Dark Hollow Trail update, New York - ny038
Additional Site Information
Neil Pederson Paul Krusic Ed Cook
Reference:
Pederson, N., A.R. Bell, E.R. Cook, U. Lall, N. Devineni,
R. Seager, K. Eggleston, and K.J. Vranes. In press 2013.
Is an Epic Pluvial Masking the Water Insecurity
of the Greater New York City Region?
Journal of Climate, Early Online Release 2012
doi: http://dx.doi.org/10.1175/JCLI-D-11-00723.1
Notes:
Most of this collection of QUAL raw ring widths was made by N. Pederson
on the upper eastern ridge on Schunnemunk Mountain, near Highland Mills NY.
These data were collected for a dendroecological study of southern temperate
trees growing at or near a northern range margin. While the oldest trees
in the stand were targeted, the goal of field sampling was to collect
a range of existing tree ages within the stand. The stand in which they
are sampled primarily has shallow soil depth, although there are areas
with pockets of deep soil. The forest was dense at the time of sampling
and is old-growth forest. Because of this, detrending of these raw data
should be conducted with closed-canopy or forest interior conditions
and forest disturbance in mind.
This is a 2001 update of the original NY002 collection in the ITRDB:
http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:2966
The raw data in this collection contains values of -8888 for years where
the rings were distorted or otherwise not useful for dendroclimatology.
The latest version of ARSTAN reads these as dummy variables and can
in-fill these gaps.
COFECHA output:
Chronology file name : NY038.CRN
Measurement file name : NY038.RWL
Date checked : 27JAN13
Checked by : B. Bauer
Beginning year : 1704
Ending year : 2001
Principal investigators: N. Pederson P. Krusic E. Cook
Site name : Dark Hollow Trail update
Site location : New York
Species information : QUAL WHITE OAK
Latitude : 4135
Longitude : -07417
Elevation : 488M
Series intercorrelation: 0.553
Avg mean sensitivity : 0.216
Avg standard deviation : 0.524
Avg autocorrelation : 0.694
Number dated series : 24
Segment length tested : 50
Number problem segments: 23
Pct problem segments : 11.86
PART 5: CORRELATION OF SERIES BY SEGMENTS: Dark Hollow Trail update 10:08 Sun 27 Jan 2013 Page 5
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Correlations of 50-year dated segments, lagged 25 years
Flags: A = correlation under .3281 but highest as dated; B = correlation higher at other than dated position
Seq Series Time_span 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975
1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024
--- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1 DHTU01a 1823 2001 .49 .56 .52 .46 .51 .51 .67 .68
2 DHTU02a 1875 2001 .23B .23B .65 .75 .76
3 DHTU03a 1708 2001 .62 .68 .50 .54 .58 .51 .57 .57 .59 .59 .42 .42
4 DHTU03b 1731 2001 .52 .73 .70 .72 .72 .54 .33B .40 .54 .68 .70
5 DHTU03c 1708 1846 .52 .38 .45 .59 .64
6 DHTU04b 1826 2001 .72 .65 .47 .50 .69 .77 .76
7 DHTU05b 1760 2001 .68 .41 .39 .67 .66 .26B .39 .38B .41 .39
8 DHTU06a 1725 2001 .53 .60 .67 .66 .53 .48 .58 .54 .65 .82 .82
9 DHTU06b 1747 2001 .81 .76 .68 .72 .82 .66 .44 .58 .68 .74 .75
10 DHTU07a 1786 2001 .48 .56 .73 .81 .82 .78 .72 .73 .73
