38
0.2
0.1
–0.1
–0.2
0.0
22nd 12:00
2nd
9th
16th
23rd
30th
January
April
July
October
1980
1990
2000
2010
0
500
1000
1500
2000
0
500
1000
1500
2000
23rd 00:00
Day and Time in April 2018
a
b
c
d
e
f
Day of April 2018
Month of 2018
Sea Level (m)
Year CE
Year CE
Year CE
Neap Tides
Tropical Storm Michael
Hurricane Florence
Spring Tides
23rd 12:00 24th 00:00
0.2
1.5
1.3
0.0
–1.0
–2.0
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
1.2
1.1
1.0
0.9
1.0
0.5
–0.5
0.0
0.1
–0.1
–0.2
0.0
Fig. 3.3 Measurements
(red lines) of sea level
made by the Oregon Inlet
tide gauge over (a) two
days in April 2018 (b) all
of April 2018, (c) all of
2018, and (d) 1973–2018.
In some panels a blue line
represents the predicted
sea level. Differences
between measured and
predicted values usually
represent the effects of
ocean weather such as
storms. (e) Relative
sea-level rise for the past
2000 years reconstructed at
Sand Point, North Carolina
from salt-marsh sediment.
(f) Detrended sea-level
change at Sand Point,
North Carolina. This curve
(for the past 2000 years)
was created by removing
the linear contribution
from glacio-isostatic
adjustment. It is clear that
recent rise beginning in the
late 1800s is unusually fast
and large in the context of
the preceding centuries.
Note that time and vertical
scale varies among panels
A. C. Kemp and B. P. Horton