Deep-sea Research Part Ii-topical Studies in Oceanography最新文献

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Freshwater runoff on the east Greenland shelf 东格陵兰大陆架的淡水径流
IF 2.3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-07-20 DOI: 10.1016/j.dsr2.2024.105402
Robert W. Helber, Scott R. Smith, Gleb Panteleev, Jay F. Shriver
{"title":"Freshwater runoff on the east Greenland shelf","authors":"Robert W. Helber,&nbsp;Scott R. Smith,&nbsp;Gleb Panteleev,&nbsp;Jay F. Shriver","doi":"10.1016/j.dsr2.2024.105402","DOIUrl":"10.1016/j.dsr2.2024.105402","url":null,"abstract":"<div><p>The Greenland Ice Sheet releases fresh water from ice melt, tundra snow melt, and solid ice at an increasing rate during recent decades resulting in an increasing amount of freshwater runoff into the ocean. As a result, freshwater runoff is changing the continental shelf circulation by increasing the amount of fresher water on the shelf that may then enter the deep ocean. Observational studies show that dense water does traverse the east Greenland shelf near the ocean bottom but it is unclear to what extent the transport of near surface fresh water, as a result of runoff, reaches deeper water and enters the Irminger Basin. Using 4 km resolution nested numerical model simulations with and without freshwater runoff, we show freshwater runoff increases salinity variability with increased baroclinicity. While higher salinity variability and baroclinicity suggest a greater potential for water mass exchange across the East Greenland Current, most freshwater runoff along east Greenland remains on the shelf. From freshwater runoff alone, salinity and salt mass decreases by 0.22% on the continental shelf compared to a 0.01% in the rest of the Nordic Seas. There is a 0.05% reduction in salt mass on the Greenland shelf region that makes up 8% of the simulation domain, suggesting little water exits the shelf along the east coast of Greenland. The largest reduction in salt mass occurs around Iceland, where substantial freshwater runoff exists. A calculation of baroclinic conversion rate suggests likely pathways for runoff to exit the continental shelf and enter deep water in the Denmark Strait and over the Greenland/Scottland ridge east of Iceland. Most of the fresh water, however, released along the east coast of Greenland continues towards Cape Farewell, outside our modeling domain, and into the Labrador Sea.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"217 ","pages":"Article 105402"},"PeriodicalIF":2.3,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The habitat preference of commercial tuna species based on a daily environmental database approach in the tropical region of the Eastern Indian Ocean off Java-Bali waters 基于日环境数据库方法的东印度洋热带地区爪哇-巴厘海域商业金枪鱼物种的生境偏好
IF 2.3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-07-14 DOI: 10.1016/j.dsr2.2024.105400
Martiwi Diah Setiawati , Herlambang Aulia Rachman , Abd Rahman As-syakur , Riza Yuliratno Setiawan , Augy Syahailatua , Sam Wouthuyzen
{"title":"The habitat preference of commercial tuna species based on a daily environmental database approach in the tropical region of the Eastern Indian Ocean off Java-Bali waters","authors":"Martiwi Diah Setiawati ,&nbsp;Herlambang Aulia Rachman ,&nbsp;Abd Rahman As-syakur ,&nbsp;Riza Yuliratno Setiawan ,&nbsp;Augy Syahailatua ,&nbsp;Sam Wouthuyzen","doi":"10.1016/j.dsr2.2024.105400","DOIUrl":"10.1016/j.dsr2.2024.105400","url":null,"abstract":"<div><p>This paper explores the habitat characteristics of commercial tuna species based on daily oceanography parameters in the Eastern Indian Ocean Off Java-Bali Waters. Moreover, more research is needed combining the daily spatial distribution of oceanographic variables of surface and sub-surface data to analyse the habitat characteristics of large pelagic fish, including tuna species. In this study, we used five main daily oceanography parameters: sea surface temperature (SST), sea surface chlorophyll (CHLa), sea surface height (SSH), dissolved oxygen at 100m (DO100), the temperature at 100m (temp100) and the combination of the catch of yellowfin (YFT), albacore (ALT) and bigeye (BET) tuna that use long lines. To analyse the relationship between the environmental database and tuna catch, we utilized Generalized Additive Models (GAMs) from univariate variables until the combination of all variables. The result stated that all the variables influence the existence of all tuna species with P-values &lt;0.001. Temperature is the most critical predictor variable, SST is the most vital predictor for BET and YFT tuna, and temp100 is the most critical for ALT. The second most essential variables were DO100 for BET, Temp 100 for YFT, and SSH for ALT. Moreover, BET and YFT prefer to stay at a lower temp100, and ALT tuna remains at a higher temp100. However, all of them avoid an SST higher than 29 °C. Further assessment of the long-term SST trend specific to tuna species is required to fully account for the effects of global warming on the oceans.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105400"},"PeriodicalIF":2.3,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141630823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An introducton to the Ross sea international conference special issue 罗斯海国际会议特刊简介
IF 2.3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-28 DOI: 10.1016/j.dsr2.2024.105398
Pierpaolo Falco, Walker O. Smith Jr.
