Non CO2 Gases
Working GroupMission/Vision
To support common observations of soil N2O emissions from Common Experiment treatments at all LTAR sites.
Objectives
- To define a standardized minimum sampling design to address greenhouse gas questions across the LTAR network.
- To identify LTAR sites that are able to analyze gas samples for other sites.
- To coordinate use of LTAR Non-CO2 gas data to address network-wide questions.
Activities
List activities that are currently happening or that are planned for this working group.
Next steps (from Archbold meeting):
- Work closely with Soil WG to coordinate ancillary soils data needs (e.g. soil moisture, temperature, mineral N etc.)
- Send out survey to assess:
- Current N2O measurement activities including
- Treatments sampled
- Frequency of measurement
- Years of existing data
- List of publications
- Future plans
- Existing equipment and labor commitment
- Able to serve as consultant to other sites?
- Share photos
- Assess interest in contributing data for a paper on testing N2O models
- Current N2O measurement activities including
Accomplishments
- The group recommends using existing methodologies as defined by GRACEnet (http://www.ars.usda.gov/research/programs/programs.htm?np_code=212&docid=21223) and GRA (http://globalresearchalliance.org/wp-content/uploads/2015/11/Chamber_Methodology_Guidelines_Final-V1.1-2015.pdf)
- Sites without experience measuring N2O should identify a partner site with experience (possibly with similar land use treatments e.g. grasslands vs. croplands) for guidance on chamber design, chamber placement, sampling protocols etc.
- Key Questions identified by the group:
- Can existing N2O models (DayCent, DNDC, others?) predict N2O fluxes in response to N inputs (fertilizer, manure, urine, legume cover crops)?
- Comparing GHG balance and N2O-N (unit production)-1 in Business as Usual and Aspirational treatments in Common Experiment
- Can we improve IPCC national GHG inventory methods for agriculture (Tiers 2 and 3)?
Datasets Produced
- Soil moisture
- Soil temperature
- N2O emissions
Manuscripts Published
List of manuscripts published or under development with LTAR Meteorology datasets.
Working Group Name
Non CO2 Gases Working Group
Leader(s)
Michel Cavigelli
Members
List will appear here
ABOUT LTAR
The USDA Agricultural Research Service (ARS) Long-Term Agroecosystem Research network consists of 18 Federal and university agricultural research sites with an average of over 50 years of history. The goal of this research network is to ensure sustained crop and livestock production and ecosystem services from agroecosystems, and to forecast and verify the effects of environmental trends, public policies, and emerging technologies.