Jökull

Ataaseq assigiiaat ilaat

Jökull - 01.01.2019, Qupperneq 121

Jökull - 01.01.2019, Qupperneq 121
Tussetschläger et al. breytingar eftir tímabilum voru bornar saman við veð- urfarsgögn frá nærliggjandi veðurstöðvum með það að markmiði að kanna tengsl við mögulegan sífrera á svæðunum. Þessar aðferðir reyndust ágætlega og má vel nýta háupplausnar gervitunglamyndir við greiningu fanna í fjalllendi á Íslandi. Kortlagningin sýnir tilvist nokk- urra fanna á öllum svæðunum á um 30 ára tímabili, þó er útbreiðsla þeirra mjög breytileg eftir svæðum og tímabilum. Þar skiptir máli landslag, hæðyfir sjáv- armáli og lega (viðmót) á hverju svæði, en beitt var ákveðnum síunaraðferðum við greiningu fannana til að draga úr þeim áhrifum. Þrjú svæðanna, Brimnes- dalur, Búrfellsdalur og Kerling, skera sig úr en þar er útbreiðsla fanna og líkur á tilvist þeirra langmest- auk þess sem lega þeirra er mjög svipuð allan tím- ann. Samanburður við veðurfarsgögn bendir til að kortlagningu fanna í samhengi við meðalárshita megi nota sem vísbendingu um tilvist sífrera í fjalllendi Tröllaskaga. Flestar fannanna eru þar sem meðalárs- hiti reiknast nokkrum gráðum undir frostmarki, ofan 800 m hæðar. Þar sjást sömu fannirnar með nokkuð breytilega útbreiðslu á öllum myndum á 30 ára tíma- bilinu og eru þær taldar tengjast tilvist sífrera á þeim stöðum. REFERENCES Allen, S., S. Cox and I. Owens 2010. Rock-avalanches and other landslides in the central Southern Alps of New Zealand: A regional assessment of possible cli- mate change impacts. Landslides 8, 33–48. https://doi.org/10.1007/s10346-010-0222-z. Allen, T. R. 1998. Topographic context of glaciers and perennial snowfield, Glacier National Park, Montana. Geomorphology 21, 207–216. https://doi.org/10.1016/S0169-555X(97)00059-7 Andrés, N., L. M. Tanarro, J. M. Fernández and D. Pala- cios 2016. The origin of glacial alpine landscape in Tröllaskagi peninsula (north Iceland). Cuadernos de Investigación Geográfica 42, 341–368. https://doi.org/10.18172/cig.2935 Björnsson, H. 1991. Jöklar á Tröllaskaga. Árbók Ferða- félags Íslands, 21–37. Björnsson, H. and F. Pálsson 2008. Icelandic glaciers. Jökull 58, 365–386. Björnsson, H., T. Jónsson, S. S. Gylfadottir and E. O. Ola- son 2007. Mapping the annual cycle of temperature in Iceland. Meteorologische Zeitschrift 16, 45–56. Brynjólfsson, S. and H. Ólafsson 2009. Precipitation in the Svarfaðardalur region, North-Iceland. Meteorol- ogy and Atmospheric Physics 103, 57–66. https://doi.org/10.1007/s00703-008-0348-x Brynjólfsson, S. 2018. Afkoma jökla á Tröllaskaga 2016– 2017. Icelandic Institute of Natural History, report NI- 18008, 20 pp. Brynjólfsson, S. 2019. Afkoma jökla á Tröllaskaga 2017– 2018. Icelandic Institute of Natural History, report NI- 19004, 24 pp. Brynjólfsson, S., Ó. Ingólfsson and A. Schomacher 2012. Surge fingerprinting of cirque glaciers at the Trölla- skagi peninsula, north Iceland. Jökull 62, 151–166. Bühler, Y., S. Kumar, J. Veitinger, M. Christen, A. Stoffel and A. Snehmani 2013. Automated identification of potential snow avalanche release areas based on dig- ital elevation models. Natural Hazards Earth System Science 13, 1321–1335. https://doi.org/10.5194/nhess-13-1321-2013 Crane, R. G. and M. R. Anderson 1983. Satellite discrim- ination of snow/cloud surface. Int. J. Remote Sensing 5, 213–233. https://doi.org/10.1080/01431168408948799 Crochet, P., T. Jóhannesson, T. Jónsson, O. Sigurðsson, H. Björnsson, F. Pálsson and I. Barstad 2007. Estimating