# Presentation: 452537

## AmeriFlux Annual Meeting

- Bev Law
- October 17-19, 2007

## Agenda – Day 1

**AmeriFlux network progress **
- 8:00  AmeriFlux progress, syntheses (Bev Law)
- 8:50  Data submission guidelines, update on archive (Bev Law, Tom Boden)
- 9:10  DOE TCP activities (strategy, review, solicitation) (Roger Dahlman)
- 9:30** **State of Carbon Cycle Report (Tony King)
**10:00  Break**

## Updates

- Synthesis activities
- Site status
- ~93 active sites in 3 countries as of 10/07, 32 teams (22 w/multiple towers)
- Network in the future?
- Data management
- Submission protocols
- Sharing policies

## TERACC Soil Flux Workshop (UNH, 09/07)Planned Activities

- Compare 3-4 QA/QC procedures on same datasets (Hubbard et al.)
- Examine AmeriFlux/Fluxnet DIS procedures for registering automated Rs data (R. Vargas, A. Black, J. Curiel-Yuste et al.)
- Expand cross-site comparison of diel variation in Rs and Re (M. Ryan, J. Curiel-Yuste)
- Longer-term effort to obtain funding for future TERACC or NCEAS
- Workshop to advance additional cross-site comparisons to test specific hypotheses, using empirical and process-based models (L. Rustad, E. Davidson, committee)

## Fluxnet SynthesisLa Thuile Workshop (02/07)

- 50 proposals for syntheses on:
- Biophysical, albedo, land-use
- Carbon-water linkages
- Interannual variability
- Temporal variability extremes
- Disturbance – fire, management
- Drought effects on carbon, energy, water-use efficiency
- Specific biomes - Croplands, grasslands, wetlands
- Global upscaling (data oriented)

**Notes:**

L2 – data quality checked and formatted by CDIAC
L3 data – processed data with quality flags
L4 – L3 plus gap-filled, (ANN and MDS techniques) and ustar filtered records, GPP, Re. Flags with information regarding the quality of the original and gap-filled data. Data reported on varying time intervals (hourly, daily, weekly, monthly). Available only from the CDIAC anonymous ftp server . 

## Fluxnet Current and Future Science Directions

- Quantifying and understanding the controls on interannual variability of C and energy fluxes
- Monitoring the metabolism of ecosystems as we undergo global change
- NEE in Asia, Africa, India, Latin America and high arctic environments
- Data assimilation with tower data and models
- Adopting new technology for high precision CO2, CH4 to enhance flux measurements
- Boundary layer budgets using fluxes and high precision CO2 measurements
- Digital photos for phenology and dynamics of structure and function
- Spatial-temporal network-scale analysis

## N Am Sites that Contributed to Fluxnet Activity

## Fluxnet La Thuile Dataset – AmeriFlux Contributions

- 74 sites id’d as AmeriFlux in Fluxnet dataset account for 305 site-years of data
- 30% of the submitted AmeriFlux data didn’t make it into the Fluxnet dataset - lack of necessary measurements for standard computations, quality issues, currently inactive...
- Decline in 2006 data - Many sites didn’t submit 2006

- Growth of international network of flux towers

**Notes:**
La Thuille dataset
~30% of AmeriFlux site-years didn’t make it into Fluxnet synthesis set: Some of AmeriFlux sites didn’t submit 2006, some sites discontinued. Dario can’t process sites without storage term in forested sites
Concern over loss of observation base

## AmeriFlux Site Years of Data in Fluxnet La Thuile Dataset

- AmeriFlux Site Years of Data in Fluxnet La Thuile Dataset

**Notes:**
Surprising that roughly 30% of the Ameriflux site-years didn’t make it into the Fluxnet synthesis set. Some of the site-years that made it may or may not be useful for many analyses.

