Polynya Research Articles

Corrigendum to "A combined approach of remote sensing and airborne electromagnetics to determine the volume of polynya sea ice in the Laptev Sea" published in The Cryosphere, 7, 947−959, 2013

Corrigendum to "A combined approach of remote sensing and airborne electromagnetics to determine the volume of polynya sea ice in the Laptev Sea" published in The Cryosphere, 7, 947−959, 2013

Research on Distributed Sharing of Polar Sea Ice-Ocean Parameters Remote Sensing Inversion Models

Traditional single computing environment cannot meet the needs of geographic model sharing,because of its limitations on storage,computing resources and program transfer.Distributed geospatial model sharing could avoid those limitations,so distributed sharing architecture of remote sensing inversion models for polar sea ice-ocean parameters is brought forward based on SOA construction and OGC specifications,which can provide the overall framework and the top-level guidance for studying the key technologies of polar sea ice-ocean parameters remote sensing inversion model service composition and constructing specific composition applications.The distributed sharing architecture focuses on the model services.Detail discussion is carried out on model service interface and interoperation problems related to model services.The polar sea ice-ocean parameters remote sensing inversion model sharing services platform is designed and developed to help implementing polar sea ice-ocean parameters remote sensing inversion model sharing.In this paper,we analyzed the design guidelines of polar sea ice-ocean parameters remote sensing inversion model sharing service platform,and further studied the key technologies involved in the polar sea ice-ocean parameters remote sensing inversion model sharing service platform.The sharing platform is the connector of model and the clients,and can realize the data conversion and function collaborative.With the help of the sharing platform,model developer could only focus on model algorithm,and the sharing platform will take care of building model service,and interacting with model clients.Several models are adapted,including sea ice concentration remote sensing inversion model and polynya morphologic remote sensing inversion model,to demonstrate the advantages of distributed sharing architecture of polar sea ice-ocean parameters remote sensing inversion models.

Synthesis and Characterisation of Colorants Derived from 1,4-Diamino Anthraquinone Polyamides

In this study, the polycondensation products of a diamine anthraquinone (1,4-diamino anthraquinone) and some aliphatic diacids with different methylene numbers were synthesised. Their UV-visible spectroscopy and thermal properties were then characterised. The synthesis was achieved by reacting equimolar solutions of the amine and the acid halides. The structure and thermal properties of the products were characterised. FT-IR Spectra of all the three products revealed the formation of amide due to the presence of strong bands at 1565 and 3390 cm?1 assignable to C=O stretching and N-H vibrations. Differential Scanning Calorimetry revealed high melting exotherms for the products. Thermogravimetry revealed moderate thermal stabilities for Poly NAM and Poly NAS and low thermal stability for Poly NAA which indicated 5.9%, 7.1% and 61.2% weight losses at 285℃, 285℃ and 374℃ for the three products respectively. The wavelengths of maximum absorbance for the dye samples are 601.5, 591 and 589 nm respectively with absorptivity coefficients (a1cm1% ) of 11640000, 11610000 and 11560000 respectively.

Isotopic Investigations of Seabirds of the North Water Polynya: Contrasting Trophic Relationships Between the Eastern and Western Sectors

Abstract We used δ15N and δ13C analyses of blood, muscle, and liver tissues to evaluate similarity of diet among five seabird species: Black Guillemot (Cepphus grylle), Black-legged Kittiwake (Rissa tridactyla), Dovekie (Alle alle), Glaucous Gull (Larus hyperboreus), and Thick-billed Murre (Uria lomvia) nesting at Coburg Island on the west and Hakluyt Island on the east side of the North Water Polynya between Ellesmere Island, Canada, and northwest Greenland. We hypothesized that dietary differences should occur because the two neighboring sites are subject to different oceanographic conditions, one result of which is differential timing of spring open water. Relative trophic level, derived from tissue δ15N values, ranged from 3.6 for Dovekie from Hakluyt Island to 4.7 for late-breeding-season diets of Thick-billed Murre adults from Coburg Island. At Coburg Island, trophic level of hatching year (HY) kittiwakes, murres, and Glaucous Gulls was higher than that for adults. This pattern was not found at Hakluyt Island, where chicks of all species generally occupied lower trophic positions. These findings suggest that lower-trophic-level prey were more important to Hakluyt Island seabirds, possibly due to lower availability of arctic cod (Boreogadus saida). Investigaciones Isotópicas de Aves Marinas en el Canal Aguas del Norte: Contrastando las Relaciones Tróficas entre los Sectores Este y Oeste Resumen. Usamos análisis de δ15N y δ13C en tejidos sanguineos, musculares y hepáticos para evaluar la similitud en la dieta entre cinco especies de aves marinas (Cepphus grylle, Rissa tridactyla, Alle alle, Larus hyperboreus y Uria lomvia). Estas especies anidan en la Isla Coburg en el lado oeste y en la Isla Hakluyt en el lado este del Canal de las Aguas del Norte, que se presenta libre de hielos y está situado entre la Isla Ellesmere en Canadá y el noroeste de Groenlandia. Hipotetizamos que las diferencias en la dieta se deberían a que los dos sitios vecinos están sujetos a diferentes condiciones oceanográficas, resultando en un ajuste temporal diferencial en la apertura de las aguas en primavera. El nivel trófico relativo, derivado de los valores de δ15N en los tejidos, fluctuó entre 3.6 para A. alle de la Isla Hakluyt hasta 4.7 para la dieta del final de la época reproductiva de adultos de U. lomvia de la Isla Coburg. En la Isla Coburg, el nivel trófico de individuos de R. tridactyla, U. lomvia y L. hyperboreus que eclosionaron ese año fue mayor que el nivel de los adultos. No encontramos este patrón en la Isla Hakluyt, donde los pichones de todas las especies generalmente ocuparon posiciones tróficas inferiores. Estos resultados sugieren que las presas de niveles tróficos inferiores fueron más importantes para las aves marinas de la Isla Hakluyt, posiblemente debido a una menor disponibilidad de bacalao del Ártico (Boreogadus saida).

Physical processes within the North Water (NOW) polynya

(2001). Physical processes within the North Water (NOW) polynya. Atmosphere-Ocean: Vol. 39, No. 3, pp. 163-166.

A.Yu. Gukov was here [about the book by A.Yu. Gukov EntitledEkosistema Sibirskoi polyn'i (the ecosystem of the Syberian polynya), Moscow: Nauchnyi Mir, 1999

A.Yu. Gukov was here [about the book by A.Yu. Gukov EntitledEkosistema Sibirskoi polyn'i (the ecosystem of the Syberian polynya), Moscow: Nauchnyi Mir, 1999

Experience in freezing a polynya

Experience in freezing a polynya

Polynas Surrounded by Ice and Mystery

Polynas Surrounded by Ice and Mystery