FRONTIERS IN DENDROCHRONOLOGYPhotograph: Nestor Jarquin
755 m 3/s847 m 3/s809 m 3/s770 m 3/s823 m 3/s787 m 3/s901 m 3/s
empirical comparisons
Ring-width  index
THEDIVERGENCE  PROBLEM
“   [L]inear empirical–statistical analyses alone cannot be used    to prove a physical or biological mechanism for variab...
Vaganov et al., In Dendroclimatology, 2010
Vaganov-Shashkin model of tree-ring formationGr(t) = g E (t) • min[g T (t), g W (t)]Total         Solar radiation     Temp...
Upper Sapawe Region Northwestern Ontario
Tracking changes in limiting factor through the growing season
Tracking changes in limiting factor through the growing season
Tracking changes in limiting factor through the growing season
Tracking changes in limiting factor through the growing season
Photograph: Conrad Bakker
Observed and simulated tree ring-width in southern RussiaSource: Evans et al., Journal of Geophysical Research, 2006
Anchukaitis et al., Geophysical Research Le ers, 2007
empirical comparisons
“   This [modeling approach] would represent a significant    step toward validating and improving statistically based    b...
There are relatively few long high-resolution    terrestrial proxies from the tropics
nispiro (Sapotaceae)                                  Monteverde, Costa Rica                                eastern white ...
Photograph: Abdalla Mohamed Abdi
“[Establish] a strategy to develop chronometric estimates intropical trees lacking demonstrably annual ring structure, usi...
O 16       O 18
Stable isotopes of oxygen                            O 18                            0.2%                                 ...
δO18       in precipitation                                             Li le O18                                         ...
Monteverde Cloud Forest, Costa RicaSource: Kevin Anchukaitis
Source: Kevin Anchukaitis
Photograph: Denise Jesudason      Cloud forest Monteverde, Costa Rica
-5‰                       -1 ‰              δO“more negative” 18   “more positive” δO 18      = “light”           = “heavy...
PINE NEEDLEleaf stomata
PINE NEEDLEleaf stomata
LEAF CROSS-SECTIONabundant water
CO2              CO2      LEAF CROSS-SECTION      abundant water
CO2               CO2 H2O          H2O       LEAF CROSS-SECTION       abundant water
LEAF CROSS-SECTIONwater shortage
CO2                CO2     CO2CO2         CO2                CO2   CO2                      CO2  H2O                    H2...
Source: Kevin Anchukaitis
Photograph: Kevin Anchukaitis
nispiro (Sapotaceae)                                  Monteverde, Costa Rica                                eastern white ...
Photograph: Todd Vanderlin
Source: Anchukaitis et al., Journal of Geophysical Research, 2008
Source: Anchukaitis et al., Journal of Geophysical Research, 2008
3 TREES       16 YEARS1200δ018   MEASUREMENTS
FINAL EXAM  May 10 @ 4PM   105 Blegen
Photograph: Nevada Tourism Media Relations
Reconstructed annual flow of the Colorado River at Lees Ferry[Meko and Woodhouse, 2010]
Fire-scar chronologies in the Gila WIlderness, New Mexico[Swetnam and Brown, 2010]
INTRODUCTION TO DENDROCHRONOLOGY
52
Photograph: Joe Mabel
Photograph: daveynin
Tree-ring display at elementary school                                    Photograph:Tom Swetnam
Ed Cook Lamont-Doherty Earth Observatory
“Tree-ring analysis is one of the most powerful tools available forthe study of environmental change and the identification...
DENDROCHRONOLOGY         IS    MUCH MORE      THAN JUSTCOUNTING TREE RINGS.
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
GEOG3839.23, Frontiers in dendrochronology
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GEOG3839.23, Frontiers in dendrochronology

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GEOG3839.23, Frontiers in dendrochronology

