact of social and cultural developments on the agricultural practices at Ona Adi. Recovered macrobotanical remains included wheat, barley, linseed, noog, lentil, and wild/weedy plants. In addition, evidence of finger millet was recovered along with tentative identifications of t’ef. The phytolith record shows evidence of grass processing, including morphotypes associated with Chloridoideae, Panicoideae, and Pooideae grasses. Results indicate that plants of both African and Southwest Asian origins were present in the region from the mid-eighth century BCE to the eighth century CE, but their relative importance varied throughout time in relation to socio-political changes at the regional level. Our data demonstrate a significant degree of continuity in the local agricultural economy, which remained largely unchanged even after the decline of Aksumite state.

Integrative phylogenetic, phylogeographic and morphological characterisation of the Unio crassus species complex reveals cryptic diversity with important conservation implications

The global decline of freshwater mussels and their crucial ecological services highlight the need to understand their phylogeny, phylogeography and patterns of genetic diversity to guide conservation efforts. Such knowledge is urgently needed for Unio crassus, a highly imperilled species originally widespread throughout Europe and southwest Asia. Recent studies have resurrected several species from synonymy based on mitochondrial data, revealing U. crassus to be a complex of cryptic species. To address long-standing taxonomic uncertainties hindering effective conservation, we integrate morphometric, phylogenetic, and phylogeographic analyses to examine species diversity within the U. crassus complex across its entire range. Phylogenetic analyses were performed using cytochrome c oxidase subunit I (815 specimens from 182 populations) and, for selected specimens, whole mitogenome sequences and Anchored Hybrid Enrichment (AHE) data on ∼ 600 nuclear loci. Mito-nuclear discordance was detected, consistent with mitochondrial DNA gene flow between some species during the Pliocene and Pleistocene. Fossil-calibrated phylogenies based on AHE data support a Mediterranean origin for the U. crassus complex in the Early Miocene. The results of our integrative approach support 12 species in the group: the previously recognised Unio bruguierianus, Unio carneus, Unio crassus, Unio damascensis, Unio ionicus, Unio sesirmensis, and Unio tumidiformis, and the reinstatement of five nominal taxa: Unio desectusstat. rev., Unio gontieriistat. rev., Unio mardinensisstat. rev., Unio nanusstat. rev., and Unio vicariusstat. rev. Morphometric analyses of shell contours reveal important morphospace overlaps among these species, highlighting cryptic, but geographically structured, diversity. The distribution, taxonomy, phylogeography, and conservation of each species are succinctly described.

Phylogenetics and phylogeography of Euphorbia canariensis reveal an extreme Canarian-Asian disjunction but limited inter-island colonization.

Euphorbia canariensis is an iconic endemic species representative of the lowland xerophytic communities of the Canary Islands. It is widely distributed in the archipelago despite having diasporas unspecialized for long-distance dispersal. Here, we reconstructed the evolutionary history of E. canariensis at two levels: a time-calibrated phylogenetic analysis aimed at clarifying interspecific relationships and large-scale biogeographic patterns; and a phylogeographic study focused on the history of colonization across the Canary Islands. For the phylogenetic study, we sequenced the ITS region for E. canariensis and related species of Euphorbia sect. Euphorbia. For the phylogeographic study, we sequenced two cpDNA regions for 28 populations representing the distribution range of E. canariensis. The number of inter-island colonization events was explored using PAICE, a recently developed method that includes a sample size correction. Additionally, we used species distribution modelling (SDM) to evaluate environmental suitability for E. canariensis through time. Phylogenetic results supported a close relationship between E. canariensis and certain Southeast Asian species (E. epiphylloides, E. lacei, E. sessiliflora). In the Canaries, E. canariensis displayed a west-to-east colonization pattern, not conforming to the "progression rule", i.e. the concordance between phylogeographic patterns and island emergence times. We estimated between 20 and 50 inter-island colonization events, all of them in the Quaternary, and SDM suggested a late Quaternary increase in environmental suitability for E. canariensis. The extreme biogeographic disjunction between Macaronesia and Southeast Asia (ca. 11,000 km) parallels that found in a few other genera (Pinus, Dracaena). We hypothesize that these disjunctions are better explained by extinction across north Africa and southwest Asia rather than long-distance dispersal. The relatively low number of inter-island colonization events across the Canaries is congruent with the low dispersal capabilities of E. canariensis.

