By Ruediger Stein (Eds.)
Even though it is mostly approved that the Arctic Ocean is a truly delicate and significant zone for alterations within the international weather, this zone is the final significant physiographic province of the earth whose short-and long term geological historical past is far much less recognized compared to different ocean areas. This lack of know-how is especially as a result of the most important technological/logistic difficulties in achieving this harsh, ice-covered area with common examine vessels and in retrieving lengthy and undisturbed sediment cores. through the the final approximately twenty years, although, numerous foreign and multidisciplinary send expeditions, together with the 1st medical drilling on Lomonosov Ridge in 2004, a break-through in Arctic learn, have been conducted into the significant Artic and its surrounding shelf seas. effects from those expeditions have vastly complicated our wisdom on Arctic Ocean paleoenvironments. released syntheses in regards to the wisdom on Arctic Ocean geology, nonetheless, are in accordance with information to be had sooner than 1990. A accomplished compilation of knowledge on Arctic Ocean paleoenvironment and its short-and long term variability in response to the large volume of recent facts together with the ACEX drilling info, has no longer been on hand but. With this booklet, featuring (1) particular details on glacio-marine sedimentary tactics and geological proxies used for paleoenvironmental reconstructions, and (2) specific geological info on smooth environments, Quaternary variability on diversified time scales in addition to the long term weather historical past in the course of Mesozoic-Tertiary occasions, this hole in wisdom may be crammed. *Aimed at experts and graduates *Presents history learn, contemporary advancements, and destiny trends*Written by means of a number one pupil and professional
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Additional resources for Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment
Norwegian coastal C. Warm current Cold current Irminger C. 8 Surface-water circulation in the Arctic Ocean (from Macdonald, Harner, Fyfe, Loeng, & Weingartner, 2003, supplemented). 8). 3). Through Fram Strait, two major currents, with southward flowing waters on the west and northward flowing waters on the west, exchange water between the Arctic and the North Atlantic: The cold, icetransporting East Greenland Current is the main current out of the Arctic Ocean. In contrast, the eastern WSC, an extension of the North Atlantic-Norwegian Current, carries warm, relatively saline water into the Arctic Ocean (see earlier).
A number of hypotheses have been forwarded to explain the origin of the Alpha–Mendeleev Ridge, such as this ridge may be: (1) of continental origin; (2) a former spreading centre; or (3) a result of ‘hotspot’ activity ( Jokat, 2003 and further references therein). 10 Main geological structures of the Arctic Ocean and surrounding continents. Dotted areas in the central part of the ¢gure indicate oceanic basins deeper than 2,000 m. The active spreading centre is shown as double line. On the continents, shields, platforms, and orogenic belts are indicated as crosses, horizontally hatched, and dashed lines, respectively.
3) are coordinated research activities under the umbrella of the IPY 2007/2008. Multidisciplinary studies of the data and sediment material collected during these ship expeditions have greatly advanced (and will further advance) our knowledge on Arctic Ocean palaeoenvironment and its variability through Quaternary times. 3. 3. Drilling in the High Northern Latitudes Because gravity and piston coring is restricted to the uppermost metres of the sediment cover mainly representing the Quaternary, the knowledge about the early Arctic Ocean history remained fragmentary over the past decades (see Chapter 7 for more details).