Primary production associated with sea ice at Godhavn, Disko, west Greenland

by Ole G. Norden Andersen

Publisher: s.n. in [Denmark

Written in English
Published: Pages: 220 Downloads: 989
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Subjects:

  • Algae -- Greenland -- Godhavn,
  • Glaciology.

About the Edition

Primary production, distribution and survival of unicellular algae living in and adjacent to sea ice. Field work in 1975 and 1976.

Edition Notes

Reprint from: Ophelia, vol. 16, no. 2, 1977.

StatementOle G. Norden Andersen.
SeriesPublications from the Danish Arctic Station on Disko Island, Greenland -- no. 67, Ophelia -- v. 16, no. 2
The Physical Object
Paginationp. 205-220 :
Number of Pages220
ID Numbers
Open LibraryOL19864232M

Influence of sea ice on primary production in the Southern Ocean: A satellite perspective Walker O. Smith Jr.1 and Josefino C. Comiso2 Received 30 March ; revised 8 November ; accepted 26 February ; published 23 May [1] Sea ice in the Southern Ocean is .   The Greenland Ice Sheet is the second-largest body of ice in the world, covering roughly , square miles of Greenland's surface. If it melts completely, it could contribute up to 23 feet (7 meters) of sea level rise, according to a new study using data from NASA's Operation IceBridge. Varied Ice Shapes along the Greenland Coast. Acquired Ma , this natural-color image shows part of the southeastern coast of Greenland, fringed by multiple forms of sea ice: fast ice, multiyear ice fragments, and small pieces of ice shaped into swirls by currents. Image of the Day Water Snow and Ice. Contact us. Postbox Kussangajaannguaq 11 Ilulissat - Greenland Email: [email protected] Phone: + 94 53

The Arctic Ocean includes the North Pole region in the middle of the Northern Hemisphere, and extends south to about 60°N. The Arctic Ocean is surrounded by Eurasia and North America, and the borders follow topographic features; the Bering Strait on the Pacific side, and the Greenland Scotland Ridge on the Atlantic is mostly covered by sea ice throughout the year and almost completely. The Greenland Sea is a body of water that borders Greenland to the west, the Svalbard archipelago to the east, Fram Strait and the Arctic Ocean to the north, and the Norwegian Sea and Iceland to the south. The Greenland Sea is often defined as part of the Arctic Ocean, sometimes as part of the Atlantic Ocean. However, definitions of the Arctic Ocean and its seas tend to be imprecise or arbitrary. The Influence of Sea Ice on Primary Production in the Southern Ocean: A Satellite Perspective Sea ice in the Southern Ocean is a major controlling factor on phytoplankton productivity and growth, but the relationship is modified by regional differences in atmospheric and oceanographic conditions. We used the phytoplankton biomass (binned at 7-day intervals), PAR and cloud cover data from.   The swirls of ice are caused by winds and currents that steer the ice around the sea. Sea ice in the Arctic Ocean and surrounding seas is now approaching its annual minimum extent, which typically occurs in September. In , as in several recent years, the Greenland Sea has seen less ice and thinner ice passing through its waters. Walt Meier.

  Ice-penetrating radar revealed an extensive, ancient river drainage system on the landscape beneath Greenland’s massive Jakobshavn Glacier. A .  , Sea-ice algae: Major contributors to primary production and algal biomass in the Chukchi and Beaufort Seas during May/June Deep Sea Res. II 56, (). doi: / Over the past 20 years, the study of the frozen Arctic and Southern Oceans and the subarctic seas has progressed at a remarkable pace. This third edition of Sea Ice gives an insight into the very latest understanding of how sea ice is formed, how we measure (and model) its extent, the biology that lives within and is associated with sea ice, and the effect of climate change on its distribution. A research project to assess the status of 27 species of marine mammals and five species of sea turtles in Indian waters has been launched by the Central Marine Fisheries Research Institute (India). Kate Stafford has shared with the new initiative her experience using acoustic sensing technologies in marine mammal stock assessments. 13 Aug

Primary production associated with sea ice at Godhavn, Disko, west Greenland by Ole G. Norden Andersen Download PDF EPUB FB2

Book Editor(s): Milton O. Lee. Search for more papers by this author Enrique F. Mandelli, Primary Production and Standing Crop of Phytoplankton in the Weddell Sea and Drake Passage, Biology of the Antarctic Seas II, Primary production associated with sea ice at Godhavn, Disko, West Greenland, Ophelia, /, 16 Cited by: This work quantifies the spatial and temporal trends in sea ice concentration, formation, and break-up and the magnitude and distribution of primary and secondary production in coastal and offshore waters of Greenland.

