scholarly journals Recent advances in observing mesoscale ocean dynamics with satellite altimetry

2012 ◽  
Vol 50 (8) ◽  
pp. 1062-1076 ◽  
Author(s):  
Rosemary Morrow ◽  
Pierre-Yves Le Traon
Keyword(s):  
Satellite Altimetry ◽  
Ocean Dynamics ◽  
Recent Advances

scholarly journals Self- and Inter-Crossover Points of Jasons’ Missions as New Essential Add-on of Satellite Altimetry in the Sub-Arctic Seas and the Southern Ocean

2021 ◽  
Author(s):  
Sergei Badulin ◽  
Andrey Kostianoy ◽  
Pavel Shabanov ◽  
Vitali Sharmar ◽  
Vika Grigorieva ◽  
...  
Keyword(s):  
Sea Level ◽  
Satellite Altimetry ◽  
Water Exchange ◽  
Wind Wave ◽  
World Ocean ◽  
Ocean Dynamics ◽  
Time Lags ◽  
Arctic Seas ◽  
Scientific Publications ◽  
Additional Information

Satellite altimetry is successfully developing during the past three decades for the sea level, ocean dynamics, coastal oceanography, planetary waves, ocean tides, wind and wave, ice cover, Earth’s gravity field, and climatology research. We propose a new essential add-on of satellite altimetry related to the peculiarities of the orbits of the Topex/Poseidon and Jasons’ satellite missions which were not mentioned before in the scientific publications. Derived subsets of “self-crossover” and “inter-crossover” points in sub-polar latitudes are discussed in detail in the context of water exchange, and wind-wave dynamics, and potential challenges to be solved. The relatively short time lags between measurements at these crossovers provide additional information on anomalies of magnitudes and directions of ocean currents, and characteristics of wind-driven waves. Resulting data snapshots with constant space and time intervals can be regarded as time series of virtual buoys, an analog of continuous buoy measurements of the sea level, wind speed, and wave height. Areas of the World Ocean where these specific crossovers occur are described in the context of water exchange, wind wave studies, and potential challenges to be solved. The value of these special crossovers for studies and monitoring of the sub-polar seas is illustrated by a case study.

Improved satellite altimetry for the observation of coastal ocean dynamics: a case study for the northern Indian Ocean

2006 ◽  
Author(s):  
F. Durand ◽  
D. Shankar ◽  
F. Birol ◽  
S. S. C. Shenoi ◽  
L. Roblou ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Satellite Altimetry ◽  
Coastal Ocean ◽  
Ocean Dynamics ◽  
Northern Indian Ocean

scholarly journals Satellite altimetry and ocean dynamics

2006 ◽  
Vol 338 (14-15) ◽  
pp. 1063-1076 ◽  
Author(s):  
Lee Lueng Fu ◽  
Pierre-Yves Le Traon
Keyword(s):  
Satellite Altimetry ◽  
Ocean Dynamics

New insight of the West Tropical Atlantic Circulation based on 25 years of satellite altimetry, PIRATA data and GLORYS ocean reanalysis

2021 ◽  
Author(s):  
Fabrice Hernandez ◽  
Djoirka M. Dimoune ◽  
Florence Birol ◽  
Fabien Leger ◽  
Moacyr Araujo
Keyword(s):  
Interannual Variability ◽  
Satellite Altimetry ◽  
Ocean Dynamics ◽  
Physical Parameters ◽  
Tropical Atlantic ◽  
The West ◽  
Ocean Reanalysis ◽  
The North ◽  
North Brazil ◽  
Basin Scale

<div><span>Satellite altimetry offers a mesoscale description of the ocean surface circulation worldwide since 1993. The Mercator Océan GLORYS12 reanalysis complement this description with a consistent 3-dimensional estimation of ocean physical parameters over the same period, with a reliability supported by the assimilation of available in-situ and satellite data. This information is used to revisit the ocean circulation description over the West Tropical Atlantic and in particular the seasonal and interannual variability of the western boundary current system from 20°S to 20°N connected to the tropical Atlantic basin scale circulation. PIRATA data since 2000 are used to validate the ocean reanalysis, and complement the description at depth of the main currents. The variability pattern and main characteristics of the North Brazil Undercurrent, the North Brazil Current and its Retroflection (NBCR), and the connections with the Equatorial Undercurrents, the South and North Equatorial Currents (SEC/NEC) and CounterCurrents (NECC) show seasonal changes. Both of their main pattern and the associated mesoscale field are dominated by the seasonal regimes. This circulation is linked to the tropical Atlantic Climate variability and the coupled pattern of wind and ocean dynamics. In particular, we show that the interannual variability of NECC, depending on the NBCR and SEC/NEC water transport exhibits different branches in relation with Tropical Atlantic Zonal and Meridional Mode of variability.</span></div>

Recent Advances in High Dispersion Spectroscopy of Globular Cluster Stars

1988 ◽  
Vol 132 ◽  
pp. 525-530
Author(s):  
Raffaele G. Gratton
Keyword(s):  
Globular Cluster ◽  
Globular Clusters ◽  
High Dispersion ◽  
Photographic Material ◽  
Recent Advances ◽  
Metal Abundances ◽  
Ccd Detectors ◽  
Major Progress

The use CCD detectors has allowed a major progress in abundance derivations for globular cluster stars in the last years. Abundances deduced from high dispersion spectra now correlates well with other abundance indicators. I discuss some problems concerning the derivation of accurate metal abundances for globular clusters using high dispersion spectra from both the old photographic and the most recent CCD data. The discrepant low abundances found by Cohen (1980), from photographic material for M71 giants, are found to be due to the use of too high microturbulences.

Chelation-assisted transition metal-catalysed C–H chalcogenylations

2020 ◽  
Vol 7 (8) ◽  
pp. 1022-1060 ◽  
Author(s):  
Wenbo Ma ◽  
Nikolaos Kaplaneris ◽  
Xinyue Fang ◽  
Linghui Gu ◽  
Ruhuai Mei ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Advances ◽  
Site Selectivity ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

This review summarizes recent advances in C–S and C–Se formations via transition metal-catalyzed C–H functionalization utilizing directing groups to control the site-selectivity.

Nucleosome dynamics

2006 ◽  
Vol 73 ◽  
pp. 109-119 ◽  
Author(s):  
Chris Stockdale ◽  
Michael Bruno ◽  
Helder Ferreira ◽  
Elisa Garcia-Wilson ◽  
Nicola Wiechens ◽  
...  
Keyword(s):  
High Resolution ◽  
Chromatin Structure ◽  
Current Knowledge ◽  
Dynamic Properties ◽  
Structure And Dynamics ◽  
Nucleosome Dynamics ◽  
Sharp Focus ◽  
Recent Advances ◽  
Insight Into ◽  
Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

Recent Advances in the Treatment of Pulmonary Tuberculosis

1950 ◽  
Vol 34 (5) ◽  
pp. 1363-1380
Author(s):  
Theodore L. Badger ◽  
William E. Patton
Keyword(s):  
Pulmonary Tuberculosis ◽  
Recent Advances
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