Deer Creek Pass - WA087 Additional Site Information Note: Materials referred to below (cores, photographs, notes, etc.) are archived at the Tree-Ring Laboratory, University of Washington, Seattle WA 98195. SITE NAME: Deer Creek Pass, DCP (Called Segerson Pass Road, SPR, on reconnaissance). COLLECTION DATE: 13-14 July 1987 LATITUDE: 48 deg 19.5 min LONGITUDE: 121 deg 42.5 min LEGAL LOCATION: WA, T33N, R8E, SE 1/4 of S24, and T33N, R8E, NE 1/4 of S25, and T33N, R9E, SW 1/4 of S19, and T33N, R9E, NW 1/4 of S30; Mt. Baker- Snoqualmie National Forest, Darrington Ranger District. APPROACH: From I-5, take Washington 530 E to Darrington. Backtrack ca. 5 miles to the crossroads in Fortson (gas station on SE) and turn N. About 0.5 miles after road turns to W, take a right (N) on FS Road 18. At about 11.4 miles, road crosses a creek. On the slope above, trees 1-11 are S of the creek and 12-25 are N of it. ASPECT: 257 degrees SLOPE: 67 percent ELEVATION: 3100-3800 feet 945-1160 meters QUADRANGLE: Fortson, WA 7.5 minute PHOTOS: For site, recon tree and for each sampled tree #1-#25, archived at University of Washington. STAND NOTES: Releve: 40% VAAL and VAME (about equal proportions), 10% BLSP, 5% COCA, 5% MEFE. Also CLUN, VEVI, COME, TIUN, GASH, CHME, SOSI. BLSP and other moist spp. restricted to area of trees 1-11; rest of site VAME-VAAL normative (see tree photos). Therefore, association is ABAM/VAME. Regeneration ABAM, TSHE, THPL (ABAM Zone). Overstory 80-160cm PSME, 60-110cm TSHE, 0-40cm ABAM, 40-100cm THPL, rare 40-80cm TSME. Light CWD, mostly <50cm, DC 3-4, PSME and THPL. Substrate not visible. Snags about 10% of stems, mostly 10-30cm ABAM. No evidence of disturbance, except for edge effects, avoided during sampling. Jan Henderson reports stand age as ca. 800 years. MAP OF SITE: See field form and enlarged topo map, archived at University of Washington. TREE DATA For tree form (all are erect old growth), slope position (almost all are midslope) and remarks on the trees, see the field forms. Nearest neighbor: Distance in meters, species, DBH in cm Core azimuth: Measured as clock time to the nearest hour, with upslope taken as 12:00. Tree DBH Height Nearest Core Aspect Slope Tag Neighbor Pos. No. 1 136 53 0.7 TSHE 71 A3 B9 2 101 37 1.8 THPL 58 A3 B9 328 75 3 154 48 0.5 TSHE A10 B3 4 107 43 0.6 ABAM 40 A2 B10 10 70 5 128 38 4.3 TSHE 78 A2 B7 6 133 49 1.3 THPL 80 A2 B10 7 100 34 0.9 TSHE 93 A3 B8 335 72 8 127 36 1.3 ABAM 32 A3 B11 9 94 34 5.3 TSHE 97 A10 B2 340 65 10 106 38 2.1 TSHE 109 A10 B2 277 58 11 164 50 4.5 TSHE 104 A10 B2 314 57 12 126 47 8.3 TSHE 70 A10 B2 315 74 13 93 45 1.0 THPL 92 A3 B9 248 67 14 124 35 2.7 TSHE 91 A2 B10 296 66 15 154 37 3.8 TSHE 79 A3 295 69 16 136 38 0.6 ABAM 35 (ROTTEN) 271 72 17 98 36 1.2 TSHE 73 A3 B9 260 68 18 146 35 1.7 THPL 64 A2 B10 248 65 19 123 28 1.3 THPL 39 A10 B2 236 70 20 33 3.2 TSHE 72 A3 B9 220 58 21 96 24 3.9 TSHE 66 A3 B9 255 65 22 101 25 2.9 TSME 73 A3 B9 236 