pm ff1_pet•new york’s piermont marsh: a 7000-year record, dorothy peteet (lamont-doherty earth...

8/11/2019 PM FF1_Pet New Yorks Piermont Marsh: A 7000-year Record, Dorothy Peteet (Lamont-Doherty Earth Observatory and NASA Goddard Institute for Space Studies)eet Final

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Sample

depth

c m )

I t ems ana l yzed

Uncor rec ted

rad iocarbon

a g e

Calendar age

range 1 s igma)

f rom CAL IB 4 .3

Ca lendar

age yr

A D )

80-84 4 black Scirpus seeds 145 40* 1724-1777 (33%) 1750*

88-92 woody long stem modern

96-100 6 black medium Scirpus seeds 270 40* 1627-1665 (49%) 1646*

92-96 7 black Scirpus seeds 275 40* 1626-1662 (45%) 1644*

108-112 Scirpus stem 355 35* 1565-1628 (59%) 1600*

120-124 2 Scirpusnodes 520 35 1403-1434 (100%) 1418

132-136a 1 sedge node, 1 Eleocharis seed 515 45* 1399-1439 (94%) 1420*

132-136b 1 Dirca-type seed, 5 yellow Scirpus seeds 600 60 1303-1368 (78%) 1336

140-144 2 sedge nodes, 1 woody fragment 455 35 1422-1455 (91%) 1439

148-152 1 black Scirpus, 2 yellow Scirpus seeds 660 70* 1346-1393 (52%) 1370*

168-172 3 charcoal pieces, 1 large Scirpus seed 70 40 1876-1917 (44%)

176-1802 black medium Scirpus seeds, 3

Eleocharis seeds, 1 white Carex seed785 45* 1221-1278 (100%) 1250*

184-1881 Cladium, 1 Carex , 2 yellow Scirpus

seeds1035 45 975-1030 (87.5%) 1003

188-192 1300 35 674-720 (66%) 697

192-196 2 charcoal stems 1030 40* 977-1032 (100%) 1005*

214-216 1 Cladium , 5 yellow Scirpus seeds 1210 40* 785-884 (92.5%) 835*

276-278 2 Polygonum seeds 1580 80* 405-564 (95.5%) 484*

Table 1. Radiocarbon dates on macrofossils dated at LLNL. Calendar ages were calculated using CALIB

4.3 (Stuiver et al., 1998a). Age ranges are shown for the calendar range used in calendar calculation.

Percent area represented by the calendar range is shown in parentheses (). Selected dates are

marked by an asterisk (*).


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0

5 0

1 0 0

1 5 0

2 0 0

2 5 0

3 0 0

- 5 0 1 5 0 3 5 0 5 5 0 7 5 0 9 5 0 1 1 5 0 1 3 5 0 1 5 5 0

year BP

D

h

c

m

)

1644 AD 306 yr BP)

1600 AD 354 yr BP)

1420 AD 527 yr BP)

0 . 26 c m / y r

0 . 33 c m / y r

0 . 14 c m / y r

1370 AD 581 yr BP)

. 30 c m / y r

1250 AD 701 yr BP)

0 . 23 c m / y r

1005 AD 946 yr BP). 07 c m / y r

835 AD 1120 yr BP). 13 c m / y r

0 . 18 c m / y r

484 AD

1466 yr BP)

Piermont Marsh Sediment Accumulation Rates

T/'='+.*2J /'3''3J '3 5BM V::aU


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0

5

10

15

20

25

30

-1000 0 1000 2000 3000 4000 5000 6000

Cs-137 (pCi/kg)

A

veragedepth(cm)


19/45

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0.000 0.200 0.400 0.600 0.800 1.000

0.00

0.12

0.24

0.360.48

0.60

0.72

0.84

0.96

1.08

1.20

1.32

1.44

1.56

1.68

1.80

1.92

2.04

2.16

2.28

2.40

mass g)

dry wt. (g) organic wt. (g)

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Piermont Marsh: Organic & Inorganic Content, K, and Ti

Organic and Inorganic Content

0.0 0.2 0.4 0.6 0.8 1.0

0

50

100

150

200

1725 A.D.

1640 A.D.

1418 A.D.

1358 A.D.

1331 A.D.

Potassium (ppm)12000 14000 16000 18000 20000 22000

1237 A.D.

969 A.D.

Titanium (ppm)

2000 3000 4000 5000 6000

Organic content

Inorganic Content

K (ppm)

Ti (ppm)

Rf::

R9::

RK::

RfLW

V::9


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XRF Results Piermont

23

V::9


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Sediment component masses, Piermont N

0.000 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 2.000

0.00

0.36

0.72

1.08

1.44

1.80

2.16

2.52

2.88

3.24

3.60

3.96

4.33

4.71

5.09

5.48

5.87

6.29

6.71

7.12

7.50

7.87

8.25

8.63

9.00

9.41

9.82

10.20

10.57

10.93

11.28

11.64

12.03

12.46

12.88

13.32

mass g)

Sediment component masses, Piermont Marsh

De p t h

(

m)

mass(g)

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Medieval Warm Period (MWP): ~800-1300 A.D.Little Ice Age (LIA): ~1400-late 1800s A.D.

Piermont Marsh, NY influx data


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Hudson Estuary

Climate History

Human Influences

River Processes

pm ff1_pet•new york’s piermont marsh: a 7000-year record, dorothy peteet (lamont-doherty earth...

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