Analysis of transport patterns during an SCOS97-NARSTO episode

Boucouvala, D.; Bornstein, Robert D.

doi:10.1016/s1352-2310(03)00383-2

Cited by 32 publications

(20 citation statements)

References 14 publications

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“…The interaction between UHI circulation and the background flow has been examined in several studies [9,41,42]. For an urban area, there is generally a certain wind-speed threshold that determines the relative dominance and impacts of background versus UHI-induced flows.…”

Section: Uhi/uhii Reference Pointsmentioning

confidence: 99%

Characterization of Urban Heat and Exacerbation: Development of a Heat Island Index for California

Taha¹

2017

Climate

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Abstract:To further evaluate the factors influencing public heat and air-quality health, a characterization of how urban areas affect the thermal environment, particularly in terms of the air temperature, is necessary. To assist public health agencies in ranking urban areas in terms of heat stress and developing mitigation plans or allocating various resources, this study characterized urban heat in California and quantified an urban heat island index (UHII) at the census-tract level (~1 km 2 ). Multi-scale atmospheric modeling was carried out and a practical UHII definition was developed. The UHII was diagnosed with different metrics and its spatial patterns were characterized for small, large, urban-climate archipelago, inland, and coastal areas. It was found that within each region, wide ranges of urban heat and UHII exist. At the lower end of the scale (in smaller urban areas), the UHII reaches up to 20 degree-hours per day (DH/day; • C.hr/day), whereas at the higher end (in larger areas), it reaches up to 125 DH/day or greater. The average largest temperature difference (urban heat island) within each region ranges from 0.5-1.0 • C in smaller areas to up to 5 • C or more at the higher end, such as in urban-climate archipelagos. Furthermore, urban heat is exacerbated during warmer weather and that, in turn, can worsen the health impacts of heat events presently and in the future, for which it is expected that both the frequency and duration of heat waves will increase.

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Section: Uhi/uhii Reference Pointsmentioning

confidence: 99%

Characterization of Urban Heat and Exacerbation: Development of a Heat Island Index for California

Taha¹

2017

Climate

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“…This pressure gradient is controlled by the semi-permanent Pacific high, situated offshore central California, which diverts storms far to the north during summer. This pressure feature drives prevailing west-southwesterly winds at the regional scale in the California south coast air basins (Boucouvala and Bornstein, 2003).…”

Section: The Southern San Joaquin Valley Californiamentioning

confidence: 94%

Atmospheric characterization through fused mobile airborne and surface in situ surveys: methane emissions quantification from a producing oil field

et al. 2018

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Abstract. Methane (CH 4 ) inventory uncertainties are large, requiring robust emission derivation approaches. We report on a fused airborne-surface data collection approach to derive emissions from an active oil field near Bakersfield, central California. The approach characterizes the atmosphere from the surface to above the planetary boundary layer (PBL) and combines downwind trace gas concentration anomaly (plume) above background with normal winds to derive flux. This approach does not require a well-mixed PBL; allows explicit, data-based, uncertainty evaluation; and was applied to complex topography and wind flows.In situ airborne (collected by AJAX -the Alpha Jet Atmospheric eXperiment) and mobile surface (collected by AMOG -the AutoMObile trace Gas -Surveyor) data were collected on 19 August 2015 to assess source strength. Data included an AMOG and AJAX intercomparison transect profiling from the San Joaquin Valley (SJV) floor into the Sierra Nevada (0.1-2.2 km altitude), validating a novel surface approach for atmospheric profiling by leveraging topography. The profile intercomparison found good agreement in multiple parameters for the overlapping altitude range from 500 to 1500 m for the upper 5 % of surface winds, which accounts for wind-impeding structures, i.e., terrain, trees, buildings, etc. Annualized emissions from the active oil fields were 31.3 ± 16 Gg methane and 2.4 ± 1.2 Tg carbon dioxide. Data showed the PBL was not well mixed at distances of 10-20 km downwind, highlighting the importance of the experimental design.

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“…In particular, subtropical high-pressure systems are known to coincide with episodes of ground-level O 3 pollution. 14,16,18,[25][26][27][28][29][30][31][32][33][34] High-pressure systems are synonymous with large-scale subsidence through the troposphere, coinciding with stagnant conditions at Earth's surface. High concentrations of O 3 have been associated with highpressure systems and attendant subsidence, particularly when the anti-cyclonic circulation surrounding the center of high pressure is weak, leading to calm winds, sunny skies, and warm temperatures at ground level.…”

Section: Background O 3 and Meteorologymentioning

confidence: 99%

“…27 Similar high-pressure regimes contribute to an O 3 increase on the Pacific Coast of the United States, where the Pacific High tends to dominate. 31 The presence of the Pacific High, a broad, anticyclonic circulation, promotes stagnation within the boundary layer in the Los Angeles metropolitan area. 31 The Pacific High is marked by strong subsidence through the troposphere.…”

Section: Background O 3 and Meteorologymentioning

confidence: 99%

“…31 The presence of the Pacific High, a broad, anticyclonic circulation, promotes stagnation within the boundary layer in the Los Angeles metropolitan area. 31 The Pacific High is marked by strong subsidence through the troposphere. 32 In the south-central United States, a possible contribution of O 3 in Louisiana results from horizontal advection around the Bermuda High from sources in southeastern Texas.…”

Section: Background O 3 and Meteorologymentioning

confidence: 99%

See 1 more Smart Citation

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

Williams

Potter

Clarkson

et al. 2009

Journal of the Air & Waste Management Association

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Analysis of transport patterns during an SCOS97-NARSTO episode

Cited by 32 publications

References 14 publications

Characterization of Urban Heat and Exacerbation: Development of a Heat Island Index for California

Characterization of Urban Heat and Exacerbation: Development of a Heat Island Index for California

Atmospheric characterization through fused mobile airborne and surface in situ surveys: methane emissions quantification from a producing oil field

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

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