Laboratory of Tree-Ring Research
Dendroclimatology Dendroarchaeology Dendroecology Dendro quantitative methods

University of Arizona, Tucson

Laboratory of Tree-Ring Research

2019 Dendrochronology Intensive Summer Course (DISC)

May 13 – 31, 2019

tiny map
Map of LTRR
(click to see larger image)
architect's rendering
Historical concept of LTRR
(click to see larger image)

Course Objectives

The objectives of the Dendrochronology Intensive Summer Course (DISC) include:

  • Cover basic background of dendrochronology, the study of tree rings
  • Understand features of tree rings that can be measured and used to assess/reconstruct environmental signals and/or to date events of the past
  • Practice the accurate dating of the year of formation of tree rings, using multiple techniques
  • Learn by experience aspects of fieldwork in dendrochronology, including recording field notes electronically
    • Optional: Explore the Sonoran Desert and Sky Islands of Southern Arizona while in Tucson
  • Learn by experience wood shop techniques of preparing dendrochronological specimens for analysis
  • Learn by experience the measurement of ring width and data management and sharing
  • Learn by experience the use of specialty software for analyzing tree-ring data
  • Synthesize replicated dendrochronological data into a defensible interpretation
  • Make short, formal presentations of results to a general audience
  • Specialize in a specific subdiscipline of dendrochronology:
    • Archaeology: Dating of past events of human origin, as well interpreting those events in climatological/ecological contexts
    • Climatology: Modeling modern tree-ring patterns with meteorological data and then reconstructing climatic variability of the past, as well as interpreting high- and low-frequency temporal variability in archaeological/ecological contexts
    • Ecology: Discerning non-climatic signals in tree-ring series that might be ascribable to ecological processes such as fire, insect outbreaks, hillslope positioning, and/or forest management treatments, as well as interpreting ecological events of the past in archaeological/climatological contexts
  • Network with one another, both professionally and personally




Dr. Paul Sheppard
Lab. of Tree-Ring Research
407 Tree-Ring Building
(520) 621-6474
sheppard @



Dr. Chris Guiterman
Lab. of Tree-Ring Research
Tree-Ring Building

chguiterman @



Dr. Ron Towner
Lab. of Tree-Ring Research
306 Tree-Ring Building
(520) 621-6465
rht @


