deletions | additions       diff --git a/Instruments_and_Data.tex b/Instruments_and_Data.tex  index 86cf437..c07386a 100644  --- a/Instruments_and_Data.tex  +++ b/Instruments_and_Data.tex 
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\subsection{Instruments and Data}  Ozonesondes are launched approximately weekly from Melbourne, Macquarie Island and Davis. For this study, we use the data collected between xx-xx (at Melbourne), xx-xx (at Macquarie Island) from 2004-2013 for Melbourne and Macquarie,  and xx-xx 2006-2013  (at Davis). We focus on these time periods given the more frequent data collection in more recent years \textbf{I think this is true... please check... SA}, although noting that at Davis, more frequent ozonesonde launches occur during the spring ozone hole season \citep{Alexander2013}. Ozonesondes provide much high vertical resolution profiles of ozone than that obtained from reanalyses. However, one data point per week from an ozonesonde flight is too low to be useful to diagnose the evolution of STT exchange over time-scales associated with normal synoptic scale weather patterns present in the extra-tropics. Instead, one of the purposes of this analysis is to construct a climatology of STT exchange, for which purpose we supplement the ozonesonde data with the ERA-Interim reanalyis reanalysis  \citep{Dee2011}. Specifically, we use ERA-Interim on various mid- and upper- tropospheric pressure levels to determine the synoptic conditions present when STT events are present in the ozonde sonde records. %approximately once per week. We analyse the data from xxOzonesondes from Davis, Macquarie, and Melbourne are released roughly weekly and capture ozone, temperature, pressure, relative humidity, and geopotential height up to around 700 times between the surface and 30km. %The information was gathered and provided by TODO: What were department names?  %Data exists from around 2000 to 2013 TODO: more exact? make table? 
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%In order to look at synoptic scale weather patterns during diagnosed STTs we are using the ERA-I datasets available from \cite{ECMWFDATA}.  %The ERA-I data we used for synoptic weather was of one degree horizontal resolution with pressure levels at 200, 300, 400, and 500 hPa.  %For individual cases ERA-I data was downloaded at .25 degree horizontal resolution with the full 34 pressure levels from 1000 to 1 hPa.