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

2. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
PEARL
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

3. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
PEARL
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

4. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
DIAL specification
System
Developer: Optech Inc & YorkU, 1992
Location: 80N, 86W, Eureka, Nunavut, Canada
Range: km
Resolution: 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: mrad
Receiver
Telescope Type: Newtonian
Aperture Dia.: 1 m
Focal Length: 2.5 m
FOV: to 1.0 mrad Wavelengths: 308, 353, 331.9, 385, nm
FWHM: 20, 20, 2, , 1 nm
Data Acquisition: Photon counting
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

5. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
DIAL schematics
May 10, 2018
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 Lidar measurements of the Arctic stratosphere. SPIE.
W. Steinbrecht Lidar measurements of ozone, aerosol and temperature… PhD thesis.
D. Donovan etal Ozone and aerosol observed by Lidar… GRL.
T. Duck High Arctic observations of strato-mesospheric temperatures… PhD thesis.
T. Kerzenmacher etal Measurements of O3, NO2 and Temperature… GRL.
E. Dupuy etal Validation of ozone measurements from the ACE. ACP.
Moss etal Calibration and validation of water vapour lidar measurements… AMT.
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

7. DIAL upgrade and operation schedule
Laser replacement, hardware issues
Raman data only
No funding
Operations on hold
New chopper, ISA-to-USB adapter for counter boards, servo control upgrade, new control and data acquisition software
Return signal in elastic channels
Feb 2015
DIAL is operational with some limitations
Elastic, Raman
Spring, Fall 2016
DIAL testing and tuning, participation in 2016 ACE/OSIRIS validation campaign
Spring, Fall 2017
2017 ACE/OSIRIS validation campaign
Application of traditional ozone retrieval algorithm (T.Leblanc et al., 2016, AMT)
Ozone products
Spring 2018
2018 ACE/OSIRIS validation campaign
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

8. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
DIAL observations:
2016, spring
2016, fall
2017, spring
2017, fall
2018, spring
2018, fall
dates TBD
May 10, 2018
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
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

10. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
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
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

11. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
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
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA

12. TOLNet/NDACC LWG Meeting, Huntsville, AL, USA
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 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
May 10, 2018
TOLNet/NDACC LWG Meeting, Huntsville, AL, USA