Life history of an anticyclonic eddy in the Algerian basin from altimetry data, tracking algorithm and in situ observations.

2020 ◽  
Vol 207 ◽  
pp. 103346
Author(s):  
Federica Pessini ◽  
Yuri Cotroneo ◽  
Antonio Olita ◽  
Roberto Sorgente ◽  
Alberto Ribotti ◽  
...  
Keyword(s):  
Life History ◽  
Anticyclonic Eddy ◽  
Tracking Algorithm ◽  
Altimetry Data ◽  
History Of ◽  
In Situ Observations ◽  
Data Tracking

scholarly journals A new species of pygmy Paroctopus (Cephalopoda: Octopodidae): the smallest southwestern Atlantic octopod, found in sea debris

2021 ◽  
Author(s):  
Tatiana S. Leite ◽  
Erica A.G. Vidal ◽  
Françoise Dantas Lima ◽  
Sergio M.Q. Lima ◽  
Ricardo M Dias ◽  
...  
Keyword(s):  
New Species ◽  
Western Atlantic ◽  
Bayesian Phylogenetic Analysis ◽  
History Of ◽  
Novel Habitat ◽  
In Situ Observations ◽  
Males And Females ◽  
The Relationship ◽  
A New Species

Abstract The new species, Paroctopus cthulu sp. nov. Leite, Haimovici, Lima and Lima, was recorded from very shallow coastal waters on sandy/muddy and shelter-poor bottoms with natural and human-origin debris. It is a small octopus, adults are less than 35 mm mantle length (ML) and weigh around 15 g. It has short to medium sized arms, enlarged suckers on the arms of both males and females, large posterior salivary glands (25 %ML), a relatively large beak (9 % ML) and medium to large mature eggs (3.5 to > 9 mm). The characteristics of hatchlings of two brooding females, some of their anatomical features, and in-situ observations of their behaviour are a clue to the life history of it and closely related pygmy octopuses. The Bayesian phylogenetic analysis showed that Paroctopus cthulu sp.nov. specimens grouped in a well-supported clade of Paroctopus species, separate from P.joubini and P. cf mercatoris from the Northwestern Atlantic . The description of this new species, living in a novel habitat of human debris in shallow water off Brazil, offered an opportunity not only to evaluate the relationship among the small octopuses of the western Atlantic, Caribbean and eastern Pacific, but also their adaptation to the Anthropocene period.

scholarly journals The Mediterranean outflow in the Strait of Gibraltar and its connection with upstream conditions in the Alborán Sea

Ocean Science ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. 195-207 ◽  
Author(s):  
Jesús García-Lafuente ◽  
Cristina Naranjo ◽  
Simone Sammartino ◽  
José C. Sánchez-Garrido ◽  
Javier Delgado
Keyword(s):  
Potential Temperature ◽  
Western Mediterranean ◽  
Altimetry Data ◽  
Alboran Sea ◽  
Strait Of Gibraltar ◽  
Mediterranean Outflow ◽  
Alboran Basin ◽  
In Situ Observations ◽  
Alborán Sea

Abstract. The present study addresses the hypothesis that the Western Alborán Gyre in the Alborán Sea (the westernmost Mediterranean basin adjacent to the Strait of Gibraltar) influences the composition of the outflow through the Strait of Gibraltar. The process invoked is that strong and well-developed gyres help to evacuate the Western Mediterranean Deep Water from the Alborán basin, thus increasing its presence in the outflow, whereas weak gyres facilitate the outflow of Levantine and other intermediate waters. To this aim, in situ observations collected at the Camarinal (the main) and Espartel (the westernmost) sills of the strait have been analysed along with altimetry data, which were employed to obtain a proxy of the strength of the gyre. An encouraging correlation of the expected sign was observed between the time series of potential temperature at the Espartel Sill, which is shown to keep information on the outflow composition, and the proxy of the Western Alborán Gyre, suggesting the correctness of the hypothesis, although the weakness of the involved signals does not allow for drawing definitive conclusions.

scholarly journals The Mediterranean Outflow in the Strait of Gibraltar and its connection with upstream conditions in the Alborán Sea

