scholarly journals Aegean Sea-Level Variability in the Past Half-Century Based on Tide Gauge Data

2022 ◽  
Vol 9 (1) ◽  
pp. 162-169
Author(s):  
Cem ŞENDURAN ◽  
Sedat KABDAŞLI
Keyword(s):  
Sea Level ◽  
Tide Gauge ◽  
Aegean Sea ◽  
Tide Gauge Data ◽  
Sea Level Variability ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Gauge Data ◽  
Past Half

scholarly journals Reconstruction and Projection of Sea Level Around the Korean Peninsula Using Cyclostationary Empirical Orthogonal Functions

2017 ◽  
Author(s):  
Se-Hyeon Cheon ◽  
Benjamin D. Hamlington ◽  
Kyung-Duck Suh
Keyword(s):  
Sea Level ◽  
Satellite Data ◽  
Korean Peninsula ◽  
Tide Gauge ◽  
Tide Gauges ◽  
Tide Gauge Data ◽  
Satellite Altimeter ◽  
Reconstruction Process ◽  
The Past ◽  
Gauge Data

Abstract. Since the advent of the modern satellite altimeter era, the understanding of the sea level has increased dramatically. The satellite altimeter record, however, dates back only to the 1990s. The tide gauge record, on the other hand, extends through the 20th century, but with poor spatial coverage when compared to the satellites. Many studies have been conducted to extend the spatial resolution of the satellite data into the past by finding novel ways to combine the satellite data and tide gauge data in what are known as sea level reconstructions. However, most of the reconstructions of sea level were conducted on a global scale, leading to reduced accuracy on regional levels, particularly where there are relatively few tide gauges. The sea around the Korean Peninsula is one such area with few tide gauges prior to 1960. In this study, new methods are proposed to reconstruct the past sea level and project the future sea level around the Korean Peninsula. Using spatial patterns obtained from a cyclo-stationary empirical orthogonal function decomposition of satellite data, we reconstruct sea level over the time period from 1900 to 2014. Sea surface temperature data and altimeter data are used simultaneously in the reconstruction process, leading to an elimination of reliance on tide gauge data. Although the tide gauge data was not used in the reconstruction process, the reconstructed results showed better agreement with the tide gauge observations in the region than previous studies that incorporated the TG data. This study demonstrates a reconstruction technique that can be used on regional levels, with particular emphasis on areas with poor tide gauge coverage.

scholarly journals Pacific Decadal Oscillation and Sea Level Variability in the Bohai, Yellow, and East China Seas

2008 ◽  
Vol 38 (12) ◽  
pp. 2772-2783 ◽  
Author(s):  
Guoqi Han ◽  
Weigen Huang
Keyword(s):  
Sea Level ◽  
Pacific Decadal Oscillation ◽  
Decadal Variability ◽  
Tide Gauge ◽  
East China ◽  
Tide Gauge Data ◽  
Sea Level Variability ◽  
Steric Height ◽  
Gauge Data ◽  
Ocean Topography

Abstract Sea level variability off East China has been investigated based primarily on 10 years of Ocean Topography Experiment (TOPEX)/Poseidon altimetry data. The altimetric annual harmonic has a magnitude of 10 to 30 cm in amplitude and is highest in summer, agreeing well with independent tide-gauge data. After the inverse barometer effect is removed, the annual sea level cycle can be approximately accounted for by the steric height variation. Significant interannual sea level change was also observed from altimetry and tide-gauge data, with a range of ∼10 cm. The interannual and longer-term sea level variability in the altimetric data are negatively correlated (significant at the 95% confidence level) with the Pacific decadal oscillation (PDO), attributed in part to steric height change. The altimetric sea level rise rate is 0.64 cm yr−1 for the period from 1992 to 2002, consistent with the tide-gauge rate of 0.6 cm yr−1. These values are much larger than the rate of 0.24 cm yr−1 observed at the same tide gauges but for the period from 1980 to 2002, implying the sensitivity to the length of data as a result of the decadal variability. The potential role of the PDO in the interannual and longer-term sea level variability is discussed in terms of regional manifestations such as the ocean temperature and salinity and the Kuroshio transport.

scholarly journals Review article: Sea-level rise in Venice: historic and future trends

2020 ◽  
Author(s):  
Davide Zanchettin ◽  
Sara Bruni ◽  
Fabio Raicich ◽  
Piero Lionello ◽  
Fanny Adloff ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Tide Gauge ◽  
Tide Gauge Data ◽  
Relative Sea Level ◽  
Mean Sea Level ◽  
The Past ◽  
Gauge Data ◽  
Relative Sea Level Rise ◽  
Global Mean

