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35
grændsen for disse Tversnit er Østgrændsen for
Grønlands-isen. eller om denne skulde være usædvanlig langt
tilbagetrukket mod Vest. en "Linje, der tillader ved Lodskuddene
at opnaa en sikker Kundskab om Havbundens Form i det
Store og et nøjagtigt Studium af det lier antagelig værende
dyriske Protoplasma, som fandtes i 1877 ved rian Mayen.
Vestenfor Spidsbergen er Bundens Form i det Store taget
nogenlunde kjendt efter de svenske Expeditionen
Lodninger. Men da paa den Tid disse foretoges (1868) endnu
intet paalideligt Dybvandsthermometer havdes og Skrabninger
paa store Dyb med store Apparater ikke vare komne igang,
vil det for vor Expeditions Øjemed være nødvendigt at
gjennemgaa det hele Felt systematisk. Da Afstanden
mellem Spidsbergens Vestkyst og Grønlandsisen aftager raskt
mod Nord. blive Tversnittene her efterhaanden kortere og
kunne derfor samtlige lægges helt over den nævnte Afstand
med en indbyrdes Afstand af en god Breddegrad.
Paa Bankerne sættes Lodskud saa tæt. at disses
Af-held mod Dybet bliver bestemt paa en utvetydig Maade.
Ude i det store Ishavsdyb vil en Meridiangrad (60
Kvartmil) antagelig være en passende Afstand mellem
Lodskuddene i samme Tversnit.
En Gjenstand for speciel Undersøgelse bliver den
varme Atlanterhavs Strøms Løb og Udstrækning mellem
Beeren Eiland og Spidsbergen. Denne Undersøgelse, der
fordrer Rækker af tættere Lodskud med Temperaturra^kker.
lover at blive af overordentlig stor Betydning for
Havstrømmenes Theori, da den varme Strøm her flyder nordover
mellem 2 sydovergaaende Polarstromme. Grønlandshavets j i
Vest og Østspidsbergen — Beeren Eiland’s mod Øst.
Dersom Isforholdene tillade det. udstrækkes
Undersøgelserne til Spidsbergens Nordkyst. Antagelig er her
Po-larstrommen alene raadende og dermed en passende Grændse
sat for Expeditionens Arbejder mod Nord.
At udstrække Rejsen saa langt ind i Polarstrommen.
som Isforholdene tillade, er af Vigtighed l’or Undersøgelsen
af det i 1877 ved Jan Maven fundne Protoplasma.
•
Undersøgelserne antages at burde deles i 3
Afdelinger. mellem hvilke anløbes nærmeste norsk Havn
(Hammerfest) for Udrustning med Kul. Vand. Proviant etc. Turen
til Øst-Ishavet antages at burde, foretages først, da Isen
her antagelig tidligere trækker sig tilbage end i
Grønlandshavet. Turen til Spidsbergen lægges til August Maaned,
der er den bedste Aarstid paa disse Kanter. Turen
vesterud til Grønlandshavet norden for Jan Mayen bliver
saaledes den 2den i Rækken.
tions will extend westward from the most northerly section
investigated the year before. The western limit for these
sectious will coincide with the eastern boundary of the
Greenland ice-barrier, or, in the event of that barrier
having receded unusually far west, with a line allowing the
contour of the sea-bed on the Greenland side to be
broadly determined, and offering ample opportunity for
a detailed study of the animal protoplasma met with in
1877 off the island of Jan Mayen, and believed to occcur
also in this region. West of Spitzbergen. the contour of
the bottom was broadly determined by soundings taken on
the Swedish Expeditions. No trustworthy deep-sea
thermometer having however at that time been devised (1868).
nor dredgings essayed at great depths with apparatus of
proportionate dimensions, the whole of the tract will need
to be gone over anew and systematically investigated. The
distance between the west coast of Spitzbergen and the
Greenland ice-barrier rapidly diminishing towards the north,
the transverse sections here will get gradually shorter, and
mav accordingly be laid right across, at intervals slightly
exceeding one degree of latitude.
On the banks, the soundings shall be taken with
sufficient frequence to admit of clearly determining the seaward
incline. In the great Arctic basin, intervals of 60 miles,
or one meridional degree, will, it is believed, be a suitable
distance at which to sound in one and the same section.
A subject for special investigation will be the flow
and extent of the warm Atlantic current between Beeren
Eiland and Spitzbergen. The solution of the problem
therein involved, which calls for series of closer soundings,
together with serial temperatures, cannot but furnish highly
important data bearing directly on the theory of ocean
currents. the warm Atlantic water here flowing northwards
between two southward-setting Polar currents. — a western
through the Greenland Sea. and an eastern passing along
the shores of East Spitzbergen’and Beeren Eiland.
Provided the further course of the vessel be unobstructed
by ice. the Expedition will extend its investigations to the
North Coast of Spitzbergen. In this region, probably, the
Polar current alone prevails, and may, therefore, be taken
as a proper boundary for the northern field of exploratory
research.
By pushing on as far as practicable into the Polar
current, i. e. till ice shall bar farther progress, much
valuable material may be collected for prosecuting the
investigation of the protoplasma found in 1877 off the island of
Jan Mayen.
The exploratory work to be done on each cruise
should, it is opined, embrace three intervals, or periods,
the Expedition making, so soon as the investigations allotted
to each shall have been completed, for the nearest
Norwegian port (Hammerfest), to refit the vessel, taking in there
a supply of coal, water, provisions. &c. The Murman Sea
should, it is believed, be the first region explored, the ice
there most probably breaking up somewhat earlier in the
season than is the case with that of the Greenland Sea.
.The trip to Spitzbergen will be deferred till August, gener-
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