2016 ◽  
Author(s):  
Jesús García-Lafuente ◽  
Cristina Naranjo ◽  
Simone Sammartino ◽  
José C. Sánchez-Garrido ◽  
Javier Delgado
Keyword(s):  
Potential Temperature ◽  
Western Mediterranean ◽  
Altimetry Data ◽  
Alboran Sea ◽  
Strait Of Gibraltar ◽  
Mediterranean Outflow ◽  
Alboran Basin ◽  
In Situ Observations ◽  
Alborán Sea

Abstract. The present study addresses the hypothesis that the Western Alborán Gyre in the Alborán Sea (the westernmost Mediterranean basin adjacent to the Strait of Gibraltar) influences the composition of the outflow through the Strait of Gibraltar. The process invoked is that strong and well-developed gyres help to evacuate the Western Mediterranean Deep Water from the Alborán basin, thus increasing its presence in the outflow, whereas weak gyres facilitates the outflow of Levantine and other Intermediate waters. To this aim, in situ observations collected at Camarinal (the main) and Espartel (the westernmost) sills of the Strait have been analysed along with altimetry data, which were employed to obtain a proxy of the strength of the gyre. An encouraging correlation of the expected sign was observed between the time series of potential temperature at Espartel sill, which is shown to keep information on the outflow composition, and the proxy of the Western Alborán Gyre, suggesting the correctness of the hypothesis, although the weakness of the involved signals does not allow for drawing definitive conclusions.

scholarly journals Life history of an anticyclonic eddy

2005 ◽  
Vol 110 (C3) ◽  
Author(s):  
P. Sangrà ◽  
J. L. Pelegrí ◽  
A. Hernández-Guerra ◽  
Igor Arregui ◽  
J. M. Martín ◽  
...  
Keyword(s):  
Life History ◽  
Anticyclonic Eddy ◽  
History Of

scholarly journals In situ observations of “cold trap" dehydration in the western tropical Pacific

2006 ◽  
Vol 6 (4) ◽  
pp. 6903-6931
Author(s):  
F. Hasebe ◽  
M. Fujiwara ◽  
N. Nishi ◽  
M. Shiotani ◽  
H. Vömel ◽  
...  
Keyword(s):  
Water Vapor ◽  
Trajectory Analysis ◽  
Cold Trap ◽  
Temperature History ◽  
Vapor Concentration ◽  
Tropical Tropopause Layer ◽  
Tropical Tropopause ◽  
History Of ◽  
In Situ Observations

Abstract. Water vapor sonde observations were conducted at Bandung, Indonesia (6.90 S, 107.60 E) and Tarawa, Kiribati (1.35 N, 172.91 E) in December 2003 to examine the efficiency of the "cold trap'' dehydration in the tropical tropopause layer (TTL). Trajectory analysis based on bundles of trajectories suggest that the modification of air parcels' identity due to irreversible mixing by the branching-out and merging-in of nearby trajectories is found to be an important factor, in addition to the routes air parcels are supposed to follow, for interpreting the water vapor concentrations observed by radiosondes in the TTL. Clear correspondence between the observed water vapor concentration and the estimated temperature history of air parcels is found showing that dry air parcels are exposed to low temperatures while humid air parcels do not experience cold conditions during advection, in support of the "cold trap'' hypothesis. It is suggested that the observed air parcel retained the water vapor by roughly twice as much as the minimum saturation mixing ratio after its passage through the "cold trap,'' although appreciable uncertainties remain.

scholarly journals Impacts of mean dynamic topography on a regional ocean assimilation system

2015 ◽  
Vol 12 (3) ◽  
pp. 1083-1105
Author(s):  
C. Yan ◽  
J. Zhu ◽  
C. A. S. Tanajura
Keyword(s):  
Sea Surface Height ◽  
Sea Surface ◽  
Dynamic Topography ◽  
Altimetry Data ◽  
Mean Dynamic Topography ◽  
Mean Sea Surface ◽  
In Situ Observations ◽  
The Mean

