A Study of Long-Term Satellite-Tracked Iceberg Drifts in Baffin Bay and Davis Strait

Marko, J.R.; Birch, J.R.; Wilson, Mary Alice B.

doi:10.14430/arctic2322

Cited by 25 publications

(14 citation statements)

References 3 publications

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“…1; Marko et al, 1982;Williams, 1986). Between December and April, Baffin Bay is covered by sea ice, whereas during the rest of the year, drifting icebergs are of ma jor importance (Marko et al, 1982;Williams, 1986; observa tions, Leg 105).…”

Section: Modern Environment In Baffin Bay and Labrador Seamentioning

confidence: 99%

Quantity, Provenance, and Maturity of Organic Matter at ODP Sites 645, 646, and 647: Implications for Reconstruction of Paleoenvironments in Baffin Bay and Labrador Sea during Tertiary and Quaternary Time

Stein¹,

Littke²,

Stax³

et al. 1989

Proceedings of the Ocean Drilling Program

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The quantity and quality of organic carbon of Eocene to Holocene sediments from ODP Sites 645, 646, and 647 were investigated to reconstruct depositional environments. Results were based on organic-carbon and nitrogen deter minations, Rock-Eval pyrolysis, and kerogen microscopy.The sediments at Site 645 in Baffin Bay are characterized by relatively high organic-carbon values, most of which range from 0.5% to almost 3%, with maximum values in the middle Miocene. Distinct maxima of organic-carbon ac cumulation rates occur between 18 and 12.5 Ma and between 3.4 and 0 Ma. At Sites 646 and 647 in the Labrador Sea, organic-carbon contents vary between 0.1% and 0.75%. Cyclic "Milankovitch-type" changes in organic-carbon depo sition imply climate-controlled mechanisms that cause these fluctuations.The composition of organic matter at Site 645 is dominated by terrigenous components throughout the entire sedi ment sequence. An increased content of marine organic carbon was recorded only in the late-middle Miocene. At Sites 646 and 647, the origin of the organic matter most probably is marine.Oceanic paleoproductivity values were estimated, based on the amount of marine organic carbon. During most of the Neogene time interval at Site 645, productivity was low, i.e., similar or less than that measured in Baffin Bay today. Higher values of up to 150 (200) gC • m -2 • y -1 may have occurred only in the Miocene. At Sites 646 and 647, mean paleoproductivity values vary between 90 and 170 gC ■ m -2 • y -1 ; i.e., these are also similar to those measured in the Labrador Sea today. Lower values of 40 to 70 gC • m -2 • y -1 were estimated for the early Eocene and (middle) Mio cene.

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Section: Modern Environment In Baffin Bay and Labrador Seamentioning

confidence: 99%

Quantity, Provenance, and Maturity of Organic Matter at ODP Sites 645, 646, and 647: Implications for Reconstruction of Paleoenvironments in Baffin Bay and Labrador Sea during Tertiary and Quaternary Time

Stein¹,

Littke²,

Stax³

et al. 1989

Proceedings of the Ocean Drilling Program

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“…This cyclonic circulation transports both heat and salt into northern Baffin Bay. The circulation is evident in hydrographic observations (Muench, 1971;Bourke et al, 1989), the tracks of drifting icebergs and buoys Marko et al, 1982) and in long-term measurements of current (Ross, 1990a(Ross, , b, 1991. The Arctic outflow in northwestern Baffin Bay occupies the entire water column (to a depth of 500 m).…”

Section: Introductionmentioning

confidence: 98%

Ocean circulation within the North Water polynya of Baffin Bay

Melling¹,

Gratton²,

2001

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“…Despite the hazard icebergs pose for shipping, and the intensive efforts of the International Ice Patrol to chart iceberg positions in the Labrador Sea since the Titanic disaster in 1912 [St•bing, 1974], relatively little is known about long-term iceberg trajectories and origins. Most synthesising research has focused on the Labrador Sea [Gustajtis and Buckley, 1978;Robe et al, 1980;Marko et al, 1982;Murphy andAnderson, 1985 andEl-Tahan, 1988]. There have been a few attempts to model iceberg drift over short distances [Smith and Banke, 1983;Isaacson and McTaggart, 1990;Smith, 1993], and one for a few hundred kilometres [Loset, 1993], but with relatively limited observational data to validate the models.…”

Section: Introductionmentioning

confidence: 99%

Prediction of iceberg trajectories for the North Atlantic and Arctic oceans

Bigg¹,

Wadley²,

Stevens³

et al. 1996

Geophysical Research Letters

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Icebergs are a well‐known hazard for shipping. Their study also provides information about diverse geophysical processes, as varied as ocean circulation, air‐sea fluxes, calving rates of glaciers or the mass balance of ice sheets. As a first step to obtaining this information from iceberg data we have developed a model of iceberg drift driven by ocean and atmospheric forcing derived from general circulation models. We have applied the drift model to a distribution of typical icebergs released from the main tidewater glaciers of the North Atlantic and Arctic Oceans. We demonstrate that the main driving force of iceberg motion is rooted in the unsteady component of oceanic advection. From simulated trajectories we are able to reproduce the observed southwards limit of iceberg penetration and demonstrate sometimes surprising geographical links between iceberg origin and ultimate melting zones.

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A Study of Long-Term Satellite-Tracked Iceberg Drifts in Baffin Bay and Davis Strait

Cited by 25 publications

References 3 publications

Quantity, Provenance, and Maturity of Organic Matter at ODP Sites 645, 646, and 647: Implications for Reconstruction of Paleoenvironments in Baffin Bay and Labrador Sea during Tertiary and Quaternary Time

Quantity, Provenance, and Maturity of Organic Matter at ODP Sites 645, 646, and 647: Implications for Reconstruction of Paleoenvironments in Baffin Bay and Labrador Sea during Tertiary and Quaternary Time

Ocean circulation within the North Water polynya of Baffin Bay

Prediction of iceberg trajectories for the North Atlantic and Arctic oceans

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