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Central Valley Research Paper

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Words 1197
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Abstract
The Central Valley is an area of 18,000 square miles located in central California in the United States. Due to its size, the valley encompasses two different climate types, a hot Mediterranean climate (Csa) in its northern section and a low-latitude desert climate (BWh) in its southern section. These climate types, along with seasonality, latitude, and location affect the energy, moisture, and pressure of the area.

Introduction
Physiographic Setting of the Region
The Central Valley is located centrally in the heart of California and is surrounded by two mountain ranges, the Sierra Nevada Mountains to the east and the Coast Range to the west. It is about 450 miles long, parallels the Pacific Ocean, and spans approximately 18,000 …show more content…
Instead of flowing northeast from the Pacific Ocean along the Coast Range, the Central Valley has the majority of its wind blow in from the southwest Great Basin in Nevada. This area of high pressure then mixes with the Central Valleys low pressure causing strong, gusty winds known as the Santa Ana Winds (Climate of California). During the summer months, heated air from the Great Basin flows into the valley, causing widespread heatwaves, and in the winter months, this semi-heated air results in a mild and relatively dry winter (Climate of California). However, during winter months, high pressure storms from the Pacific Ocean can get blown into the low pressure valley resulting in the possibility of thunderstorms. A study operated by the Central California Ozone Study in 2011 revealed that summer-season wind extends 800-1000 m above the surface ( Zhong et al. 2004). Throughout the valley, the up-valley wind persists during the day and at night. However, when up-valley winds are close to the valley sidewalls, diurnal wind reversals occur (Zhong et al. 2004). The wind speeds that were measured showed diurnal oscillations that decrease with height and low-level wind maximum occurs around 300 m, with an exponential decrease in speed above the maximum (Zhong et al. …show more content…
Climate data for cities worldwide - Climate-Data.org. https://en.climate-data.org/ (Accessed April 26, 2017).

Climate of California. Climate of California | Western Regional Climate Center. http://www.wrcc.dri.edu/narratives/california/ (Accessed April 26, 2017).

Famiglietti, J. S., M. Lo, S. L. Ho, J. Bethune, K. J. Anderson, T. H. Syed, S. C. Swenson, C. R. de Linage, and M. Rodell (2011), Satellites measure recent rates of groundwater depletion in California's Central Valley, Geophys. Res. Lett., 38, L03403, doi:10.1029/2010GL046442.

Gaisma. Sunrise, sunset, dawn and dusk times around the World! Gaisma. http://www.gaisma.com/en/ (Accessed April 26, 2017).

Mera, R., N. Massey, D. E. Rupp, P. Mote, M. Allen, and P. C. Frumhoff, 2015: Climate change, climate justice and the application of probabilistic event attribution to summer heat extremes in the California Central Valley. Climatic Change, 133, 427–438, doi:10.1007/s10584-015-1474-3.

Sleeter, B.M., 2008. Late 20th century land change in the Central California Valley Ecoregion.

Zhong, S., C. D. Whiteman, and X. Bian, 2004: Diurnal Evolution of Three-Dimensional Wind and Temperature Structure in California's Central Valley. Journal of Applied Meteorology, 43, 1679–1699,

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