  1. 1. FRONTIERS IN DENDROCHRONOLOGYPhotograph: Nestor Jarquin
  2. 2. 755 m 3/s847 m 3/s809 m 3/s770 m 3/s823 m 3/s787 m 3/s901 m 3/s
  3. 3. empirical comparisons
  4. 4. Ring-width index
  5. 5. THEDIVERGENCE PROBLEM
  6. 6. “ [L]inear empirical–statistical analyses alone cannot be used to prove a physical or biological mechanism for variability or ” change in the climate-tree growth relationship. Anchukaitis et al., Geophysical Research Le ers, 2007
  7. 7. Vaganov et al., In Dendroclimatology, 2010
  8. 8. Vaganov-Shashkin model of tree-ring formationGr(t) = g E (t) • min[g T (t), g W (t)]Total Solar radiation Temperature Water balancegrowth rate growth rate growth rate growth rate
  9. 9. Upper Sapawe Region Northwestern Ontario
  10. 10. Tracking changes in limiting factor through the growing season
  11. 11. Tracking changes in limiting factor through the growing season
  12. 12. Tracking changes in limiting factor through the growing season
  13. 13. Tracking changes in limiting factor through the growing season
  14. 14. Photograph: Conrad Bakker
  15. 15. Observed and simulated tree ring-width in southern RussiaSource: Evans et al., Journal of Geophysical Research, 2006
  16. 16. Anchukaitis et al., Geophysical Research Le ers, 2007
  17. 17. empirical comparisons
  18. 18. “ This [modeling approach] would represent a significant step toward validating and improving statistically based but ultimately subjective data standardization techniques ” and identifying decadal climate variability reliably. Evans et al., Journal of Geophysical Research, 2006
  19. 19. There are relatively few long high-resolution terrestrial proxies from the tropics
  20. 20. nispiro (Sapotaceae) Monteverde, Costa Rica eastern white pine (Pinaceae) Deep Gap, North CarolinaPhotograph: Kevin Anchukaitis
  21. 21. Photograph: Abdalla Mohamed Abdi
  22. 22. “[Establish] a strategy to develop chronometric estimates intropical trees lacking demonstrably annual ring structure, using ”high resolution stable isotopic measurements in tropical woods. Evans and Schrag 2004, GCA, 68, 16
  23. 23. O 16 O 18
  24. 24. Stable isotopes of oxygen O 18 0.2% O 17 0.04% O 16 99.76%
  25. 25. δO18 in precipitation Li le O18 Lots of O18Source: Bowen and Wilkinson, Geology, 2002
  26. 26. Monteverde Cloud Forest, Costa RicaSource: Kevin Anchukaitis
  27. 27. Source: Kevin Anchukaitis
  28. 28. Photograph: Denise Jesudason Cloud forest Monteverde, Costa Rica
  29. 29. -5‰ -1 ‰ δO“more negative” 18 “more positive” δO 18 = “light” = “heavy” = “depleted” = “enriched”
  30. 30. PINE NEEDLEleaf stomata
  31. 31. PINE NEEDLEleaf stomata
  32. 32. LEAF CROSS-SECTIONabundant water
  33. 33. CO2 CO2 LEAF CROSS-SECTION abundant water
  34. 34. CO2 CO2 H2O H2O LEAF CROSS-SECTION abundant water
  35. 35. LEAF CROSS-SECTIONwater shortage
  36. 36. CO2 CO2 CO2CO2 CO2 CO2 CO2 CO2 H2O H2OH2O H2O H2O LEAF CROSS-SECTION water shortage
  37. 37. Source: Kevin Anchukaitis
  38. 38. Photograph: Kevin Anchukaitis
  39. 39. nispiro (Sapotaceae) Monteverde, Costa Rica eastern white pine (Pinaceae) Deep Gap, North CarolinaPhotograph: Kevin Anchukaitis
  40. 40. Photograph: Todd Vanderlin
  41. 41. Source: Anchukaitis et al., Journal of Geophysical Research, 2008
  42. 42. Source: Anchukaitis et al., Journal of Geophysical Research, 2008
  43. 43. 3 TREES 16 YEARS1200δ018 MEASUREMENTS
  44. 44. FINAL EXAM May 10 @ 4PM 105 Blegen
  45. 45. Photograph: Nevada Tourism Media Relations
  46. 46. Reconstructed annual flow of the Colorado River at Lees Ferry[Meko and Woodhouse, 2010]
  47. 47. Fire-scar chronologies in the Gila WIlderness, New Mexico[Swetnam and Brown, 2010]
  48. 48. INTRODUCTION TO DENDROCHRONOLOGY
  49. 49. 52
  50. 50. Photograph: Joe Mabel
  51. 51. Photograph: daveynin
  52. 52. Tree-ring display at elementary school Photograph:Tom Swetnam
  53. 53. Ed Cook Lamont-Doherty Earth Observatory
  54. 54. “Tree-ring analysis is one of the most powerful tools available forthe study of environmental change and the identification of ”fundamental relationships between tree growth and climate. Cook and Pederson, 2010
  55. 55. DENDROCHRONOLOGY IS MUCH MORE THAN JUSTCOUNTING TREE RINGS.

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