68 23 97 30 3.3 THPL 54 A11 B1 222 58 24 79 32 2.9 TSHE 80 A10 B3 211 68 25 88 29 5.9 THPL 59 A2 B9 226 75 Averages: 117 37 5.4 TSHE 66 A3 B9 257 67 Blank entries represent unknown data. CHRONOLOGY DEVELOPMENT The chronologies were developed using Program CRONOL as distributed by the ITRDB ca. 1994. They were standardized using program defaults, which involve use of a cubic spline that removes 50% of variance at 128 years. Persons desiring to use this data for purposes other than screening are advised to use the crossdated ring width measurements, also available from the ITRDB, and to develop chronologies suited to their particular needs. These data were originally collected for a study of air pollution impacts on tree growth in the Puget Sound region and were analysed on a core-by-core basis using a process that did not entail chronology development. Details are available in the following source: Brubaker, L.B.; Vega-Gonzalez, S.; Ford, E.D.; Ribic, C.A.; Earle, C.J.; and Segura, S. 1992. Old-growth Douglas-fir in western Washington. P. 333-364 in Olson, R.K.; Binkley, D.; and Bohm, M., eds., "The response of western forests to air pollution." Springer-Verlag, New York. NOMENCLATURE The four-letter codes used above identify common species found in montane forests of the Pacific Northwestas, follows: ABAM - Abies amabilis ACCI - Acer circinatum ACTR - Achlys triphylla ATFE - Athyrium filix-femina BENE - Berberis nervosa BLSP - Blechnum spicant CHME - Chimaphila menziesii CHUM - Chimaphila umbellata CLUN - Clintonia uniflora COCA - Cornus canadensis COME - Corallorhiza mertensiana GAOV - Gaultheria ovatifolia GASH - Gaultheria shallon GOOB - Goodyera oblongifolia GYDR - Gymnocarpium dryopteris LIBO - Linnaea borealis LICA - Listera caurina MEFE - Menziesia ferruginea OPHO - Oplopanax horridum POMU - Polystichum munitum PSME - Pseudotsuga menziesii PYAS - Pyrola asarifolia SMST - Smilacena stellata TABR - Taxus brevifolia THPL - Thuja plicata TIUN - Tiarella unifoliata TROV - Trillium ovatum TSHE - Tsuga heterophylla VAAL - Vaccinium alaskaense VAME - Vaccinium membranaceum VAPA - Vaccinium parvifolium VISE - Viola sempervirens A recommended reference on vegetation in these forests is: Franklin, Jerry F. and C.T. Dyrness. 1988. "Natural vegetation of Oregon and Washington." Oregon State University Press, Corvallis. COFECHA output: Chronology file name : WA087.CRN Measurement file name : WA087.RWL Date checked : 02SEP96 Technician's name : MARIETTE SEKLECKI Supervisor's name : HENRI D. GRISSINO-MAYER Beginning year : 1502 Ending year : 1987 Principal investigators: C.J. EARLE, L.B. BRUBAKER, G. SEGURA Site name : DEER CREEK PASS Site location : WASHINGTON, USA Species information : PSME DOUGLAS-FIR Latitude : 4820N Longitude : 12143W Elevation : 1052 M Series intercorrelation: 0.568 Avg mean sensitivity : 0.207 Avg standard deviation : 0.165 Avg autocorrelation : 0.736 Number dated series : 48 Segment