Speaker
Dr
Jeannette Wild
(ESSIC/UMD, NOAA/NCEP/CPC)
Description
Since the signing of the Montreal Protocol in 1987 and its subsequent agreements banning anthropogenic ozone depleting substances (ODS) the climate community has been anticipating the ability to detect the recovery of the ozone layer. This recovery is complicated by climate changes associated with the increase of CO2 in the both the troposphere and stratosphere. The Climate Prediction Center (CPC) has generated a long term total column and profile ozone climate data record (CDR) based on the SBUV and SBUV/2 on Nimbus 7 and the NOAA Polar Orbiting Environmental Satellites (POES): NOAA-9, -11, -14, -16, -17, -18 and -19 spanning 39 years from 1978 to 2017. This dataset uses observations from a single instrument for each time period and an adjustment scheme to remove inter-satellite differences. The last of these SBUV/2 instruments resides on NOAA-19 launched in 2009, and with drifting equatorial crossing time will soon loose latitudinal coverage, and be impacted by an increasing solar zenith angle. The Ozone Mapping and Profiler Suite (OMPS) instrument has replaced the SBUV/2 as the primary ozone monitoring instrument at NOAA. It is taking observations on the Suomi National Polar-orbiting Partnership (S-NPP) satellite which was launched in 2011 and is on JPSS satellites. JPSS-1 (NOAA-20) was launched on November 18, 2017, and later JPSS satellites will additionally carry the OMPS instrument. Reprocessed OMPS Nadir Profile (NP) and Nadir Mapper (NM) level 2 data has been made available by NESDIS/STAR covering the period from 2012 through 2016, and version 8.6 data is available through NASA. The OMPS NP has been characterized and calibrated to be very similar to the NOAA-19 SBUV/2. Results of extending the SBUV(/2) dataset with ozone profile data from OMPS are reviewed. Stability of ozone recovery trend estimates using these datasets are explored using the Hockey Stick approach of Reinsel (2002) near-globally (50N-50S), tropically and at mid-latitudes.
Primary author
Dr
Jeannette Wild
(ESSIC/UMD, NOAA/NCEP/CPC)
Co-author
Mr
Craig Long
(NOAA NCEP)
