Insight into the seasonal variations of the sea‐land breeze in Los Angeles with respect to the effects of solar radiation and climate type

2021 ◽  
Author(s):  
Lixing Shen ◽  
Chuanfeng Zhao ◽  
Xingchuan Yang
Keyword(s):  
Los Angeles ◽  
Solar Radiation ◽  
Seasonal Variations ◽  
Land Breeze ◽  
Climate Type ◽  
Insight Into

scholarly journals Correcting solar radiation from Reanalysis and Analysis datasets with systematic and seasonal variations

2021 ◽  
pp. 100933
Author(s):  
Zia ul Rehman Tahir ◽  
Muhammad Asim ◽  
Muhammad Azhar ◽  
Ghulam Moeenuddin ◽  
Muhammad Farooq
Keyword(s):  
Solar Radiation ◽  
Seasonal Variations

scholarly journals The effects of daily meteorological perturbation on pregnancy outcome: follow-up of a cohort of young women undergoing IVF treatment

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Mingpeng Zhao ◽  
Haoyang Zhang ◽  
Tarah H. B. Waters ◽  
Jacqueline Pui Wah Chung ◽  
Tin Chiu Li ◽  
...  
Keyword(s):  
Time Series ◽  
Solar Radiation ◽  
Time Series Analysis ◽  
Subgroup Analysis ◽  
Seasonal Variations ◽  
Multiple Logistic Regression Analysis ◽  
Human Reproduction ◽  
Mixed Effect ◽  
Series Analysis ◽  
Patient Consent

Abstract Background Human reproduction follows a seasonal pattern with respect to spontaneous conception, a phenomenon wherein the effect of meteorological fluctuations might not be unique. However, the effect of seasonal variations on patients who underwent in vitro fertilization (IVF) treatment is unclear. We aimed to evaluate the effects of meteorological variation on the pregnancy rate in a cohort undergoing IVF treatment by performing multivariable analyses. Methods We conducted a cohort study in a sub-tropical region with prominent seasonal variations (2005–2016). Women aged < 35 years who were treated with a long ovarian stimulation protocol and underwent fresh embryo transfer (ER) were included. Data on gonadotropin administration (CYCL), oocyte retrieval (OR), ER, and pregnancy outcomes were prospectively recorded. For each patient, the daily average of meteorological data (temperature, humidity, sunlight duration, solar radiation) was recorded from the date of CYCL to ER. Multiple logistic regression analysis adjusted for age, fertilization method, year of the cycle, gonadotropin dose, and transferred embryo grade was performed to determine the relationship between the meteorological parameters and clinical pregnancy. Patients with one successful cycle and one failed cycle were subtracted for a case-control subgroup analysis through mixed effect logistics regressions. Time-series analysis of data in the epidemic level was conducted using the distributed lag linear and non-linear models (DLNMs). Results There were 1029 fresh cycles in 860 women (mean age 31.9 ± 2.0 years). Higher mean temperature from CYCL to OR (adjusted odds ratio [aOR] 1.04; 95% confidence interval [CI] 1.01–1.07, P = 0.01) increased the odds of pregnancy, while OR to ER did not show any statistical significance. Compared to that in winter, the odds of becoming pregnant were higher during higher temperature seasons, summer and autumn (aOR 1.47, 95%CI 0.97–2.23, P = 0.07 (marginally significant) and aOR 1.73, 95%CI 1.12–2.68, P = 0.02, respectively). Humidity, sunlight duration, and solar radiation had no effect on the outcome. The subgroup analysis confirmed this finding. The time-series analysis revealed a positive association between temperature and relative risk for pregnancy. Conclusions In IVF treatment, the ambient temperature variation alters the pregnancy rates; this aspect must be considered when obtaining patient consent for assisted conception.

Transitional Labor: Undocumented Workers in the Los Angeles Automobile Industry

1983 ◽  
Vol 17 (4) ◽  
pp. 570-596 ◽  
Author(s):  
Rebecca Morales
Keyword(s):  
Labor Market ◽  
Los Angeles ◽  
Labor Force ◽  
Case Studies ◽  
Automobile Industry ◽  
Industrial Change ◽  
Undocumented Workers ◽  
Current Period ◽  
Insight Into

This article examines the employment of undocumented workers by Los Angeles manufacturers of automobile parts. It suggests that this is part of a broad trend towards primary labor market erosion. The labor force is termed transitional because it is seen as facilitating firms during the current period of industrial change. Insight into the role of these workers is derived from eight case studies representing 926 workers. Regressions on the determinants of wages and the percent undocumented in the workplace are developed from 21 firms and 2,321 workers.

