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1 edition of Temperature fine structure near the sea-ice margin of the Chukchi Sea found in the catalog.

Temperature fine structure near the sea-ice margin of the Chukchi Sea

Robert G. Paquette

Temperature fine structure near the sea-ice margin of the Chukchi Sea

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  • 23 Currently reading

Published by Naval Postgraduate School in Monterey, Calif .
Written in English

    Subjects:
  • Ocean temperature,
  • Salinity,
  • Oceanography,
  • Research

  • About the Edition

    Temperature fine structure with peak-to-peak fluctuations often exceeding 2[degrees]C is prevalent throughout the marginal sea-ice zone of the shallow Chukchi Sea in midsummer. It is normally found within 20-35 km outside of the ice and seldom farther than 5-10 km inside the ice margin. It has also been infrequently found more than 100 km south of the ice. Temperature and salinity fronts of all degrees of sharpness occur in the same general area, but the two types need not be coincident. Considerable variability in time and length scales of fine structure elements has been noted with persistences ranging from 2 hours or less to more than 20 hours and length scales ranging from 600 m to more than 20 km. While much of this variability is intrinsic, part can be accounted for by the inability to sample in the direction of flow and the relative motion between the sampling platform and fine structure element. Fine structure lenses are considerably longer parallel to the ice edge with similarity in temperature structure noted over distances of 80 to 100 km. (Author).

    Edition Notes

    StatementRobert G. Paquette and Robert H. Bourke
    ContributionsBourke, Robert H., Naval Postgraduate School (U.S.)
    The Physical Object
    Pagination[18] p. :
    Number of Pages18
    ID Numbers
    Open LibraryOL25506162M
    OCLC/WorldCa368172854

      A female polar bear stands with three yearlings in the Arctic’s Chukchi Sea. (Photograph courtesy U.S. Fish and Wildlife Service) A recent study found that the condition of polar bears in the Arctic’s Chukchi Sea has remained stable despite sea ice loss, while the condition of another population in the Beaufort Sea has declined. Polar bears in the Chukchi Sea relied heavily on sea ice habitats with greater than 45% of adult females in the subpopulation spending 95% or more of their time on the sea ice (n = ). Land, however, was also necessary for critical life history functions, with >84% of denning of this subpopulation occurring on land (n = 70).Cited by:   Polar bears' use of land during substantial summer sea ice loss in the Chukchi Sea increased by 30 days, according to a study published Novem in the open-access journal PLOS ONE by.


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Temperature fine structure near the sea-ice margin of the Chukchi Sea by Robert G. Paquette Download PDF EPUB FB2

Temperature fine structure with peak‐to‐peak fluctuations often exceeding 2°C is prevalent throughout the marginal sea‐ice zone of the shallow Chukchi Sea in midsummer. It is normally found within 20–35 km outside of the ice and seldom farther than 5–10 km inside the ice margin.

It has also been infrequently found more than km south of the by: Temperature fine structure with peak-to-peak fluctuations often exceeding 2°C is prevalent throughout the marginal sea-ice zone of the shallow Chukchi Sea in midsummer.

It is normally found within km outside of the ice and seldom farther than km inside the ice margin. It has also been infrequently found more than km south of the ice.

Temperature fine structure with peak-to-peak fluctuations often exceeding 2°C is prevalent throughout the marginal sea-ice zone of the shallow Chukchi Sea in midsummer.

It is normally found within km outside of the ice and seldom farther than km inside the ice margin. Temperature fine structure near the sea-ice margin of the Chukchi Sea / By Robert G.

Paquette, Topics: Arctic Ocean, Chukchi Sea, Ocean temperature. Temperature fine structure with peak-to-peak fluctuations often exceeding 2°C is prevalent throughout the marginal sea-ice zone of the shallow Chukchi Sea in midsummer. It is normally found within km outside of the ice and seldom farther than km inside the ice : Robert G Paquette and Robert H.

Bourke. Temperature fine structure near the sea-ice margin of the Chukchi Sea. Journal of Geophysical Research, 84(C3): – Paquette, R. and Bourke, R.

Ocean circulation and fronts as related to ice melt-back in the Chukchi by: 4. Re-Analysis (ERA). The merged product provides monthly mean sea surface temperature and sea ice concentration data from to the present: it is updated monthly, and it is freely available for community use.

The merging procedure was designed to take full advantage of Temperature fine structure near the sea-ice margin of the Chukchi Sea book higher-resolution SST information inherent in the NOAA OI.v2. Carmack, E. () Silicate and potential temperature in the deep and bottom waters of the western Wed dell Sea.

Deep-Sea Res., – Google ScholarCited by: The seasonal sea ice zone is defined as the area between the minimum and maximum seasonal ice limits plus the region of the ice margin that is significantly affected by the ice-ocean boundary.

