Differential Absorption Lidar to Measure Subhourly Variation of Tropospheric Ozone Profiles

Kuang, Shi; Burris, J.; Newchurch, M. J.; Johnson, Steven C.; Long, S.

doi:10.1109/tgrs.2010.2054834

Cited by 42 publications

(43 citation statements)

References 83 publications

(5 reference statements)

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“…Another 266-nm Nd:YAG laser with the same frequency pumps another Raman cell with a mixture of hydrogen and argon to produce the off-line laser at 299 nm with an output energy of 5 mJ/pulse. The receiving system consists of three receivers at 2.5, 10, and 40 cm, and four photomultipliers similar to that described by [15]. Due to the fact that a 300-nm short-pass filter is used as a solar-blind filter for all channels, the day-time maximum measurable altitude is only~5 km.…”

Section: Tolnet Ozone Lidar Measurementsmentioning

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]).…”

Section: Tolnet Ozone Lidar Measurementsmentioning

confidence: 99%

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

et al. 2016

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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.

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Section: Tolnet Ozone Lidar Measurementsmentioning

confidence: 99%

Section: Tolnet Ozone Lidar Measurementsmentioning

confidence: 99%

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

et al. 2016

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“…These schemes iteratively substitute derived ozone from the DIAL equation into the lidar equation to solve aerosol extinction and backscatter until both aerosol and ozone converge Kuang et al, 2011;Sullivan et al, 2014). The differential aerosol backscatter and extinction were calculated with the approximation from Browell et al (1985).…”

Section: Lidar Data Processing and Retrieval Algorithmsmentioning

confidence: 99%

“…Merging between different altitude channels, either different telescopes or different optical channels of the same telescope, is challenging with limited methodologies reported in the literature (Kuang et al, 2011). It is difficult to specify a method for all groups because merging is system-dependent and is affected by many factors previously described.…”

Section: Lidar Data Processing and Retrieval Algorithmsmentioning

confidence: 99%

Quantifying TOLNet ozone lidar accuracy during the 2014 DISCOVER-AQ and FRAPPÉ campaigns

Wang¹,

Newchurch²,

Alvarez³

et al. 2017

Atmos. Meas. Tech.

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Abstract. The Tropospheric Ozone Lidar Network (TOLNet) is a unique network of lidar systems that measure highresolution atmospheric profiles of ozone. The accurate characterization of these lidars is necessary to determine the uniformity of the network calibration. From July to August 2014, three lidars, the TROPospheric OZone (TROPOZ) lidar, the Tunable Optical Profiler for Aerosol and oZone (TOPAZ) lidar, and the Langley Mobile Ozone Lidar (LMOL), of TOLNet participated in the Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) mission and the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) to measure ozone variations from the boundary layer to the top of the troposphere. This study presents the analysis of the intercomparison between the TROPOZ, TOPAZ, and LMOL lidars, along with comparisons between the lidars and other in situ ozone instruments including ozonesondes and a P-3B airborne chemiluminescence sensor. The TOLNet lidars measured vertical ozone structures with an accuracy generally better than ±15 % within the troposphere. Larger differences occur at some individual altitudes in both the near-field and far-field range of the lidar systems, largely as expected. In terms of column average, the TOLNet lidars measured ozone with an accuracy better than ±5 % for both the intercomparison between the lidars and between the lidars and other instruments. These results indicate that these three TOLNet lidars are suitable for use in air quality, satellite validation, and ozone modeling efforts.

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“…The TOLNet lidars generally retrieve ozone at an uncertainty of ~10% at near-range and ~20% at far range with an integration time of few minutes and vertical resolution of hundreds of meters [4,6,7,8]. Most of the TOLNet lidars validate their ozone retrievals using collocated ozonesonde measurements although occasional intercomparison between TOLNet lidars was made (e.g., during the summer 2014 DISCOVER-AQ Boulder campaign).…”

Section: Lidar Data Qa/qc and Archivingmentioning

confidence: 99%

TOLNET – A Tropospheric Ozone Lidar Profiling Network for Satellite Continuity and Process Studies

Newchurch

Kuang

Leblanc

et al. 2016

EPJ Web of Conferences

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Ozone lidars measure continuous, highresolution ozone profiles critical for process studies and for satellite validation in the lower troposphere. However, the effectiveness of lidar validation by using single-station data is limited. Recently, NASA initiated an interagency ozone lidar observation network under the name TOLNet to promote cooperative multiple-station ozone-lidar observations to provide highly timeresolved (few minutes) tropospheric-ozone vertical profiles useful for air-quality studies, model evaluation, and satellite validation. This article briefly describes the concept, stations, major specifications of the TOLNet instruments, and data archiving.

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Differential Absorption Lidar to Measure Subhourly Variation of Tropospheric Ozone Profiles

Cited by 42 publications

References 83 publications

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

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

Quantifying TOLNet ozone lidar accuracy during the 2014 DISCOVER-AQ and FRAPPÉ campaigns

TOLNET – A Tropospheric Ozone Lidar Profiling Network for Satellite Continuity and Process Studies

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