GRAPHIC CORRELATION OF PLIO-PLEISTOCENE SEQUENCE BOUNDARIES, GULF OF MEXICO: OXYGEN ISOTOPES, ICE VOLUME, AND SEA LEVEL

1995 ◽  
pp. 235-248 ◽  
Author(s):  
RONALD E. MARTIN ◽  
RUTH R. FLETCHER
1987 ◽  
Vol 6 (3-4) ◽  
pp. 183-190 ◽  
Author(s):  
N.J. Shackleton

2022 ◽  
pp. 169-170
Author(s):  
Natalia Vázquez-Riveiros ◽  
Samuel Toucanne ◽  
Filipa Naughton ◽  
Teresa Rodrigues ◽  
María Fernanda Sánchez Goñi

2020 ◽  
Vol 12 (3) ◽  
pp. 350
Author(s):  
Guoquan Wang ◽  
Xin Zhou ◽  
Kuan Wang ◽  
Xue Ke ◽  
Yongwei Zhang ◽  
...  

We have established a stable regional geodetic reference frame using long-history (13.5 years on average) observations from 55 continuously operated Global Navigation Satellite System (GNSS) stations adjacent to the Gulf of Mexico (GOM). The regional reference frame, designated as GOM20, is aligned in origin and scale with the International GNSS Reference Frame 2014 (IGS14). The primary product from this study is the seven-parameters for transforming the Earth-Centered-Earth-Fixed (ECEF) Cartesian coordinates from IGS14 to GOM20. The frame stability of GOM20 is approximately 0.3 mm/year in the horizontal directions and 0.5 mm/year in the vertical direction. The regional reference frame can be confidently used for the time window from the 1990s to 2030 without causing positional errors larger than the accuracy of 24-h static GNSS measurements. Applications of GOM20 in delineating rapid urban subsidence, coastal subsidence and faulting, and sea-level rise are demonstrated in this article. According to this study, subsidence faster than 2 cm/year is ongoing in several major cities in central Mexico, with the most rapid subsidence reaching to 27 cm/year in Mexico City; a large portion of the Texas and Louisiana coasts are subsiding at 3 to 6.5 mm/year; the average sea-level-rise rate (with respect to GOM20) along the Gulf coast is 2.6 mm/year with a 95% confidence interval of ±1 mm/year during the past five decades. GOM20 provides a consistent platform to integrate ground deformational observations from different remote sensing techniques (e.g., GPS, InSAR, LiDAR, UAV-Photogrammetry) and ground surveys (e.g., tide gauge, leveling surveying) into a unified geodetic reference frame and enables multidisciplinary and cross-disciplinary research.


2011 ◽  
Vol 38 (21) ◽  
pp. n/a-n/a ◽  
Author(s):  
Alexander S. Kolker ◽  
Mead A. Allison ◽  
Sultan Hameed

2005 ◽  
Vol 17 (2) ◽  
pp. 281-287 ◽  
Author(s):  
J. OERLEMANS

Fluctuations in the volume of the Antarctic ice sheet for the last 740 ka are calculated by forcing a simple ice sheet model with a sea-level history (from a composite deep sea δ18O record) and a temperature history (from the Dome C deuterium record). Antarctic ice volume reaches maximum values of about 30 × 1015 m3, 3 to 8 ka after glacial maxima [defined as maximum values of the deep sea δ18O record]. Minimum values of ice volume reached in the course of interglacial periods are about 26 × 1015 m3. Most of the time the temperature forcing (larger accumulation) and sea-level forcing (grounding-line retreat) tend to have competing effects. However, towards the end of a glacial cycle, when temperature rises and sea-level is still relatively low, the ice volume reaches a peak. The peak value is very sensitive to the relative phase of the sea-level forcing with respect to the temperature forcing. This is further studied by looking at the response of the model to purely periodic forcings with different relative phase. The large sensitivity of ice sheet size to the phase of the forcings may have some implications for dating of deep ice cores. Care has to be taken by using anchor points from the deep sea record.


Nature ◽  
1986 ◽  
Vol 324 (6093) ◽  
pp. 137-140 ◽  
Author(s):  
J. Chappell ◽  
N. J. Shackleton

Science ◽  
2012 ◽  
Vol 337 (6091) ◽  
pp. 216-219 ◽  
Author(s):  
A. Dutton ◽  
K. Lambeck

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