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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">Hello everyone, </span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">This is a gentle reminder that our next Geospatial/GIS meetup will be held
<b>tomorrow</b>, Tuesday<b>, </b>May 13<b> </b>from<b> 12:00-12:50 pm.</b></span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">This meetup will be
<b>held on Zoom only</b>. </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:Aptos;color:black"><a href="https://ucr.zoom.us/j/98698561850?pwd=U7vwx7UUllSXX01Ds7wS5neMn0nyHp.1">https://ucr.zoom.us/j/98698561850?pwd=U7vwx7UUllSXX01Ds7wS5neMn0nyHp.1</a><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:Aptos;color:black">Meeting ID: 986 9856 1850<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:Aptos;color:black">Passcode: 780827<o:p></o:p></span></p>
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<p style="margin:0in;background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">Dr. Nan Li, Associate Project Scientist in Environmental Sciences, will give a presentation on
<b>From Prairie to Crop: Spatiotemporal Dynamics of Surface Soil Organic Carbon Stocks Over 160 Years in Illinois</b>.</span><span style="font-family:Aptos"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:Aptos">In this study, I explored the 160 years soil organic carbon (SOC) change across Illinois using geospatial modeling and machine learning. I applied a space-for-time
substitution approach, combining legacy soil data, historical land use/land cover records, and environmental covariates to estimate how SOC stocks have shifted from 1845 to 2012. Using random forest models, I mapped SOC at high resolution for both A horizons
and the 0–30 cm depth layer. The analysis revealed that converting native prairie and forest to cropland led to dramatic SOC losses—up to 50% in some regions, particularly in Mollisols of central Illinois. This work not only visualizes the long-term carbon
consequences of land use change but also pinpoints SOC loss hotspots that could be prioritized for carbon sequestration. By integrating GIS, historical datasets, and predictive modeling, I aimed to demonstrate how spatial tools can help us reconstruct environmental
baselines and support climate-resilient land management.<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">Dr. Nan Li is a project scientist at UC Riverside. Her research focuses on environmental soil physics, digital agriculture, and the application of geospatial
technologies and machine learning to study soil–plant–water interactions in agroecosystems. She integrates remote sensing, proximal sensing, and big data analytics to model soil moisture and nutrient dynamics across spatial and temporal scales. Nan has worked
on diverse projects across Australia, Illinois, and California, and is passionate about developing geospatial tools for sustainable land and water management.<br>
<br>
</span><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">The meetup will start with announcements of general interest.</span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:Aptos;color:black">Registration is appreciated but not required. If you have already registered, thank you! If not, you can register by responding to the calendar invitation you may have received
on May 1, or register through </span><u><span style="font-family:Aptos;color:#0563C1"><a href="https://www.eventbrite.com/e/geospatialgis-meetups-tickets-1307132952849?aff=oddtdtcreator">Eventbrite</a></span></u><span style="font-size:12.0pt;font-family:Aptos;color:black">.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:Aptos;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">The meetup will be recorded. (Please do not use AI note-taking tools; I’ll provide notes and a link to the recording after the meetup.)</span><o:p></o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">Feel free to forward this invitation to anyone who may be interested. <o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">I hope you can join us for this last presentation-focused meetup of the academic year!</span><o:p></o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:Aptos;color:black">Best,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">Janet Reyes</span></b><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in"><br>
<i>Geospatial Information Librarian</i></span><span style="font-size:12.0pt;color:#1F497D;border:none windowtext 1.0pt;padding:0in"><br>
</span>UCR Library | University of California, Riverside<span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">P.O. Box 5900 | Orbach Library, Room 118</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">Riverside, CA 92517-5900</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">Office: 951.827.6421 | Fax: 951.827.2255 | </span><span style="font-size:12.0pt;color:#0563C1;border:none windowtext 1.0pt;padding:0in"><a href="mailto:janet.reyes@ucr.edu"><span style="color:blue">janet.reyes@ucr.edu</span></a></span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in"> </span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in"><a href="https://library.ucr.edu/" title="https://library.ucr.edu/"><span style="color:blue">Web</span></a> | <a href="https://www.facebook.com/ucrlibrary" title="https://www.facebook.com/ucrlibrary"><span style="color:blue">Facebook</span></a> | <a href="https://www.instagram.com/ucrlibrary/" title="https://www.instagram.com/ucrlibrary/"><span style="color:blue">Instagram</span></a> | <a href="https://www.youtube.com/user/ucrlibraries" title="https://www.youtube.com/user/ucrlibraries"><span style="color:blue">YouTube</span></a></span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
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