{"title":"An introducton to the Ross sea international conference special issue","authors":"Pierpaolo Falco,&nbsp;Walker O. Smith Jr.","doi":"10.1016/j.dsr2.2024.105398","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105398","url":null,"abstract":"<div><p>An international conference on the oceanography of the Ross Sea was held in Naples, Italy in July 2023. A total of 75 abstracts were presented orally, and 20 presented as posters. Researchers from 11 countries attended, with conference support from a variety of public and private firms. The conference was held under the patronage of the United Nations Decade of Ocean Science for Sustainable Development, the Southern Ocean Observing System, the Ministero dell’Università e della Ricera, the Programma Nazionale di Recerche in Antartide, and the Commissione Oceanografica Italiana, and was organized by Parthenope University of Naples and Marche Polytechnic University of Ancona. The papers included were either presented at the meeting or were closely related to the conference's goals and program. The conference maintained Italy's long tradition of hosting engaging conferences on oceanographic research in the Ross Sea.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105398"},"PeriodicalIF":2.3,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141592710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ENSO independent tropical-extratropical signal off the Northeast Pacific 东北太平洋近海独立于厄尔尼诺/南方涛动的热带-外热带信号
IF 2.3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-27 DOI: 10.1016/j.dsr2.2024.105399
Christian Salvadeo , Daniel B. Lluch-Cota , Salvador E. Lluch-Cota , Romeo Saldívar-Lucio , Raúl O. Martínez-Rincón
{"title":"ENSO independent tropical-extratropical signal off the Northeast Pacific","authors":"Christian Salvadeo ,&nbsp;Daniel B. Lluch-Cota ,&nbsp;Salvador E. Lluch-Cota ,&nbsp;Romeo Saldívar-Lucio ,&nbsp;Raúl O. Martínez-Rincón","doi":"10.1016/j.dsr2.2024.105399","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105399","url":null,"abstract":"<div><p>Numerous temporal and spatial patterns of natural climate variability have been characterized. By analyzing standardized and detrended sea surface temperature anomalies (SSTA) along the coast from 1950 to 2023, this study identifies two dominant modes of ocean variability in the Northeast Pacific Boundary Current (NEPBC) which includes the California and Alaska currents. The first mode is the prevalent pattern of interannual variability associated with the El Niño-Southern Oscillation. A second mode arises as an independent dipole between the coasts of North and Central America, with the strongest intensities on a portion of the NEPBC (38°-53°N) and the Eastern Pacific warm pool (EPWP, 2°S-15°N). The difference in SSTA between the two regions appears to be caused by variations in the intensity and distribution of atmospheric pressure fields and it is related with the Pacific Meridional Mode and North Pacific Oscillation. Such coastal mode will provide the opportunity to describe the interactions of coastal processes with climate indices capturing larger-scale phenomena.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105399"},"PeriodicalIF":2.3,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141542537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mesoscale eddy modulation of winter convective mixing in the northern Arabian Sea 阿拉伯海北部冬季对流混合的中尺度涡动调制
IF 3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-13 DOI: 10.1016/j.dsr2.2024.105397
Prasad G. Thoppil
{"title":"Mesoscale eddy modulation of winter convective mixing in the northern Arabian Sea","authors":"Prasad G. Thoppil","doi":"10.1016/j.dsr2.2024.105397","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105397","url":null,"abstract":"<div><p>The formation of Arabian Sea High Salinity Water (ASHSW) during the winter monsoon in the northern Arabian Sea is driven by surface buoyancy loss, which increases surface density and triggers convective mixing. The depth of convective mixing is influenced by the interplay between surface cooling (buoyancy loss) and upper-ocean stratification. Mesoscale eddies present during winter can