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<p class="MsoNormal" style="line-height:115%"><span style="line-height:115%;font-size:14px">Dear all,
<u></u><u></u></span></p>
<p class="MsoNormal" style="line-height:115%"><span style="line-height:115%;font-size:14px">Please join us this Thursday (11/16) for our speaker, Qin Ma, a PhD Candidate from UC Merced.
<u></u><u></u></span></p>
<p class="MsoNormal" align="center" style="text-align:center;line-height:115%"><b><span style="line-height:115%;font-size:14px"> </span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b style="font-size:14px">Qin Ma<u></u><u></u></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:14px">Environmental systems, UC Merced</span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:14px"><img src="cid:ii_15fb6a6984d22ebf" alt="Inline image 1" width="134" height="203" style="margin-right: 0px;"><br></span></p>
<p class="MsoNormal"></p><div style="text-align:center"><br></div><span style="font-family:Arial,sans-serif"><div style="text-align:center">
<p class="MsoNormal"><b>How has evapotranspiration
changed over the past three decades in California? </b><b><span style="font-family:Calibri,sans-serif">—an improved satellite-based evapotranspiration
estimation and analysis of forest fire disturbance.</span></b> </p></div>
<br>
<span style="font-size:9.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><b>Abstract:</b> </span></span><p></p><p class="MsoNormal">Evapotranspiration (ET), defined as water transferred from
land to the atmosphere via surface evaporation and vegetation transpiration, is
a key forest ecosystem component which connects the water, energy, and carbon
cycles. More than half of annual precipitation is allocated to ET in the
majority of California river basins. During dry years, ET has shown to exceed precipitation,
drawing from multi-year water storage. Thus, accurate spatial estimations of ET
is of great importance for water-resources management, particularly since drought,
wildfire, and tree mortality have become major concerns for California in
recent decades. Eddy-covariance flux towers provide high temporal (30-min) and
accurate observations of ET at the local scale (0.1-1km<sup>2</sup>), but huge uncertainties
exist in extrapolating these observations to the regional scale. We proposed an
improved satellite-based ET simulation method, which used non-linear multiple regression,
and accounted for the hysteretic effect of precipitation on ET. This method significantly
elevated ET estimation accuracies particularly during droughts using either
Landsat (30m) or MODIS (250m) satellite imagery. A preliminary analysis on 30-year
ET estimations indicated both controlled fire and wildfire fire had substantial
impacts on ET, on average reducing annual ET values by approximately 15% and
30%, respectively. This study could be useful for forest and water-resources
managers to develop strategies in the face of a changing climate and growing
population in California. <span></span></p><p class="MsoNormal"><br></p><p class="MsoNormal">
<span style="font-size:9.5pt;font-family:Arial,sans-serif">
<span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><b>Bio:</b></span><br></span>
</p><p class="MsoNormal"><span style="font-size:9.5pt;font-family:Arial,sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><b><br></b></span></span></p><p class="MsoNormal">Qin Ma is a PhD candidate in Environmental System at UC
Merced who uses remote sensing techniques to map and understand how forests respond
to climate change and human disturbances in California. Her current work focuses
on analyzing how forest fire, timber harvest, and climate change have impacted
vegetation evapotranspiration and tree growth using multi-source remote sensing
data from the individual tree (LiDAR) to forest stand (Aerial imagery) and
basin scales (Satellite imagery) in Sierra Nevada forests. Before joining UC
Merced in 2014, she received her B.A. in geography at Nanjing University, China
in 2011 and her M.Sc. in geography at University of Western Ontario, Canada in
2013. <span></span></p>
<p class="MsoNormal" style="text-align:center"><span style="font-size:14px"> </span><br></p>
<p class="MsoNormal"><span style="font-size:14px">When: Nov. 16<sup>th</sup>,<sup>
</sup>Thursday, 12pm – 1pm<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14px">Where: SE2-302 <u></u>
<u></u></span></p>
<p class="MsoNormal"><span style="font-size:14px"> </span></p>
<p class="MsoNormal"><span style="font-size:14px">Coffee will be provided, please bring your own mugs.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14px">We look forward to seeing you,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14px"> </span></p>
<p class="MsoNormal"><span style="font-size:14px">Organizers for 2017-18: Nate Bogie and Lixia Jin<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14px">Faculty coordinator: Asmeret Asefaw Berhe</span><font face="Times New Roman" style="font-size:9pt"><u></u><u></u></font></p>
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