Paleoclimate of the Gulf of California (Northwestern Mexico) During the Last 2000 Years

2019 ◽  
pp. 7-38
Author(s):  
Aída Martínez-López ◽  
Olivia de Los Ángeles Flores-Castillo ◽  
Romeo Saldívar-Lucio ◽  
Diana Cecilia Escobedo-Urías ◽  
Gerardo Verdugo-Díaz ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Northwestern Mexico

scholarly journals Development of Convective Systems over Baja California during Tropical Cyclone Linda (2003)

2005 ◽  
Vol 20 (5) ◽  
pp. 801-811 ◽  
Author(s):  
Luis M. Farfán
Keyword(s):  
Tropical Cyclone ◽  
Gulf Of California ◽  
Large Scale ◽  
Baja California ◽  
Precipitable Water ◽  
Sea Breeze ◽  
Convective Systems ◽  
Early Afternoon ◽  
Northwestern Mexico ◽  
Western Side

Abstract Characteristics of the life cycle and motion of convective systems that occurred over the Baja California Peninsula were determined from a case study in September of 2003. This note applies data from satellite imagery, regular observations from upper-air and surface networks, and operational analyses. Changes in environmental conditions over northwestern Mexico are documented and these are associated with the development of Tropical Cyclone Linda in the eastern Pacific Ocean. When Linda became a tropical storm and was located several hundred kilometers away to the southwest, a convective outbreak occurred over land. An examination of large-scale conditions indicated that flow from the eastern flank of Linda supplied low- to midlevel moisture. Significant convection is associated with specific thresholds for precipitable water, CAPE, and lifted index. Convective systems initiated in the early afternoon remained active for several hours and provided localized areas of precipitation along the western side of the peninsular mountains. An assessment of all the available surface data was performed to determine regional elements that played a role in the development of these systems. Results include documentation of a sea breeze from the Gulf of California onto the mountain slopes when organized convection was first detected.

scholarly journals Relationships between Gulf of California Moisture Surges and Tropical Cyclones in the Eastern Pacific Basin

2005 ◽  
Vol 18 (22) ◽  
pp. 4601-4620 ◽  
Author(s):  
R. W. Higgins ◽  
W. Shi
Keyword(s):  
Tropical Cyclones ◽  
Gulf Of California ◽  
Eastern Pacific ◽  
Pacific Basin ◽  
Northwestern Mexico ◽  
Regional Reanalysis ◽  
Relative Differences ◽  
National Hurricane Center ◽  
Tropical Moisture ◽  
Climate Prediction Center

Abstract Relationships between Gulf of California moisture surges and tropical cyclones (TCs) in the eastern Pacific basin are examined. Standard surface observations are used to identify gulf surge events at Yuma, Arizona, for a multiyear (July–August 1979–2001) period. The surges are related to TCs using National Hurricane Center 6-hourly track data for the eastern Pacific basin. Climate Prediction Center (CPC)- observed daily precipitation analyses and the NCEP Regional Reanalysis are used to examine the relative differences in the precipitation, atmospheric circulation, and moisture fields for several categories of surge events, including those that are directly related to TCs, indirectly related to TCs, and not related to TCs. It is shown that the response to the surge in the southwestern United States and northwestern Mexico is strongly discriminated by the presence or absence of TCs. Surges related to TCs tend to be associated with much stronger and deeper low-level southerly flow, deeper plumes of tropical moisture, and wetter conditions over the core monsoon region than surges that are unrelated to TCs. The response to the surge is also strongly influenced by the proximity of the TC to the Gulf of California (GOC) region. Tropical cyclones that track toward the GOC region exert a stronger, more direct influence on Yuma surges than those that track away from the GOC.

scholarly journals Influence of Tropical Cyclones on Humidity Patterns over Southern Baja California, Mexico

2007 ◽  
Vol 135 (4) ◽  
pp. 1208-1224 ◽  
Author(s):  
Luis M. Farfán ◽  
Ira Fogel
Keyword(s):  
Tropical Cyclones ◽  
Gulf Of California ◽  
Large Scale ◽  
Baja California ◽  
Deep Convection ◽  
Precipitable Water ◽  
Operational Model ◽  
Western Mexico ◽  
Surface Station ◽  
Northwestern Mexico

