B036
Novel Methods and Models to Develop and Constrain Nitrogen Budgets from Hillslope to Watershed Scales

Session ID#: 161900

Session Description:
 Research over the last three decades has suggested that nitrogen retention within watershed ecosystems has changed. Nitrogen limitation often inhibits primary productivity in forest ecosystems, and recent evidence demonstrating  a decline in atmospheric input and a drop in exports of nitrogen, suggests an exacerbation of this limitation may occur in future. Accounting for this variability requires advances in field-based observations including isotope measurements, mechanistic modeling, remote sensing, and novel AI/ML techniques that together can be used to develop extensible, scaled-up patterns of heterogeneous watershed nitrogen budgets. In this session we invite contributions employing novel methods and models to constrain, and scale nitrogen budgets from hillslope-to-watershed scales. We particularly welcome contributions examining climate change impacts on nitrogen budgets within watersheds owing to shifts in ecosystem structure and the fundamental processes responsible for nitrogen retention and loss.
Index Terms:

0466 Modeling [BIOGEOSCIENCES]
0469 Nitrogen cycling [BIOGEOSCIENCES]
0480 Remote sensing [BIOGEOSCIENCES]

Primary Convener:  Michelle E Newcomer, Lawrence Berkeley National Laboratory, Berkeley, United States
Conveners:  Nicholas Bouskill, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States and Nicola Falco, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States
 
Detecting, Mapping and Modeling Changes in the Terrestrial N Cycle: Recent Surprises and Ongoing Challenges (1179716)
Scott V Ollinger1, Andrew Ouimette2, Jack Hastings3, Rachel E Mason4 and Zaixing Zhou1, (1)University of New Hampshire Main Campus, Durham, NH, United States, (2)University of New Hampshire, Department of Natural Resources and the Environment, Durham, United States, (3)University of New Hampshire Main Campus, Durham, United States, (4)Arizona State University, Center for Global Discovery and Conservation Science, Hilo, United States
 
Water Supply Processes Have Significant Impacts on Nitrogen Cycling Across the US (1061631)
Elizabeth Flint1, Matthew Ascott2, Daren Gooddy3, Ben Surridge1 and Mason Stahl4, (1)University of Lancaster, Lancaster, United Kingdom, (2)British Geological Survey Wallingford, Wallingford, United Kingdom, (3)British Geological Survey, Wallingford, United Kingdom, (4)Union College, Department of Geosciences, Schenectady, United States
 
A depth-resolved hillslope to floodplain budget for nitrogen within a high-altitude mountainous watershed (1155046)
Nicholas Bouskill1, Michelle E Newcomer2, Nicola Falco3, Wendy Brown4, Patricia M Fox1, Benjamin Gilbert1, Zhao Hao1, Patrick Sorensen3, Yuxin Wu3, Bhavna Arora1, Markus Bill1, Rosemary W H Carroll5, Chunwei Chou1, John Neil Christensen1, Mark E Conrad1, Dipankar Dwivedi1, Boris Faybishenko1, Amanda Henderson4, Carl I Steefel3, Lucien Stolze1, Shi Wang1, Helen Weierbach1, Hannah Naughton3, Kenneth Hurst Williams1 and Eoin Brodie3, (1)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States, (2)Lawrence Berkeley National Laboratory, Berkeley, United States, (3)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States, (4)Rocky Mountain Biological Laboratory, Gothic, United States, (5)Desert Research Institute Reno, Reno, NV, United States
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