TOLNet/UAH Station Report – Operation, Upgrade, and Future Plan

TOLNet Working Group Meeting, NOAA/ESRL/CSD, Boulder, COJune 16 15:30, 2015

http://nsstc.uah.edu/atmchem

Shi Kuang1, Mike Newchurch1, John Burris2, Clayton Craft1, David Bowdle1, Guanyu Huang1

1UAHuntsville, 2NASA/GSFC

UAH Robert Cramer Research Hall

TOLNet

Outline

• Recent Hardware Development• Publications• Lidar Operation• Funding Sources• Future Plan

Recent Hardware Change

• After 14 May 2013, the dye laser transmitter was upgraded to a Raman-shifted laser transmitter at 289 and 299 nm for its easy installation, robustness, and good conversion efficiency. Correspondingly, the previous 285-291-nm band-pass solar filter was replaced by a 300-nm short-pass filter (for all receivers) accommodating the laser wavelength change.

Transmitter and solar filter

Previous: 532 YAG pumped dye lasers (285-291nm)

Current: 266 YAG pumped Raman-shifted (289-299nm)

266 Pump

High-alt PMT and Narrow-band Filter On 26 August 2014, the Hamamatsu PMTs replaced the EMI PMTs for the 40-cm receiver so that all the PMTs for the lidar were Hamamatsu (either R7400U or R9880U). On 22 October 2014, the narrow band filters at 289 and 299 nm replaced the 300-nm short-pass filter to reduce the daytime solar background to extend the highest daytime measurable altitude to ~12 km.

Hamamatsu R9880

EMI 9813

Receiving Optics

Receiving System for the Scanning O3 Lidar

PMT

PMT

Beam steering unit

299

289

284

8’’ Receiver

10/90 Beamsplitter

Bandpass filter

Licel TR

PD

Function generator

GateTrigger

PMT

Trigger

PMT

Dichroic Beamsplitter

299

284/289

UAH scanning ozone lidar

Vixen telescope (30cm)

Licel

Raman cellPump laser

Function generator

Receiving optics and PMT

Recent Referred Publication

• Wang, L., M. Cook, M. J. Newchurch, K. Pickering, A. Pour-Biazar, S. Kuang, W. Koshak, H. Peterson (2015), Tropospheric ozone lidar data evaluation of the lightning-induced ozone enhancement simulated by the WRF/Chem model, Atmospheric Environment, 115, 185-191, doi:10.1016/j.atmosenv.2015.05.054.

• Huang, G., M. J. Newchurch, S. Kuang, P. I. Buckley, W. Cantrell, and L. Wang (2015), Definition and determination of ozone laminae using Continuous Wavelet Transform (CWT) analysis, Atmospheric Environment, 104, 125-131, doi:10.1016/j.atmosenv.2014.12.027.

Year 2008 2009 2010 2011 2012 2013 2014

Days 27 40 55 46 38 57 41

UAH O3 lidar webpagehttp://nsstc.uah.edu/atmchem/lidar/DIAL_data.html

Data StatusTotal operational days

May 2-3, 2014

Funding Sources

• Major: NASA HQ TOLNet program for routine operation and scientific study

• Minor: 2014-2015 UAH Research Infrastructure Fund Program for truck and box modification

• Minor: 2014-2015 UAH Individual Investigator Distinguished Research (IIDR) Program for mobile system development

Planned Mobile Lab

Figure 1. Planned UAH mobile air-quality laboratory for simultaneous ozone and aerosol profiling. This mobile platform will include accommodations for a scanning ozone lidar with two telescopes for measuring different altitudes, an aerosol lidar, an ozonesonde station, and a surface air-pollutant measurement complement.

YAGYAG

Signal processing

In situ measurement kit O3, NO2, NO, CO, SO2

Aerosol Lidar

YAG

Ozonesonde station

Scanner532/1064 nm

289/299 nm

Ozone Lidar

Ozone lidar telescope (large)

Layout of the Planned RO3QUET Lidar

16’’ telescope

Raman cells

Kickout mirrors for scanning

4’’ telescope 1’’ receiver

Kickout mirrors for zenithFlip mirror