H. Fast (EC) and K. Shibata and Y. Makino (MRI) – Bomem DA8 system (0.004 cm-1 resolution) deployed in February 1993 and removed in February 2009. Intercompared with NPL mobile instrument in spring 1999. Data archived for the winters of 1996- 2000 and 2003-2006.
FTIR Spectrometer Bruker 125HR
Column - multiple species, Profile - multiple species
K. Strong (U. Toronto) – Bruker 125HR (0.0027 cm-1 resolution, mid-infrared), installed in July 2006. Direct-sun solar absorption spectra are collected in a semi-automated operation on clear-sky days from polar sunrise (approx. February 20) until polar sunset (approx. October 20). Three intercomparison campaigns with the Bomem DA8 FTIR (see above entry) were conducted prior to the removal of the DA8: February to April 2007, February to April 2008, and July 2007. Alternating mid-infrared NDACC and near-infrared TCCON measurements on a semi-daily basis since 2010. Operations in 2012 and 2013 were affected by budget cuts. New funding has enabled operations through to 2018.
T. Nagai (MRI) and O. Uchino (MRI) – Nd:YAG Lidar (1064 and 532 nm; dual polarization) deployed in February 1993. Operations were winter only. Operations were expanded to allow for tropospheric retrievals. Operations suspended after spring 2002. Data exist in the database for the two winters spanning 1993 – 1995.
Carswell (EC) – DIAL system (XeCl excimer laser similar to that at Toronto: 43.66˚N, 79.40˚W) deployed in February 1993 for winter season, nighttime only operations. Operation suspended after spring 2002. Data exists in the database for winters 1994 to 1998.
Weekly soundings at nearby weather station (79.99°N, 85.90°W, 10m asl); additional soundings in winter
D. Tarasick (EC) – ECC sondes launched once per week year-round beginning in November 1992, with two additional soundings per week in winter. NDACC data archiving began in 1996 under PI, Fast. Launches are currently taking place at the nearby Eureka weather station (79.99˚N, 85.90˚W, 10 masl).
UV/Visible Spectrometer DOAS
Column - multiple species
U. Toronto, Canada
O3, NO2, BrO, OClO. Permanent instrument installed 2006. Suntracker installed spring 2008 for direct sun and zenith-sky. Springtime zenith-sky measurements since 1999 with a similar UV/Vis instrument.
K. Strong (U. Toronto) – Two DOAS systems (Jobin-Yvon Triax-180 triple-grating spectrometers with CCD detector).
Primary: “PEARL-GBS” UV – permanently installed in August 2006. Sun-tracker installed in spring 2008 for direct sun, MAXDOAS, and zenith-sky viewing.
Secondary: “UT-GBS” UV – spring campaigns since 1999; permanently installed in 2011. Sun-tracker installed in fall 2014 for direct sun, MAX-DOAS, and zenith-sky viewing.
Measure column O3, NO2, BrO, and OClO from polar sunrise (~ February 20) until polar sunset (~ October 20). Intercomparison campaigns with a SAOZ instrument were conducted in spring 2007 and 2008. Operations in 2012 and 2013 were affected by budget cuts. New funding has enabled operations through to 2018.
EC: Environment Canada
MRI: Meterological Research Institute
CANDAC: Canadian Network for the Detection of Atmospheric Change