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GEOG5839
 INTRODUCTION TO

 DENDRO
 CHRONOLOGY
GEOG5839.01. Introduction to Dendrochronology
2012 Mar-May temperature anomaly h p://www.giss.nasa.gov/
QUESTION
Is it unusual for the world to be this warm?
Low reservoir




Source: Glen MacDonald
QUESTION
Is there enough water in the Colorado River
      to satisfy the expected need?
Source: Howard Arno
QUESTION
When were these dwellings constructed
          (and abandoned)
             and why?
GEOG5839.01. Introduction to Dendrochronology
QUESTION
How does weather and climate affect
the risk and severity of forest fires?
Source: U.S. Coast Guard, Lt. Brendan Evans
QUESTION
 How often do natural hazards like floods occur,
and what factors make them more or less likely?
“   Three li le words achingly familiar
    on the Western farmer's tongue, rule life
    in the dust bowl of the continent – if it rains.
                                         Associated Press
                                                              ”
                                             April 15, 1935
GEOG5839.01. Introduction to Dendrochronology
“   There is nothing magical about
    the last one hundred years.
                   Dr. Balaji Rajagopalan
                  University of Colorado
                                            ”
CLIMATE HISTORY OF NORTH AMERICA

                    Younger              Demise of Laurentide
                     Dryas                    Ice Sheet

    20         16     12             8                4              0

                                                                         THOUSANDS OF
                                                                         YEARS AGO




                              Final Drainage
                              of Lake Agassiz
LAST GLACIAL                                                      MODERN
  MAXIMUM                                                       OBSERVATIONS
GEOG5839.01. Introduction to Dendrochronology
Tree at Chancellorsville




Source: Andy Frasse o
Tree-ring display at elementary school




Source: Tom Swetnam
DENDROCHRONOLOGY IS

MUCH MORE
     THAN JUST
 COUNTING TREE RINGS.
“
The trees composing the forest rejoice and
lament with its successes and failures and
carry year by year something of its story in
their annual rings.”

    A. E. Douglass
    University of Arizona
Source: Baillie (1982)
GEOG5839.01. Introduction to Dendrochronology
Source: Lane Johnson
Source: Lane Johnson
GEOG5839.01. Introduction to Dendrochronology
27
St.. George and Nielsen, The Holocene, 2003
Giant sequoia 3,266 years



Source: Julie Jordan Sco
Intermountain bristlecone pine 4,844 years



Source: Tom Harlan
The Seward Oak 330 years?



Source: Ralph Sievert
Eastern white cedar (in Minnesota) 560 years



Source: Danny Margoles
GEOG5839.01. Introduction to Dendrochronology
“   Tree-ring analysis is one of the most powerful tools
    available for the study of environmental change
    and the identification of fundamental relationships
                                                                    ”
    between tree growth and climate.

                                       Ed Cook and Neil Pederson
                                 Lamont-Doherty Earth Observatory
GEOG5839.01. Introduction to Dendrochronology
INTRODUCTION TO DENDROCHRONOLOGY
GEOG5839
 MAJOR TOPICS
The science of dendrochronology uses information
encoded into the annual growth rings of trees to
address issues related to climate change, hazards,
ecology and natural history.
September 6

What are tree rings?
September 18

                How does weather affect tree growth?


Source: Paul Schulte
September 20

                 The principle of cross-dating


h p://esp.cr.usgs.gov/data/atlas/li le/
The Longest Tree-Ring Record
      In The Americas.
         8,500 Years
October 23

The history of dendrochronology
GEOG5839.01. Introduction to Dendrochronology
October 18

Sampling strategies
October 16

Dendroarcheology
November 6

                Dendroecology


Source: Whitney Crawford
November 8

                  Dendrogeomorphology


Source: Erica Bigio
GEOG5839
LABORATORY ACTIVITIES
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
Exercise

                              Tree anatomy




Source: Fritz Schweingruber
Exercise(s)

Cross-dating
Exercise

Signal processing
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839
  ABOUT ME
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839
COURSE STRUCTURE
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
GEOG5839.01. Introduction to Dendrochronology
25%   In-class discussion




Laboratory exercises   30%




                       40%   Project and final report

      Final exercise   5%
GEOG5839.01. Introduction to Dendrochronology
GEOG3839
              XT C L AS S
                      NE

Source: Fri s Schweingruber

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GEOG5839.01. Introduction to Dendrochronology