## Status of AmeriFlux Sites and Data (from AmeriFlux L2/L3/L4 ftp)

- Reporting sites = sites submitting data that year (blue)
- Median site years of record (red) of active reporting sites that year
- From 2000 - 2006, number of site-years of data more than doubled (41->103) AND the number of sites with at least 5 site-year of data increased from  6 to 54!
- Possible reasons for drop in 2005: Tardy reporting, loss of funding, artifact of campaigns

- Status of AmeriFlux Sites and Data (from AmeriFlux L2/L3/L4 ftp)

**Notes:**
Data are from the AMERIFLUX ftp site (L2/L3/L4 files)
The ORNL site has 3 ftp directories – need to get this down to one
This slide looks only at =active= rather than “total” sites. Here a site is “active” if data is reported that year. The dataset is clearly growing! 
One management takeaway is that there are clearly tardy reporting, i.e. sitting on 2005 data which is therefore also missing from the Fluxnet synthesis set (AmerFlux web site lists some sites as still active, yet no data for 2005+).  Some may also be an artifact of campaigns (eg the UCI Burn sites in CA).
A potential reason is that sites are still coming and going. This is clouded by the tardy reporting.  

## Length of AmeriFlux Data Record

- The good news: the new sites in 2000 still seem to be here
- The bad news: We should have more sites with longevity
- ~93 active sites in 3 countries as of 10/07, 32 teams (22 w/multiple towers)
- Major sponsors for active sites – DOE (39), USDA (15), NOAA (7), NSF(7), Universities (5), NASA (3), None (17)

**Notes:**
AmeriFlux L2/L3/L4 ftp site data used for this graph.

## AmeriFlux Partner Programs

- NACP
- Joint meeting 2009?
- Near term products (2 yrs from now) rely on AmeriFlux data, collaboration
- NACP synthesis strategy under development
- Other network interactions
- NPN
- NEON?

## Data Management DiscussionB.E. Law

## AmeriFlux Data Management – Biological Data

- Biological data submission guidelines:
- Site characteristics (IGBP veg types, ownership type,..)
- Disturbance history (type, date, comments)
- NEP components
- C stocks
- Physiology, soil processes (A-ci, Rs)
- Phenology
- Metadata on methods
- Ancillary data
- Ts, soil moisture profiles
- AmeriFlux submission protocols adopted by CarboEurope, NACP
- More biological data submissions needed!!

**Notes:**

L2 – data quality checked and formatted by CDIAC
L3 data – processed data with quality flags
L4 – L3 plus gap-filled, (ANN and MDS techniques) and ustar filtered records, GPP, Re. Flags with information regarding the quality of the original and gap-filled data. Data reported on varying time intervals (hourly, daily, weekly, monthly). Available only from the CDIAC anonymous ftp server . 

## AmeriFlux Data Sharing Policies

- AmeriFlux/Fluxnet processing
- L3 and L4 data were processed by CarboEurope
- AmeriFlux L3, L4 available on the AmeriFlux web site
- L3, L4 data from other networks participating in Fluxnet synthesis are subject to their data policies (e.g. Canadian Carbon Program, AsiaFlux; CarboEurope)
- Should our sharing policies change?

**Notes:**

L2 – data quality checked and formatted by CDIAC
L3 data – processed data with quality flags
L4 – L3 plus gap-filled, (ANN and MDS techniques) and ustar filtered records, GPP, Re. Flags with information regarding the quality of the original and gap-filled data. Data reported on varying time intervals (hourly, daily, weekly, monthly). Available only from the CDIAC anonymous ftp server . 

## Agenda – Day 1.1

**AmeriFlux network progress **
- 8:00  AmeriFlux progress, syntheses (Bev Law)
- 8:50  Data submission guidelines, update on archive (Bev Law, Tom Boden)
- 9:10  DOE TCP activities (strategy, review, solicitation) (Roger Dahlman)
- 9:30** **State of Carbon Cycle Report (Tony King)
**10:00  Break**

## Agenda – Day 1.2

**Ecosystem scale isotope fluxes** (Xuhui Lee, Dave Bowling)
- 10:30**  **Measurement and interpretation of water vapor isotopic fluxes (Xuhui Lee)
- 10:50  Forest-atmosphere exchange of carbon isotopes of CO2 (Dave Bowling)
- 11:10  Update on MIBA (Todd Dawson)
- 11:30  Modeling study of land-air isotopic exchange of water vapor and CO2 (David Noone)
**12:00-1:30****	****Lunch**