length tested : 50 Number problem segments: 52 Pct problem segments : 7.65 Are there obvious misdated series? NO Number possible misdated series : N/A Percent misdated series : 0.00 Do they affect chronology quality? N/A Recommend withhold from ITRDB? N/A Comments: #38 DCP20A 1850-1986 IS POSSIBLY MISDATED ALL FLAGS = LOW CORRELATIONS WITH MASTER EXCELLENT DATA SET PART 5: CORRELATION OF SERIES BY SEGMENTS: 16:05 Mon 02 SEP 1996 Page 5 ----------------------------------------------------------------------------------------------------------------------------------- Correlations of 50-year dated segments, lagged 25 years Flags: A = correlation under 0.3281 but highest as dated; B = correlation higher at other than dated position Seq Series Time_span 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 DCP01A 1591 1987 .50 .45 .47 .43 .43B .40B .47 .65 .78 .75 .63 .63 .54 .48 .66 .77 2 DCP01B 1591 1987 .40 .37 .46 .50 .57 .70 .70 .75 .62 .44 .61 .70 .52 .45 .68 .69 3 DCP02B 1590 1987 .49 .44 .45 .43 .31A .31A .41 .56 .74 .61 .57 .77 .74 .62 .41 .25B 4 DCP02C 1899 1987 .28A .22A .39 .38 5 DCP03A 1630 1987 .47 .52 .48 .42 .39 .65 .74 .71 .86 .81 .73 .76 .79 .78 6 DCP03B 1591 1628 .56 7 DCP03D 1636 1987 .25A .35 .40 .47 .58 .73 .59 .24B .26A .52 .47 .51 .69 .70 8 DCP04A 1606 1986 .33B .41 .49 .63 .52 .56 .79 .85 .85 .79 .46 .33A .61 .58 .47 9 DCP04B 1599 1905 .61 .61 .46 .49 .52 .46 .40 .60 .75 .66 .64 .47 .42 10 DCP04D 1907 1987 .69 .55 .39 11 DCP05A 1601 1987 .63 .64 .61 .57 .58 .64 .75 .75 .71 .70 .77 .70 .66 .35 .13B 12 DCP06A 1591 1987 .48 .39 .53 .64 .57 .63 .76 .73 .70 .61 .71 .82 .66 .37 .55 .64 13 DCP06B 1591 1987 .46 .49 .52 .57 .58 .44B .39 .61 .67 .51 .48 .57 .55 .57 .36 .31A 14 DCP07A 1587 1987 .59 .27A .03B .35 .45 .46 .43 .48 .72 .67 .64 .57 .53 .53 .66 .71 15 DCP07B 1597 1772 .30A .30A .19B .21A .37 .48 .40 16 DCP07D 1774 1987 .61 .62 .60 .75 .67 .53 .55 .69 .71 17 DCP08B 1588 1984 .48 .37 .36 .59 .48 .36 .52 .56 .41 .34 .55 .50 .42 .70 .71 .71 18 DCP09A 1591 1987 .51 .55 .44 .49 .61 .57 .68 .77 .68 .69 .75 .80 .65 .61 .79 .73 19 DCP09B 1601 1987 .57 .48 .60 .53 .58 .78 .55 .32A .54 .79 .81 .77 .66 .63 .67 20 DCP10A 1601 1987 .61 .56 .53 .60 .66 .67 .76 .67 .65 .80 .77 .68 .66 .73 .74 21 DCP10B 1597 1987 .65 .62 .66 .74 .64 .26B .31A .48 .52 .69 .78 .85 .68 .58 .69 .70 22 DCP11A 1601 1987 .29B .49 .67 .62 .47 .42 .54 .72 .77 .80 .63 .49 .56 .64 .51 23 DCP11B 1601 1987 .30A .28A .24B .46 .40 .43 .53 .62 .60 .55 .54 .56 .73 .67 .62 24 DCP12A 1590 1987 -.04B-.13B .21B .55 .70 .55 .56 .63 .64 .36 .33 .63 .59 .61 .64 .59 25 DCP12B 1589 1987 .66 .66 .56 .57 .67 .61 .44 .52 .59 .71 .66 .66 .67 .67 .72 .69 26 DCP12C 1847 1987 .53 .67 .59 .60 .66 .63 27 DCP13A 1592 1987 .46 .38 .44 .67 .71 .62 .49 .30B .18B .36 .68 .72 .64 .68 .48 .39 28 DCP13B 1589 1987 .59 .69 .72 .77 .61 .57 .64 .57 .73 .76 .76 .81 .67 .67 .69 .62 29 DCP14B 1601 1987 .44 .46 .71 .66 .58 .51 .54 .81 .70 .67 .63 .28B .25A .43 .40 