Teaching Assistants
and Administration

  • Dr. Dave Meko
  • Dr. David Frank
  • Dr. Kiyomi Morino
  • Dr. Steve Leavitt
  • Dr. Ann Lynch
  • Dr. Margaret Evans
  • Ms. Amy Hudson
  • Dr. Jeff Dean
  • Dr. Don Falk
  • Dr. Peter Brewer
  • Dr. Charlotte Pearson
  • Dr. Irina Panyushkina
  • Mr. Nick Kessler
  • Dr. Ben Bellorado
  • Mr. Chris Baisan (field, shop, lab)
  • Mr. Axel Rodriguez (details)
  • Ms. Courtney Giebink (details)
  • Ms. Marcy Reiser (Ecology field consultant)
  • Ms. Marianne Hamilton (admin)
  • Dr. Martin Munro (the LTRR IT guy)
What to Bring for Tucson and for Fieldwork
Tucson: Mid May and early June will be hot during the day and mildly warm at night. Click here for local weather, then click on Tucson on the map for 5-day forecast. Note: The LTRR classroom is often kept cooler than preferred, so perhaps bring a sweater to class each day while in Tucson.
  • Academic casual attire will suffice for most activities.
  • Hat and sunglasses highly recommendable.
  • Sunscreen also a good idea for outdoor activities lasting more than an hour.
  • Personal laptop:
    • Martin (LTRR IT) has provided instructions on Wifi access while here.
    • An interactive app for crossdating by skeleton plotting will be run a couple of times. It should work on any kind of laptop, in most every browser. Before DISC, please test it out on your equipment and let us know if it doesn't work for you: Crossdating App.
  • PC vs Mac: DPL software runs for sure on PCs, and probably also on Macs after some work-arounds.
  • Don't forget a thumb drive for easy copying, storing, and sharing of data files.
Tucson after hours: Fieldwork: Northeastern Arizona will be cooler, with at least some chance of rain.
  • Long clothing (pants and shirt) required for field days
  • Hiking boots required for field days (lighter shoes ok for evening)
  • Hat, sunglasses, and sunscreen essential, maybe a bandana also
  • Cold weather clothing (jacket, gloves, balaclava, raingear), just in case
  • Small daypack
  • Personal water bottles, travel mugs
  • Personal GPS units desired (but not required)
  • Personal increment borer, if you have one
  • Gloves for coring, as preferred
  • Personal Android device, if you have one
  • Personal medications (personal medical issues?)
    • If you have a serious medical condition that requires daily medication, you must (a) inform the instructor in advance of the field trip, and (b) bring at least a 1 week supply of the medication
  • Personal first-aid kit, as desired
  • Insects are not usually a problem in high country of New Mexico and Arizona in late spring. Perhaps the occasional mosquitos at dusk, but ticks are not as bad here as in other places of the US. Long clothes help ward off insects. Still, feel free to bring repellent as desired.
Overnight accommodations in the field:
  • Fieldtrip travel and food expenses will be covered by the DISC fees.
  • Camping gear will be needed for this trip. If you have your own tent, sleeping bag, ground pad, personal utensils, etc., bring it all. If you need camping gear, inform Chris Guiterman of what you need and we'll get it from UA Outdoor Recreation.
All DISC participants shall: Also:
  • If you must arrive late or leave early (something not encouraged), please do so quietly.
  • If you have a phone (who doesn't?), please turn it off during class. If you must talk on your phone (does anyone talk on the phone anymore?) or text message someone during lecture, please do that outside of class.
  • If you must read the newspaper (anyone?), tackle the Wildcat crossword and sudoku puzzles (anyone?), study for other courses (occasionally), sleep (lots), surf the web, update Facebook, Farmville, shop Ebay, play online poker, watch DVD movies, binge watch Thrones, or do anything else not related to this course during our lecture time, please do it elsewhere, not in class. These activities are obvious (click here for an example) and are officially considered disruptive. See here for a UA student opinion about surfing the web in class.
  • Click here to see research saying people who multitask really aren't good at multitasking.
  • Racism, sexism, or violence will not be tolerated in the classroom.
  • It's acceptable—even encouraged—to collaborate with fellow students in this course. However, cheating will not be tolerated, including but not limited to:
    • Copying work of fellow students.
    • Plagiarism (click here for a definition of plagiarism).
  • Special note on plagiarism: Some definitions of plagiarism imply that all that is necessary to avoid it when copying someone else's text is to put it in quotes and then cite the original source. While technically this may be true and acceptable in some academic settings, copying someone else's text (put in quotes or otherwise) is hereby NOT acceptable in this course. This includes text from fellow students or students from past semesters, published articles or newspapers, and web sites. In short: Citing yes, copying and/or quoting no.
Special Provisions
  • In compliance with Title III of the Americans With Disabilities Act (1990), students who require special assistance will be suitably accommodated. Students must be registered with the University and a minimum notice of 5 days for such accommodations is requested.
  • Students requiring special accommodation: Please notify the professor and provide the Disability Resource Center letter within the first few days of the course.
  • Student athletes and others who need signatures periodically: Please notify the professor that you'll be needing signatures generally, and please alert the professor before a particular signing period is due so that your most up-to-date grade can be calculated.
Subject to Change
Information contained in this course syllabus, other than the grade and absence policies, may be subject to change with reasonable advance notice.

Tentative Schedule

(Note: It's not expected for readings linked here to be read
ahead of time; these are mostly resources for consulting later.)