alter this stratification and modulate convective mixing. We investigated the impact of these eddies on convective mixing and ASHSW formation utilizing a combination of observations, data assimilative model results, and 1-D and 3-D model experiments. Our analyses consistently demonstrate that the depth of winter convective mixing is influenced by the stratification imposed by mesoscale features, resulting in distinct mixing characteristics. When subjected to identical buoyancy forcing, convective mixing associated with cyclonic eddies occurs at shallower depths compared to anticyclonic eddies. This difference is particularly pronounced during the peak period of convective mixing (January–February), exceeding 50 m, compared to the early stages (November–December). The combined effect of cyclonic and anticyclonic eddies generates spatially inhomogeneous convective mixing, which cannot be solely explained by buoyancy flux. These conclusions are supported by Argo observations and analyses of 1-D and 3-D model experiments. Overall, our study highlights the significant role of mesoscale eddies in modulating convective mixing and ASHSW formation in the northern Arabian Sea.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105397"},"PeriodicalIF":3.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0967064524000419/pdfft?md5=5a9f5f6739770956ca2fea6546bb670e&pid=1-s2.0-S0967064524000419-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic impact of transiting weather systems on coastal currents in the northern Gulf of Mexico 过境天气系统对墨西哥湾北部沿岸流的动态影响
IF 3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-12 DOI: 10.1016/j.dsr2.2024.105395
Chunyan Li , Alex Sheremet , Wei Huang , Padmanava Dash , Ankita Katkar , Mohammad Nabi Allahdadi , Nazanin Chaichitehrani , Charles M. Bachmann , Victor H. Rivera-Monroy
{"title":"Dynamic impact of transiting weather systems on coastal currents in the northern Gulf of Mexico","authors":"Chunyan Li ,&nbsp;Alex Sheremet ,&nbsp;Wei Huang ,&nbsp;Padmanava Dash ,&nbsp;Ankita Katkar ,&nbsp;Mohammad Nabi Allahdadi ,&nbsp;Nazanin Chaichitehrani ,&nbsp;Charles M. Bachmann ,&nbsp;Victor H. Rivera-Monroy","doi":"10.1016/j.dsr2.2024.105395","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105395","url":null,"abstract":"<div><p>Moving weather systems determine the history of wind variations with patterns as the systems transit through the ocean. These weather systems are integrated entities that can provide a system level perspective. A vessel-based survey repeatedly occupying a 30-km transect 12 times in 36 h provided non-aliased measurements of velocity field that showed how the along-shelf transport varied by more than three-fold in response to a transiting high-pressure weather system following an atmospheric cold front. To further illustrate the impact of different weather systems, we analyzed time series data from moored ADCPs, which showed influence on the velocity field from infrequent summertime cold fronts and remote hurricanes moving through the region, one on the west and the other on the east of the study site. Rotary spectrum analysis showed that the flow field rotated mostly clockwise with a smaller but non-negligible counterclockwise component, consistent with near inertial oscillations mixed with weak tidal currents. A theoretical model is presented by a Laplace transform and a general relationship between the velocity field and forcing functions is obtained, which shows that the contributions to the rotary velocity field from various forcing functions are through mathematical convolutions between the forcing functions and the complex frictional-rotary inertial function (CFRIF). These convolutions include an integrated effect of history of the forcing. CFRIF is effectively a frictional rotary filter that favors inertial oscillations. The wind-stress induced velocity field over a few days is computed and it shows significant variations after the passage of a cold front, with a magnitude consistent with observations. The wind-stress induced velocity is a few times greater than the density driven flow during the ship-based observations. The weather systems passing through the region can impact coastal currents causing a great variability over short time scales.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105395"},"PeriodicalIF":3.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141423515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of a fresh-core mesoscale eddy in modulating oceanic response to a Madden-Julian Oscillation 新鲜核心中尺度涡流在调节海洋对马登-朱利安涛动的响应方面的影响