## Agenda – Day 1.3

**Ecosystem processes and interannual variation in fluxes (Andrew Richardson)**
- 1:30  Relation between phenology and fluxes (Andrew Richardson)
- 1:50  Interannual variation in carbon uptake capacity (Julian Hadley)
- 2:10  Interannual variability in fluxes at UMBS (Chris Gough/Peter Curtis)
- 2:30  NACP WG on reconciling EC and biometric NEP (Peter Curtis)
- 2:45 Discussion
**3:00 – 5:00**  Poster Session (Alpine and Executive Board Room)
**3:00 – 5:00**  Vendors (Ballroom Foyer)
**3:00 – 5:00**  AmeriFlux datacube tutorial – hands-on learning (Evergreen Room)
**3:00 – 5:00**  Gap-filling discussion (Driftwood Room)

## Agenda – Day 1.4

**3:00 – 5:00**  Poster Session (Alpine and Executive Board Room)
**3:00 – 5:00**  Vendors (Ballroom Foyer)
**3:00 – 5:00**  AmeriFlux datacube tutorial – hands-on learning (Evergreen Room)
**3:00 – 5:00**  Gap-filling discussion (Driftwood Room)

## Agenda – Day 2.1

**Integrating flux data and models (Jim Randerson)**
- 8:30  	Climate-biosphere modeling – continental and global 	patterns (Peter Thornton)
- 8:50  	How can land surface modelers learn from Fluxnet? 	(Reto Stockli)
- 9:10  	C4MIP and Carbon Land Model intercomparison Project 	(C-LAMP) (Forrest Hoffman)
- 9:30  	Initial C-LAMP model-data comparisons (Jim Randerson)
- 9:50  	Effective use of AmeriFlux data to improve carbon-	climate models (Discussion)
**10:10 – 10:30 Break**

## Agenda – Day 2.2

**Data assimilation and model uncertainty estimation (Yiqi Luo)**
- 10:30 	Data assimilation (Mat Williams)
- 10:50 	Data assimilation (Ankur Desai)
- 11:10 	Model uncertainty estimation (Yiqi Luo)
- 11:30 	Discussion – model uncertainty estimation
**12:00 – 1:30  Lunch**

## Agenda – Day 2.3

**Fossil fuel CO****2**** and non-CO****2**** GHGs (Marc Fischer, Bill Riley)**
- 1:30 Measuring and modeling fossil fuel emissions (Marc Fischer, Kevin Gurney)
- 1:50 Measuring and modeling atmospheric fossil CO2 (Bill Riley)
- 2:10 Methane and N2O flux measurements (Elizabeth Pattey)
- 2:30 Isotopes in an urban environment (Diane Pataki)

## Agenda – Day 2.4

- 3:00 – 5:00  Poster Session (Alpine and Executive Board Room)
- 3:00 – 5:00  Vendors (Ballroom Foyer)
- 3:00 – 5:00  AmeriFlux datacube demonstration (Evergreen Room)
- 4:00 – 5:00 AmeriFlux Steering Committee Meeting (Spruce Room)

## Agenda – Day 3.1

**Canopy-atmosphere interactions modeling (Monique LeClerc)**
- 8:30 Vegetation-atmosphere exchange: A new perspective (Monique LeClerc)
- 8:55 Mass balance measurements of horizontal and vertical advection of CO2 beneath a forest canopy (Ray Leuning)
- 9:20 Lagrangian analytic solution for in-canopy dispersion (Hong, J. et al.)
- 9:45 Alternative to u* threshold filtering to estimate nocturnal carbon efflux (Van Gorsel/Ray Leuning)
**10:10 Break**

## Agenda – Day 3.2

- 10:30	Flux bias and mesoscale transport (Larry Mahrt)
- 10:55	CarbonTracker & beyond - potential for mole fraction measurement to quantify the C cycle (Pieter Tans/ Arlyn Andrews)
- 11:20	Gap-filling wet conditions, summary gap-filling discussion (Nelson Dias)
**11:45****	****Adjourn**