Monday, May 13
Time Archaeology Ecology/Climatology
8:00-8:15 Arrival, coffee and bagels available
8:15-9:00 Welcome and introductions: faculty, staff, and students
9:00-10:00 Lecture: Physical and biological basis of tree rings (Steve Leavitt, confirmed, classroom)
Speer: Botanical basis of dendrochronology
Bowyer et al.: Tree growth & woody tissue
Bowyer et al.: Composition & structure of wood cells
Bowyer et al.: Softwood structure
Bowyer et al.: Hardwood structure
Vaganov et al.: Mechanistic model of tree-ring growth
Steve's powerpoint slides
10:00-10:30 Break
10:30-11:30 The Lyons and Campbell Ranch: A brief history (Ron Towner, Conference room) Ongoing Dendrochronology on the Navajo Nation (Chris Guiterman, Classroom)
Guiterman and Margolis: Vulnerabilities of Navajo Nation forests to climate change
Savage and Swetnam: Fire decline following sheep pasturing in Navajo ponderosa pine
Whitehair et al.: Fire regime in a cultural landscape of Navajo Nation
11:30-1:00 Break for lunch (ENR2 and Highland Market are nearby, see blue circles in map above, or click here)
1:00-2:00 Lab: Crossdating by Skeleton Plotting using the applet (Paul Sheppard, classroom, confirmed)
Sheppard: On the crossdating applet teaching tool
2:00-3:00 Tour of Bannister Tree-Ring Building (Paul Sheppard)
3:00-4:00 Equipment, food, and logistical planning for the field (Ron, conference room) Equipment, food, and logistical planning for the field (Chris & Paul, classroom)
4:00-5:00 Practicum: Sampling dead wood (Archaeo staff) Lecture: Open Data Kit (ODK) theory & basics (Chris Guiterman, classroom)
ODK instructions for DISC
Brewer-Guiterman: ODK fieldwork

Tuesday, May 14
Time Archaeology Ecology/Climatology
9:00-10:00 Lecture: History of Dendrochronology in the Southwest (Ron Towner, Classroom)
8:00 AM Departure

Fieldtrip: Drive to Navajo Nation, northeastern Arizona (Ecology staff: Paul, Chris, Don, Chris)

Set up camp at Sawmill
10:15-11:30 Lecture: Principles of Dendro: Ecological amplitude and limiting factors (Ron Towner, Classroom)
11:30-1:00 Break for lunch
1:00-4:30 Lab: Crossdating Zuni samples (Classroom)
5:00-6:30   Dinner at camp
dusk   Campfire chat: Principles: site & tree selection (all)
Grissino-Mayer: Species used in dendrochronology

Wednesday, May 15
Time Archaeology Ecology/Climatology
9:00-10:15 Lecture: Principles: Site and tree selection (Ron Towner, Classroom) Fieldwork: Navajo Nation, northeastern Arizona

Peeled trees, fire scars, and old trees at Sawmill
10:30-12:00 Food shopping
12:00-5:00 Fieldtrip: Drive to Cliff, New Mexico (Archaeology staff: Ron, David, Pamela)
5:00-6:30 Dinner in camp Dinner in camp
dusk   Field demo: Cleaning gear (all)
Campfire chat: Principles: limiting factors & ecological amplitude (all)
Fritts et al.: Tree rings along a vegetational gradient

Thursday, May 16
Time Archaeology Ecology/Climatology
all day Fieldwork: Lyons and Campbell Ranch
Fieldwork: Navajo Nation, northeastern Arizona

Peel trees, fire scars, and old trees at KCS

More trees at Our Lady of the Lake
5:00-6:30 Dinner in camp Dinner in camp
dusk   Field demo: Sharpening borers (all)
Campfire chat: Principles: uniformitarianism (but, age effects & divergence) (Paul Sheppard)
Speer: Uniformitarianism
Szeicz & MacDonald: Age-dependent dendroclimate modeling
D'Arrigo et al.: Divergence