30 DCP15A 1600 1987 .35 .42 .47 .68 .63 .48 .58 .52 .44 .63 .61 .43 .58 .61 .59 31 DCP15B 1591 1987 .40 .44 .39 .45 .64 .50 .41 .43 .56 .60 .64 .79 .69 .59 .61 .59 32 DCP17A 1591 1987 .48 .51 .36 .58 .65 .66 .65 .75 .84 .73 .67 .72 .64 .63 .74 .78 33 DCP17B 1591 1987 .42 .44 .44 .56 .56 .70 .70 .69 .72 .69 .58 .61 .69 .62 .65 .63 34 DCP18A 1600 1987 .57 .51 .56 .53 .28B .25B .47 .56 .58 .72 .75 .61 .47 .57 .54 35 DCP18B 1600 1987 .61 .46 .54 .60 .61 .60 .61 .73 .69 .76 .79 .66 .66 .51 .46 36 DCP19A 1591 1978 .46 .45 .43 .69 .79 .73 .61 .64 .71 .69 .84 .81 .60 .58 .62 .63 37 DCP19B 1590 1986 .52 .61 .50 .53 .70 .77 .68 .67 .85 .90 .91 .87 .75 .64 .49 .55 38 DCP20A 1590 1986 .69 .69 .65 .69 .64 .65 .73 .58 .57 .49 .46 .22A .00B .01B .21B .24A 39 DCP20B 1601 1987 .50 .49 .50 .55 .54 .62 .56 .68 .82 .38 .30B .56 .60 .57 .50 40 DCP21A 1598 1985 .55 .60 .51 .51 .51 .72 .65 .59 .55 .44 .55 .65 .61 .50 .24B .14B 41 DCP21B 1599 1985 .59 .65 .59 .61 .42 .45 .61 .66 .65 .54 .59 .57 .51 .58 .47 .36 42 DCP22A 1600 1987 .58 .30B .45 .64 .56 .69 .70 .76 .78 .77 .76 .65 .40 .44 .53 43 DCP22B 1601 1987 .60 .69 .76 .66 .57 .67 .74 .82 .81 .82 .84 .61 .53 .67 .64 44 DCP23B 1590 1987 .27B .25A .30B .55 .64 .69 .61 .55 .63 .61 .68 .68 .54 .58 .41 .34B 45 DCP24A 1615 1986 .41 .48 .62 .71 .69 .66 .71 .80 .77 .79 .82 .67 .58 .41 .33 46 DCP24B 1609 1987 .55 .48 .52 .68 .64 .72 .74 .83 .84 .79 .62 .34 .34B .49 .54 47 DCP25A 1599 1987 .53 .52 .49 .57 .35B .35 .52 .59 .69 .63 .61 .54 .43 .48 .50 .48 48 DCP25B 1502 1987 .50 .65 .49 .64 .70 .52 .65 .79 .67 .64 .74 .75 .61 .48 .63 .59 PART 7: DESCRIPTIVE STATISTICS: 16:05 Mon 02 SEP 1996 Page 8 ----------------------------------------------------------------------------------------------------------------------------------- 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 DCP01A 1591 1987 397 16 2 0.556 0.40 0.75 0.098 0.604 0.176 2.01 0.348 -0.001 1 2 DCP01B 1591 1987 397 16 0 0.574 0.45 1.05 0.164 0.788 0.183 1.95 0.244 -0.015 1 3 DCP02B 1590 1987 398 16 3 0.508 0.42 0.97 0.155 0.648 0.233 1.94 0.275 -0.057 1 4 DCP02C 1899 1987 89 4 2 0.354 0.53 1.12 0.213 0.704 0.242 1.96 0.329 -0.048 1 5 DCP03A 1630 1987 358 14 0 0.646 0.50 1.22 0.243 0.894 0.186 1.93 0.310 -0.022 1 6 DCP03B 1591 1628 38 1 0 0.559 0.43 0.61 0.093 0.487 0.183 1.95 0.454 0.017 1 7 DCP03D 1636 1987 352 14 3 0.454 0.37 0.77 0.121 0.723 0.211 1.76 0.215 0.005 1 8 DCP04A 1606 1986 381 15 2 0.567 0.52 1.15 0.218 0.781 0.228 1.88 0.271 -0.011 2 9 DCP04B 1599 1905 307 13 0 0.543 0.42 1.19 0.188 0.673 0.293 2.09 0.333 -0.039 1 10 DCP04D 1907 1987 81 3 0 0.504 0.51 1.19 0.210 0.474 0.319 2.09 0.355 -0.067 1 11 DCP05A 1601 1987 387 15 1 0.592 0.45 2.75 0.350 0.937 0.197 1.75 0.168 -0.022 1 12 DCP06A 1591 1987 397 16 0 0.620 0.33 0.76 0.102 0.698 0.187 1.93 0.247 -0.026 1 13 DCP06B 1591 1987 397 16 2 0.502 0.40 0.94 0.136 0.769 0.177 1.97 0.248 -0.018 1 14 DCP07A 1587 1987 401 16 2 0.510 0.30 1.28 0.190 0.870 0.261 