.. But with caution
Spatial scale
Modifiable Areal Unit Problem (MAUP)
Ecological fallacy: The mistake of assuming that
where relationships are found among aggregate data,
these relationships will also be found among individuals
or households, or vice versa.
Key concepts (from ecology)
Forest cover Population
density
y = -20.1Ln(x) + 60
R2 = 0.84
0
20
40
60
80
100
0 5 10 15
Population density
F
o
re
/media/loftslag/Kok_1-scenarios-lecture-1.pdf
was therefore formed
by ice lifting and deformation induced by subglacial water pressures higher than ice
overburden pressure.
The discharge data and the derived size of the subglacial flood path, as indicated
by the volume of water stored subglacially, indicates a development towards more
efficient subglacial flow over the course of the jökulhlaup. Thus, a discharge in the
iii
range 80–90 m3 s 1
/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_006_tt.pdf
Oddur Sigurðsson, Óðinn Þórarinsson, Philippe Crochet, Tómas Jóhannesson & Þorsteinn Þorsteinsson (2012). Floods in Iceland. In: Z. W. Kundzewicz (ed), Changes in Flood Risk in Europe. Oxfordshire: IAHS Special Publication 10, 257-276.
Hálfdán Ágústsson & Haraldur Ólafsson (2012). The bimodal downslope windstorms at Kvisker. Meteorology and Atmospheric Physics 116(1-2), 27-42, doi:10.1007/s00703
/about-imo/arctic/completed-projects/publications/
: Significant at 90% CL
Norwegian Meteorological Institute met.no
Fokstugu (973 m.a.s.l.)
Introduction Data & Methods Results
Trends in start and end:
Significant at 99% CL
/media/ces/Dyrrdal_Anita_CES_2010.pdf
2015, 2025, 2035 and 2050
North (Blanda) East (Karahnjukar) South (Thorisvatn)
Change in average inflow to the main storage reservoirs
Watershed
A
v
e
r
a
g
e
i
n
f
l
o
w
[
m
3
/
s
]
0
2
0
4
0
6
0
8
0
1
0
0
1
2
0
Last 50 years
Last 20 years
Last 15 years
Last 10 years
Last 5 years
Temperature corrected
Transformation of climate measurements
•Change in temperature
• 0.75 °C/100y 1950-1975
• 1.55
/media/ces/Linnet_Ulfar_CES_2010.pdf
)
Annual
Winter
Summer
• Accounts for natural
variability and differences
between climate models
Width of the distribution primarily determined by
natural temperature variability: larger in winter than in summer.
Winter Summer Annual
Best estimate (ºC) 1.3 0.7 1.0
5-95% uncertainty range (ºC) -0.5…+3.1 -0.2…+1.6 0.0…+1.8
Probability of warming (%) 90% 90% 96%
Ref: Räisänen and Ruokolainen (2007
/media/loftslag/Case_B___Road_transport_operation_and_infrastructure_planning.pdf
Nesjum
0-5 5-10 10 15 20-15
2008-2018
1979-1989
Dæmi um ólíkt rennslismynstur.
100
9080
70
60
50
40
30
20
10
0
Júní
mánaðarmeðaltal
Ársmeðaltal
Rennsli
m
3 /s
Sigurvegarinn í getraun Veðurstofunnar á Vísindavöku Rannís hlaut
heimsókn á Veðurstofuna að launum. Salka Elín Sæþórsdóttir ásamt
vinum sínum, Ými og Bjarti. Með þeim á myndinni er Ragnar Heiðar
Þrastarson, fagstjóri landfræðilegra
/media/vedurstofan/utgafa/arsskyrslur/VI_Arsskyrsla_2018_vef.pdf
Av. Ed.
Belin, 31400 Toulouse, France
Received: 21 March 2011 – Published in The Cryosphere Discuss.: 6 April 2011
Revised: 5 October 2011 – Accepted: 20 October 2011 – Published: 2 November 2011
Abstract. The Little Ice Age maximum extent of glaciers in
Iceland was reached about 1890 AD and most glaciers in the
country have retreated during the 20th century. A model for
the surface mass balance
/media/ces/Adalgeirsdottir-etal-tc-5-961-2011.pdf
Figure 2.3. An overview of the Geysir region. ..................................................................... 20
Figure 2.4 Testing different values for maximum group size in area A1. ............................ 23
Figure 2.5. Testing different values for maximum group size in area A1. ........................... 24
Figure 2.6. A map showing relative locations in box A1 for maximum
/media/vedurstofan/utgafa/skyrslur/2010/2010_003rs.pdf