Friday, May 17
Time Archaeology Ecology/Climatology
all day Fieldwork: Lyons and Campbell Ranch
Fieldwork: Navajo Nation, northeastern Arizona (snow this morning!)
Hubbell Trading Post

Nazlini update, Douglas-fir
Canyon de Chelly

(Whitehouse Ruin and
Spider Rock)
5:00-6:30 Dinner in camp Dinner in Chinle
dusk   Campfire chat: Principles: linear aggregate model (Paul Sheppard)
Cook: Linear aggregate model

Saturday, May 18
Time Archaeology Ecology/Climatology
8:00 - 4:00 Fieldtrip: Return to Tucson Field demo: unsticking borers from trees (Paul Sheppard)
Phipps: How-to manual for processing increment cores (pages 18-20 cover unsticking borers from trees)
Yamaguchi: Retrieving a stuck borer
Loader: The "Decorum" borer unsticker

Fieldtrip: Return to Tucson
4:00 - 5:00 Unpack vehicles Unpack vehicles

Sunday, May 19
Time Archaeology Ecology/Climatology
daytime off off
evening Optional: Picnic dinner and open-air concert of the Tucson Pops Orchestra, ride share to Reid Park, bring a chair

Monday, May 20
Time Archaeology Ecology/Climatology
8:30-9:30 Lecture: Cambium peeled trees in the Zuni Mountains (Ron Towner)
Towner & Galassini: Peeled trees of the Zuni Mountains
9:45-10:45 Lecture: Tree-ring characteristics that can be measured: TRW, EW, LW, false banding, density, resin ducts (Kiyomi Morino, confirmed, Classroom)
new readings?
11:00-12:00 Lecture: Basics of dendroecology (Don Falk, confirmed, Classroom)
Slides for this lecture
12:00-1:00 Break for lunch
1:00-3:00 Lab: Mounting increment cores (Paul and Chris, classroom)
Phipps: How-to manual for processing increment cores (pages 27-31 cover mounting cores)
3:00-4:30 Archaeological sample preparation Organizing digital field data (Chris Guiterman, Classroom)
4:30-5:00 A couple student presentations: background and research (bring a powerpoint with a few slides, e.g., a map, a couple field shots, research objectives), and expect to fill ~5-10 minutes of presentation and Q&A time. Everyone participates. Today: Steve and Axel.

Tuesday, May 21
Time Archaeology Ecology/Climatology
8:30-9:30 Lecture: Recognizing insect signals in wood and ring-width series (Ann Lynch, classroom)
Swetnam et al.: Using dendrochronology to measure defoliated trees
Lynch: What tree-ring reconstruction says about defoliator outbreaks
O'Connor et al.: Post-fire dynamics affect spruce beetle outbreaks
9:45-10:45 Lecture: Climate change in the Four Corners and adjacent regions: Implication for past human occupation on the southern Colorado Plateau (Jeff Dean, classroom)
Dean & Funkhouser: Dendroclimate of the Southern Colorado Plateau
Jeff's lecture slides
11:00-12:00 History of SW Dendroarchaeology (Ron Towner, Conference room) Lecture: Dendrodemography (Margaret Evans, confirmed, Classroom)
Macalady & Bugmann: Predicting tree mortality
Iniguez et al.: Historical forest age structure
Biondi: Tree-rings vs forest inventories, Gus Pearson Forest
Lloret: Tree Resilience
Margaret's slides for this lecture
12:00-1:00 Break for lunch
1:00-4:30 Wood shop: safety, mounting cross-sections, sanding samples (Chris Guiterman)
Minor & Arizpe: Trimming down cross-sections, sanding cores

Sanding paper
Tree-ring sanding cartoon
4:30-5:00 A couple student presentations: background and research (bring a powerpoint with a few slides, e.g., a map, a couple field shots, research objectives), and expect to fill ~5-10 minutes of presentation and Q&A time. Everyone participates. Today: Kyoko and John.
evening Ecology: Working dinner at Paul's house: Planning for subgroups for Ecology projects. All Ecology students and instructors.