IF 2.3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-11 DOI: 10.1016/j.dsr2.2024.105396
Marina V.C. Azaneu , Adrian J. Matthews , Karen J. Heywood , Rob A. Hall , Dariusz B. Baranowski
{"title":"Impact of a fresh-core mesoscale eddy in modulating oceanic response to a Madden-Julian Oscillation","authors":"Marina V.C. Azaneu ,&nbsp;Adrian J. Matthews ,&nbsp;Karen J. Heywood ,&nbsp;Rob A. Hall ,&nbsp;Dariusz B. Baranowski","doi":"10.1016/j.dsr2.2024.105396","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105396","url":null,"abstract":"<div><p>Theories of ocean–atmosphere interaction during a Madden–Julian Oscillation (MJO) are generally based on a thermodynamic model with surface fluxes dictating changes in sea surface temperature. Evidence from a two month ocean glider deployment in early 2019 in the southeast Indian Ocean suggests the impact of mesoscale dynamics on upper-ocean stratification likely affects ocean–atmosphere interaction at MJO scales. Until mid-February, local surface fluxes consistent with a convectively suppressed MJO phase drove near-surface ocean evolution. With the advection of a fresh-core eddy to the glider location in late February, ocean dynamics then becomes an additional driver of this evolution by modulating local stratification and generating a barrier layer of ≈12 m thickness for 10 days. One-dimensional modelling experiments based on the ocean and atmospheric conditions experienced during our sampling period show that the ocean subsurface structure within the eddy induce changes in SST of physical significance for ocean-atmosphere interaction. Moreover, results also suggest that the presence of a thick eddy-induced barrier layer during the MJO suppressed phase modulates the magnitude of temperature anomalies forced by surface fluxes during the following enhanced MJO phase. As eddies are abundant in this area, their dynamics must be considered to correctly represent SST variability for MJO modelling.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105396"},"PeriodicalIF":2.3,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141439160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prokaryotic diversity in the sponges Mycale (Oxymycale) acerata (Kirkpatrick, 1907) and Dendrilla antarctica (Topsent, 1905) from two distant Antarctic marine areas: South Cove at Rothera Point (Adelaide Island, Western Antarctic Peninsula) and Thetys Bay (Terra Nova Bay, Ross Sea) 来自两个遥远南极海域的海绵 Mycale (Oxymycale) acerata (Kirkpatrick, 1907) 和 Dendrilla antarctica (Topsent, 1905) 中的原核生物多样性:罗瑟拉角的南湾(南极半岛西部的阿德莱德岛)和泰蒂斯湾(罗斯海的特拉诺瓦湾)
IF 3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-06-01 DOI: 10.1016/j.dsr2.2024.105391
Angelina Lo Giudice , Maria Papale , Maurizio Azzaro , Carmen Rizzo
{"title":"Prokaryotic diversity in the sponges Mycale (Oxymycale) acerata (Kirkpatrick, 1907) and Dendrilla antarctica (Topsent, 1905) from two distant Antarctic marine areas: South Cove at Rothera Point (Adelaide Island, Western Antarctic Peninsula) and Thetys Bay (Terra Nova Bay, Ross Sea)","authors":"Angelina Lo Giudice ,&nbsp;Maria Papale ,&nbsp;Maurizio Azzaro ,&nbsp;Carmen Rizzo","doi":"10.1016/j.dsr2.2024.105391","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105391","url":null,"abstract":"<div><p>The Antarctic environment offers a unique opportunity to study the interactions between Porifera and their microbial symbionts. Reports on the association between prokaryotes and Antarctic sponges are increasing. However, a comparison of the bacterial communities associated to the same sponge species but inhabiting different Antarctic areas has seldom been addressed. This study explored the prokaryotes associated with the sponge species <em>Mycale</em> (<em>Oxymycale</em>) <em>acerata</em> (Kirkpatrick, 