Chapter 1 The Los Angeles Basin An Overview

1991 ◽  
Author(s):  
Kevin T. Biddle
Keyword(s):  
Los Angeles ◽  
Los Angeles Basin

An Eliminatory Option

2017 ◽  
Author(s):  
Kelly Lytle Hernández
Keyword(s):  
Los Angeles ◽  
Small Group ◽  
Indigenous Communities ◽  
Early Years ◽  
Los Angeles Basin ◽  
Spanish Colonial ◽  
Incarcerated Population ◽  
Del Rio ◽  
The City

The first chapter begins many millennia ago when the region now called the Los Angeles Basin was solely occupied by the Indigenous communities today collectively known as the Tongva-Gabrielino Tribe. This story is vital because there is no evidence that Tongva-Gabrielino communities ever tried or experienced human caging until the Spanish Crown dispatched a small group of colonists to establish El Pueblo de Nuestra Senora la Reina de Los Angeles del Rio Porciuncula, the City of Angels, in 1781. One of the first structures these colonists built was a jail. In time, the colonists and their descendants filled the jail with indios. Throughout the next century of colonial occupation in the Tongva Basin—spanning the Spanish colonial period (1781–1821), the Mexican era (1821–48), and the early years of U.S. rule (1848–70s)—Indigenous peoples consistently comprised a substantive, if not majority, portion of the incarcerated population in Los Angeles. Chapter 1, therefore, firmly grounds the origins of incarceration in Los Angeles with the dynamics of conquest and colonialism in the Tongva Basin.

The geodynamics of faults and petroleum migration in the Los Angeles basin, California

2015 ◽  
Vol 315 (5) ◽  
pp. 412-459 ◽  
Author(s):  
B. Jung ◽  
G. Garven ◽  
J. R. Boles
Keyword(s):  
Los Angeles ◽  
Los Angeles Basin ◽  
Petroleum Migration

Toward CO2 and CH4 measurements by ground-based observations of surface-scattered sunlight

2021 ◽  
Author(s):  
Benedikt Hemmer ◽  
Christin Proß ◽  
Stanley P. Sander ◽  
Thomas J. Pongetti ◽  
Zhao-Cheng Zeng ◽  
...  
Keyword(s):  
Los Angeles ◽  
Urban Areas ◽  
Near Infrared ◽  
Chem Phys ◽  
Retrieval Algorithm ◽  
Los Angeles Basin ◽  
Satellite Measurements ◽  
Precise Knowledge ◽  
Extended Sources

<div> <div>Precise knowledge of sources and sinks in the carbon cycle is desired to understand its sensitivity to climate change and to account and verify man-made emissions. In this context, extended sources like urban areas play an important role. While in-situ measurements of carbon dioxide (CO<sub>2</sub>) and methane (CH<sub>4</sub>) are highly accurate but localized, satellites measure column-integrated concentrations over an extended footprint. The CLARS-FTS [1, 2] stationed at the Mt. Wilson observatory looking downward into the Los Angeles basin has pioneered an innovative measurement technique that fills the sensitivity gap between in-situ and satellite measurements. The technique enables mapping the urban greenhouse gas concentration fields by collecting spectra of ground scattered sunlight and scanning through the region.</div> <div> </div> <div>Here, we report on progress developing a portable setup for a CLARS-FTS-like measurement geometry. The instrument is based on the EM27/SUN FTS with a modified pointing technique and a more sensitive detector. The retrieval algorithm is based on the RemoTeC software, previously employed for solar backscatter satellite measurements. We discuss first steps in terms of instrument performance and retrieval exercises. For the latter, we have carried out simulations on how the neglect of scattering by the retrieval affects the retrieved boundary layer concentrations of CO<sub>2</sub> and CH<sub>4</sub> for an ensemble of hypothetical scenes with variable complexity in aeorsol loadings and viewing geometry. We also report on a test to apply RemoTeC to a small set of CLARS-FTS spectra collected throughout the Los Angeles basin.</div> <div> </div> <div><em>References</em></div> <div>[1] Fu, D. et al., 2014: Near-infrared remote sensing of Los Angeles trace gas distributions from a mountaintop site, Atmos. Meas. Tech., 7, 713–729, https://doi.org/10.5194/amt-7-713-2014</div> [2] Wong, K. W. et al., 2015: Mapping CH4 : CO2 ratios in Los Angeles with CLARS-FTS from Mount Wilson, California, Atmos. Chem. Phys., 15, 241–252, https://doi.org/10.5194/acp-15-241-2015</div>

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