Wednesday, May 22
Time Archaeology Ecology/Climatology
8:30-9:30 XXX
9:45-10:45 Lecture: Marking rings, dot system, filling in data sheets (Paul Sheppard, classroom)
Ring markings
Crossdating by skeleton plotting
11:00-12:00 Lecture: Mediterranean dendroarchaeology (Charlotte Pearson, confirmed, Conference room)
readings to link?
Crossdating with character lists (Paul Sheppard, Classroom)
Yamaguchi: Character list technique
Speer: List method
Representative data form for character list technique
DPL, a DOS program that includes BAR, barplotting

Try BAR on the 1965 Nazlini chronology, for example

Note: To print DPL outputs:
  1. Open in Word
  2. Select all
  3. Switch to landscape orientation
  4. Set all margins to 0.5"
  5. Switch font to Courier, size 8
  6. Add highlighting, text boxes, as desired
  7. Print in color, double-sided, long edge
  8. Mic drop
12:00-1:00 Break for lunch
1:00-4:30 Sample preparation and begin crossdating (Classroom) Lab: Continue crossdating samples
4:30-5:00 A couple student presentations: background and research (bring a powerpoint with a few slides, e.g., a map, a couple field shots, research objectives), and expect to fill ~5-10 minutes of presentation and Q&A time. Everyone participates. Today: Courtney and Monica.

Thursday, May 23
Time Archaeology Ecology/Climatology
8:30-9:30 Lecture: Introduction to measuring ring width (paul Sheppard, classroom)
Then: Starting a measuring session (Chris Guiterman, Lab room 314)
Measuring rings
Paul's paper sample
9:45-10:45 Lecture: Dendroarchaeology and human behavior (Jeff Dean)
Dean: Behavioral error in archaeological tree-ring dating
Measuring and verifying (Paul Sheppard, Classroom)
Grissino-Mayer: Measurement checking
Verify for Windows
Paul vs Paul verification output
Paul's rwl measurement file of the photocopied "core"
11:00-12:00 Lecture: Dating Kiva Murals of SE Utah (Ben Bellorado, confirmed, Conference room)
readings to link?
Lecture: Data formats (Paul Sheppard, Classroom)
TRiDaS Website
Jansma et al.: TRiDaS
12:00-1:00 Break for lunch
1:00-4:30 Sample preparation and crossdating
Sample measuring
4:30-5:00 A couple student presentations: background and research (bring a powerpoint with a few slides, e.g., a map, a couple field shots, research objectives), and expect to fill ~5-10 minutes of presentation and Q&A time. Everyone participates. Today: Liz and Dimitris.
Also, click here to order an LTRR t-shirt for yourself.

Friday, May 24
Time Archaeology Ecology/Climatology
8:30-9:30 Lecture: Time-series properties (interannual variability & autocorrelation) (Paul Sheppard, Classroom)
Douglass: Mean sensitivity
Strackee & Jansma: Mean sensitivity
Bunn: Intro to dplR
Biondi & Qeadan: Gini coefficient
Bunn et al.: Mean sensitivity
Spreadsheet of interannual variability measures
Ed Wright demo of indices of interannual variability

Yamaguchi: Crosscorrelation of tree-ring series
Spreadsheet of cross-correlations
9:45-10:45 Dateless archaeology (Ron Towner, Conference room) COFECHA (Paul Sheppard, classroom)
The program executable
A text file of info
Holmes: Computer quality control
Grissino-Mayer: COFECHA manual
Another COFECHA manual