Abstract. An ocean assimilation system was developed for the Pacific-Indian oceans with the aim of assimilating altimetry data, sea surface temperature, and in-situ measurements from ARGO, XBT, CTD, and TAO. The altimetry data assimilation requires the addition of the mean dynamic topography to the altimetric sea level anomaly to match the model sea surface height. The mean dynamic topography is usually computed from the model long-term mean sea surface height, and is also available from gravimeteric satellite data. In this study, different mean dynamic topographies are used to examine their impacts on the sea level anomaly assimilation. Results show that impacts of the mean dynamic topography cannot be neglected. The mean dynamic topography from the model long-term mean sea surface height without assimilating in-situ observations results in worsened subsurface temperature and salinity estimates. The gravimeter-based mean dynamic topography results in an even worse estimate. Even if all available observations including in-situ measurements, sea surface temperature measurements, and altimetry data are assimilated, the estimates are still not improved. This further indicates that the other types of observations do not compensate for the shortcoming due to the altimetry data assimilation. The mean dynamic topography computed from the model's long-term mean sea surface height after assimilating in-situ observations presents better results.

scholarly journals In situ observations of dehydrated air parcels advected horizontally in the Tropical Tropopause Layer of the western Pacific

2007 ◽  
Vol 7 (3) ◽  
pp. 803-813 ◽  
Author(s):  
F. Hasebe ◽  
M. Fujiwara ◽  
N. Nishi ◽  
M. Shiotani ◽  
H. Vömel ◽  
...  
Keyword(s):  
Water Vapor ◽  
Temperature History ◽  
Vapor Concentration ◽  
Tropical Tropopause Layer ◽  
Horizontal Advection ◽  
Tropical Tropopause ◽  
History Of ◽  
In Situ Observations ◽  
The Western Pacific

Abstract. Water vapor observations by chilled-mirror hygrometers were conducted at Bandung, Indonesia (6.90° S, 107.60° E) and Tarawa, Kiribati (1.35° N, 172.91° E) in December 2003 to examine the efficiency of dehydration during horizontal advection in the tropical tropopause layer (TTL). Trajectory analyses based on bundles of isentropic trajectories suggest that the modification of air parcels' identity due to irreversible mixing by the branching-out and merging-in of nearby trajectories is found to be an important factor, in addition to the routes air parcels follow, for interpreting the water vapor concentrations observed by chilled-mirror frostpoint hygrometers in the TTL. Clear correspondence between the observed water vapor concentration and the estimated temperature history of air parcels is found showing that drier air parcels were exposed to lower temperatures than were more humid ones during advection. Although the number of observations is quite limited, the water content in the observed air parcels on many occasions was more than that expected from the minimum saturation mixing ratio during horizontal advection prior to sonde observations.

CLUES TO THE LIFE HISTORY OF CARCINOMA IN SITU OF THE LARYNX

1971 ◽  
Vol 81 (9) ◽  
pp. 1475-1480 ◽  
Author(s):  
Alden H. Miller ◽  
H Russell Fisher
Keyword(s):  
Life History ◽  
Carcinoma In Situ ◽  
History Of

In situ observations of electromigration induced void behavior

1995 ◽  
Vol 53 ◽  
pp. 244-245
Author(s):  
T. Marieb ◽  
J. C. Bravman ◽  
P. Flinn ◽  
D. Gardner ◽  
M. Madden
Keyword(s):  
Electron Microscopy ◽  
Void Nucleation ◽  
Plan View ◽  
Transmission Electron ◽  
Nucleation Sites ◽  
Microelectronics Industry ◽  
In Situ Observations ◽  
Backscatter Electron Detector ◽  
Voltage Scanning

Electromigration and stress voiding have been active areas of research in the microelectronics industry for many years. While accelerated testing of these phenomena has been performed for the last 25 years[1-2], only recently has the introduction of high voltage scanning electron microscopy (HVSEM) made possible in situ testing of realistic, passivated, full thickness samples at high resolution.With a combination of in situ HVSEM and post-testing transmission electron microscopy (TEM) , electromigration void nucleation sites in both normal polycrystalline and near-bamboo pure Al were investigated. The effect of the microstructure of the lines on the void motion was also studied.The HVSEM used was a slightly modified JEOL 1200 EX II scanning TEM with a backscatter electron detector placed above the sample[3]. To observe electromigration in situ the sample was heated and the line had current supplied to it to accelerate the voiding process. After testing lines were prepared for TEM by employing the plan-view wedge technique [6].

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