9.4.2.5 The Bruun rule relating shore erosion and sea level rising. Long time scale beach variation

2005 ◽  
pp. 229-229
Author(s):  
H. G. Gierloff-Emden
Keyword(s):  
Sea Level ◽  
Time Scale ◽  
Bruun Rule ◽  
Long Time ◽  
Shore Erosion ◽  
And Sea Level

Ice Sheets and Sea Level Change as a Response to Climatic Change at the Astronomical Time Scale

1990 ◽  
pp. 85-107 ◽  
Author(s):  
A. Berger ◽  
TH. Fichefet ◽  
H. Gallee ◽  
I. Marsiat ◽  
CH. Tricot ◽  
...  
Keyword(s):  
Climatic Change ◽  
Sea Level ◽  
Time Scale ◽  
Ice Sheets ◽  
Sea Level Change ◽  
Level Change ◽  
Astronomical Time ◽  
And Sea Level

scholarly journals Terrestrial waters and sea level variations on interannual time scale

2011 ◽  
Vol 75 (1-2) ◽  
pp. 76-82 ◽  
Author(s):  
W. Llovel ◽  
M. Becker ◽  
A. Cazenave ◽  
S. Jevrejeva ◽  
R. Alkama ◽  
...  
Keyword(s):  
Sea Level ◽  
Time Scale ◽  
Interannual Time Scale ◽  
Sea Level Variations ◽  
And Sea Level

Millennial to secular time-scale impacts of climate and sea-level changes on mangroves from the Doce River delta, Southeastern Brazil

The Holocene ◽  
2016 ◽  
Vol 26 (11) ◽  
pp. 1733-1749 ◽  
Author(s):  
Marlon Carlos França ◽  
Igor Charles C Alves ◽  
Marcelo CL Cohen ◽  
Dilce F Rossetti ◽  
Luiz CR Pessenda ◽  
...  
Keyword(s):  
Sea Level ◽  
Time Scale ◽  
River Delta ◽  
Southeastern Brazil ◽  
Sea Level Changes ◽  
Doce River ◽  
And Sea Level

scholarly journals Interaction of ice sheets and climate during the past 800 000 years

2014 ◽  
Vol 10 (3) ◽  
pp. 2547-2594
Author(s):  
L. B. Stap ◽  
R. S. W. van de Wal ◽  
B. de Boer ◽  
R. Bintanja ◽  
L. J. Lourens
Keyword(s):  
Temperature Profile ◽  
Sea Level ◽  
Time Scales ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Ice Cores ◽  
Atmospheric Temperature ◽  
The Past ◽  
Long Time ◽  
And Sea Level

Abstract. During the Cenozoic, land ice and climate have interacted on many different time scales. On long time scales, the effect of land ice on global climate and sea level is mainly set by large ice sheets on North America, Eurasia, Greenland and Antarctica. The climatic forcing of these ice sheets is largely determined by the meridional temperature profile resulting from radiation and greenhouse gas (GHG) forcing. As response, the ice sheets cause an increase in albedo and surface elevation, which operates as a feedback in the climate system. To quantify the importance of these climate-land ice processes, a zonally-averaged energy balance climate model is coupled to five one-dimensional ice-sheet models, representing the major ice sheets. In this study, we focus on the transient simulation of the past 800 000 years, where a high-confidence CO2-record from ice cores samples is used as input in combination with Milankovitch radiation changes. We obtain simulations of atmospheric temperature, ice volume and sea level, that are in good agreement with recent proxy-data reconstructions. We examine long-term climate-ice sheet interactions by a comparison of simulations with uncoupled and coupled ice sheets. We show that these interactions amplify global temperature anomalies by up to a factor 2.6, and that they increase polar amplification by 94%. We demonstrate that, on these long time scales, the ice-albedo feedback has a larger and more global influence on the meridional atmospheric temperature profile than the surface-height temperature feedback. Furthermore, we assess the influence of CO2 and insolation, by performing runs with one or both of these variables held constant. We find that atmospheric temperature is controlled by a complex interaction of CO2 and insolation, and both variables serve as thresholds for Northern Hemispheric glaciation.

scholarly journals SEA-LEVEL EFFECT ON ANNUAL CYCLIC BEACH MORPHOLOGY IN SWASH ZONE AT HASAKI COAST

2018 ◽  
pp. 35
Author(s):  
Masayuki Banno ◽  
Yoshiaki Kuriyama
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Observation Data ◽  
Swash Zone ◽  
Beach Profile ◽  
Beach Morphology ◽  
Bruun Rule ◽  
Decadal Scale ◽  
And Sea Level

depend on the accurate knowledge of the beach response to sea level regime on multi-time scale. For the long-term beach response, Bruun (1962) suggested that the equilibrium beach profile would move to new equilibrium profile in response to a rising sea level. In this concept called as Bruun rule, the upper part of the beach profile is eroded due to the sea level rise, resulting in the shoreline retreat. It is widely used for the future shoreline prediction. However, the Bruun rule predicts just only the final beach state with a constant wave impinging for an infinite period after sea level rise. On the other hand, simultaneous function of wave and sea level is more important on interannual to decadal-scale beach response. El niño in 2015 and 2016 increased wave energy and sea level, corresponding to large beach erosion across the US west coast (Barnard et al., 2017). Sea level influences the response sensitivity to the wave forcing as a subordinate factor on the morphological change. High water level anomalies made the beach more eroded even if the wave condition was equal. Beach morphology in the swash zone often changes on a 1-year cycle due to seasonal wave conditions. The effect of sea level on the annual cyclic beach morphology in swash zone is still unclear because long-term beach observation data required for the analysis are difficult to obtain. In this study, we investigated the simultaneous effects of the wave and sea level on annual cyclic beach morphology in the swash zone with spectrum analysis for 25-year Hasaki beach observation data.

Wind- and Sea Level-Induced Shore Evolution in Poland

1997 ◽  
Author(s):  
Ryszard B. Zeidler ◽  
Marek Skaja ◽  
Grzegorz Różyński ◽  
Jarka Kaczmarek
Keyword(s):  
Sea Level ◽  
And Sea Level

Phanerozoic Oxygen

2017 ◽  
Author(s):  
Donald Eugene Canfield
Keyword(s):  
Oxygen Consumption ◽  
Organic Carbon ◽  
Sea Level ◽  
Time Scale ◽  
Atmospheric Oxygen ◽  
Sea Level Change ◽  
Oxygen Production ◽  
Level Change ◽  
History Of ◽  
Geologic Processes

This chapter discusses the modeling of the history of atmospheric oxygen. The most recently deposited sediments will also be the most prone to weathering through processes like sea-level change or uplift of the land. Thus, through rapid recycling, high rates of oxygen production through the burial of organic-rich sediments will quickly lead to high rates of oxygen consumption through the exposure of these organic-rich sediments to weathering. From a modeling perspective, rapid recycling helps to dampen oxygen changes. This is important because the fluxes of oxygen through the atmosphere during organic carbon and pyrite burial, and by weathering, are huge compared to the relatively small amounts of oxygen in the atmosphere. Thus, all of the oxygen in the present atmosphere is cycled through geologic processes of oxygen liberation (organic carbon and pyrite burial) and consumption (weathering) on a time scale of about 2 to 3 million years.

Sign in / Sign up

Export Citation Format

Share Document