Abstract. The City of Venice and the surrounding lagoonal ecosystem are highly vulnerable to variations in relative sea level. In the past ~150 years, this was characterized by a secular linear trend of about 2.5 mm/year resulting from the combined contributions of vertical land movement and sea-level rise. This literature review reassesses and synthesizes the progress achieved in understanding, estimating and predicting the individual contributions to local relative sea level, with focus on the most recent publications. The current best estimate of historical sea-level rise in Venice, based on tide-gauge data after removal of subsidence effects, is 1.23 ± 0.13 mm/year (period from 1872 to 2019). Subsidence thus contributed to about half of the observed relative sea-level rise over the same period. A higher – yet more uncertain – rate of sea-level rise is observed during recent decades, estimated from tide-gauge data to be about 2.76 ± 1.75 mm/year in the period 1993–2019 for the climatic component alone. An unresolved issue is the contrast between the observational capacity of tide gauges and satellite altimetry, with the latter tool not covering the Venice Lagoon. Water mass exchanges through the Gibraltar Strait currently constitute a source of substantial uncertainty for estimating future deviations of the Mediterranean mean sea-level trend from the global-mean value. Subsidence and regional atmospheric and oceanic circulation mechanisms can deviate Venetian relative sea-level trends from the global mean values for several decades. Regional processes will likely continue to determine significant interannual and interdecadal variability of Venetian sea level with magnitude comparable to that observed in the past, as well as non-negligible differential trends. Our estimate of the likely range of mean sea-level rise in Venice by 2100 due to climate change is presently estimated between 11 and 110 centimetres. An improbable yet possible high-end scenario linked to strong ice-sheet melting yields about 170 centimetres of mean sea-level rise in Venice by 2100. Projections of natural and human induced vertical land motions are currently not available, but historical evidence demonstrates that they can produce a significant contribution to the relative sea-level rise in Venice, further increasing the hazard posed by climatically-induced sea-level changes.

Reframing the Sciences of the Long Eighteenth Century

2020 ◽  
Vol 50 (1-2) ◽  
pp. 58-66
Author(s):  
Giuliano Pancaldi
Keyword(s):  
Eighteenth Century ◽  
History Of Science ◽  
Science Policy ◽  
Special Issue ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
History Of ◽  
Long Eighteenth Century ◽  
Past Half

Here I survey a sample of the essays and reviews on the sciences of the long eighteenth century published in this journal since it was founded in 1969. The connecting thread is some historiographic reflections on the role that disciplines—in both the sciences we study and the fields we practice—have played in the development of the history of science over the past half century. I argue that, as far as disciplines are concerned, we now find ourselves a bit closer to a situation described in our studies of the long eighteenth century than we were fifty years ago. This should both favor our understanding of that period and, hopefully, make the historical studies that explore it more relevant to present-day developments and science policy. This essay is part of a special issue entitled “Looking Backward, Looking Forward: HSNS at 50,” edited by Erika Lorraine Milam.

The Twentysomething Soul

2019 ◽  
Author(s):  
Tim Clydesdale ◽  
Kathleen Garces-Foley
Keyword(s):  
Young Adults ◽  
Religious Commitment ◽  
Religion And Spirituality ◽  
Lost Generation ◽  
Full Spectrum ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Past Half ◽  
The Way

Few realize how much Americans’ journey through their twenties has changed during the past half-century or understand how incorrect popular assumptions about young adults’ religious, spiritual, and secular lives are. Today’s twentysomethings have been labelled the “lost generation”—for their presumed inability to identify and lead fulfilling lives, “kidults”—for their alleged refusal to “grow up” and accept adult responsibilities, and the “least religious generation”—for their purported disinterest in religion and spirituality. These characterizations are not only unflattering, they are deeply flawed. The Twentysomething Soul tells an optimistic story about American twentysomethings. Drawing on hundreds of interviews and a survey of thousands across America, it introduces readers to the full spectrum of American young adults, many of whom live purposefully, responsibly, and reflectively. Some prioritize faith and spirituality. Others reject their childhood religion to explore alternatives and practice a personal spirituality. Still others sideline religion and spirituality until their lives get settled or reject organized religion completely. There is change occurring in the religious and spiritual lives of young adults, but little of it is among the 1 in 4 American twentysomethings who have consistently prioritized religious commitment during the past half-century. The change is rather among the now 3 in 10 young adults who, though intentionally unaffiliated with religion, affirm a variety of religious, spiritual, and secular beliefs. The Twentysomething Soul will change the way readers view contemporary young adults, giving an accurate—and refreshing—understanding of their religious, spiritual, and secular lives.

Oxford Studies in Philosophy of Religion Volume 9

2019 ◽  
Keyword(s):  
Philosophy Of Science ◽  
Philosophy Of Language ◽  
Philosophy Of Religion ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Inclusive Approach ◽  
Past Half

This is the ninth volume of Oxford Studies in Philosophy of Religion. As with earlier volumes, these essays follow the tradition of providing a non-sectarian and non-partisan snapshot of the subdiscipline of philosophy of religion. This subdiscipline has become an increasingly important one within philosophy over the last century, and especially over the past half century, having emerged as an identifiable subfield with this timeframe along with other emerging subfields such as the philosophy of science and the philosophy of language. This volume continues the initial intention behind the series of attracting the best work from the premier philosophers of religion, as well as including work by top philosophers outside this area when their work and interests intersect with issues in the philosophy of religion. This inclusive approach to the series provides an opportunity to mitigate some of the costs of greater specialization in our discipline, while at the same time inviting wider interest in the work being done in the philosophy of religion.

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