Nocturnal ozone enhancement in the lower troposphere observed by lidar

Kuang, Shi; Newchurch, M. J.; Burris, J.; Wang, Lihua; Buckley, Patrick I.; Johnson, Stephen B.; Knupp, Kevin R.; Huang, Guanyu; Phillips, Dustin; Cantrell, W.

doi:10.1016/j.atmosenv.2011.07.038

Cited by 34 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…GEOS-5 meteorological data indicates that a weak low level jet (LLJ) may have been occurring as the westerly wind component (U wind) below 2 km increased from <5 m·s −1 at 00 UTC (07pm CDT) to >10 m·s −1 at 09 UTC (04am CDT). LLJs occur frequently in the southeast US and can transport O3 and precursor species from urban regions to rural areas in the late afternoon and night-time hours resulting in nocturnal O3 enhancements (e.g., [17]). Long-range/stratospheric sources contributed O3 mixing ratios near the surface which were similar to monthly-averaged values (~20 nmol mol −1 ).…”

Section: June 2013mentioning

confidence: 99%

“…The accuracy of the system has been discussed in previous studies and Lidar measurement precision is estimated to be ±10% in the lower troposphere and ±20% in the upper troposphere [15,16]. Data from the UAH TOLNet lidar system is publically available [14] and has been used to examine atmospheric chemistry relevant topics such as air pollution transport, nocturnal O 3 enhancements, stratosphere-troposphere exchange, boundary layer pollution entrainment, wildfire impacts on O 3 , and lightning NO x generated O 3 (e.g., [17][18][19]). During this study we evaluated all UAH TOLNet observations for the month of June 2013 to identify anomalous O 3 lamina (see Section 3.1).…”

Section: Tolnet Ozone Lidar Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating Summer-Time Ozone Enhancement Events in the Southeast United States

et al. 2016

Self Cite

View full text Add to dashboard Cite

This study evaluates source attribution of ozone (O 3 ) in the southeast United States (US) within O 3 lamina observed by the University of Alabama in Huntsville (UAH) Tropospheric Ozone Lidar Network (TOLNet) system during June 2013. This research applies surface-level and airborne in situ data and chemical transport model simulations (GEOS-Chem) in order to quantify the impact of North American anthropogenic emissions, wildfires, lightning NO x , and long-range/stratospheric transport on the observed O 3 lamina. During the summer of 2013, two anomalous O 3 layers were observed: (1) a nocturnal near-surface enhancement and (2) a late evening elevated (3-6 km above ground level) O 3 lamina. A "brute force" zeroing method was applied to quantify the impact of individual emission sources and transport pathways on the vertical distribution of O 3 during the two observed lamina. Results show that the nocturnal O 3 enhancement on 12 June 2013 below 3 km was primarily due to wildfire emissions and the fact that daily maximum anthropogenic emission contributions occurred during these night-time hours. During the second case study it was predicted that above average contributions from long-range/stratospheric transport was largely contributing to the O 3 lamina observed between 3 and 6 km on 29 June 2013. Other models, remote-sensing observations, and ground-based/airborne in situ data agree with the source attribution predicted by GEOS-Chem simulations. Overall, this study demonstrates the dynamic atmospheric chemistry occurring in the southeast US and displays the various emission sources and transport processes impacting O 3 enhancements at different vertical levels of the troposphere.

show abstract

Section: June 2013mentioning

confidence: 99%

Section: Tolnet Ozone Lidar Measurementsmentioning

confidence: 99%

Evaluating Summer-Time Ozone Enhancement Events in the Southeast United States

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…The lidar receiver configuration is similar to that reported by Kuang et al [12] except for the addition of a 2.5 cm mini-receiver and a beamsplitter in the 10 cm receiver. In 2008, a 10%-90% beamsplitter was integrated into the 10 cm receiver and extended the observations down to ∼500 m AGL using the 10% channel [20,21]. Modifying a design used in a previous National Aeronautics and Space Administration (NASA) airborne lidar campaign [22], a 2.5 cm diameter receiver was recently added to lower the lidar's minimum observable altitude.…”

Section: B Lidar Receivermentioning

confidence: 99%

Ground-based lidar for atmospheric boundary layer ozone measurements

et al. 2013

Self Cite

View full text Add to dashboard Cite

Ground-based lidars are suitable for long-term ozone monitoring as a complement to satellite and ozonesonde measurements. However, current ground-based lidars are unable to consistently measure ozone below 500 m above ground level (AGL) due to both engineering issues and high retrieval sensitivity to various measurement errors. In this paper, we present our instrument design, retrieval techniques, and preliminary results that focus on the high-temporal profiling of ozone within the atmospheric boundary layer (ABL) achieved by the addition of an inexpensive and compact mini-receiver to the previous system. For the first time, to the best of our knowledge, the lowest, consistently achievable observation height has been extended down to 125 m AGL for a ground-based ozone lidar system. Both the analysis and preliminary measurements demonstrate that this lidar measures ozone with a precision generally better than ±10% at a temporal resolution of 10 min and a vertical resolution from 150 m at the bottom of the ABL to 550 m at the top. A measurement example from summertime shows that inhomogeneous ozone aloft was affected by both surface emissions and the evolution of ABL structures.

show abstract

“…High resolution and continuous observational capability make lidars ideal instruments to capture rapid variations in ozone distribution (Kuang et al, 2011a(Kuang et al, , 2012. This paper evaluates the tropospheric ozone variability associated with lightning events as measured by the Rocket-city O 3 Quality Evaluation in the Troposphere (RO 3 QET) lidar in Huntsville, AL, and simulated by the Weather Research and Forecasting (WRF) model coupled with Chemistry (WRF/Chem).…”

Section: Introductionmentioning

confidence: 99%