the spatial distribution of precipitation in Iceland using a linear model of orographic precipitation. J. Hydrom- eteorology 8, 1285–1306. https://doi.org/10.1175/2007JHM795.1 Damm, B. and M. Langer 2006. Kartierung und Region- alisierung von Permafrostindikatoren im Rieserfern- ergebiet (Südtirol/Osttirol). Mitteilungen der Österre- ichischen Geographischen Gesellschaft 148, 295–314. Dozier, J. 1989. Spectral signature of alpine snow cover from the Landsat Thematic Mapper. Remote Sensing 28, 9–22. https://doi.org/10.1016/0034-4257(89)90101-6 Dozier, J. and T. Painter 2004. Multispectral and hyper- spectral remote sensing of alpine snow properties. Ann. Review of Earth and Planetary Sci. 32, 465–494. https://doi.org/10.1146/annurev.earth.32.101802.120404 Einarsson, M. Á. 1984. Climate of Iceland. In: Van Loon, H. (ed.). World survey of climatology - climate of the oceans, 673–697. 120 JÖKULL No. 69, 2019
Qupperneq 1
Qupperneq 2
Qupperneq 3
Qupperneq 4
Qupperneq 5
Qupperneq 6
Qupperneq 7
Qupperneq 8
Qupperneq 9
Qupperneq 10
Qupperneq 11
Qupperneq 12
Qupperneq 13
Qupperneq 14
Qupperneq 15
Qupperneq 16
Qupperneq 17
Qupperneq 18
Qupperneq 19
Qupperneq 20
Qupperneq 21
Qupperneq 22
Qupperneq 23
Qupperneq 24
Qupperneq 25
Qupperneq 26
Qupperneq 27
Qupperneq 28
Qupperneq 29
Qupperneq 30
Qupperneq 31
Qupperneq 32
Qupperneq 33
Qupperneq 34
Qupperneq 35
Qupperneq 36
Qupperneq 37
Qupperneq 38
Qupperneq 39
Qupperneq 40
Qupperneq 41
Qupperneq 42
Qupperneq 43
Qupperneq 44
Qupperneq 45
Qupperneq 46
Qupperneq 47
Qupperneq 48
Qupperneq 49
Qupperneq 50
Qupperneq 51
Qupperneq 52
Qupperneq 53
Qupperneq 54
Qupperneq 55
Qupperneq 56
Qupperneq 57
Qupperneq 58
Qupperneq 59
Qupperneq 60
Qupperneq 61
Qupperneq 62
Qupperneq 63
Qupperneq 64
Qupperneq 65
Qupperneq 66
Qupperneq 67
Qupperneq 68
Qupperneq 69
Qupperneq 70
Qupperneq 71
Qupperneq 72
Qupperneq 73
Qupperneq 74
Qupperneq 75
Qupperneq 76
Qupperneq 77
Qupperneq 78
Qupperneq 79
Qupperneq 80
Qupperneq 81
Qupperneq 82
Qupperneq 83
Qupperneq 84
Qupperneq 85
Qupperneq 86
Qupperneq 87
Qupperneq 88
Qupperneq 89
Qupperneq 90
Qupperneq 91
Qupperneq 92
Qupperneq 93
Qupperneq 94
Qupperneq 95
Qupperneq 96
Qupperneq 97
Qupperneq 98
Qupperneq 99
Qupperneq 100
Qupperneq 101
Qupperneq 102
Qupperneq 103
Qupperneq 104
Qupperneq 105
Qupperneq 106
Qupperneq 107
Qupperneq 108
Qupperneq 109
Qupperneq 110
Qupperneq 111
Qupperneq 112
Qupperneq 113
Qupperneq 114
Qupperneq 115
Qupperneq 116
Qupperneq 117
Qupperneq 118
Qupperneq 119
Qupperneq 120
Qupperneq 121
Qupperneq 122
Qupperneq 123
Qupperneq 124
Qupperneq 125
Qupperneq 126
Qupperneq 127
Qupperneq 128
Qupperneq 129
Qupperneq 130
Qupperneq 131
Qupperneq 132
Qupperneq 133
Qupperneq 134
Qupperneq 135
Qupperneq 136
Qupperneq 137
Qupperneq 138
Qupperneq 139
Qupperneq 140
Qupperneq 141
Qupperneq 142
Qupperneq 143
Qupperneq 144
Qupperneq 145
Qupperneq 146
Qupperneq 147
Qupperneq 148
Qupperneq 149
Qupperneq 150
Qupperneq 151
Qupperneq 152
Qupperneq 153
Qupperneq 154
Qupperneq 155
Qupperneq 156
Qupperneq 157
Qupperneq 158
Qupperneq 159
Qupperneq 160
Qupperneq 161

x

Jökull

Direct Links

Hvis du vil linke til denne avis/magasin, skal du bruge disse links:

Link til denne avis/magasin: Jökull
https://timarit.is/publication/1155

Link til dette eksemplar:

Link til denne side:

Link til denne artikel:

Venligst ikke link direkte til billeder eller PDfs på Timarit.is, da sådanne webadresser kan ændres uden advarsel. Brug venligst de angivne webadresser for at linke til sitet.