Tidal and residual currents in the Bransfield Strait, Antarctica

1994 ◽  
Vol 12 (9) ◽  
pp. 887-902 ◽  
Author(s):  
O. López ◽  
M. A. García ◽  
A. S.-Arcilla
Keyword(s):  
Time Series ◽  
Tidal Flow ◽  
Relative Importance ◽  
Tide Gauges ◽  
Recording Equipment ◽  
Residual Currents ◽  
Bransfield Strait ◽  
Operation Period ◽  
Dense Grid ◽  
Tidal And Residual Currents

Abstract. During the 1992-1993 oceanographic cruise of the Spanish R/V Hespérides, recording equipment was deployed in the Bransfield Strait. Six Aanderaa RCM7 current meters and three Aanderaa WLR7 tide gauges were successfully recovered after an operation period of 2.5 months. Relevant features of the time series obtained are presented and discussed in this paper. The emphasis is placed on the tidal character of the currents and the relative importance of tidal flow in the general hydrodynamics of the strait. For these purposes a dense grid of hydrographic stations, completed during the BIOANTAR 93 cruise, is used. Preliminary geostrophic calculations relative to a 400 m depth, yield current velocities of around 0.20 m s-1 in the study area, whereas the magnitude of tidal currents is seen to be 0.30-0.40 m s-1.

scholarly journals Recent sea level rise on Ireland's east coast based on multiple tide gauge analysis

2020 ◽  
Author(s):  
Amin Shoari Nejad ◽  
Andrew C. Parnell ◽  
Alice Greene ◽  
Brian P. Kelleher ◽  
Gerard McCarthy
Keyword(s):  
Time Series ◽  
Sea Level Rise ◽  
Sea Level ◽  
Continuous Time ◽  
East Coast ◽  
Tide Gauge ◽  
Tide Gauges ◽  
Missing Value ◽  
Global Average ◽  
Good Agreement

Abstract. We analysed multiple tide gauges from the east coast of Ireland over the period 1938–2018. We validated the different time series against each other and performed a missing value imputation exercise, which enabled us to produce a homogenised record. The recordings of all tide gauges were found to be in good agreement between 2003–2015, though this was markedly less so from 2016 to the present. We estimate the sea level rise in Dublin port for this period at 10 mm yr−1. The rate over the longer period of 1938–2015 was 1.67 mm yr−1 which is in good agreement with the global average. We found that the rate of sea level rise in the longer term record is cyclic with some extreme upward and downward trends. However, starting around 1980, Dublin has seen significantly higher rates that have been always positive since 1996, and this is mirrored in the surrounding gauges. Furthermore, our analysis indicates an increase in sea level variability since 1980. Both decadal rates and continuous time rates are calculated and provided with uncertainties in this paper.

scholarly journals The Relative Importance of Health Care and Social Services for Population Health: A Time Series Investigation

2019 ◽  
Vol 11 (10) ◽  
pp. 93
Author(s):  
Benjamin Yawney ◽  
Akhter Faroque
Keyword(s):  
Health Care ◽  
Time Series ◽  
Population Health ◽  
Social Services ◽  
Health Indicators ◽  
Relative Importance ◽  
Vector Error Correction ◽  
Long Run ◽  
Short Run ◽  
Vector Error Correction Models

We study the relative importance of government health care and social services spending in the short, medium and long run across vector error correction models for six population health indicators. Each model takes into account the key time series properties of the health input and output data and also controls for the broader socio-economic, demographic, life-style and environmental determinants of health. The evidence shows that both types of spending contribute significantly to extending life expectancy and lowering mortality. However, the relative contributions of health care spending are bigger in the short run, while those of social services spending are bigger in the medium and the long run. Any policy of re-allocation of resources from health care to social services must take this trade-off into account.

The observed tidal and residual currents in the Andaman Sea during the second half of 2016

2018 ◽  
Vol 37 (9) ◽  
pp. 13-21 ◽  
Author(s):  
Yanliang Liu ◽  
Jingsong Guo ◽  
Huiwu Wang ◽  
Yuhuan Xue ◽  
Somkiat Khokiattiwong ◽  
...  
Keyword(s):  
Andaman Sea ◽  
Residual Currents ◽  
Tidal And Residual Currents

scholarly journals PROBING COMPLEX NETWORKS FROM MEASURED TIME SERIES

2012 ◽  
Vol 22 (10) ◽  
pp. 1250236 ◽  
Author(s):  
LIANG HUANG ◽  
YING-CHENG LAI ◽  
MARY ANN F. HARRISON
Keyword(s):  
Time Series ◽  
Complex Networks ◽  
Network Topology ◽  
Efficient Method ◽  
Relative Importance ◽  
Computationally Efficient ◽  
Heuristic Argument ◽  
Principal Eigenvector ◽  
Measured Time ◽  
Potential Applications

We propose a method to detect nodes of relative importance, e.g. hubs, in an unknown network based on a set of measured time series. The idea is to construct a matrix characterizing the synchronization probabilities between various pairs of time series and examine the components of the principal eigenvector. We provide a heuristic argument indicating the existence of an approximate one-to-one correspondence between the components and the degrees of the nodes from which measurements are obtained. The striking finding is that such a correspondence appears to be quite robust, which holds regardless of the detailed node dynamics and of the network topology. Our computationally efficient method thus provides a general means to address the important problem of network detection, with potential applications in a number of fields.

scholarly journals Using continuous GPS and absolute gravity to separate vertical land movements and changes in sea-level at tide-gauges in the UK

2006 ◽  
Vol 364 (1841) ◽  
pp. 917-930 ◽  
Author(s):  
F.N Teferle ◽  
R.M Bingley ◽  
S.D.P Williams ◽  
T.F Baker ◽  
A.H Dodson
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Tide Gauge ◽  
Absolute Gravity ◽  
Tide Gauges ◽  
Tide Gauge Record ◽  
Vertical Movements ◽  
Movement Component ◽  
The Uk ◽  
Continuous Gps

Researchers investigating climate change have used historical tide-gauge measurements from all over the world to investigate the changes in sea-level that have occurred over the last century or so. However, such estimates are a combination of any true sea-level variations and any vertical movements of the land at the specific tide-gauge. For a tide- gauge record to be used to determine the climate related component of changes in sea-level, it is therefore necessary to correct for the vertical land movement component of the observed change in sea-level. In 1990, the Institute of Engineering Surveying and Space Geodesy and Proudman Oceanographic Laboratory started developing techniques based on the Global Positioning System (GPS) for measuring vertical land movements (VLM) at tide-gauges in the UK. This paper provides brief details of these early developments and shows how they led to the establishment of continuous GPS (CGPS) stations at a number of tide-gauges. The paper then goes on to discuss the use of absolute gravity (AG), as an independent technique for measuring VLM at tide-gauges. The most recent results, from CGPS time-series dating back to 1997 and AG time-series dating back to 1995/1996, are then used to demonstrate the complementarity of these two techniques and their potential for providing site-specific estimates of VLM at tide-gauges in the UK.

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