Response of waves and coastline evolution to climate variability off the Niger Delta coast during the past 110years

Fifteen proxy records of summer temperature in Fennoscandia, Northern Europe and in Yamal and Taymir Peninsulas (Western Siberia) were analyzed for the AD 1700–2000 period. Century-long (70–100 year) and quasi bi-decadal periodicities were found from proxy records representing different parts of Fennoscandia. Decadal variation was revealed in a smaller number of records. Statistically significant correlations were revealed between the timescale-dependent components of temperature variability and solar cycles of Schwabe (~11 year), Hale (~22 year), and Gleissberg (сentury-long) as recorded in solar activity data. Combining the results from our correlation analysis with the evidence of solar-climatic linkages over the Northern Fennoscandia obtained over the past 20 years suggest that there are two possible explanations for the obtained solar-proxy relations: (a) the Sun’s activity actually influences the climate variability in Northern Fennoscandia and in some regions of the Northern Hemisphere albeit the mechanism of such solar-climatic linkages are yet to be detailed; (b) the revealed solar-type periodicities result from natural instability of climate system and, in such a case, the correlations may appear purely by chance. Multiple lines of evidence support the first assumption but we note that the second one cannot be yet rejected. Guidelines for further research to elucidate this question are proposed including the Fisher’s combined probability test in the presence of solar signal in multiple proxy records.

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Reservoir characterization and by-passed pay analysis of philus field in Niger delta, Nigeria

International Journal of Advanced Geosciences ◽

10.14419/ijag.v4i2.6255 ◽

2016 ◽

Vol 4 (2) ◽

pp. 28 ◽

Cited By ~ 3

Author(s):

Sunmonu Ayobami ◽

Adabanija Adedapo ◽

Adagunodo Aanuoluwa ◽

Adeniji Ayokunnu

Keyword(s):

Niger Delta ◽

Oil And Gas ◽

Reservoir Characterization ◽

Petroleum Industry ◽

Volumetric Analysis ◽

Vital Role ◽

Oil And Gas Exploration ◽

The Past ◽

Stock Tank ◽

Original Oil In Place

Hydrocarbon resources have become the most essential commodity contributing to any nation’s growth and development in the recent years. For the past decades now, the quest for hydrocarbon resources has been increasing in an arithmetic rate that its supply can no longer meets the demand for its consumption today. In petroleum industry, seismic and well log analyses play a vital role in oil and gas exploration and formation evaluation. This study is aimed to effectively characterize the reservoirs and analyze the by-passed pay in Philus Field, Niger-Delta, Nigeria in order to look into the economic viability and profitability of the volume of oil in the identified reservoir(s). The faults in the study area trend in NW-SE direction and dip towards the south. Seven reservoirs were mapped on Philus field. A discovery trap and a by-passed (new prospect) trap were mapped out on the field. The petrophysical analysis showed that porosity of Philus field was 0.24. The volumetric analysis showed that the Stock Tank Original Oil in Place of discovery trap (Philus field) ranged from 1.6 to 43.1 Mbbl while that of new prospect trap ranged from 18.1 to 211.3 Mbbl. It is recommended that the oil reserve of Philus field needs to be recalculated.

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A chrysophyte-based quantitative reconstruction of winter severity from varved lake sediments in NE Poland during the past millennium and its relationship to natural climate variability

Quaternary Science Reviews ◽

10.1016/j.quascirev.2015.05.029 ◽

2015 ◽

Vol 122 ◽

pp. 74-88 ◽

Cited By ~ 9

Author(s):

I. Hernández-Almeida ◽

M. Grosjean ◽

R. Przybylak ◽

W. Tylmann

Keyword(s):

Climate Variability ◽

Lake Sediments ◽

Natural Climate Variability ◽

Quantitative Reconstruction ◽

The Past ◽

Ne Poland ◽

Varved Lake Sediments ◽

Natural Climate ◽

Past Millennium ◽

Winter Severity

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Vulnerability of rice production in the Inner Niger Delta to water resources management under climate variability and change

Environmental Science & Policy ◽

10.1016/j.envsci.2012.10.014 ◽

2013 ◽

Vol 34 ◽

pp. 18-33 ◽

Cited By ~ 43

Author(s):

S. Liersch ◽

J. Cools ◽

B. Kone ◽

H. Koch ◽

M. Diallo ◽

...

Keyword(s):

Water Resources ◽

Climate Variability ◽

Water Resources Management ◽

Niger Delta ◽

Rice Production ◽

Climate Variability And Change ◽

Resources Management

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Mid-Pleistocene transition in glacial cycles explained by declining CO2and regolith removal

Science Advances ◽

10.1126/sciadv.aav7337 ◽

2019 ◽

Vol 5 (4) ◽

pp. eaav7337 ◽

Cited By ~ 44

Author(s):

M. Willeit ◽

A. Ganopolski ◽

R. Calov ◽

V. Brovkin

Keyword(s):

Climate Variability ◽

Carbon Cycle ◽

Northern Hemisphere ◽

Seasonal Variations ◽

Ice Sheets ◽

Glacial Cycles ◽

Solar Insolation ◽

The Past ◽

Transient Simulations

Variations in Earth’s orbit pace the glacial-interglacial cycles of the Quaternary, but the mechanisms that transform regional and seasonal variations in solar insolation into glacial-interglacial cycles are still elusive. Here, we present transient simulations of coevolution of climate, ice sheets, and carbon cycle over the past 3 million years. We show that a gradual lowering of atmospheric CO2and regolith removal are essential to reproduce the evolution of climate variability over the Quaternary. The long-term CO2decrease leads to the initiation of Northern Hemisphere glaciation and an increase in the amplitude of glacial-interglacial variations, while the combined effect of CO2decline and regolith removal controls the timing of the transition from a 41,000- to 100,000-year world. Our results suggest that the current CO2concentration is unprecedented over the past 3 million years and that global temperature never exceeded the preindustrial value by more than 2°C during the Quaternary.

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