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Eureka Stratospheric Ozone Differential Absorption LIDAR: Status Report

Eureka Stratospheric Ozone Differential Absorption LIDAR: Status Report. A lexey B. Tikhomirov 1 Emily McCullough 1 James R. Drummond 1 Ghazal Farhani 2 , Robert J. Sica 2 Thierry Leblanc 3. 1 Dalhousie University, Halifax, NS, Canada 2 University of Western Ontario, London, ON, Canada

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Eureka Stratospheric Ozone Differential Absorption LIDAR: Status Report

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  1. Eureka Stratospheric Ozone Differential Absorption LIDAR: Status Report Alexey B. Tikhomirov1 Emily McCullough1 James R. Drummond1 Ghazal Farhani2, Robert J. Sica2 Thierry Leblanc3 1 Dalhousie University, Halifax, NS, Canada 2 University of Western Ontario, London, ON, Canada 3 Jet Propulsion Laboratory, Wrightwood, CA, USA TOLNet/NDACC LWG Meeting 7-11 May 2018, Huntsville, AB alexey.tikhomirov@dal.ca

  2. PEARL www.candac.ca TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  3. PEARL TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  4. DIAL specification System Developer: Optech Inc & YorkU, 1992 Location: 80N, 86W, Eureka, Nunavut, Canada Range: 1-60 km Resolution: 150 - 300 m typical Products: stratospheric O3, tropospheric H2O, temperature, gravity waves Laser Type: XeCl (IPEX – 848, LightMachinery) Wavelengths: 308 nm 353 nm (Raman H2) Output Energy: 152 mJ 20 mJ Pulse Duration: <20 ns Repletion Rate: up to 200 Hz Beam Divergence: 0.15 mrad Receiver Telescope Type: Newtonian Aperture Dia.: 1 m Focal Length: 2.5 m FOV: 0.2 to 1.0 mradWavelengths: 308, 353, 331.9, 385, 405.3 nm FWHM: 20, 20, 2, 0.5, 1 nm Data Acquisition: Photon counting TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  5. DIAL schematics TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  6. DIAL data and publications • Strengths: • Located in High Arctic – the northernmost stratospheric O3 DIAL in the world • Provides data on O3, H2O, T, aerosol using remote sensing technique • Night time instrument – do not require solar light for operation • Used for satellite data validation (ACE/OSIRIS) • Weaknesses: • Night time instrument – not operational during polar day • Requires clear sky for operation • A. Carswell etal. 1993. Lidar measurements of the Arctic stratosphere. SPIE. • W. Steinbrecht. 1994. Lidar measurements of ozone, aerosol and temperature… PhD thesis. • D. Donovan etal. 1996. Ozone and aerosol observed by Lidar… GRL. • T. Duck. 1999. High Arctic observations of strato-mesospheric temperatures… PhD thesis. • T. Kerzenmacher etal. 2005. Measurements of O3, NO2 and Temperature… GRL. • E. Dupuy etal. 2009. Validation of ozone measurements from the ACE. ACP. • Moss etal. 2013. Calibration and validation of water vapour lidar measurements… AMT. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  7. DIAL upgrade and operation schedule TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  8. DIAL observations: 2016-2017 2016, spring 2016, fall 2017, spring 2017, fall 2018, spring 2018, fall dates TBD TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  9. Ozone retrievals and data submission 2017, spring • Traditional ozone retrieval algorithm is applied: • T.Leblanc et al., 2016, AMT, part 1-3 • NDACC, CANDAC, Polar data catalog: • Data preparation in progress TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  10. Funding situation • Evidence for Democracy (E4D) has been active in lobbying various federal ministers about funding for the Canadian Climate and Atmospheric Research (CCAR) program • On September 15, 2017 E4D launched a new Save PEARL campaign • They see PEARL as the best vehicle for gaining public interest in the larger issue of CCAR and climate science funding • There was a response from the government within about an hour of the launch • See https://evidencefordemocracy.ca/save-pearl TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  11. Funding situation • Pending finalization of the funding agreement which is expected by mid-May 2018, the PEARL facility will be fully funded to September 2019 • This funding is considered “interim funding” until a new funding mechanism can be established – i.e. a new program or modification to an existing program to permit an application by PEARL for further continuation • As of mid-May 2018 this continuation program has neither been announced not implemented. We expect that since the federal budget did increase science funding considerably, that some announcement will be made later in 2018 TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

  12. Summary • DIAL operation status: • nominal operation (A.Tikhomirov, G.Farhani, E.McCullough) • ~4-6 weeks during spring + ~2 weeks during fall • Ozone retrievals: • traditional ozone retrieval technique has been applied (T.Leblanc) • Funding situation: • PEARL is funded till September 2019 • Work in progress: • Reprocessing of 2016-2018 data sets for data submission • Detailed intercomparison with other instruments (ACE FTS, FTIR, Brewer, GBS, E-AERI, ozonesondes) • Application of OEM to DIAL data sets (G.Farhani) • Future work: • Water vapor, temperature and density products PEARL research is supported by the Natural Sciences and Engineering Research Council (NSERC), Environment and Climate Change Canada (ECCC) and the Canadian Space Agency (CSA) 13-18 June 2016 TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

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