ChEAS workshop directions ChEAS meeting attendee instructions ChEAS workshop directions ChEAS 2002 Workshop
Chequamegon Ecosystem-Atmosphere Study (ChEAS) 2003 Meeting
Kemp Natural Resources Station, Woodruff, WI
June 29 - July 2, 2003

This meeting is supported by a Research Collaboration Network grant from the National Science Foundation. This grant also provides funding for exchange of research staff among participating ChEAS research groups.  Click here for more information about research exchange. Click here for general information about the Research Collaboration Network.

· About the meeting
· Registration information
· Schedule/Agenda
· Online presentations
<updated 7/14/2003>
· Participant list and room assignments
· Instructions for attendees and presenters
· Getting to Kemp Natural Resources Station and Local Map
· Directions to other locations/field trips/restaurants
· What to bring (Lodging information)
· What to do / local resources
· Welcome Packet
  <requires Acrobat Reader>
· Travel reimbursement forms: (1) and (2)
<requires Acrobat Reader>
            Questions on travel forms? Call Diane Yoder at 814-865-7326,
            Send completed forms to: Diane Yoder, Penn State - Meteorology, 503 Walker Building, University Park, PA 16802

· Evaluation form
<requires Acrobat Reader>
· Photos <updated 7/14/2003>
· About the ChEAS research collaboration network laboratory exchange program

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About the meeting

Chequamegon Ecosystem Atmosphere Study (ChEAS) Annual Research Meeting

Dates: June 29 - July 3, 2003
Location: Kemp Natural Resources Station, Woodruff, Wisconsin

The Chequamegon Ecosystem-Atmosphere Study (ChEAS) is a multi-organizational research effort studying biosphere / atmosphere interactions within northern mixed forests in Northern Wisconsin and Michigan. The unifying goal of ChEAS is to understand the processes controlling forest-atmosphere exchange of carbon dioxide and water on the regional scale and the response of these processes to climate and land-use change. Our annual summer meeting brings together a wide range of participants from within and outside of the ChEAS network to focus on approaches to measure and explain interannual variability in NEE of northern temperate forests.

This meeting is supported by a Research Collaboration Network grant from the National Science Foundation. This grant also provides funding for exchange of research staff among participating ChEAS research groups.  Click here for more information.

What is the purpose of the annual meeting?

1) The annual meeting brings together ChEAS investigators to exchange research results and make plans for future research. To this end, the meeting includes time for research presentations and discussion time. Existing investigators are encouraged to attend, and present research progress and future plans. Investigators are encouraged to bring recent publications and to provide presentations and other materials that can be linked to the ChEAS web page ( NSF funds are available to support travel so that students and postdocs can attend in addition to project PIs. Students are encouraged to bring brief presentations of their graduate research plans, and ideas for exchanges with other groups that will enhance their research and the integration of ChEAS results.

2) The annual meeting also allows new investigators, or those interested in becoming involved with ChEAS research to become oriented in a short period of time via first-hand discussion with a large number of ChEAS PIs, students and staff. New or potential investigators, including students, are encouraged to attend. There will be introductory presentations, field site visits (to be arranged pending requests from attendees) and discussion time. Limited travel funding is available. Our workshops (2002, 2004, 2006) include more extensive training and educational activities.

This year's meeting will include discussions of

1) Integrating our work with the North American Carbon Program. ChEAS Research is a strong match for the types of regional intensive field research called for in NACP planning documents. How can we respond to this opportunity/challenge?

2) New results from our flux towers and associate measurements for the past year, focusing especially on the new science possible given the density and variety of flux measurement sites currently operating in the ChEAS domain.

3) Ongoing/new field projects including tower-biometric comparisons, a roving soil flux intercomparison project, and a demonstration regional inversion project.

Other suggestions for areas of focus are welcome.

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Registration information

Preregistration is encouraged to ensure on-site accommodations. Funding is available to cover costs of workshop attendance (transportation, lodging, and food) for a limited number of participants. Preference will be given to advanced undergraduate students, graduate students, and postdoctoral researchers from participating ChEAS labs, though support for all participants who request it will be considered. Low meeting costs have made fairly comprehensive support possible in the past.

To register, please fill out the following information and return it to Diane Yoder at The Pennsylvania State University ( as soon as possible (preferably before June 20, 2003).


Address and affiliation:


Position (e.g., graduate student, postdoc, research staff, faculty, investigator):

Are you requesting travel support?

Do you plan to present research results?

Title/topic of presentation:

Is this a graduate research plan presentation?

Are you interested in a tour of field sites?

