scholarly journals DESIGN OF A SMALL TIDAL INLET

1968 ◽  
Vol 1 (11) ◽  
pp. 78
Author(s):  
Morrough P. O'Brien ◽  
Leonardo Zeevaert
Keyword(s):  
Baja California ◽  
Pacific Coast ◽  
Tidal Inlet ◽  
Tidal Prism ◽  
Present Position ◽  
The South ◽  
Major Question ◽  
Small Boat ◽  
The North ◽  
The Pacific

Estero Punta Banda on the Pacific Coast of Baja California was to be improved and stabilized as a small boat harbor by the construction of twin jetties. The throat area-tidal prism relationship at this entrance agreed with that of other inlets on sandy coasts in equilibrium. This throat area was retained in the jetty spacing. The major question to be resolved was whether to retain the entrance in its present position at the north end of the lagoon or to cut a new entrance at the south end. The former position was chosen.

Mexico and the Pacific

2018 ◽  
Author(s):  
Edward R. Slack
Keyword(s):  
Mexican American ◽  
Pacific Coast ◽  
The United States ◽  
The Philippines ◽  
The South ◽  
Colonial Era ◽  
Porfirio Diaz ◽  
Mexican American War ◽  
The North ◽  
The Pacific

Called “Mar del Sur” [South Sea] when first spotted by Balboa in 1513 and dubbed “Mar Pacifíco” [Peaceful Calm Sea] by Ferdinand Magellan in 1520, the historical relationship between the Pacific Ocean and the people of Mexico is multilayered and dynamic. During the Spanish colonial era (1521–1821), the viceroyalty of New Spain (Nueva España) supervised the Asian and Polynesian colonies of the Philippines and Guam (and briefly Taiwan and the Spice island of Ternate) across the Pacific. Acapulco became a mythical emporium of exotic luxury supplied by the galleons from Manila that for 250 years tied Asia to the Iberian New World. Beyond this famous port, littoral native communities dotting the Pacific coast, from Oaxaca in the south to the forty-second parallel of Alta California in the north, gradually fell under Spanish secular and religious control. The enormous coastline measured approximately 5,400 miles, more than double the length of seaside territory facing the Gulf of Mexico. Following the War of Mexican Independence (1810–1821), the United Mexican States (Estados Unidos Mexicanos) emerged. For the next fifty years, Mexico experienced domestic political instability exacerbated by wars against the United States (Mexican-American War, 1846–1848) and France (1862–1867). When political order was finally established under the regime of Porfirio Díaz (1876–1910), regionalism was confronted by the centrifugal power of a modernizing, technocratic state. Despite losing 840 miles of California coastline, and a lucrative trade route with Manila, in the Mexican-American War, Mexico’s Pacific littoral in the south grew to incorporate the formerly Guatemalan territory of Chiapas, and a new shipping network evolved. Traditional research on pueblos, cities, or states along the Pacific coast emphasizes purely local or regional contexts within the colonial or independent Mexican state; or it is grouped thematically into studies about the galleon trade or California mission settlements. Recent scholarship is encouraging a more balanced approach, accentuating the many threads that wove a rich tapestry of Mexico’s unique relationship with the “Pacific World” (as opposed to the more popular “Atlantic World”); not only in a nationalist framework, but with inter-American and trans-Pacific or global dimensions.

Underground Houses on the British Columbian Coast

1944 ◽  
Vol 9 (3) ◽  
pp. 265-270 ◽  
Author(s):  
H. G. Barnett
Keyword(s):  
British Columbia ◽  
Bering Sea ◽  
Pacific Coast ◽  
River Valley ◽  
Fraser River ◽  
Northern California ◽  
The South ◽  
The North ◽  
The Pacific ◽  
The Way

Semi-Subterranean houses with an entrance through the roof are a well known feature of the interior of British Columbia, having been described for the Thompson, the Chilcotin, the Shuswap and others of the upper Fraser River valley. They have, in fact, an even wider distribution east of the Coast and Cascade Ranges, extending south over the Plateau and into northern California. Although this type of dwelling existed among the Aleuts, it appears that the coastal people to the south of them, even in Alaska, were either unfamiliar with the pattern or rejected it in favor of others. Sporadically, along the Pacific Coast all the way from California to Bering Sea, house floors were excavated to varying depths, sometimes even to two levels; but, everywhere, the houses characteristically lack the roof entrance and, except for sweathouses in the south and Bering Sea Eskimo dwellings in the north, even the idea of an earth covering is absent. In view of this fundamental divergence, it is interesting that subterranean structures do appear in several places on the coast of British Columbia.

scholarly journals A Phytogeographical Classification of the North American Pacific Coast Based on Climate, Vegetation and a Floristic Analysis of Vascular Plants

2009 ◽  
Vol 2009 ◽  
pp. 1-30 ◽  
Author(s):  
Manuel Peinado ◽  
Miguel Ángel Macías ◽  
Juan Luis Aguirre ◽  
José Delgadillo
Keyword(s):  
Vascular Plants ◽  
Baja California ◽  
Pacific Coast ◽  
Neotropical Flora ◽  
The North ◽  
The Pacific ◽  
Phytosociological Relevés ◽  
Objective Classification ◽  
Floristic Data ◽  
Floristic Variation