COFECHA Example 1
Sunset Crater data, with issues
Output, with issues

COFECHA Example 2
Sunset Crater data, cleaned up
Output, cleaned up

COFECHA Example 3
Sunset Crater data, undated
Output, undated #1
Output, undated #2
11:00-12:00 Demonstration: Tellervo (Peter Brewer, confirmed, Room 414?)
Brewer: Tellervo
Tellervo download & access instructions
12:00-1:00 Break for lunch
1:00-4:30 Measure and COFECHA
4:30-5:00 A couple student presentations: background and research (bring a powerpoint with a few slides, e.g., a map, a couple field shots, research objectives), and expect to fill ~5-10 minutes of presentation and Q&A time. Everyone participates. Today: Vinicius and Mañuel.
Also, click here to see an 8 x 12 version of the Spider Rock group photo, or here for a 5 x 7 version. Let Paul know of any name errors and/or style issues.
If you'd like a board print of either one of these to take home, board prints can be done at Walgreen's, and for 60% off if we order all at the same time. The 8x10 print would cost $24 plus tax, and the 5x7 print would cost $15 plus tax.
Happy HourA little singing and recording (classroom). Click here for the youtube video (final take) from this recording session. Best with headphones, volume slightly up.

Saturday, May 25
Time Archaeology Ecology/Climatology
Optional: Morning outing to Arizona-Sonora Desert Museum. The ASDM is a world-renowned living museum of the Sonoran Desert, famously the "finest desert in the world." A must-see while in Tucson. We have a group entrance rate of $8.00 per person, but we must commit to a number of people in our group ahead of time. Please email Paul (email address above) your desire to do this half-day trip or not.
midday Lunch: El Guero Canelo, a Tucson tradition
afternoon Lab: Group projects, as needed/desired
evening Dinner: Pinnacle Peak, another Tucson tradition

Sunday, May 26
Time Archaeology Ecology/Climatology
Optional: Drive tour up the Catalina Mountains to Mt. Lemmon, to experience our nearby Sky Island
Don's Sky Island overview
Depending on level of interest, this activity will start with breakfast at Bobo's, then depart by ~7:30 AM and return by early afternoon. Bring snacks and water.
Check out our lapse rate measurements from 2017.
Lunch: Le Buzz
Otherwise: Off, laundry, rest, etc.
evening Optional: Picnic dinner and open-air concert of the Tucson Pops Orchestra, carpooling (?) to Reid Park, bring a chair

Monday, May 27
Time Archaeology Ecology/Climatology
morning 9:00-10:15: Lecture: Interpreting dates and behavior case study #1 (who?, conference room)
Lightfoot 1992: Dendro dating of Duckfoot, Southwestern Colorado

10:30-11:45: Lecture: Slash and trash: lessons from a 20th century logging camp (Ron Towner, conference room)

8:30-9:30: Lecture: Introduction to quantitative dendro analysis using R (Amy Hudson, classroom, confirmed)
R project website
R studio website
dplR website
Bunn: dplR
Bunn: Intro to dplR
Amy's dplR script

9:45-10:45: Lecture: ARSTAN (DPL version): Detrending and robust mean (Paul Sheppard)
Fritts et al.: Modified negative exponential
Excel spreadsheet not filled in
Excel spreadsheet filled in
Paul's first modified negative exponential

Cook-Peters: Cubic smoothing spline
Spreadsheet spline demo

Cook: Robust Mean
Spreadsheet robust mean

ARSTAN executable
ARSTAN text file documentation
Cook-Holmes: 1986 ARSTAN Users Manual
1999 ARSTAN Users Manual
ARSTAN output

YUX executable (put data into columns)
YUX text file documentation

Prototype presentation of a final chronology

11:00-12:00: Lecture: Basics of dendroclimatology (David Frank, confirmed)
Touchan et al.: Jemez NM precipitation reconstruction

12:00-1:00 Break for lunch
1:00-4:30 Lab: Group projects (all)
4:30-5:00 Student presentation: Today: Monica
Monica's CooRecorder notes

Tuesday, May 28
Time Archaeology Ecology/Climatology
morning 9:30-10:45: Montezuma Castle Dendroarchaeology (Nick Kessler, conference room)

11:00-12:00: Navajo dendroarchaeology (Ron Towner, conference room)