The work is primarily conducted using time-series of remotely sensed satellite observations supplemented with in situ sampling. Klaus M. Meiners, Christine Michel, Dynamics of nutrients, dissolved organic matter and exopolymers in sea ice, Sea Ice, /, (), ().

Wiley Online LibraryCited by: During the spring of we occupied a station on annual sea ice located several kilometers from Disko Island, West Greenland in water depths greater than m.

Griet Neukermans, Rick A. Reynolds, Dariusz Stramski, Contrasting inherent optical properties and particle characteristics between an under-ice phytoplankton bloom and open water in the Chukchi Sea, Deep Sea Research Part II: Topical Studies in Oceanography, /,(59 Cited by: Ice algae samples were collected from the winter pack ice off Labrador during March The population was dominated by centric diatoms.

Chlorophyll concentrations ranged from 40 to mg m−3, and particulate organic carbon from 2 to 10 g m−3. Assimilation numbers for the ice algae ranged from to mg C (mg chl)−1 h−1 with a mean ofand were not significantly different.

Primary production associated with sea ice at Godhavn, Disko, West Disko Ole G. Norden Andersen; Ophelia () Measurements of ATP and organic carbon in.

Using data that have become available during the last ten years we have reestimated the annual production by phytoplankton in the arctic marine ecosystem. The new figure is some sixteen times Primary production associated with sea ice at Godhavn than an estimate made in This is of considerable significance regionally, but still does not, of itself, imply that global phytoplankton production is underestimated at present.

The relationship between ice concentration and estimated annual primary productivity from – in (a) Ross Sea I, (b) Ross Sea II, (c) West Antarctic Peninsula, and (d) Weddell Sea. [28] One of the more striking results of this work is the marked and significant increase in primary productivity of the entire Southern Ocean (Figure 9a).

"Thus, I unconditionally recommend this book to the serious student of climate change as well as to the more experienced researcher involved in any aspect of sea ice research as a most valuable resource on the subject of sea ice and its role in the global system." (Polar Biol, ).

Contents of the book include details of the growth, microstructure and properties of sea ice, large-scale variations in thickness and characteristics, its primary production, micro-and macrobiology, sea ice as a habitat for birds and mammals, sea ice biogeochemistry, particulate flux, and the distribution and significance of palaeo sea ice.

Sea. Alterations in sea ice and primary production are expected to have cascading influences on the food web in high Arctic marine ecosystems. This study spanned four years and examined the spring phytoplankton production bloom in Disko Bay, West Greenland (69°N, 53°W) (using chlorophyll a concentrations as a proxy) under contrasting sea ice conditions in and (heavy sea ice).

O.G.N. AndersenPrimary production associated with sea ice at Godhavn, Disko, West Greenland Ophelia, 16 (), pp. View Record in Scopus Google Scholar. Past sea ice conditions and open water phytoplankton production were reconstructed from a sediment core taken in Disko Bugt, West Greenland, using the sea ice biomarker IP25 and other specific.

Sea ice, which covers up to 7% of the planet’s surface, is a major component of the world’s oceans, partly driving ocean circulation and global climate patterns. It provides a habitat for a rich diversity of marine organisms, and is an extremely valuable source of information in studies of global climate change and the evolution of present day life forms.

Primary production associated with sea ice at Godhavn, Disko, West Greenland A simple surface operated 14C method for measuring primary production by bottom type ice algae was tested at.