This study was designed to explore floristic variation along the Pacific coast from Cook Inlet, Alaska, to the southern tip of Baja California, Mexico. Data corresponding to 965 phytosociological relevés (including 686 vascular plants) obtained by sampling 279 coastal sites were examined. Using an objective classification system (Average Linkage Clustering), floristic data acquired in fieldwork were related to the macroclimates of the study area. The registered taxa were grouped into phytogeographical elements, giving rise to a phytogeographical classification in which eight floristic provinces were distinguished. Floristic differences among provinces were correlated with palaeoclimatic and palaeogeographical events. The boreal and temperate provinces show high percentages of broadly distributed elements, whose origins can be found in the Boreotropical or Arcto-Tertiary geoflora that dominated the Northern Hemisphere during the Tertiary. The floristically richest provinces are the three that occupy the Mediterranean zone, since these provinces harbour elements of Arcto-Tertiary and Madro-Tertiary geofloras. The flora of tropical Baja California is characterised by a high number of taxa related to Neotropical flora, especially to those showing links with South America.

scholarly journals The evolving response of mesopelagic fishes to declining midwater oxygen concentrations in the southern and central California Current

2018 ◽  
Vol 76 (3) ◽  
pp. 626-638 ◽  
Author(s):  
J Anthony Koslow ◽  
Pete Davison ◽  
Erica Ferrer ◽  
S Patricia A Jiménez Rosenberg ◽  
Gerardo Aceves-Medina ◽  
...  
Keyword(s):  
Baja California ◽  
Southern Oscillation ◽  
Global Climate ◽  
California Current ◽  
Deep Ocean ◽  
Near Surface ◽  
Oxygen Minimum Zones ◽  
The North ◽  
The Pacific ◽  
Oxygen Concentrations

Abstract Declining oxygen concentrations in the deep ocean, particularly in areas with pronounced oxygen minimum zones (OMZs), are a growing global concern related to global climate change. Its potential impacts on marine life remain poorly understood. A previous study suggested that the abundance of a diverse suite of mesopelagic fishes off southern California was closely linked to trends in midwater oxygen concentration. This study expands the spatial and temporal scale of that analysis to examine how mesopelagic fishes are responding to declining oxygen levels in the California Current (CC) off central, southern, and Baja California. Several warm-water mesopelagic species, apparently adapted to the shallower, more intense OMZ off Baja California, are shown to be increasing despite declining midwater oxygen concentrations and becoming increasingly dominant, initially off Baja California and subsequently in the CC region to the north. Their increased abundance is associated with warming near-surface ocean temperature, the warm phase of the Pacific Decadal oscillation and Multivariate El Niño-Southern Oscillation Index, and the increased flux of Pacific Equatorial Water into the southern CC.

War stimulus: The Japanese threat and rebirth of the North America Pacific Coast shipbuilding industry, 1937-1946

2021 ◽  
Vol 33 (2) ◽  
pp. 382-411
Author(s):  
Chris Madsen
Keyword(s):  
United States ◽  
Supply Chain ◽  
Pacific Coast ◽  
The United States ◽  
Pearl Harbor ◽  
Shipbuilding Industry ◽  
The North ◽  
The Pacific ◽  
Before And After ◽  
Strategic Procurement

Henry Eccles, in classic studies on logistics, describes the dynamics of strategic procurement in the supply chain stretching from home countries to military theatres of operations. Naval authorities and industrialists concerned with Japanese aggression before and after Pearl Harbor looked towards developing shipbuilding capacity on North America’s Pacific Coast. The region turned into a volume producer of merchant vessels, warships and auxiliaries destined for service in the Pacific and Indian Oceans. Shipbuilding involved four broad categories of companies in the United States and Canada that enabled the tremendous production effort.

scholarly journals Distribution and nutrient limitation of surfgrass, Phyllospadix scouleri and Phyllospadix torreyi, along the Pacific coast of Baja California (México)

2002 ◽  
Vol 74 (2) ◽  
pp. 121-131 ◽  
Author(s):  
P. Ramı́rez-Garcı́a ◽  
J. Terrados ◽  
F. Ramos ◽  
A. Lot ◽  
D. Ocaña ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Baja California ◽  
Pacific Coast ◽  
The Pacific

Clovis and Western Stemmed again: Reply to Fiedel and Morrow

2012 ◽  
Vol 77 (2) ◽  
pp. 386-397 ◽  
Author(s):  
Charlotte Beck ◽  
George T. Jones
Keyword(s):  
Pacific Coast ◽  
Supporting Evidence ◽  
Intermountain West ◽  
The South ◽  
Southern Plains ◽  
Technological Differences ◽  
The Pacific

