Jökull - 01.12.1972, Page 61

Elliott, W. P. 1958: The growth of the atmos-
pheric internal boundary layer. Trans. Am.
Geophys. Union. 39, 1048.
tíavens, J. M., Miiller F. and Wilmot, G. C.
1965: Comparative Meteorological Survey
and a Short-term Heat Balance Study of the
White Glacier. Axel Heiberg Island Re-
search Reports, McGill University, Monteal.
Hoinkes, H. C. 1964: Glacial meteorology. Re-
search in Geophysics 2, 391—424 The MIT
Press, Cambridge, Massachusetts.
Hoinkes, H. and Untersteiner, N. 1952: Várme-
umsatz und Ablation auf Alpengletschern,
I. Vernagtferner (Otztaler Alpen), Aug.
1950. Geogr. Ann. 34, 99—158.
Högström, U. 1967: Turbulent Water-Vapor
Transfer at Different Stability Conditions.
The Physics of Fluids Supplement. Am.
Inst. of Physics, New York, p. 247—254.
Liest<j>l, O. 1967: Storbreen Glacier in Jotun-
heimen, Norway. Norsk Polarinstitutt,
Skriíter, Nr. 141 (63 pp).
Lister, H. 1959: Micro-Meteorology over Dirt
Coned Ice. Jökull 9: 1—6.
Lumley, J. L. and Panofsky, H. A. 1964: The
Structure of Atmospheric Turbulence.
Intersci. Publ. J. Wiley Sc Sons, New York.
McVehil, G. E. 1964: Wind and temperature
profiles near the ground in stable stratifica-
tion. Quart. J. Roy. Meteorol. Soc. 90, 136.
Munn, R. E. 1966: Descriptive Micrometeoro-
logy. Advances of Geophysics, Supplement
1. Academic Press, New York.
Monin, A. S. and Obukhov, A. M. 1954: Basic
laws of turbulent mixing in the ground
layer of the atmosphere. Geophys. Inst.
Acad. Sci. U.S.S.R. 24, No. 151, 163-187
(English transl. from the Russian by Am.
Meteorol. Soc. T-R-147, AF 19(604)—1936).
Miiller, F. and Keeler, C. M. 1969: Errors in
short-term ablation measurements on melt-
ing ice surfaces. Jour. of Glaciology, 8,
91-105.
Paterson, W. S. B. 1969: The Physics of Glaciers.
250 pp. Pergamon Press, London.
Schytt, V. 1970: An attempt at a combined
study of the ice and water balance for a
partly glacierized drainage basin. Oral
paper, Annual General Meeting of Tlie
Glaciological Society, Cambridge.
Stenborg, T. 1970: Delay of run-off from a
glacier basin. Geogr. Ann. 52, Ser. A, p.
1-30.
Sverdrup, H. U. 1936: The eddy conductivity
of air over a smooth snow field. Res.
Norw.-Swedish Spitsbergen Exp. in 1934.
Geof. Publ., Vol. XI, No. 7, Oslo.
Swinbank, W. C. 1964: The exponential pro-
file. Quart. J. Roy. Meteorol. Soc., 90, 119
Tangborn, W. V., Krimmel, R. M. and Meiei,
M. F. 1971: A comparison of glacier mass
balance by glaciologic, hydrologic, ancl
mapping methods, South Cascade Glacier,
Washington. Paper given at the IUGG
Symposium in Moscow, USSR.
Taylor, R. J. 1960: Similarity theory in relation
between fluxes and gradients in the lower
atmosphere. Quart. J. Roy. Meteorol. Soc.
86, 67-78.
Wallén, C. C. 1948: Glacial-meteorological in-
vestigations on the Kársa glacier in Swedish
Lapland 1942—1948. Geogr. Ann., 30, 451
-672.
Wendler, G. 1964: Die Berechnung des Strahl-
ungsanteils an der Ablation im Gebiet des
Hintereis- und Kesselwandferner (Ötztaler
Alpen) im Sonnner 1958. Dissertation Uni-
versitát Innsbruck 1964.
Á G R I P
Hér birtist síðari greinin um rannsóknir á
Bægisárjökli sumrin 1967 og 1968. í fyrri
greininni er m. a. lýsing á almennu veðurfari,
og sést glöggt, að sumarleysing jökulsins stafar
í senn af geislun, lofthita og loftraka (Helgi
Björnsson 1971). Hér er lýst, hvernig má finna
stærð liinna ýmsu orkuþátta og meta hlut þeirra
í leysingunni. Þrír þættir valda leysingu á
bráðnandi jökli: geislun og varmastreymi frá
röku og hlýju lofti yfir jökli.
Geislun
Geislun á jökli má flokka í tvennt. í fyrsta
lagi sólargeislun (stuttbylgjugeislun) og í öðru
lagi geislun frá skýjum og jökli (langbylgju-
geislun). Geislun sólar á láréttan flöt var fund-
in með geislamæli og eru niðurstöður birtar í
fyrri grein, mynd 5 og 6 (Helgi Björnsson 1971).
JÖKULL 22. ÁR 59