This definition includes almost all of the Antarctic ice cover, the ice in the marginal seas around the Arctic and the ice cover overlying the shelves of Cited by: Warm Temperatures In The Western U.S.; Well Below Normal for the Eastern U.S.

Above average temperatures are expected across the western third of the U.S. and into Alaska through Monday.

Well below average temperatures with widespread near or record low temperatures are likely across the Eastern, Central and Southern U.S. into Tuesday. Read More >. At or near the sea-ice margin the layering gradually disappears with modification of isopycnals and isotherms extending to the bottom.

Large scale temperature fluctuations of to 2 C, termed mesostructure, were observed at m depth in the first three crossings, but were weak or absent in the other crossings. Temperature fine structure with peak-to-peak fluctuations often exceeding 2°C is prevalent throughout the marginal sea-ice zone of the shallow chukchi Sea in midsummer.

Physical and morphological properties of sea ice in the Chukchi and western Beaufort seas were measured during the and June-July ICESCAPE (Impacts of.

Plots and Statistical Summaries for Near-Surface, Mid-Depth and Near-Bottom Measurement Levels 52 Summary of Ocean Currents 64 Bottom Temperatures, Salinty and Density 65 Meteorological Data 71 Other Ice Data Sets 72 Data Archive 73 4 Analysis Results 74 Overview of Sea Ice Conditions in Physical and morphological properties of sea ice in the Chukchi and western Beaufort seas were measured during the and June−July ICESCAPE (Impacts of Climate on the Eco-Systems and Chemistry of the Arctic Pacific Environment) missions aboard the USCGC ations of ice conditions, including ice thicknesses, types, and concentrations of Cited by: 4.

Sea-ice thickness in the coastal northeastern Chukchi Sea from moored ice-profiling sonar YASUSHI FUKAMACHI,1,2,3 DAISUKE SIMIZU,1,4 KAY I.

OHSHIMA,1,2 HAJO EICKEN,5 ANDREW R. MAHONEY,2,3,6 KATSUSHI IWAMOTO,4,7,8 ERIKA MORIYA,9,10 SOHEY NIHASHI11 1Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan.

Temperature fine structure near the sea-ice margin of the Chukchi Sea / View Metadata By: Paquette, Robert G. - Bourke, Robert H. - Naval Postgraduate School (U.S.). Air–sea CO 2 exchange of beach and near-coastal waters of the Chukchi Sea near Barrow, Alaska.

further increases in SWT may result in a source of CO 2 from the coastal margin of Chukchi Sea in mid-summer. Table 1. The coastal waters of the Chukchi Sea were characterized by extremely low pCO 2 in the presence of landfast ice by: 3. Temperature, Salinity and Density 58 Meteorological Data 64 Other Ice Data Sets 66 Project Archive 66 4 Analysis Results 67 Overview of Sea Ice Conditions in 67 Freeze-up Patterns: Fall 68 Break-up Patterns: Summer 72 Ice Draft Statistics 76 Ice Keel Statistics The Chukchi margin is one of the most sensitive high-latitude areas to both climate variability and sea-level fluctuations.

It is in the Chukchi Sea and adjacent areas of the Arctic Ocean that vast expanses of open water now replace summer sea ice at accelerating rates (Fig. Spring breakup of sea ice on the Chukchi Sea. The sea has an approximate area ofkm 2 (, sq mi) and is only navigable about four months of the year.

The main geological feature of the Chukchi Sea bottom is the kilometre-long ( mi) Hope Basin, which is bound to the northeast by the Herald Arch. Depths less than 50 meters ( ft) occupy 56% of Basin countries: Russia, United States.

Arctic Sea Ice Hits Record Lows Off Alaska While ice is growing in some parts of the Arctic, a mix of warm Pacific water and fierce storms has stunted the sea ice off Alaska and damaged coastal towns. Sea ice this spring in the Chukchi Sea, off northwest Alaska, is breaking up and melting earlier and much more extensively than is typical for May.

While small areas of open water in this region during mid-May are normal, it appears to be unprecedented in the satellite era to have this much open water north of 68°N latitude (Point Hope) at. Chukchi Sea, also spelled Chukchee, Russian Chukotskoye More, part of the Arctic Ocean, bounded by Wrangel Island (west), northeastern Siberia and northwestern Alaska (south), the Beaufort Sea (east), and the Arctic continental slope (north).

It has an area ofsquare miles (, square km) and an average depth of feet (77 m). The sea is navigable.

The oceanographic cruise of the USCGC Glacier to the marginal sea-ice zone of the Chukchi Sea--MIZPAC Interim report for period July May [Paquette, Robert G] on *FREE* shipping on qualifying offers.