1.97 0.270 -0.016 1 15 DCP07B 1597 1772 176 7 4 0.316 0.23 0.70 0.083 0.644 0.213 2.29 0.341 -0.028 1 16 DCP07D 1774 1987 214 9 0 0.622 0.46 1.04 0.174 0.735 0.219 2.11 0.322 -0.034 1 17 DCP08B 1588 1984 397 16 0 0.499 0.48 2.59 0.279 0.857 0.179 2.06 0.232 -0.021 1 18 DCP09A 1591 1987 397 16 0 0.641 0.25 1.03 0.116 0.689 0.246 2.04 0.300 -0.013 1 19 DCP09B 1601 1987 387 15 1 0.615 0.26 0.58 0.082 0.559 0.229 2.22 0.351 -0.009 1 20 DCP10A 1601 1987 387 15 0 0.679 0.47 1.41 0.198 0.785 0.198 2.15 0.344 -0.035 1 21 DCP10B 1597 1987 391 16 2 0.597 0.40 1.04 0.176 0.778 0.242 2.00 0.291 -0.006 1 22 DCP11A 1601 1987 387 15 1 0.565 0.66 2.21 0.250 0.831 0.165 2.02 0.335 -0.030 1 23 DCP11B 1601 1987 387 15 3 0.493 0.53 2.15 0.287 0.879 0.205 1.94 0.291 0.000 1 24 DCP12A 1590 1987 398 16 3 0.460 0.50 1.22 0.151 0.578 0.211 1.86 0.215 -0.034 1 25 DCP12B 1589 1987 399 16 0 0.622 0.46 0.83 0.134 0.600 0.206 1.88 0.224 0.006 1 26 DCP12C 1847 1987 141 6 0 0.572 0.58 1.22 0.161 0.426 0.219 2.05 0.368 -0.062 1 27 DCP13A 1592 1987 396 16 2 0.500 0.27 0.92 0.142 0.818 0.236 1.94 0.268 0.007 1 28 DCP13B 1589 1987 399 16 0 0.673 0.28 0.77 0.112 0.789 0.207 1.93 0.261 -0.038 1 29 DCP14B 1601 1987 387 15 2 0.529 0.67 2.91 0.452 0.908 0.187 1.93 0.245 -0.059 1 30 DCP15A 1600 1987 388 15 0 0.507 0.37 0.73 0.113 0.790 0.162 1.77 0.178 -0.007 1 31 DCP15B 1591 1987 397 16 0 0.543 0.50 1.82 0.165 0.764 0.144 1.99 0.240 -0.010 2 32 DCP17A 1591 1987 397 16 0 0.660 0.41 1.29 0.164 0.762 0.194 2.01 0.323 -0.007 3 33 DCP17B 1591 1987 397 16 0 0.618 0.37 1.24 0.162 0.810 0.193 1.95 0.243 -0.005 1 34 DCP18A 1600 1987 388 15 2 0.540 0.65 1.76 0.310 0.897 0.170 1.88 0.213 -0.029 1 35 DCP18B 1600 1987 388 15 0 0.625 0.48 1.22 0.172 0.809 0.176 2.01 0.307 -0.015 1 36 DCP19A 1591 1978 388 16 0 0.650 0.48 0.87 0.122 0.566 0.183 2.07 0.279 -0.025 1 37 DCP19B 1590 1986 397 16 0 0.693 0.44 0.86 0.135 0.728 0.182 1.95 0.276 -0.027 1 38 DCP20A 1590 1986 397 16 5 0.413 0.35 1.23 0.145 0.699 0.215 1.82 0.196 -0.034 1 39 DCP20B 1601 1987 387 15 1 0.531 0.44 1.52 0.169 0.721 0.206 1.91 0.221 -0.029 1 40 DCP21A 1598 1985 388 16 2 0.499 0.22 0.55 0.080 0.409 0.335 1.90 0.283 -0.007 1 41 DCP21B 1599 1985 387 16 0 0.529 0.31 0.75 0.126 0.690 0.249 1.98 0.263 -0.032 1 42 DCP22A 1600 1987 388 15 1 0.620 0.33 0.71 0.101 0.743 0.172 1.93 0.214 -0.039 2 43 DCP22B 1601 1987 387 15 0 0.673 0.38 0.80 0.140 0.844 0.168 1.83 0.223 -0.022 2 44 DCP23B 1590 1987 398 16 4 0.539 0.33 0.71 0.136 0.833 0.190 2.08 0.351 0.003 1 45 DCP24A 1615 1986 372 15 0 0.640 0.28 0.54 0.089 0.591 0.237 1.79 0.247 -0.017 1 46 DCP24B 1609 1987 379 15 1 0.626 0.24 0.54 0.086 0.655 0.243 1.89 0.294 -0.002 1 47 DCP25A 1599 1987 389 16 1 0.512 0.34 0.89 0.113 0.653 0.211 1.85 0.229 -0.022 1 48 DCP25B 1502 1987 486 16 0 0.622 0.30 0.62 0.092 0.719 0.186 1.93 0.186 -0.010 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 17121 680 52 0.568 0.41 2.91 0.165 0.736 0.207 2.29 0.266 -0.020