time series of gravity in finland
DESCRIPTION
photo: H. Ruotsalainen. Time series of gravity in Finland. Bilker, Mäkinen, Virtanen, Klopping, Falk, Timmen, Gitlein. SG. Groundwater. JILAg. JILAg with problems. Gravity change in µGal/yr. - PowerPoint PPT PresentationTRANSCRIPT
NKG
WGG
Mee
ting
2005
1
Time series of gravity in Finland
photo: H. Ruotsalainen
Bilker, Mäkinen, Virtanen, Klopping, Falk, Timmen, Gitlein
NKG
WGG
Mee
ting
2005
2
Absolute gravity at Sodankylä
y = -2.2238x + 5239
y = -3.0163x + 6820.1
780790800810820830840850860870
1970 1980 1990 2000Year
g - 9
8236
1000
µG
al
IMGCGABLJILAg-5Trend (JILAg)Trend (all)
-3.0 µGal/yr
-2.2 µGal/yr
NKG
WGG
Mee
ting
2005
3
Absolute gravity at Joensuu
794
796
798
800
802
804
806
808
810
812
814
1999 2000 2001 2002 2003 2004 2005
Year
g - 9
8207
5000
µG
al
JILAg-5FG5-221
Trend: -2.0 µGal/yr
NKG
WGG
Mee
ting
2005
4
Absolute gravity at Vaasa AA at 100 cm
y = -2.2236x + 4882.1
410
420
430
440
450
460
470
1985 1990 1995 2000 2005
Year
g - 9
8209
0000
µG
al
JILAg-5FG5-111FG5-221FG5-220
Trend: -2.2 µGal/yr
NKG
WGG
Mee
ting
2005
5
Absolute gravity at Vaasa AB
y = -2.1169x + 5205
955
960
965
970
975
980
985
990
1995 2000 2005
Year
g - 9
8207
5000
µG
al
JILAg-5FG5-111FG5-220FG5-221
Trend: -2.1 µGal/yr
NKG
WGG
Mee
ting
2005
6
510
520
530
540
550
560
570
1975 1980 1985 1990 1995 2000 2005Year
g - 9
8191
6000
µG
al
GABL_AJILAg-5_GJILAg-5_AJILAg-5_BFG5-111_BFG5-101_BFG5-102_GFG5-220_BFG5-221_B
Combined absolute gravity at Metsähovi at 120 cm
Trend: -1.1 µGal/yr
NKG
WGG
Mee
ting
2005
7
Absolute gravity at Metsähovimeasured with JILAg-5 at 120 cm
y = -0.547x + 1620.3
515
520
525
530
535
540
545
1985 1990 1995 2000 2005
Year
g - 9
8191
6000
µG
al
Station GStation AStation B
Trend all: -0.5 µGal/yr
Absolute gravity at Metsähovimeasured with FG5 instruments at 120 cm
y = -0.6876x + 1894
514
516
518
520
522
524
526
1990 1995 2000 2005
Year
g - 9
8191
6000
µG
al
FG5-111_BFG5-101_BFG5-102_GFG5-220_BFG5-221_B
Trend:-0.7 µGal/yr
NKG
WGG
Mee
ting
2005
8SG JILAg JILAg with problems Groundwater
NKG
WGG
Mee
ting
2005
9
Gravity change in µGal/yr
Station Data used
Measured
LambeckGIA
Ekman
Map
FinnRef
GPS
Levelling
FGI 3x
BIFROST
GIAMetsähovi all -1.1
-0.8 -0.9 -0.9 -0.9 -0.8JILAg -0.5
FG5 -0.7Vaasa AA -2.2 -1.7 -1.8
Vaasa AB -2.1 -1.7 -1.8 -1.6 -1.8 -2.0
Sodankylä all -3.0
-1.5 -1.5 -1.3 -1.4 -1.6JILAg -2.2
Joensuu -2.0 -0.9 -0.8 -0.6 -0.7 -0.9µGal/cm 6.00.2
hg NHHh ea