Becky Alexander

Becky Alexander

University of Washington, Seattle


Published on Dec 15, 2016

Final paper published!

Maria's final paper was published on Nov. 9 in the open access journal Atmospheric Chemistry and Physics.  You can read the abstract and download the paper here!If you're interested but don't want ...

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Published on May 19, 2016

Paper submitted for publication!

Maria has submitted her paper for publication in a scientific journal called Atmospheric Chemistry and Physics. This is an open-access journal, which means that anyone with access to the internet ...

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Published on Jul 30, 2015

You can’t blame it on the snow

Maria has completed her model calculations and has estimates of the role of snow in the recycling of reactive nitrogen in the Uintah Basin. I wanted to share her main conclusions with you here.The ...

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Published on May 26, 2015

UW Undergraduate Research Symposium

Lauren Easley, the UW undergraduate student who spent her summer in our lab measuring snow samples from Utah, gave a presentation on her data and our initial interpretation at the UW Undergraduate ...

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Published on Mar 05, 2015

Release of 2014 Uinta Basin Winter Ozone Study (UBWOS 2014) Report

The final report has been released and is available on-line. I will briefly summarize it here.While ground-level ozone exceedances (higher ozone concentrations than the 75 ppbv limit set by the EPA...

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Published on Nov 14, 2014

Relevant open-access article

An article was published today by a group at CU Boulder on the impact of oil and gas activities on VOC (volatile organic compound) concentrations in the Northern Front Range region of Colorado.  VO...

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Published on Oct 02, 2014

Maria's poster for upcoming workshop

After a productive summer, all of our measurements are complete.  Maria and I are going to the"Workshop on Chemical Atmosphere-Snow-Sea Ice Interactions" inCambridge, UK later this month.  Her post...

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Published on Aug 21, 2014

Lab work completed!

We have been working all summer on finishing up the measurements from this campaign.  We are finished, and have used up all of our snow and aerosol samples in the processes.  We hired a UW undergra...

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Published on Jun 12, 2014

UV absorption data

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Reply to:Ron SonntagRon Sonntag
Great question. Our initial interpretation of our results has not changed. This interpretation is that the recycling of reactive nitrogen through the snow is important only after fresh snowfall. We still need to put some numbers behind this, hence the computer model calculations. The question...more
Reply to:Ron SonntagRon Sonntag
The lighter isotopes are more easily broken apart by sunlight than the heavier isotopes because essentially the bond strength is higher for the heavier isotopes. (Another way to put it is that the zero-point energy is lower for the heavier isotopes.) This results in a 50 permil isotope fraction...more
Reply to:Ron SonntagRon Sonntag
All of the relevant meteorological variables are being measured by other groups. So we will have this useful information for our analysis!
Reply to:Carol SuessCarol Suess
We do some measurements right in the field, others are done in the lab in Utah, and still others will be done back at the UW. I will be providing information (with pictures!) about each measurement in future lab posts. Stay tuned!
Reply to:Chris HallChris Hall
Hi Chris, We are using glass fiber filters. We don't know yet whether or not we will need to impregnate them with NaOH. We have so far run a field blank, and started a sample yesterday where we have two filters placed back to back. If there's no nitrate on the second filter, then we are captu...more
Thanks for the offer Raymond! We will let you know if we think this will be useful.