The oceanographic cruise of the USCGC Glacier to the marginal sea-ice zone of the Chukchi Sea--MIZPAC Interim report for. Where the sea ice forms first If a same air temperature model is taken as an assumption, the sea ice forms first in the bays, near the coast, in calm waters, in shallow waters and where the salinity is low (or in fresh water).

As mentioned above, the water cold down is a critical step into sea ice formation. This isFile Size: KB. Polar oceanography Gordon, Temperature fine structure near the sea‐ice margin of the Chukchi Sea. Ocean circulation and fronts as related to ice melt‐back in the Chukchi Sea. Paquette, Paquette; Bourke, Bourke.

Mesoscale thermal structure of the Polar Front Zone in Drake Passage during the austral summer of Abstract. Sea surface temperature (SST) data from the Chukchi and northern Bering seas beginning in the s are analyzed to investigate low-frequency variability.

Although surface air temperatures at Nome, AK, and adjacent weather stations show a shift in the late s and aFile Size: 3MB. Ask a Climatologist: Chukchi Sea ice at record low Novem by Annie Feidt, Alaska’s Energy Desk The Chukchi Sea should be almost fully covered in sea ice by now.

(Credit: Jannelle Trowbridge, USGS. Public domain.) Thumbnail Medium Original. Detailed Description. Sea ice in the Chukchi Sea. Details. Covering more than seven percent of the earth’s surface, sea ice is crucial to the functioning of the biosphere—and is a key component in our attempts to understand and combat climate change.

With On Sea Ice, geophysicist W. Weeks delivers a natural history of sea ice, a fully comprehensive and up-to-date account of our knowledge of its creation, change, and.

The Chukchi Sea should be almost fully covered in sea ice by now. Instead, it’s mostly open water. Brian Brettschneider, with our Ask a Climatologist segment, says the ice coverage right now in.

Only the top layer of water needs to cool to the freezing point. Convection of the surface layer involves the top – m (– ft), down to the pycnocline of increased density. In calm water, the first sea ice to form on the surface is a skim of separate crystals which initially are in the form of tiny discs.

Over the past 20 years the study of the frozen Arctic and Southern Oceans and sub-arctic seas has progressed at a remarkable pace.

This third edition of Sea Ice gives insight into the very latest understanding of the how sea ice is formed, how we measure (and model) its extent, the biology that lives within and associated with sea ice and the effect of climate change on its : Wiley-Interscience.

Key words: circulation, sea ice, fast ice, Beaufort Sea, coupled ice-oceanmodel 1 Introduction The Chukchi and Beaufort Seas include the vast Chukchi Sea shelf (=50 m depth), and the Beaufort Sea shelf and its extension to the basin (see Fig. The physical oceanography of the Chukchi and Beaufort Seas is featured by seasonal to perennial sea.

Temperature-Salinity plot in Figure 2, the Chukchi Sea consisted mostly of winter water during the late-spring cruise. Winter water is defined as water with temperatures colder than oC and salinity greater than Winter water has a high nutrient content and is therefore conducive for phytoplankton growth.

Conclusions. Douglas, D.C.,Arctic sea ice decline: Projected changes in timing and extent of sea ice in the Bering and Chukchi Seas: U.S. Geological Survey Open-File Report32 p.

Contents Abstract. Projection: In freeze onset on the Chukchi Sea continental shelf northwest of Icy Cape will begin near the end of November to the first week of is ~36 days later than the long-term mean ().

The metric is defined by sea-ice concentration reaching 30% as determined by passive microwave observation in the reference area shown in Fig.

1 (after. Beyond the Sea of Ice is the first book in a prehistoric series by William Sarabande. As the first book, it is of course where you should start reading, as it introduces all of the characters.

Lonit, Torka, and Torka's old father (Umak, who is 45 and considered old by the prehistoric standards) are the only survivors of a tribe who encountered 4/5.

Arctic sea ice extent for April was near average for the month in the satellite record, but was the highest since Including the yearthe linear rate of decline for April ice extent over the satellite record is % per decade.

The Chukchi Sea bloom occurred in late August to early September, accompanying the sea ice retreat or the increase of temperature. 3) Along the Chukchi shelf section A during August, nutrient-rich water was located on the bottom, and maximum chl -a was located at the subsurface, as captured by the model in general.Ip A Molecular Proxy of Sea-ice Duration in the Bering and Chukchi Seas concentrations in the Chukchi Sea compared to in the Bering Sea.

IP 25 concentrations are compared with data for several sea surface conditions: mean annual sea-ice duration, sea surface temperature and salinity, and insolation data.

An.Sea temperature depends on the amount of solar radiation falling on its surface. In the tropics, with the sun nearly overhead, the temperature of the surface layers can rise to over 30 °C (86 °F) while near the poles the temperature in equilibrium with the sea ice is about −2 °C (28 °F).