Research Projects
I am not actively seeking graduate students or post-docs as I have no funding
to support them.
Below is a description of some of my current research interests.
Merged Ozone Data (MOD)
MOD web page
Total Ozone Data Table
V8.7 SBUV MOD Through December 2020
The SBUV and TOMS instruments have been measuring the total column and profile
of ozone in the stratosphere since 1978. We have put together a Merged Ozone
Data page to describe the intercalibration of instruements to form a merged time
series of ozone. The paper [Stolarski and Frith, 2006] describing the first version of the data set can be
found here. An updated paper [Frith, et al., 2014]
describing the current MOD data set based on Version 8.6 SBUV measurements is found here. A more
recent
paper [Frith et al., 2017] on the vertical profile data set has recently been published in ACP.
References:
Stolarski, R.S. and S.M. Frith, "Search for evidence of trend slow-down in the long-term
TOMS/SBUV total ozone data record: the importance of instrument drift uncertainty" (2006),
Atmos. Chem. Phys. 6, 4057-4065.
Frith, S.M., N.A. Kramarova, R.S. Stolarski, R.D. McPeters, P.K. Bhartia, and G.J. Labow,
"Recent changes in total column ozone based on the SBUV Version 8.6 Merged Ozone Data Set" (2014),
J. Geophys. Res. 119, 9735-9751.
Frith, S.M., R.S. Stolarski, N.A. Kramarova, and R.D. McPeters, "Estimating uncertainties
in the SBUV Version 8.6 merged profile ozone data set" (2017), Atmos. Chem. Phys. 17, 14695-14707.
Total column ozone measurement time series from multiple SBUV instruments
integrated over latitudes from 60oS to 60oN with area weighting.
Ozone Trends and Recovery
A central question for ozone trend research is whether ozone measurements show that the
ozone layer is responding to the provisions of the Montreal Protocol. There are three
categories of potential answers to this question:
- The evidence demonstrates that ozone IS following the expectations from the
provisions of the Montreal Protocol.
- The evidence DOES NOT INDICATE one way or the other whether ozone is following the
expectations from the Montreal Protocol.
- The evidence indicates that ozone IS NOT following the expectations from the Montreal
Protocol.
There is a lot of evidence that can be examined to attempt to answer the question as to whether
or not ozone is following the expectations from the Montreal Protocol. It will become obvious
from the discussion below that the answer is not simple.
The Goddard 2D Photochemistry and Transport Model
I am also interested in using the Goddard 2D photochemistry and
transport model for a variety of scientific studies. Most stratospheric research has
moved on to 3D models that are based on atmospheric general circulation models (GCMs). I
still believe strongly in the importance of the simpler 2D model that can be used to
examine parameter space and sensitivity studies.
Below is a description of some of my current research interests.
Merged Ozone Data (MOD)
MOD web page
Total Ozone Data Table
V8.7 SBUV MOD Through December 2020
| The SBUV and TOMS instruments have been measuring the total column and profile
of ozone in the stratosphere since 1978. We have put together a Merged Ozone
Data page to describe the intercalibration of instruements to form a merged time
series of ozone. The paper [Stolarski and Frith, 2006] describing the first version of the data set can be
found here. An updated paper [Frith, et al., 2014]
describing the current MOD data set based on Version 8.6 SBUV measurements is found here. A more
recent
paper [Frith et al., 2017] on the vertical profile data set has recently been published in ACP.
References: Stolarski, R.S. and S.M. Frith, "Search for evidence of trend slow-down in the long-term TOMS/SBUV total ozone data record: the importance of instrument drift uncertainty" (2006), Atmos. Chem. Phys. 6, 4057-4065. Frith, S.M., N.A. Kramarova, R.S. Stolarski, R.D. McPeters, P.K. Bhartia, and G.J. Labow, "Recent changes in total column ozone based on the SBUV Version 8.6 Merged Ozone Data Set" (2014), J. Geophys. Res. 119, 9735-9751. Frith, S.M., R.S. Stolarski, N.A. Kramarova, and R.D. McPeters, "Estimating uncertainties in the SBUV Version 8.6 merged profile ozone data set" (2017), Atmos. Chem. Phys. 17, 14695-14707. |
Total column ozone measurement time series from multiple SBUV instruments integrated over latitudes from 60oS to 60oN with area weighting. |
Ozone Trends and Recovery
A central question for ozone trend research is whether ozone measurements show that the
ozone layer is responding to the provisions of the Montreal Protocol. There are three
categories of potential answers to this question:
|
| There is a lot of evidence that can be examined to attempt to answer the question as to whether or not ozone is following the expectations from the Montreal Protocol. It will become obvious from the discussion below that the answer is not simple. |
The Goddard 2D Photochemistry and Transport Model
| I am also interested in using the Goddard 2D photochemistry and transport model for a variety of scientific studies. Most stratospheric research has moved on to 3D models that are based on atmospheric general circulation models (GCMs). I still believe strongly in the importance of the simpler 2D model that can be used to examine parameter space and sensitivity studies. |