11 DHTU07b 1769 2001 .52 .56 .61 .73 .61 .54 .61 .77 .70 .70
12 DHTU08b 1711 2001 .15B .36 .60 .49 .62 .72 .55 .48 .45 .51 .55 .49
13 DHTU09a 1704 1969 .40 .52 .39 -.15B .15B .58 .56 .32A .36 .46
14 DHTU09c 1784 1946 .30B .51 .48 .39 .32A .36
15 DHTU10a 1900 2001 .37 .54 .72 .71
16 DHTU11a 1906 2001 .41 .57 .68 .68
17 DHTU12a 1854 2001 .64 .30A .31A .63 .83 .82
18 DHTU12b 1855 2001 .72 .60 .69 .75 .83 .82
19 DHTU14a 1829 2001 .78 .79 .61 .60 .68 .78 .79
20 DHTU14b 1838 2001 .82 .82 .67 .51 .65 .67 .66
21 DHTU15a 1728 2001 .51 .57 .60 .55 .32B .19B .20B .33B .42 .42 .47
22 DHTU16a 1859 2001 .55 .69 .71 .61 .64 .64
23 DHTU16b 1859 2001 .59 .62 .65 .65 .74 .73
24 DHTU17a 1755 2001 .49 .49 .21B .07B .17B .24B .29B .27B .52 .48
Av segment correlation .42 .54 .57 .49 .53 .61 .57 .47 .48 .59 .67 .67
PART 7: DESCRIPTIVE STATISTICS: Dark Hollow Trail update 10:08 Sun 27 Jan 2013 Page 8
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Corr //-------- Unfiltered --------\\ //---- Filtered -----\\
No. No. No. with Mean Max Std Auto Mean Max Std Auto AR
Seq Series Interval Years Segmt Flags Master msmt msmt dev corr sens value dev corr ()
--- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- --
1 DHTU01a 1823 2001 179 8 0 .562 .95 2.46 .439 .662 .286 2.73 .411 -.023 1
2 DHTU02a 1875 2001 127 5 2 .464 .88 2.20 .388 .727 .252 2.70 .421 -.033 1
3 DHTU03a 1708 2001 294 12 0 .524 .77 2.06 .312 .772 .207 2.71 .436 -.016 1
4 DHTU03b 1731 2001 271 11 1 .581 .88 1.81 .268 .682 .212 2.54 .386 -.011 7
5 DHTU03c 1708 1846 139 5 0 .508 .68 1.49 .285 .807 .222 2.79 .506 -.066 1
6 DHTU04b 1826 2001 176 7 0 .667 .97 2.77 .321 .504 .216 2.43 .309 -.004 2
7 DHTU05b 1760 2001 242 10 2 .484 .92 1.79 .326 .770 .179 2.51 .411 -.036 1
8 DHTU06a 1725 2001 277 11 0 .613 .69 1.96 .268 .758 .204 2.65 .394 -.022 1
9 DHTU06b 1747 2001 255 11 0 .693 .88 1.70 .263 .630 .214 2.65 .479 -.040 1
10 DHTU07a 1786 2001 216 9 0 .699 1.17 2.29 .322 .495 .211 2.61 .370 .001 1
11 DHTU07b 1769 2001 233 10 0 .626 1.21 3.70 .430 .543 .205 2.83 .481 .004 1
12 DHTU08b 1711 2001 291 12 1 .460 .97 2.25 .290 .752 .161 2.65 .456 -.011 1
13 DHTU09a 1704 1969 266 10 3 .376 -.21 1.65 2.492 .945 .242 2.68 .425 -.064 2
14 DHTU09c 1784 1946 163 6 2 .358 .95 1.79 .240 .787 .130 2.57 .461 -.016 1
15 DHTU10a 1900 2001 102 4 0 .532 .87 1.50 .226 .738 .142 2.57 .386 -.025 2
16 DHTU11a 1906 2001 96 4 0 .597 1.25 4.02 .624 .759 .233 2.61 .394 -.031 1
17 DHTU12a 1854 2001 148 6 2 .598 .80 2.80 1.894 .788 .309 2.56 .493 -.034 2
18 DHTU12b 1855 2001 147 6 0 .735 1.57 3.72 .689 .595 .321 2.57 .479 -.021 1
19 DHTU14a 1829 2001 173 7 0 .731 1.40 3.08 .435 .485 .230 2.83 .432 -.017 1
20 DHTU14b 1838 2001 164 7 0 .684 1.18 2.63 .470 .617 .231 2.59 .408 -.066 1
21 DHTU15a 1728 2001 274 11 4 .401 .77 2.42 .477 .844 .224 2.65 .451 -.033 1
22 DHTU16a 1859 2001 143 6 0 .629 1.27 2.87 .411 .378 .271 2.61 .408 -.041 1
23 DHTU16b 1859 2001 143 6 0 .662 1.15 2.80 .405 .455 .257 2.70 .428 -.005 1
24 DHTU17a 1755 2001 247 10 6 .329 .88 2.30 .277 .835 .141 2.78 .454 .034 1
--- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- --
Total or mean: 4766 194 23 .553 .91 4.02 .524 .694 .216 2.83 .429 -.023