AbstractFiedel and Morrow challenge our argument that Clovis technology originated in the southern Plains or Southeast and from there was carried by populations migrating north. Upon entering the Intermountain West relatively late, they encountered a population utilizing a different technology (Western Stemmed), the latter having arrived independently from the Pacific coast. Fiedel and Morrow offer arguments in favor of Clovis-first in the Intermountain West and coastal California and against the coastal route, Clovis origins in the south, and technological differences between Clovis and Western Stemmed. We evaluate these arguments and find their supporting evidence, when provided, meager and unconvincing.

scholarly journals MIS 5e sea-level history along the Pacific Coast of North America

2021 ◽  
Author(s):  
Daniel R. Muhs
Keyword(s):  
North America ◽  
Sea Level ◽  
Baja California ◽  
Pacific Coast ◽  
Level Indicator ◽  
Sequence Of Events ◽  
Marine Terraces ◽  
The Pacific ◽  
Mis 5E ◽  
Good Agreement

Abstract. The primary last interglacial, marine isotope substage (MIS) 5e records on the Pacific Coast of North America, from Washington (USA) to Baja California Sur (Mexico), are found in the deposits of erosional marine terraces. Warmer coasts along the southern Golfo de California host both erosional marine terraces and constructional coral reef terraces. Because the northern part of the region is tectonically active, MIS 5e terrace elevations vary considerably, from a few meters above sea level to as much as 70 m above sea level. The primary paleo-sea level indicator is the shoreline angle, the junction of the wave-cut platform with the former sea cliff, which forms very close to mean sea level. Most areas on the Pacific Coast of North America have experienced uplift since MIS 5e time, but the rate of uplift varies substantially as a function of tectonic setting. Chronology in most places is based on uranium-series ages of the solitary coral Balanophyllia elegans (erosional terraces) or the colonial corals Porites and Pocillopora (constructional reefs). In areas lacking corals, correlation to MIS 5e can sometimes be accomplished using amino acid ratios of fossil mollusks, compared to similar ratios in mollusks that also host dated corals. U-series analyses of corals that have experienced largely closed-system histories range from ~124 to ~118 ka, in good agreement with ages from MIS 5e reef terraces elsewhere in the world. There is no geomorphic, stratigraphic, or geochronology evidence for more than one high-sea stand during MIS 5e on the Pacific Coast of North America. However, in areas of low uplift rate, the outer parts of MIS 5e terraces apparently were re-occupied by the high-sea stand at ~100 ka (MIS 5c), evident from mixes of coral ages and mixes of molluscan faunas with differing thermal aspects. This sequence of events took place because glacial isostatic adjustment processes acting on North America resulted in regional high-sea stands at ~100 ka and ~80 ka that were higher than is the case in far-field regions, distant from large continental ice sheets. During MIS 5e time, sea surface temperatures (SST) off the Pacific Coast of North America were higher than is the case at present, evident from extralimital southern species of mollusks found in dated deposits. Apparently no wholesale shifts in faunal provinces took place, but in MIS 5e time, some species of bivalves and gastropods lived hundreds of kilometers north of their present northern limits, in good agreement with SST estimates derived from foraminiferal records and alkenone-based reconstructions in deep-sea cores. Because many areas of the Pacific Coast of North America have been active tectonically for much or all of the Quaternary, many earlier interglacial periods are recorded as uplifted, higher elevation terraces. In addition, from southern Oregon to northern Baja California, there are U-series-dated corals from marine terraces that formed ~80 ka, during MIS 5a. In contrast to MIS 5e, these terrace deposits host molluscan faunas that contain extralimital northern species, indicating cooler SST at the end of MIS 5. Here I present a standardized database of MIS 5e sea-level indicators along the Pacific Coast of North America and the corresponding dated samples. The database is available in Muhs (2021)  [https://doi.org/10.5281/zenodo.5557355].

scholarly journals NUEVOS HALLAZGOS Y DISTRIBUCIÓN DE ALGUNAS ESPECIES DE AGUAS PROFUNDAS DEL PACÍFICO DE COLOMBIA II. CALLIONYMIDAE (TELEOSTEI)

2016 ◽  
Vol 45 (1) ◽  
Author(s):  
Beatriz Susana Beltrán León ◽  
Raúl Ríos Herrera ◽  
Efraín Rubio Rincón
Keyword(s):  
Deep Sea ◽  
Pacific Coast ◽  
New Records ◽  
Distribution Range ◽  
Adult Fish ◽  
The South ◽  
Fishing Fleet ◽  
The North ◽  
The Family ◽  
Colombian Pacific

We present new records of larvae and adult fish from the family Callionymidae in the Colombian Pacific coast. Larvae and juvenile of Synchiropus atrilabiatus (Garman 1899), expands its distribution range within this coast (between Tumaco in the South to the border with Panama in the North), presenting low to medium abundances in September-October 2002, 2003, 2004, 2005 and February-March 2006, 2014. Larvae were always collected at stations 54 km away from the coast. Adults of S. atrilabiatus were collected as bycatch from the deep-sea shrimp fishing fleet between 67-700 m depth at Bahía Cupica in 1995 and Arusí in 2005.

Sign in / Sign up

Export Citation Format

Share Document