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Register Number: ER65544
Title: Multi-scale Carbon Cycle Observations and Ecosystem Process Modeling at Niwot Rid
Principal Investigator: Bowling, David
Institution Address: Salt Lake City, UT 84102-1821
Awarded Amount to Date and B&R Code :
FY 2013$338 kKP170201
DOE Program Manager: James Kuperberg
BER Division: Climate and Environmental Sciences
Research Area: Terrestrial Ecosystem Science
Abstract Submit Date: 01/28/2014
Project Term: 09/01/2013 - 08/31/2016
Abstract: This project is a multi-scale investigation of carbon cycling at Niwot Ridge, Colorado, and application of the data to improve key components of a large earth system model called the Community Land Model (CLM). Our observations leverage and extend existing continuous long-term CO2 concentration and CO2 isotope records. The study involves a paired-site design, including measurements at an alpine tundra location and a nearby subalpine forest (the Niwot Ridge AmeriFlux tower). Measurements of CO2 and its stable isotope composition at these sites are ongoing and the record is now > 8 years. The analyses within this project will guide improvements to the representation of vegetation and belowground carbon cycling in CLM and provide important tests of modeled terrestrial ecosystem responses to disturbance and climate change. We will investigate linkages between ecosystem processes and atmospheric CO2 and CO2 isotopes. We will directly examine the isotopic composition of major land surface carbon sources and sinks and below ground carbon pools. This will provide essential understanding of mechanisms of carbon transfer that will allow us to improve the representation of within-plant isotopic changes and soil carbon decomposition pathways in CLM.