Suggested additional discussion topics:

Are you available Sunday afternoon (29 June) or Wenesday morning (2 July)?

Planned time/date of arrival/departure:

Are you interested in sharing a ride from the airport?

Typical presentations will be allotted approximately 15 minutes to allow sufficient time for discussions. Requests for more time will be considered. Brief presentations of graduate research plans, 5-10 minutes in length, are strongly encouraged and will be organized into a single session to encourage interaction among research groups. Some activities can be accommodated Sunday afternoon or Wednesday morning, depending on need and participant travel plans.

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Meeting Schedule

This is a tentative agenda.  Times and titles can be changed.  Presentations and activities can be added or removed.  Please read it over and see where your name occurs!

Guidelines for talks:  Bring publications to share or at least references. Emphasize collaborative needs or plans, since we’ll all be together.  Recommend future studies, publications, proposals during the course of your presentation.

Grad student talks:  Be sure to briefly outline your degree research plans.  Present your ideas on lab exchanges that might benefit your project.

Facilities:  Overhead projector, Laptop PC (Windows XP Pro) with CD drive, LCD computer projector.  We welcome archiving talks in electronic format if you are willing.  Please leave a copy for us (CD-R preferred).

All presentations will be at the Kemp NRS classroom located above the boat house.  Note that none of the facilities we will be using are climate controlled – be ready to dress for weather.

Breakfast and lunch are in the dining hall.  Food for breakfast (cereals, breads, fruit, milk, juice, coffee), lunch (breads, cheese, peanut butter, salads, fruits, chips, juices) and snacks will be provided.  Group dinners will occur most nights at local restaurants. Please let us know if you have any special dietary requests. 

Depending on weather and interest, we will schedule an early morning or early evening stable boundary layer bubble release sometime during the meeting, probably at a flux tower site.  This is optional for everyone except for A.S. Denning.

Saturday, June 28

7:30                                 Dinner at Minocqua Brewery (meet at Kemp, see directions)

Sunday, June 29

3:00                                 Field trip to WLEF Tall Tower, hosted by Bruce Cook and Martha Butler.
                                                        Drive on your own. Please see directions sections on how to get to WLEF
                                        Group discussions

8:00                                 Dinner at Spang's Italian Restaurant, St. Germain (see directions section for how to get there)

Monday, 30 June

8:00                                 Breakfast at Kemp (self-service, food provided)


9-9:30                      Ken Davis, Penn State
Welcome, logistics.
                                                A brief history of the ChEAS
                                                Scope of the ChEAS – participants, projects/funds, sites, measurements.
                                                Broader context – AmeriFlux, NACP, global flux network.
                                                Goals for this meeting

9:30-10                    Ken Davis, Penn State
A summary of major results from ChEAS. 
                                                Open discussion – impromptu contributions welcome
                                                Draft ChEAS publications list.

10-10:20                  Discussion, questions, floor open for contributions related to these topics

10:20-10:30             Ron Teclaw, USDA-FS
Reminder on access to USDA-FS land, any other USFS issues

10:30-10:40                     Break 

Research results

A. Flux site results (including eddy covariance, chamber flux, biometric measurements and sap flux studies)

10:40-11  Dan Ricciuto, Penn State (G)
                                                WLEF fluxes – why is there a source of carbon?  Interannual variability?

11-11:20                  Chuixiang Yi, Penn State
                                                Estimates of horizontal advection from WLEF

11:20-11:40             Bruce Cook, University of Minnesota
                                                Willow Creek update/caterpillars discussion

11:40-12                  Discussion

12 – 1                              Lunch break

1-1:20                      Eileen Carey, University of Minnesota
                                                Sylvania flux tower site update

1:20-1:40                 Ankur Desai, Penn State (G)
Sylvania flux measurements, research plans.

1:40-2                      Leslie Kreller, University of Minnesota (G)
                                                Grad research plans

2-2:20                      Discussion

2:20-2:40                         Break

2:40-3                      Asko Noormets, University of Toledo
Bayfield flux sites update/results

3-3:20                      Jiquan Chen, University of Toledo
Bayfield flux sites results, new projects/proposals

3:20-3:40                 Brent Ewers, University of Wyoming
Sap flux and transpiration studies at ChEAS

3:40-4                      Discussion

4-4:20                              Break

B. Down-scaling and atmospheric modeling:

4:20-4:40                 Ned Patton, NCAR
LES at flux towers

4:40-5                      Joanne Skidmore, Colorado State (G)
                                                Using virtual tall tower measurements in global inversion models

5-5:20                      Aaron Wang, Colorado State (G)
                                                Grad research plans

5:20-5:40                 Weiguo Wang, Penn State (G)
                                                Progress towards regional flux derivations

5:40-dinner                    Summary of the day
                                        Open time for discussions, hikes, etc.