8:30-9:30: Lecture: Low-severity fire regimes, FHAES (Don Falk and Peter Brewer, classroom)
Falk et al.: Multi-scale controls of historical fire regimes
Fire History Analysis and Exploration System
Help for FHAES
Local PDSI for SEA

9:45-10:45: Demo: burnr program (Chris Guiterman, Classroom)
burnr website
burnr demo
Malevich et al.: burnr

11:00-12:00: Lecture: BAI calculations and interpretation (Paul Sheppard, Classroom)
LeBlanc: On basal area increment
Centennial Forest spreadsheet
Biondi: BAI at the Gus Pearson
Paul's SMC spreadsheet

12:00-1:00 Break for lunch
1:00-4:30 Lab: Group projects (all)
4:30-5:00 Student presentation: Today: Asia

Wednesday, May 29
Time Archaeology Ecology/Climatology
morning 9:00-10:15: Maritime Dendroarchaeology (Pearce Paul Creasman, Conference room)

10:30-11:45: Dendroarchaeology in central Asia (Irina Panyushkina, Conference room)

8:30-9:30: Lecture: Identifying climate signal (Dave Meko, Classroom, confirmed)
Meko et al.: SEASCORR: seasonal climate signals in tree rings
PRISM Climate Data
PRISM precipitation data for Navajo
PRISM temperature data for Navajo

9:45-10:45: Lecture: EXTRAP, applications in geomorphology and ecology (Paul Sheppard, Calssroom)
Sheppard & White: An earthquake example
Sheppard et al.: Sunset Crater tornado example

11:00-12:00 Defoliator?

12:00-1:00 Break for lunch
1:00-5:00 Lab: Group projects (all)

Thursday, May 30
Time Archaeology Ecology/Climatology
morning 9:00-10:30: Interpreting Dates (who?, Conference room)
Street ref?

10:45-12:00: Interpreting Dates (who?, Conference room)
Snead ref?

8:30-9:30: Lecture: Essential resources for dendrochronology (Paul Sheppard)

The International Tree-Ring Data Bank
Grissino-Mayer & Fritts: ITRDB
DendroBox, a quick way to access ITRDB data sets
The International Multiproxy Paleofire Database
Online Biblio of Dendrochronology

Fundamentals of Tree-Ring Research (Click here for a book review of Fundamentals)
Tree Rings and Climate
An Introduction to Tree-Ring Dating
USGS: Collecting, Preparing, Crossdating, and Measuring Tree Increment Cores

Tree-Ring Research, with access to high quality pdfs of past TRR papers

Classic NGM issues:
National Geographic (March 1958): Bristlecone Pine, Oldest Living Thing
National Geographic (December 1929): Bridging the Gap

Professional society:
The Tree-Ring Society

Social Media:
The ITRDB Forum (email)
Facebook: Tree Rings and Dendro Things

9:45-10:45: Grand summary (Paul Sheppard, Classroom)
Sheppard: The many steps of dendro

11:00-12:00: open

12:00-1:00 Break for lunch
1:00-5:00 Lab: Group projects (all)

Friday, May 31
Time Archaeology Ecology/Climatology
Morning Preparation of group presentations
12:00-1:00 Break for lunch
1:00-2:00 Final preparation of group presentations
2:00-4:00 Group presentations, all of LTRR invited
4:00-5:00 Presentation of certificates (David Frank), acknowledgments & concluding remarks (any and all instructors who wish to comment)
A video postcard of DISC Ecology 2019. Four minutes long, best with headphones.
Happy Hour
Course evaluation, completion of 2019 DISC
6:30-9:00 Celebration gathering: 6:30 PM at Borderlands Brewing Company, 119 E. Toole Ave. The Blacktop Grill food truck will be there and serving.

Laboratory of Tree-Ring Research, University of Arizona
Tucson, Arizona 85721 USA
Comments to Paul Sheppard: sheppard @