Abstract The influence of tropical cyclone circulations in the distribution of humidity and convection over northwestern Mexico is investigated by analyzing circulations that developed in the eastern Pacific Ocean from 1 July to 21 September 2004. Documented cases having some impact over the Baja California Peninsula include Tropical Storm Blas (13–15 July), Hurricane Frank (23–25 August), Hurricane Howard (2–6 September), and Hurricane Javier (15–20 September). Datasets are derived from geostationary satellite imagery, upper-air and surface station observations, as well as an analysis from an operational model. Emphasis is given to circulations that moved within 800 km of the southern part of the peninsula. The distribution of precipitable water is used to identify distinct peaks during the approach of these circulations and deep convection that occurred for periods of several days over the southern peninsula and Gulf of California. Hurricane Howard is associated with a significant amount of precipitation, while Hurricane Javier made landfall across the central peninsula with a limited impact on the population in the area. An examination of the large-scale environment suggests that advection of humid air from the equatorial Pacific is an important element in sustaining tropical cyclones and convection off the coast of western Mexico.

scholarly journals POLIQUETOS ERRANTES (POLYCHAETA: ERRANTIA) ESCLEROBIONTES DEL PUERTO DE MAZATLÁN, SINALOA (MÉXICO)

2016 ◽  
Vol 43 (1) ◽  
Author(s):  
Tulio F Villalobos Guerrero ◽  
María Ana Tovar Hernández
Keyword(s):  
Gulf Of California ◽  
Nominal Species ◽  
Tropical Eastern Pacific ◽  
Fouling Communities ◽  
Habitat Distribution ◽  
Species List ◽  
Polychaete Species ◽  
Navigation Channel ◽  
Northwestern Mexico ◽  
First Time

Mazatlan is the main sea and coastal port from northwestern Mexico. There are maritime metallic signaling buoys throughout the navigation channel, these provide a favorable substrate for the establishment of diverse fouling communities. This study discloses the composition of errant eunicemorph and phyllodocemorph polychaete species associated to metallic buoys during an annual cycle (2009). The polychaetofauna is represented by 6 families, 17 genera and 22 species. Nine are nominal species, seven are potentially new species and six require of detailed studies to clarify their identity. Pterocirrus (Phyllodocidae) is recorded by the first time in the Tropical Eastern Pacific. The habitat, distribution and taxonomic comments of the recorded species are indicated; furthermore, a fouling polychaete species list in the Gulf of California is included.

scholarly journals Influence of Spatial Resolution on Diurnal Variability during the North American Monsoon

2008 ◽  
Vol 21 (16) ◽  
pp. 3967-3988 ◽  
Author(s):  
J. Li ◽  
S. Sorooshian ◽  
W. Higgins ◽  
X. Gao ◽  
B. Imam ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Diurnal Cycle ◽  
Gulf Of California ◽  
The West ◽  
Diurnal Variability ◽  
Sierra Madre Occidental ◽  
Sierra Madre ◽  
Low Level Jet ◽  
Northwestern Mexico

Abstract Diurnal variability is an important yet poorly understood aspect of the warm-season precipitation regime over southwestern North America. In an effort to improve its understanding, diurnal variability is investigated numerically using the fifth-generation Pennsylvania State University (PSU)–NCAR Mesoscale Model (MM5). The goal herein is to determine the possible influence of spatial resolution on the diurnal cycle. The model is initialized every 48 h using the operational NCEP Eta Model 212 grid (40 km) model analysis. Model simulations are carried out at horizontal resolutions of both 9 and 3 km. Overall, the model reproduces the basic features of the diurnal cycle of rainfall over the core monsoon region of northwestern Mexico and the southwestern United States. In particular, the model captures the diurnal amplitude and phase, with heavier rainfall at high elevations along the Sierra Madre Occidental in the early afternoon that shifts to lower elevations along the west slopes in the evening. A comparison to observations (gauge and radar data) shows that the high-resolution (3 km) model generates better rainfall distributions on time scales from monthly to hourly than the coarse-resolution (9 km) model, especially along the west slopes of the Sierra Madre Occidental. The model has difficulty with nighttime rainfall along the slopes, over the Gulf of California, and over Arizona. A comparison of surface wind data from three NCAR Integrated Sounding System (ISS) stations and the Quick Scatterometer (QuikSCAT) to the model reveals a low bias in the strength of the Gulf of California low-level jet, even at high resolution. The model results indicate that outflow from convection over northwestern Mexico can modulate the low-level jet, though the extent to which these relationships occur in nature was not investigated.