The variation in sea ice conditions along Greenland's west coast was characterized on the basis of sea ice concentration data in obtained from passive microwave imagery processed with the Enhanced NASA Team algorithm (Markus & Cavalieri, ) and archived and distributed by the National Snow and Ice Data Center (Cavalieri et al., ).

The chlorophyll a biomass and species composition of ice algae and phytoplankton were investigated in the late ice-covered season, late February to mid-Aprilat a fixed station in Notoro Ko.

The Greenland Ice Sheet holds m of sea level equivalent and in recent decades, rising temperatures have led to accelerated mass loss. Current ice margin recession is led by the retreat of outlet glaciers, large rivers of ice ending in narrow fjords that drain the interior.

We pair an outlet glacier–resolving ice sheet model with a comprehensive uncertainty quantification to estimate. Assuming that the density of the ice is kg m −3, for an average density of sea water of 1, kg m −3, and assuming that Gt of ice contributes to 1 mm of global eustatic sea level rise, this new map suggests that the Greenland ice sheet has a total sea level rise potential of ± m, which is 7 cm larger than stated by.

ANDERSEN O. () Primary production associated with sea ice at Godhavn, Disko, West Greenland. Ophelia, 16, BRA3"eAIG. and I. DUNDAS () Bacterial dry matter content and biomass estimations. Integrated primary production over 7 mo was g Cm-2 in sea ice and g C m(-2) in the water column, with the vast majority of the pelagic production occurring just after sea ice melt (when.

The calving front of Kangerdlugssup Glacier in central west Greenland where icebergs are born. You can see several large ice bergs in the fjord on the right surrounded by the so called mélange, which is a dense mix of bergy bits and sea ice floating in the fjord.

Ackley, S.A. and Sullivan, S.W. Physical controls on the development and characteristics of Antarctic sea ice biological communities–a review and synthesis. Deep Sea Resea – Google Scholar | Crossref. Ilulissat (Jakobshavn) Isbrae and Sermeq lie imme- diately to the east of Disko and are major sources of icebergs on the West Greenland coast, contribut- ing bergs of water content about 26 and 18 kn^/a, respectively, or about 14% of the estimated total berg production in Greenland.

sition (Figure 2) further suppress primary production in the iron-limited portions of the basin. [15] The South Pacific exhibited a reduction of Pg C y 1 in primary production (Figure 2), which represented a 14% basin-wide decline (Table 1).

This reduction corresponded with a decrease of nearly 35% in atmospheric iron deposition. But until the s, the ice in Greenland was remarkably stable, even as air temperatures rose because of human-caused climate change.

Each year, the ice sheet lost some weight as ice. Driftwood entry to northern Greenland was rare until cal. years BP, indicating more severe summer sea-ice conditions than at present. More open water than at present probably characterized the period between and cal. years BP, during which time driftwood stranded on the beaches of Nioghalvfjerdsfjorden that is now covered by a.

The ice sheet covering Greenland is four times bigger than California—and holds enough water to raise global sea-level more than twenty feet if most of it were to melt.

Today, sea levels are. Ask them to specify if the ice is on land or at sea. (The Greenland and Antarctic ice sheets, along with smaller mountain glaciers, are considered land ice. The ice in the Arctic is frozen seawater and therefore considered sea ice.) Ask students which type of ice, if any, contributes more to sea-level rise.

Ask students to explain their thinking. Greenland is the biggest island on Earth, and it's covered by a thick ice sheet. Scientists are growing extremely concerned that global warming is melting the ice too quickly.The Greenland Ice Sheet holds m of sea level equivalent and in recent decades, rising temperatures have led to accelerated mass loss.

Current ice margin recession is led by the retreat of outlet glaciers, large rivers of ice ending in narrow fjords that drain the interior. We pair an outlet glacier–resolving ice sheet model with a com. The marine environment in Greenland is vast and diverse, stretching from the high Arctic Polar Basin at 84°N to the western North Atlantic at 58°N where relatively warm water from the Irminger current has a profound and’s marine environment includes three large marine ecosystems (LMEs) (Skjoldal & Sherman, ), and therefore, assessing the status of the marine environment in.