scholarly journals Complete Genome Sequence of Pontibacter akesuensis Strain AKS 1 T , Which Exhibits Robust Nutrient Metabolism in Harsh Environments

2016 ◽  
Vol 4 (5) ◽  
Author(s):  
Yang Wang ◽  
Kaiyong He ◽  
Yongzhong Jiang ◽  
Jiate Shen ◽  
Bo Yu
Keyword(s):  
Solar Radiation ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Harsh Environments ◽  
Genetic Determinants ◽  
Nutrient Metabolism ◽  
Bacterial Genetic ◽  
Insight Into

Pontibacter akesuensis strain AKS 1 T was found in Akesu, Xinjiang Province, China, and exhibits the extraordinary ability to metabolize various substrates and is resistant to solar radiation. To gain insight into the bacterial genetic determinants for this adaptability, we report the complete genome sequence of strain AKS 1 T .

Prelude to “Prologue to Ask the Dust”

2020 ◽  
pp. 281-289
Author(s):  
Stephen Cooper
Keyword(s):  
Los Angeles ◽  
California State University ◽  
State University ◽  
Long Beach ◽  
75Th Anniversary ◽  
Italian American ◽  
John Fante ◽  
The One ◽  
First Time ◽  
Insight Into

In this talk, delivered at the 2014 California State University, Long Beach, symposium celebrating the 75th anniversary of the publication of Ask the Dust, Cooper recounts the story of how he came to discover a remarkable letter, to that point unknown, written by John Fante in 1933. Addressed to fellow Italian American writer Jo Pagano, who like Fante had ventured west from Colorado to seek writing success in Los Angeles, the letter provides insight into the crippling doubts and frustrations that burdened the young Fante even as it reveals his deep-seated confidence that he would one day write a great novel. Published here for the first time, this letter prefigures another remarkable Fante letter, the one written in 1938 that is now known as the Prologue to Ask the Dust.

scholarly journals On the Tropospheric Ozone Variations in a Coastal Area of Southwestern Europe under a Mesoscale Circulation

2010 ◽  
Vol 49 (4) ◽  
pp. 748-759 ◽  
Author(s):  
J. A. Adame ◽  
E. Serrano ◽  
J. P. Bolívar ◽  
B. A. de la Morena
Keyword(s):  
Solar Radiation ◽  
Coastal Area ◽  
Surface Ozone ◽  
Land Breeze ◽  
Industrial Complex ◽  
Atmospheric Conditions ◽  
Air Masses ◽  
Solar Radiation Intensity ◽  
Synoptic Forcing ◽  
The Mean

Abstract It is well established that surface ozone levels are greatly affected by orography, solar radiation intensity, meteorological conditions, and the levels of their precursors. In this work, the authors study the sea–land breeze circulation in its relation with the behavior of ozone in a coastal area, located in southwestern Europe, with high levels of solar radiation and an important industrial complex emitting air pollutants. Hourly mean data over a 7-yr period (1999–2005) have been used in the study. Two patterns of sea–land breeze have been identified after analyzing 2298 days of measurements: a “pure” breeze (179 cases) and another one, called a “nonpure” breeze (284 cases), which is the resulting flow of the former and northwesterlies synoptic forcing. Among other results, the highest levels of surface ozone were observed under pure sea–land breeze, with hourly values up to 100 μg m−3 in the mean daily evolution. In contrast, for a nonpure breeze, the 24-h average daily value was lower than the corresponding one under a pure breeze by a factor of 1.16 and could reach 1.60 in representative real cases. These findings give evidence that the formation and accumulation of ozone are favored by the conditions under a pure sea–land breeze: that is, perpendicular wind directions toward the coastline, effective recirculation of air masses, and formation of ozone residual layers above the sea. Because these atmospheric conditions occur in other coastal regions in the world, the conclusions of this study could be extended to them.

Optical properties and source identification of black carbon and brown carbon: comparison of winter and summer haze episodes in Xi'an, Northwest China

2019 ◽  
Vol 21 (12) ◽  
pp. 2058-2069 ◽  
Author(s):  
Qian Zhang ◽  
Zhenxing Shen ◽  
Yali Lei ◽  
Tian Zhang ◽  
Yaling Zeng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Particulate Matter ◽  
Black Carbon ◽  
Seasonal Variations ◽  
Source Identification ◽  
Fine Particulate Matter ◽  
Northwest China ◽  
Brown Carbon ◽  
Fine Particulate ◽  
Insight Into

Summer and winter fine particulate matter (PM2.5) samples were collected to provide insight into the seasonal variations of the optical properties and source profiles of PM2.5 black carbon (BC) and brown carbon (BrC) in Xi'an, China.

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