<div dir="ltr"><div>Re-posting Kirk's note here about the sun photometer data just to make sure everyone got it. I'm still working on adding the remaining talks to the Dropbox, but will let everyone know when that's finished. Hope the last few weeks post-ORACLES have been a bit more relaxing :)</div><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Knobelspiesse, Kirk D. (GSFC-6160)</b> <span dir="ltr"><<a href="mailto:kirk.d.knobelspiesse@nasa.gov">kirk.d.knobelspiesse@nasa.gov</a>></span><br>Date: Mon, Oct 10, 2016 at 7:16 AM<br>Subject: microtops sun photometer data from ORACLES<br><div style="word-wrap:break-word"><div><div><div><br></div></div></div><span style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><div dir="ltr"><div><div style="direction:ltr;color:rgb(0,0,0)"><font face="Calibri">
<div>Thanks to Sasha Smirnov at the NASA Goddard Space Flight Center, we now have processed data from the Microtops sun photometer that we used at the Walvis Bay Airport and Swakopmund Hotel during ORACLES!</div>
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<div>You'll see three files attached. The first is a text file produced by Sasha's data processing, which applies calibration, corrects for gaseous absorption, and removes data that were either mispointed at the sun or contaminated by clouds. </div>
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<div>I imported the text file into excel to help organize it a bit (file also attached). You'll see "level 1.0" data, for which cloud screening has not been applied, and "Level 1.5" data to which it has. You'll also see Water Vapor data from the Microtops.
I also computed the Angstrom Exponent in these files. </div>
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<div>Finally, I've plotted a day's worth of data - September 8th. That was the day I first demonstrated the Microtops to you. The different groups of measurements were performed by each of you. You'll notice that some groups have data that didn't make it through
the screening process. That's because of clouds (or because you didn't have a steady hand...). As you can see, the key to good data are frequent observations, even if the conditions were not changing rapidly as was the case on Sept. 8 at WVB. You can also
see (by the high Angstrom Exponent >1, not plotted) that the aerosols on that day were mostly small, indicating probably the presence of smoke. On the ground, of course, it felt dusty, but keep in mind that this measurement represents the entire atmospheric
column, so the smoke was probably far overhead. </div>
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<div>If you're interested, more data such as this can be found as part of the Maritime Aerosol Network at NASA (
<a href="http://aeronet.gsfc.nasa.gov/new_web/maritime_aerosol_network.html" target="_blank">http://aeronet.gsfc.nasa.gov/<wbr>new_web/maritime_aerosol_<wbr>network.html</a> ). At the bottom of that page you can find data from the RMS St. Helena and the RV Mirabilis, who also collected
Microtops data during ORACLES</div>
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<font face="Calibri" style="font-size:14px">Also, if you want a copy of the presentation about AERONET that I made, it can be found here:</font></div>
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<a href="https://www.dropbox.com/s/eqkf7jjz1f17bmf/knobelspiesse_ORACLES_aeronetstudent.pptx?dl=0" target="_blank"><font face="Calibri" style="font-size:14px">https://www.dropbox.com/s/<wbr>eqkf7jjz1f17bmf/knobelspiesse_<wbr>ORACLES_aeronetstudent.pptx?<wbr>dl=0</font></a></div>
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<div><font face="Calibri" style="font-size:14px">In any case, I appreciated working with you in Namibia, and hope you got something out of our your time with us as well. Hope to see you again in the future!</font></div>
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<div><font face="Calibri" style="font-size:14px">Best</font></div>
<div><font face="Calibri" style="font-size:14px">Kirk</font></div>
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<div><font face="Calibri" style="font-size:14px">PS, apologies if you receive this message twice, I’ve been having email issues…</font></div>
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<b><span style="font-family:Calibri,sans-serif">Kirk Knobelspiesse</span></b><span style="font-family:Calibri,sans-serif">, Research Oceanographer</span></p>
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<span style="font-family:Calibri,sans-serif">Ocean Ecology Laboratory, NASA Goddard Space Flight Center</span></p>
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<span style="font-family:Calibri,sans-serif"><a href="tel:%28301%29%20614-6242" value="+13016146242" target="_blank">(301) 614-6242</a>, <a href="mailto:kirk.knobelspiesse@nasa.gov" style="color:purple" target="_blank">kirk.knobelspiesse@<wbr>nasa.gov</a></span></p>
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<span style="font-family:Calibri,sans-serif"><a href="http://science.gsfc.nasa.gov/sed/bio/kirk.d.knobelspiesse" style="color:purple" target="_blank">http://science.gsfc.nasa.gov/<wbr>sed/bio/kirk.d.knobelspiesse</a></span></p>
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</div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">Michael S. Diamond<div>Graduate Student</div><div>Advisor: Dr. Rob Wood</div><div>Department of Atmospheric Sciences</div><div>University of Washington</div><div><br></div></div></div></div></div>
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