scholarly journals Integrated Taxonomy for Halistemma Species from the Northwest Pacific Ocean

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3283
Author(s):  
Nayeon Park ◽  
Andrey A. Prudkovsky ◽  
Wonchoel Lee
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Kuroshio Extension ◽  
Block Size ◽  
Morphological Type ◽  
Phylogenetic Position ◽  
Northwestern Pacific ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
Distal Process

During a survey of the siphonophore community in the Kuroshio Extension, Northwest Pacific Ocean, a new Halistemma Huxley, 1859 was described using integrated molecular and morphological approaches. The Halistemma isabu sp. nov. nectophore is most closely related morphologically to H. striata Totton, 1965 and H. maculatum Pugh and Baxter, 2014. These species can be differentiated by their nectosac shape, thrust block size, ectodermal cell patches and ridge patterns. The new species’ bracts are divided into two distinct types according to the number of teeth. Type A bracts are more closely related to ventral bracts in H. foliacea (Quoy and Gaimard, 1833) while Type B bracts are more similar to H. rubrum (Vogt, 1852). Each type differs, however, from the proximal end shape, distal process and bracteal canal. Both of the new species’ morphological type and phylogenetic position within the genus Halistemma are supported by phylogenetic analysis of concatenated DNA dataset (mtCOI, 16S rRNA and 18S rRNA). Integrated morphological and molecular approaches to the taxonomy of siphonophores showed a clear delimitation of the new species from the congeners. Halistemma isabu sp. nov. is distributed with the congeners H. rubrum, H. cupulifera, H. foliacea and H. striata in the northwestern Pacific Ocean.

Validation of Satellite-Retrieved CCN based on a Cruise Campaign over the polluted Northwestern Pacific Ocean 

2021 ◽  
Author(s):  
Yichuan Wang ◽  
Yannian Zhu ◽  
Minghuai Wang ◽  
Daniel Rosenfeld ◽  
Yang Gao ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Marine Boundary Layer ◽  
Cloud Condensation Nuclei ◽  
Strong Dependence ◽  
Cloud Base ◽  
Northwestern Pacific ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
Satellite Retrieval ◽  
Microphysical Properties

<p><span>In this study, a methodology for satellite retrieval of cloud condensation nuclei (CCN) in shallow marine boundary layer clouds is presented and validated. This methodology is based on retrieving cloud base drop concentration (N<sub>d</sub>) and updrafts (W<sub>b</sub>), which are used for calculating supersaturation (S). The N<sub>d</sub> is the activated CCN concentration in clouds at a given S. The accuracy of the satellite retrieval is validated against the surface-measured CCN of a cruise campaign over the heavily polluted northwest Pacific Ocean. Clouds which are coupled with the sea surface have good agreement between satellite retrieved N<sub>d</sub> and surface-measured CCN after performing corrections for temperature and adiabatic fraction. This study broadens the applicability of the methodology from aerosol-limited to contaminated regions. The validation shows ±30% accuracy in retrieving CCN of both clean and polluted regions. The results further demonstrate the strong dependence of marine shallow cloud N<sub>d</sub> on CCN number concentrations and updraft, which allows us to further apply this methodology to quantify the relationships between CCN and cloud microphysical properties and reduce the uncertainty of radiation forcing caused by aerosol cloud interaction (ACI).</span></p>

scholarly journals A new Antipathozoanthus species (Cnidaria, Hexacorallia, Zoantharia) from the northwest Pacific Ocean

ZooKeys ◽  
2021 ◽  
Vol 1040 ◽  
pp. 49-64
Author(s):  
Hiroki Kise ◽  
Masami Obuchi ◽  
James Davis Reimer
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Genetic Markers ◽  
Phylogenetic Analyses ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
Exposed Rock ◽  
Molecular Phylogenetic ◽  
The Northwest Pacific Ocean ◽  
A New Species

A new species of zoantharian within the genus Antipathozoanthus is described based on specimens collected from the coast of mainland Japan, northwest Pacific Ocean. Antipathozoanthus tubussp. nov. is characterized by its substrate (epibiotic on polychaete tube) and habitat (exposed rock). As well, the results of molecular phylogenetic analyses using concatenated multiple genetic markers also support the distinction between A. tubussp. nov. and its congenerics. Antipathozoanthus tubussp. nov. is the first species of Antipathozoanthus species reported to be epibiotic on polychaete tubes, and is the second species in the genus that is not associated with antipatharians.

scholarly journals Aerosol iron and aluminum solubility in the northwest Pacific Ocean: Results from the 2002 IOC cruise

2006 ◽  
Vol 7 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Clifton S. Buck ◽  
William M. Landing ◽  
Joseph A. Resing ◽  
Geoffrey T. Lebon
Keyword(s):  
Pacific Ocean ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
The Northwest Pacific Ocean ◽  
Aluminum Solubility
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