7:30                                 Dinner at Kemp (BBQ)

Tuesday, 1 July

8:00 a.m.                         Breakfast at Kemp (self-service, food provided)

Research results

B. Down-scaling and atmospheric modeling, continued.

8:40-9:00                 Julie Styles, Oregon State
                                                Inferring regional CO2 fluxes from surface concentration measurements

9:00-9:20                 Joe Berry, Carnegie Institution of Stanford
                                                Relating CO2 and H2O in the ABL to surface fluxes

9:20-9:40                 Ken Davis, Penn State
                                                A summary of results from Bakwin and Hurwitz, in their absence

9:40-10                    Martha Butler, Penn State (G)
                                                Spatial coherence of climate, fluxes, atmospheric CO2

10-10:20                  Discussion

10:20-10:40                     Break

10:40-11                  Scott Denning, Colorado State
                                                Reflections on modeling remote locations like
N. Wisconsin

11-11:20                  Marek Uliasz, Colorado State
                                                Mesoscale CO2 inversions and tower network design

11:20-11:40             Discussion

11:40-12                  Scott Richardson and Tasha Miles, Penn State
                                                ChEAS regional flux experiment.  The
Wisconsin cuvette.

12-1                                 Lunch break

C. Up scaling and ecosystem modeling:

1-1:20                      Yiqi Luo, University of Oklahoma
Inverse analysis of eddy flux data

1:20-1:40                 Defeng Hui, University of Oklahoma
                                                Partitioning interannual variability in NEE into climatic variability and functional change

1:40-2                      Chuixiang Yi, Penn State
                                                Interannual variability of fluxes, atmospheric co2, climate

2-2:20                      Faith Ann Heinsch, University of Montana
                                                Use of Biome-BGC with the ChEAS flux tower to address scaling issues

2:20-2:40                 Discussion

2:40-3                              Break

3-3:20                      Ian Baker, Colorado State (G)
                                                SiB at WLEF and the effect of wetlands.

3:20-3:40                 Scott Mackay, SUNY Buffalo
                                                Interannual variability of water fluxes in northern Wisconsin

3:40-4                      Sudeep Samanta (G)
                                                Evapotranspiration model uncertainty estimation using ChEAS data

4-4:20                      Discussion

4:20-4:40                         Break

4:40-dinner                    Guided discussion of future plans, action items.  Suggested topics below:
                                                        Proposal plans, calls.
                                                        Publication plans.
                                                        ChEAS RCN activities – ideas for 04 workshop, lab exchange plans, Other suggestions.
                                                        The long view:  How long is long enough?  Planning for the end of ChEAS. 
                                                        Are there other major objectives on the distant horizon?

7:30                                 Dinner at Polecat and Lace, Minocqua (see directions section for how to get there)

Wednesday, 2 July

8:00                                 Breakfast at Kemp (self-service, food provided)

8:30 - 12:00                     Discussion and planning time
                                                        Additional time for morning field visit to
WLEF Tall Tower or other sites

12:00                               Lunch at Kemp (self-service, food provided)