First report, along with nomenclature adjustments, of Ulva ohnoi, U. tepida and U. torta (Ulvaceae, Ulvales, Chlorophyta) from northwestern Mexico

2019 ◽  
Vol 62 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Tonatiuh Chávez-Sánchez ◽  
Alejandra Piñón-Gimate ◽  
James T. Melton III ◽  
Juan Manuel López-Bautista ◽  
Margarita Casas-Valdez
Keyword(s):  
Gulf Of California ◽  
Cryptic Diversity ◽  
Ulva Rigida ◽  
La Paz ◽  
Ulva Intestinalis ◽  
Anatomical Characters ◽  
Ulva Ohnoi ◽  
Ulva Clathrata ◽  
Northwestern Mexico ◽  
High Degree

Abstract Examining morphological and anatomical characters, eight bloom-forming Ulva species were identified from La Paz Bay, Gulf of California, Mexico. However, DNA sequencing, using a multi-gene approach (rbcL, ITS2 and tufA) revealed that, of the eight species, four species were genetically distinct, none of which belonged to the species they would have been ascribed based on morpho-anatomical observations. The Ulva lactuca and Ulva rigida morphotypes (blades two cells thick, unbranched, attached by a small discoid holdfast) corresponded to Ulva ohnoi; the Ulva intestinalis morphotype (tubular and smooth thallus, one cell thick) corresponded to Ulva tepida; the Ulva clathrata and Ulva flexuosa morphotypes (tubular to slightly compressed thallus) corresponded to Ulva torta. The Ulva acanthophora morphotype (more or less tubular, profusely branched) did not correspond molecularly to any currently described species. Attempts to sequence the remaining two species, morpho-anatomically identified as Ulva lobata and Ulva nematoidea, were unsuccessful. This study similarly highlights the high degree of cryptic diversity in the genus Ulva, provides a nomenclature adjustment for several species of the genus Ulva from northwestern Mexico and is the first to report U. ohnoi, U. tepida and U. torta for the region.

scholarly journals New records of Lolliguncula (Lolliguncula) argus Brakoniecki & Roper, 1985 (Myopsida: Loliginidae) in northwestern Mexico

2017 ◽  
Vol 41 (3) ◽  
pp. 595-599
Author(s):  
Jasmín Granados-Amores ◽  
Frederick G. Hochberg ◽  
César A. Salinas-Zavala
Keyword(s):  
Natural History ◽  
Geographic Distribution ◽  
Gulf Of California ◽  
New Records ◽  
Maximum Size ◽  
Western Coast ◽  
Morphometric Data ◽  
Santa Barbara ◽  
Shrimp Fisheries ◽  
Northwestern Mexico

Seven specimens of Lolliguncula (Lolliguncula) argus, were collected in the shrimp fisheries of the Gulf of California and five specimens from the western coast of Baja California Peninsula, deposited in the Santa Barbara Museum of Natural History (USA), are examined and reported. These records expand species geographic distribution range for approximately 950 km and report the maximum size of mantle length 38.8 mm for males and 60.8 mm for females. Morphometric data of the 12 collected specimens are presented, and species funnel organ and statoliths are described.

Nonlinear inversion of isostatic residual gravity data from Montage Basin, northern Gulf of California

Geophysics ◽  
2017 ◽  
Vol 82 (3) ◽  
pp. G45-G55 ◽  
Author(s):  
Juan García-Abdeslem
Keyword(s):  
Inverse Problem ◽  
Gravity Anomaly ◽  
Gulf Of California ◽  
Gravity Data ◽  
Gravity Anomalies ◽  
Nonlinear Inversion ◽  
Residual Gravity ◽  
Sedimentary Sequences ◽  
Residual Gravity Anomaly ◽  
Northwestern Mexico

The flexural isostatic response to surface loads is used to estimate the crustal thickness in northwestern Mexico and Southwestern USA. This estimate is used to compute an isostatic regional gravity, which, subtracted from Bouguer gravity anomalies, led to the isostatic residual gravity anomaly at Montage Basin. This basin is located between the southern portion of the Mexicali Valley and the northern Gulf of California, it roughly has an extension of [Formula: see text] wide, and it shows a gravity minimum reaching approximately [Formula: see text]. Montage Basin is within the extensional province of the Gulf of California, where rifting is currently an ongoing geologic process, and deep exploratory wells drilled by Petróleos Mexicanos have shown that the basin accommodates thick sedimentary sequences greater than 5 km. The interpretation of the isostatic residual gravity anomaly is considered as a nonlinear inverse problem, constrained using density as a function of depth derived from Gardner’s equation applied to dual time [Formula: see text]-logs, assuming isostatic equilibrium and considering the basin as a subsurface load that is compensated at depth by a mass of unknown shape and density. The outcome of the inverse problem suggests that Montage Basin accommodates as much as 7.5 km thick sedimentary sequences and a compensating mass at a minimum depth of 13 km.

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