1907) and <em>Dendrilla antarctica</em> (Topsent, 1905) collected from South Cove at Rothera Point (Antarctic Peninsula) and Thetys Bay (Ross Sea). In <em>D. antarctica</em>, some groups were equally represented at both sites (e.g., <em>Amylibacter</em>, <em>Cutibacterium</em>, <em>Yoonia-Loktanella</em>), whereas members in the genera <em>Polaribacter</em> and <em>Kistimonas</em> were more abundant in Rothera. Similarly, <em>M. acerata</em> individuals collected from Rothera showed a higher relative abundance of some bacterial genera, such as <em>Polaribacter</em>, <em>Sulfitobacter</em>, and <em>Ulvibacter</em>. The results allowed us to identify some taxa common to sponges belonging to the same species and highlighted the possible influence of site-specific environmental conditions in shaping symbionts.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105391"},"PeriodicalIF":3.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finding boundaries in the sea: The Main and Small Gap of the Emperor Seamount Chain as a biogeographic boundary for bathyal benthic fauna 在海洋中寻找边界:帝王海山链的大缺口和小缺口是海底底栖动物的生物地理边界
IF 3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-05-27 DOI: 10.1016/j.dsr2.2024.105394
Les Watling , John R. Smith , Scott C. France , Amy Baco , Henrietta Dulai , Glenn S. Carter , E. Brendan Roark
{"title":"Finding boundaries in the sea: The Main and Small Gap of the Emperor Seamount Chain as a biogeographic boundary for bathyal benthic fauna","authors":"Les Watling ,&nbsp;John R. Smith ,&nbsp;Scott C. France ,&nbsp;Amy Baco ,&nbsp;Henrietta Dulai ,&nbsp;Glenn S. Carter ,&nbsp;E. Brendan Roark","doi":"10.1016/j.dsr2.2024.105394","DOIUrl":"https://doi.org/10.1016/j.dsr2.2024.105394","url":null,"abstract":"<div><p>Studies on the bathyal fauna of northern Pacific waters suggested that a transition or boundary between the North Pacific Province and Central Pacific Provinces would be found somewhere along the Emperor Seamount Chain. Strong currents flow west to east across the seamount chain in a region known as the Main Gap and it was proposed that any larvae produced either north or south of the Main Gap would not be capable of crossing the gap. An expedition to test the hypothesis that a faunal change would be found in the vicinity of the Main Gap was conducted in 2019. Eleven ROV dives were conducted, one on an unnamed seamount at the southern edge of Hess Rise, and 10 dives on seven seamounts along the Emperor Seamount Chain. Six dives were on seamounts north of the Main Gap, while four (including the dive on Hess Rise) were on the southern side. Of the six northern dives, three were at deeper depths (∼2000–1800 m) and three were shallower (∼1500–1100 m); of the southern dives two were at the deeper depths and two were shallower. One shallower dive occurred on Jingu Seamount, situated on the southern edge of the Main Gap. Analysis of the fauna from both collected specimens and annotations of the dive video produced four clusters: <strong>a</strong>, the four dives south of the Main Gap; <strong>b</strong>, the three deeper dives north of the Main Gap; <strong>c</strong>, the shallower dive at Jingu Seamount; and <strong>d</strong>, the four shallower bathyal dives north of the Main Gap. It was concluded that the bathyal fauna underwent a significant change from north to south across the area of the Main Gap and the adjacent Small Gap, in the area of 37–39 °N, covering distances as small as 75 km or as much as 400 km.</p></div>","PeriodicalId":11120,"journal":{"name":"Deep-sea Research Part Ii-topical Studies in Oceanography","volume":"216 ","pages":"Article 105394"},"PeriodicalIF":3.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141249523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microzooplankton and phytoplankton of Ross Sea polynya areas and potential linkage among functional traits 罗斯海极地区域的微型浮游生物和浮游植物以及功能特征之间的潜在联系
IF 3 3区 地球科学
Deep-sea Research Part Ii-topical Studies in Oceanography Pub Date : 2024-05-27 DOI: 10.1016/j.dsr2.2024.105393
Marina Monti-Birkenmeier , Tommaso Diociaiuti , Francesco Bolinesi , Maria Saggiomo , Olga Mangoni
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