Strong Surface Fronts over Sloping Terrain and Coastal Plains

2008 ◽  
pp. 35-85 ◽  
Author(s):  
Lance F. Bosart ◽  
Alicia C. Wasula ◽  
Walter H. Drag ◽  
Keith W. Meier
Keyword(s):  
Coastal Plains ◽  
Strong Surface ◽  
Sloping Terrain

THE NEW RADIOCARBON DATASET FOR TRILITH MONUMENTS OF SOUTHEASTERN ARABIA

Radiocarbon ◽  
2020 ◽  
pp. 1-11
Author(s):  
R Garba ◽  
P Demján ◽  
I Svetlik ◽  
D Dreslerová
Keyword(s):  
Iron Age ◽  
Temporal Patterns ◽  
Temporal Analysis ◽  
Coastal Plains ◽  
Spatial And Temporal Patterns ◽  
Two Phase ◽  
Stone Monuments ◽  
South Central ◽  
Geographical Expansion ◽  
Spatio Temporal

ABSTRACT Triliths are megalithic monuments scattered across the coastal plains of southern and southeastern Arabia. They consist of aligned standing stones with a parallel row of large hearths and form a space, the meaning of which is undoubtedly significant but nonetheless still unknown. This paper presents a new radiocarbon (14C) dataset acquired during the two field seasons 2018–2019 of the TSMO (Trilith Stone Monuments of Oman) project which investigated the spatial and temporal patterns of the triliths. The excavation and sampling of trilith hearths across Oman yielded a dataset of 30 new 14C dates, extending the use of trilith monuments to as early as the Iron Age III period (600–300 BC). The earlier dates are linked to two-phase trilith sites in south-central Oman. The three 14C pairs collected from the two-phase trilith sites indicated gaps between the trilith construction phases from 35 to 475 years (2 σ). The preliminary spatio-temporal analysis shows the geographical expansion of populations using trilith monuments during the 5th to 1st century BC and a later pull back in the 1st and 2nd century AD. The new 14C dataset for trilith sites will help towards a better understanding of Iron Age communities in southeastern Arabia.

scholarly journals Revealing the socio-economic vulnerability and multi-hazard risks at micro-administrative units in the coastal plains of Tamil Nadu, India

2021 ◽  
Vol 12 (1) ◽  
pp. 605-630
Author(s):  
Balasubramani Karuppusamy ◽  
Sekar Leo George ◽  
Kanagarajan Anusuya ◽  
Ravichandran Venkatesh ◽  
Periasamy Thilagaraj ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Coastal Plains ◽  
Economic Vulnerability ◽  
Administrative Units

Adult Pecan Weevil Emergence in the Upper Coastal Plains of South Carolina123

1972 ◽  
Vol 65 (3) ◽  
pp. 908-908 ◽  
Author(s):  
R. F. Nash ◽  
C. A. Thomas
Keyword(s):  
Coastal Plains

Religious Sectarianism in the Sertão of Northeast Brazil 1815-1966

1968 ◽  
Vol 10 (3) ◽  
pp. 369-383 ◽  
Author(s):  
Sue Anderson Gross
Keyword(s):  
Rio Grande ◽  
Northeast Brazil ◽  
Coastal Plains ◽  
Religious Groups ◽  
Social Phenomena ◽  
Time Periods ◽  
Afro Brazilian

Sectarian religious groups in Brazil, not of Afro-Brazilian origin, have been formed primarily in the backlands of the Northeast. There they have flourished during two approximate time periods, 1815 to 1840 and 1870 to the present. This paper will examine the religious groups of the Brazilian backlands as social phenomena.The locale of the sects, the backlands sertão, is both a geographical and cultural subregion of the Northeast. The latter area is generally defined as comprising the states of Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Sergipe, Alagôas, and northern Bahia. Geographically the sertão is an area subject to recurrent drought, lying back of fertile coastal plains from Salvador in Bahia to Natal in Rio Grande do Norte, touching the coast in Ceará, and again retreating inland in Piauí.

Precipitation Enhancement in Squall Lines Moving Over Mountainous Coastal Regions

2021 ◽  
Author(s):  
Fan Wu ◽  
Kelly Lombardo
Keyword(s):  
Convective Available Potential Energy ◽  
Leading Edge ◽  
Sea Breeze ◽  
Cold Pool ◽  
Pressure Perturbation ◽  
Coastal Regions ◽  
Low Level ◽  
Squall Lines ◽  
Sloping Terrain ◽  
Precipitation Enhancement

AbstractA mechanism for precipitation enhancement in squall lines moving over mountainous coastal regions is quantified through idealized numerical simulations. Storm intensity and precipitation peak over the sloping terrain as storms descend from an elevated plateau toward the coastline and encounter the marine atmospheric boundary layer (MABL). Storms are most intense as they encounter the deepest MABLs. As the descending storm outflow collides with a moving MABL (sea breeze), surface and low-level air parcels initially accelerate upward, though their ultimate trajectory is governed by the magnitude of the negative non-hydrostatic inertial pressure perturbation behind the cold pool leading edge. For shallow MABLs, the baroclinic gradient across the gust front generates large horizontal vorticity, a low-level negative pressure perturbation, and thus a downward acceleration of air parcels following their initial ascent. A deep MABL reduces the baroclinically-generated vorticity, leading to a weaker pressure perturbation and minimal downward acceleration, allowing air to accelerate into a storm’s updraft.Once storms move away from the terrain base and over the full depth of the MABLs, storms over the deepest MABLs decay most rapidly, while those over the shallowest MABLs initially intensify. Though elevated ascent exists above all MABLs, the deepest MABLs substantially reduce the depth of the high-θe layer above the MABLs and limit instability. This relationship is insensitive to MABL temperature, even though surface-based ascent is present for the less cold MABLs, the MABL thermal deficit is smaller, and convective available potential energy (CAPE) is higher.

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