16. 100%
Woodhouse et al., 2006
Meko et al., 2001
80% Sacramento River
Upper Colorado River
Meko et al., 2007
Colorado River
Woodhouse, 2007
Middle Boulder Creek
60%
explained
variance
40%
20%
0%
Canada USA
17. 100%
Woodhouse et al., 2006
Meko et al., 2001
80% Sacramento River
Upper Colorado River
Meko et al., 2007
Colorado River
Woodhouse, 2007
Middle Boulder Creek
60% Case and MacDonald, 2003
explained
Saskatchewan River
Beriault and Sauchyn, 2006
Churchill River
variance
Bonin and Burn, 2005
Athabasca River
40%
Watson and Luckman, 2005 Gedalof et al., 2007
Bow River Columbia River
20%
0%
Canada USA
19. Janice Lough and Hal Fritts
The Southern Oscillation and tree rings: 1600 - 1961
Journal of Applied Meteorology 24, 1985
Roseanne D’Arrigo and Gordon Jacoby
A thousand year record of northwestern New
Mexico winter precipitation reconstructed from tree
rings and its relation to El Niño and the Southern
Oscillation
The Holocene 1, 1991
David Stahle and collaborators
Experimental dendroclimatic reconstruction of the
Southern Oscillation Stahle et al., 1998
Bulletin of the American Meteorological Society 79, 1998
28. DROUGHT AND SEASONALITY
How does the connection between reconstructed drought
1
and seasonal precipitation vary across North America?
29. DROUGHT AND SEASONALITY
How does the connection between reconstructed drought
1 and seasonal precipitation vary across North America?
CLIMATE MODES AND TREE RINGS
In which regions are drought reconstructions most strongly
2 connected to remote climate forcings (ENSO, PDO, AMO)?
30. The North American
Drought Atlas
Cook et al., 2007, Earth Science Reviews
47. “
...the regional summer precipitation signal is strong in
Pseudotsuga menziesii latewood-width [in southeastern
Arizona].
David Meko and Chris Baisan
Pilot study of latewood-width of conifers as an indicator of variability of summer rainfall in
the North American monsoon region
International Journal of Climatology 21, 2001
54. Julia Cole and Ed Cook
The changing relationship between ENSO variability
and moisture balance in the continental United States
Geophysical Research Letters 25, 1998
76. IMPLICATIONS
what/where OK
what/where/why NOT OK
77. IMPLICATIONS
tree ring model output
Celine Herwiejer, Richard Seager and Ed Cook
North American droughts of the mid to late nineteenth century:
a history, simulation and implication for Mediaeval drought
The Holocene 16, 2006