1,723,101 research outputs found
Intrinsic variability of the Antarctic Circumpolar Current System: low- and high-frequency fluctuations of the Argentine Basin flow
No full textIn this paper, the variability of the Antarctic
Circumpolar Current system produced by purely intrinsic
nonlinear oceanic mechanisms is studied through a sigmacoordinate
ocean model, implemented in a large portion of
the Southern Ocean at an eddy-permitting resolution under
steady surface heat and momentum fluxes. The mean transport
through the Drake Passage and the structure of the main
Antarctic Circumpolar Current fronts are well reproduced
by the model. Intrinsic variability is found to be particularly
intense in the Subantarctic Front and in the Argentine
Basin, on which further analysis is focused. The lowfrequency
variability at interannual timescales is related to
bimodal behavior of the Zapiola Anticyclone, with transitions
between a strong and collapsed anticyclonic circulation
in substantial agreement with altimeter observations. Variability
on smaller timescales shows clear evidence of topographic
Rossby-wave propagation along the eastern and
southern flanks of the Zapiola Rise and of mesoscale eddies,
also in agreement with altimeter observations. The analysis
of the relationship between the low- and high-frequency variability
suggests possible mechanisms of mutual interaction
Glorichlamys Dijkstra 1991
No full textGenus Glorichlamys Dijkstra, 1991 Glorichlamys Dijkstra, 1991: 45. Type species (OD): Pecten elegantissimus Deshayes, 1863; Recent, Rèunion Is.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 279, DOI: 10.5281/zenodo.791044
Pedum Lamarck 1799
No full textGenus Pedum Lamarck, 1799 Pedum [Bruguière] Lamarck, 1799: 88. Type species (M): Ostrea spondyloidea Gmelin, 1791 (SD by Schmidt 1818); Recent, ‘India’.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 293, DOI: 10.5281/zenodo.791044
Gloripallium Iredale 1939
No full textGenus Gloripallium Iredale, 1939 Gloripallium Iredale, 1939: 357. Type species (OD): Ostrea pallium Linnaeus, 1758; Recent, Indo-West Pacific.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 280, DOI: 10.5281/zenodo.791044
Pecten Muller 1776
No full textGenus Pecten Müller, 1776 Pecten Müller, 1776: 248. Type species (SD Schmidt 1818): Ostrea maxima Linnaeus, 1758; Recent, eastern Atlantic.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 285, DOI: 10.5281/zenodo.791044
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Haumea Dall, Bartsch & Rehder 1938
No full textGenus Haumea Dall, Bartsch & Rehder, 1938 Haumea Dall, Bartsch & Rehder, 1938: 86. Type species (OD): Haumea juddi Dall, Bartsch & Rehder, 1938 (= Pecten loxoides G B. Sowerby 2nd, 1882); Recent, Hawaii Islands, 7– 15 m.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 31
Cryptopecten Dall, Bartsch & Rehder 1938
No full textGenus Cryptopecten Dall, Bartsch & Rehder, 1938 Cryptopecten Dall, Bartsch & Rehder, 1938: 84, 93. Type species (OD): Cryptopecten alli Dall, Bartsch & Rehder, 1938 [= Pecten (Chlamys) bullatus Dautzenberg & Bavay, 1912]; Recent, Hawaii.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 309, DOI: 10.5281/zenodo.791044
Figs 46–48. Aequipecten commutatus peripheralis subsp. n. 46–47. Holotype, NMSA E8964, off Matigulu R in The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea)
No full textFigs 46–48. Aequipecten commutatus peripheralis subsp. n. 46–47. Holotype, NMSA E8964, off Matigulu R., Zululand, 200–220 m, 19.4 x 18.4 mm. 46. LV exterior. 47. LV interior. 48. Paratype, NMSA E8964, same loc., 19.4 x 18.3 mm, RV interior.Published as part of Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), pp. 263-321 in African Invertebrates 42 on page 308, DOI: 10.5281/zenodo.791044
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