[Tiimes-extended] Seminar 3:30pm Asmeret Asefaw Berhe

[Terri Cantrell]

*Asmeret Asefaw Berhe*

*Effect of anticipated changes in amount & timing of rainfall in 
California on soil organic matter dynamics.*

*23 March*
*3:30pm  (refreshments 3:15pm)*
*FL2 - 1022*

Anticipated changes in climate are expected to have significant effect 
on biogeochemical cycling of essential elements in the critical zone. In 
California, over the next 100 years, a significant shift in rainfall 
amount and timing is expected. There is currently a disagreement whether 
the anticipated increase in rainfall will fall as either additional 
winter rain or result in extension of the rainy season into late spring 
and early summer months. In this presentation I will discuss results 
from a field rainfall addition experiment that was setup to test the 
effects of increased amount of rainfall (20% over ambient) and timing 
(no addition = control, increased rainfall in the rainy season = winter 
addition, or increased rainfall during late spring and early summer = 
spring addition treatment). Specifically, I will discuss results from 
work looking into changes in amount and biochemical composition of free 
light soil organic matter fraction (fLF, <1.7g/cm3 in 0-5 and 5-10cm 
soil depths) and association of soil organic matter storage with Fe and 
Al oxides (in the top 50cm soil). Our results suggest that rapid shifts 
in rainfall patterns could have



Link to flyer:
http://www.essl.ucar.edu/events/upload/abstract100575.pdf

-- 
_________________________________________

Terri A. Cantrell
303-497-8281

http://www.tiimes.ucar.edu
Acting Administrator


NCAR
The Institute for Integrative & Multidisciplinary Earth Studies (TIIMES)
P.O. Box 3000
FL1-2024
Boulder, CO 80307-3000

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