eruption at or near Grímsvötn, was about to
begin, or was already in progress. Immediately,
NCPA upgraded to alert phase and OACC di-
verted all air traffi c to >60 nautical miles (>111
km) distance from Grímsvötn. A volcano-SIG-
MET warning of a signifi cant meteorological
hazard to aviation was broadcast at 2026 UTC,
specifying the likely location and probable
height of the tephra plume
/media/jar/myndsafn/2005EO260001.pdf
) and Jónsdóttir (2008).
Therefore, comparison of measured and simulated water balance cannot be di-
rectly used for validation of the model-generated precipitation. According to the
non-scaled MM5 output for the period 1961–1990, mean precipitation for the
whole of Iceland was 1790 mm y−1. After scaling the precipitation, this value
was reduced to 1750mm y−1, i.e. by approximately 2%. This difference
/media/ces/Paper-Olafur-Rognvaldsson_92.pdf
2609 BEITO NO +61:14:35 +08:51:20 754 P
2610 BIRI NO +60:57:10 +10:35:49 190 P
2611 ABJORSBRATEN NO +60:55:05 +09:17:25 639 TP
2612 BOVERDAL NO +61:43:14 +08:14:39 701 P
2613 ESPEDALEN NO +61:25:00 +09:32:04 752 P
2614 LUNNER NO +60:17:39 +10:34:49
/media/ces/CES_D2.4_task1.pdf
m
J
M5 [C°] -3
obs. [C°] -4
nce 1
re 5. Comp
26); an int
temperatu
this system
y gridded v
picion abo
-Jökulsá w
similar dif
han observ
h elevation
ces the effe
months No
ly only on
high the tem
n band wi
refore be s
onthly tem
an Feb Ma
.2 -3.1 -3.
.3 -4.1 -3.
.1 1.0 0.6
arison of m
erpolation
re is shown
atic differe
alues, see T
ut the qual
atershed; b
ference wa
ations for t
gradient fo
/media/ces/2010_017.pdf
at each site i with the same method used to estimate qR(D;T ), but instead of pooling
AMF series for a given duration D from different sites, the estimation is made individually for
each site i by pooling AMF series for different durations D (see Crochet, 2012c). The index
flood µi(D), is modeled at each site i as a continuous function of D, as follows:
µi(D) =
µi
1+(D=Di)li
; (5)
where µi, Di/media/vedurstofan/utgafa/skyrslur/2014/VI_2014_001.pdf
Veðurstofa Íslands
2 Almannavarnadeild Ríkislögreglustjóra
3 Jarðvísindastofnun Háskólans
4 Istituto Nazionale di Geofisica e Vulcanologia (INGV), Bologna
5 Istituto Nazionale di Geofisica e Vulcanologia (INGV), Pisa
6 Jarðvísindadeild Háskóla Íslands
7 Agricultural University of Iceland
8 Consultant
Skýrsla nr. Dags. ISSN Opin Lokuð
VÍ 2020-011 Desember 2020 1670-8261 Skilmálar:
Heiti skýrslu
/media/vedurstofan-utgafa-2020/VI_2020_011_en.pdf
The hydrological simulations were performed with the Wa-
tershed Simulation and Forecasting System (WSFS) developed
and operated in the Finnish Environment Institute (Vehviläinen
et al., 2005). The WSFS is used in Finland for operational hydrolog-
ical forecasting and flood warnings (www.environment.fi/water-
forecast/), regulation planning and research purposes
(Vehviläinen and Huttunen, 1997
/media/ces/Journal_of_Hydrology_Veijalainen_etal.pdf