Micrometeorological Data for Analysis of Timing of Tree Growth

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Presentation transcript:

Micrometeorological Data for Analysis of Timing of Tree Growth Arizona NASA Space Grant Symposium 2015 By: Mathilde Westermann Acknowledgments: Dr. Malcolm Hughes, Dr. Kiyomi Morino, The U of A Laboratory of Tree Ring Research , & The Arizona NASA Space Grant Undergrad Internship Program

Introduction to the Study Snapshot of growth: July 2, 2014 (Mt Bigelow) 1. Cambium 2. Enlarging 3. Cell-wall thickening 4. Mature

Problem How do we get micro-scale temperature data? Quarter iButton™

Approach Air Temp. Bark Temp. Hole from core sampling

Site Map 30 Meters

Tree 224 on May 23, 2014

Tree 225 on August 18, 2014

North Tower on June 30, 2014

June 30, 2014 Tree 225 Tree 224

Function of nature Glitch in device ?

Is the temperature spike induced by direct sunlight? photo from: http://blog.summithut.com/post/2013/07/26/Incinerator-Ridge-Trail-Kellogg-Trail-Mount-Bigelow.aspx Sunrise from Kellogg Mountain http://blog.summithut.com/post/2013/07/26/Incinerator-Ridge-Trail-Kellogg-Trail-Mount-Bigelow.aspx

Experimental Design

Results

Conclusion Direct sun light does not appear to be the absolute cause of temperature spikes.

Next Steps Continue looking at sun angle and seasonal variability of spike. Conduct sapwood temperature experiment on Mt. Bigelow (perhaps related to morning sap flow in the tree?) Why does the spike rapidly decline? Does the spike affect tree growth??