Kaçak | qaçax | قاچاق : fugitive forms of bureaucracy and economy across Southwest Asia

ABSTRACT Electricity and petroleum stolen from grids of distribution. Livestock, tea, and tobacco traded as contraband goods across national borders. An apartment building built without permits. A defendant who refuses to show up to his trial. What unites these seemingly disparate situations in Turkey, Kurdistan and Iran is that they are all described with the qualifier kaçak. Although conventionally translated into English as the equivalent of ‘smuggled good,' the semantic domain of kaçak in Turkish (loaned into Kurdish and Persian) is more capacious than ‘smuggled’ signifies: Derived from the Turkish verb kaçmak - to run away, flee, or be a fugitive - kaçak helps us recover the act of breaching the obligations of a social or legal contract as a constitutive field of politics, framed by the socio-cultural constructions of modern bureaucracy and economy. Each participant tracks kaçak as a good, as a tapped resource or a legally sanctioned person, and shows the many forms kaçak takes in the hands of concrete social actors under historically specific material conditions. Further, kaçak provides a historically and geographically more expansive windows into the politically instituted process that is the making of states and economies in cross-regional and cross-disciplinary ways.

Remaining Palestinian

Palestinian filmmakers are largely dependent on foreign funding for production and on foreign festivals for publicity. Making a Palestinian film can seem as “impossible” as remaining Palestinian amid fragmenting effects of occupation/war and peace accords. Against such pressures, Palestinian filmmaker Annemarie Jacir tells stories with protagonists, who, for foreign funders, can seem like “unruly subjects” for remaining Palestinian. As a consequence, her films themselves can seem like “unruly subjects” to industry film critics. Her films like twenty impossibles (ka’inana ashrun mustaheel, 2003), Salt of This Sea (Milh Hadha al-Bahr, 2008), When I Saw You (Lamma Shoftak, 2012), and Wajib (2017) tell stories about Palestinians debating each other (rather than Israelis via US negotiators) during key moments in Palestinian history, including the Nakba (1948), the Naksa (1967), the Oslo Accords (1993), and Al-Aqsa or second Intifada (2000–05). Jacir’s protagonists refuse the limiting choices on offer. They demand to be recognized as Palestinian, as does Jacir as a Palestinian filmmaker against the efforts of Western industry critics, festivals, and funders to label her as an “Arab woman filmmaker,” often carrying colonial assumptions of “oppressed” or “exceptional” women throughout Southwest Asia (“the Middle East”). Her films do more than offer a glimpse of everyday life to “humanize” Palestinians; they are “unruly subjects” that unsettle assumptions to reframe the debates.

Screening sovereignty: Cold War mediations of nationhood in USIA motion picture operations in the SWANA region

This article explores how visible constructions and perceptions of sovereignty in the motion pictures of the United States Information Agency (USIA) factored into the dynamics of US Cold War foreign policy amidst the rise of the Non-Aligned Movement. Specifically, it focuses on agency films about and circulating within the Southwest Asian and North African (SWANA) region – such as the locally produced Iraq al-Youm newsreels (c.1956–58). By mapping the different policy contexts of the Eisenhower and Kennedy administrations onto the USIA films’ aesthetics and themes, the article illustrates continuities in the United States’s attempts to expressively leverage images and evocations of sovereignty to sell and consolidate its policy interests in the region.

Adjoint Waveform Tomography for Crustal and Upper Mantle Structure of the Middle East and Southwest Asia for Improved Waveform Simulations Using Openly Available Broadband Data

ABSTRACT We present a new model of radially anisotropic seismic wavespeeds for the crust and upper mantle of a broad region of the Middle East and Southwest Asia (MESWA) derived from adjoint waveform tomography. The new model enables fully 3D simulations of complete three-component waveforms and provides improved fits that were not possible with previous models. We inverted over 32,000 waveforms from 192 earthquakes recorded by over 1000 openly available broadband seismic stations from permanent and temporary networks in the region with highly uneven coverage. Inversion iterations proceeded from the period band 50–100 s in six stages and 54 total iterations reducing the minimum period to 30 s. Our final model, MESWA, improves waveform fits compared to the starting and other models for both the data used in the inversion and an independent validation set of 66 events. Restitution tests indicate that the model resolves features in the central part of the model to depths of about 150 km. The new model reveals tectonic features imaged by other studies and methods but in a new holistic model of anisotropic shear and compressional wavespeeds (VS and VP, respectively) covering a larger domain with smaller scale length and amplified features. Examples include low crustal VS in the Tethyan belt and low mantle VS following divergent (Gulf of Aden, Red Sea) and transform (Dead Sea fault) margins of the Arabian plate. Low VS is imaged below Cenozoic volcanic centers of the Mecca–Madina–Nafud Line, Arabian Peninsula, and the Türkiye–Iran border region. Elevated VS tracks Makran subduction under southeast Iran with near vertical dip. MESWA could be used as a starting model for further improvements, say, using waveforms from in-country seismic networks that are not currently openly available and/or smaller-scale studies targeting a shorter period. The model could be used to improve earthquake hazard studies and nuclear explosion monitoring.