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Participant list

Confirmed attendees:
    Please send any corrections to Diane Yoder <>

Name Affiliation Position Email Arrival/Departure Room
Scott Denning   Colorado State Prof   Sun-Wed White Pine
Marek Uliasz  Colorado State RA     Sun-Wed White Pine
Ian Baker     Colorado State Grad     Sat-Wed White Pine
Joanne Skidmore Colorado State Grad    Sat-Wed Leatherwood
Aaron Wang     Colorado State Grad     Sat-Wed White Pine
Paul Bolstad    U. Minnesota Prof Sun maybe Cabin
Eileen Carey    U. Minnesota Prof     Sun-Wed Hemlock
Bruce Cook      U. Minnesota RA Sat-Wed Tamarack
Deborah Hudleston U. Minnesota RA Sun-Wed Hemlock
Leslie Kreller  U. Minnesota Grad Sun-Wed Hemlock
Paul's grad student U. Minnesota Grad   Sun-Wed Cabin
Leah Rathbun U. Minnesota UGrad Sun-Wed Hemlock
Faith Ann Heinsch  U. Montana RA Sat-Wed Leatherwood
Ned Patton NCAR Sci Sat-Wed Tamarack
Peter Bakwin NOAA Sci Sun-Wed  Wintergreen
Yiqi Luo Oklahoma University prof Mon-Tue Lakeview
Dafeng Hui  Oklahoma University RA Sun-Wed Lakeview
Julie Styles Oregon State Prof Sun-Wed Leatherwood
Ken Davis   Penn State Prof Sun-Wed Wintergreen
Tasha Miles Penn State RA Sat-Wed Leatherwood
Scott Richardson  Penn State RA Sat-Wed Tamarack
Chuixiang Yi Penn State RA Sun-Wed Lakeview
Martha Butler Penn State Grad Sun-Wed Hemlock
Ankur Desai      Penn State Grad Thu-Thu Tamarack
Dan Ricciuto Penn State Grad Sun-Wed Lakeview
Weiguo Wang Penn State Grad Sun-Wed Lakeview
Dave Eissenstat Penn State - Hort Prof Sun-Wed? Lakeview
Joe Berry Stanford Sci Sat-Wed White Pine
Ron Teclaw U.S. Forest Service Sci    Mon-Tue -
Jiquan Chen    U. Toledo Prof Sun-Wed Lakeview
Asko Noormets   U. Toledo Prof Sun-Wed Lakeview
Scott Mackay  U. Wisconsin Prof Sun-Wed Cabin
Sudeep Samanta  U. Wisconsin Grad Sun-Wed Cabin
Brent Ewers U. Wyoming Prof Sun-Wed Cabin

Click here for a floor plan of the Kemp Lodge.

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What to bring (Lodging information)

Limited (30 beds) dormitory-style accommodations are provided at Kemp Natural Resources Station.  Sheets and linens are provided (you can also bring your own sleeping bag).  Towels are NOT provided.  You may also want to bring shower slippers, hiking shoes, a bathing suit, a flashlight, and some bug spray.  We will have access to a large kitchen for group or individual meals.  Cooking vessels, utensils, plates and cups are all provided.  Food is available at nearby supermarkets.  High-speed internet access is provided at the Kemp lab. 

As an alternative, you may stay at nearby hotels (all are around 15 minute drive).  Click here for a local hotel directory.  We recommend the Americinn Motel in Minocqua (National reservations: 1-800-634-3444, Local: 715-356-3730) or the New Concord Inn in Minocqua (1-800-356-8888 or 715-356-1800).

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What to do / local resources

Groceries and Sundries - Trig's in Minocqua, WI is the best nearby 24-hour supermarket and liquor store.  It is located on state route 70, 1/4 mile west of the intersection of 70 and US 51.  Near Trig's are a bakery/coffee shop, Walmart and Radioshack.  Ace Hardware in Woodruff, WI (north of Kemp on state route 47) is the best local hardware store.

Restaurants - Information about the Minocqua area, including restaurants can be found at and at For local microbrews, check out the Minocqua Brewery in Minocqua off of US-51.  Another local tradition is the Friday night fish fry, available at just about any place.

Recreation - Canoes and rowboats are available for use from the Kemp boathouse.  From Kemp you can explore the many surrounding lakes.  Hiking opportunities are infinite in the Chequamegon-Nicolet National Forest.  Trails also exist on the Kemp property.  The Upper Peninsula of Michigan, about 1 hour away, has beautiful state parks (i.e., Porcupine State Park).  Fishing is also very popular up-here; a Wisconsin non-resident four-day fishing license will set you back about $15. 

Other attractions - World's largest wooden penny and the Dr. Kate museum in Woodruff, the Rhinelander Hodag at the Rhinelander Chamber of Commerce, Fred Scheer's lumberjack show in Woodruff.  Mini-golf and "wildlife" safaris are also prevalent in the Northwoods. 

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About the ChEAS research collaboration network laboratory exchange program

Funding is available for short-term (2 weeks to 2 months) exchanges of students and postdoctoral researchers between ChEAS core participant laboratories.  The objective of the exchange program is to promote cross-disciplinary research focused on understanding the processes controlling forest-atmosphere exchange of carbon dioxide and water and the response of these processes to climate and land-use change.  Candidates will be chosen based on scientific merit of proposed research project as determined by the steering committee and participation by the maximum number of participant labs will be strongly encouraged.  Funding for laboratory exchanges includes roundtrip airfare from the home institution and per diem.  The host laboratory group is expected to provide temporary housing. 

 To apply for a 2003 lab exchange send the following materials to Diane Yoder (
    1.  statement of research problem
    2.  proposed work
    3.  benefits to you, ChEAS, and host lab
    4.  expected products
    5.  letter of support from host lab

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