Natalya Gomez: различия между версиями
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| − | [[Category: | + | [[Category:Harvard University faculty]] |
| − | [[ | + | [https://en.wikipedia.org/wiki/Natalya_Gomez [[Natalya Gomez|Gomez]] received her Bachelor's Degree in Physics, with a math minor (2006), and her Master's Degree in Geophysics and Environmental Studies (2009) at the University of Toronto. Gomez earned her PhD at Harvard University in the Department of Earth and Planetary Sciences. Her thesis was on sea level and ice sheet interactions, advised by Professor Jerry X. [[Mitrovica]].] |
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= [https://www.researchgate.net/publication/249429251_A_new_projection_of_sea_level_change_in_response_to_collapse_of_marine_sectors_of_the_Antarctic_Ice_Sheet Sea level change due to Antarctic collapse] = | = [https://www.researchgate.net/publication/249429251_A_new_projection_of_sea_level_change_in_response_to_collapse_of_marine_sectors_of_the_Antarctic_Ice_Sheet Sea level change due to Antarctic collapse] = | ||
| − | 2010 | + | {{githubBook|Sal/Gomez 2010.pdf}}: [[Natalya Gomez]], Jerry X. [[Mitrovica]], Mark E. Tamisiea, [[Peter U Clark|Peter U. Clark]] |
== p. 625 == | == p. 625 == | ||
| − | The sea level theory adopted by Clark & Lingle (1977) was a special (elastic) case of a theory that was developed to model sea level changes associated with the Late Pleistocene ice-age cycles (Farrell & Clark 1976). However, over the last decade this “standard” theory has been extended to include rotational feedback (e.g. Milne & Mitrovica 1996, 1998; Peltier 1998; Mitrovica et al. 2005) and shoreline migration due to local changes in sea level at coastlines and/or the growth or ablation of grounded marine-based ice (e.g. Johnston 1993; Milne 1998; Milne et al. 1999; Mitrovica & Milne 2003; Mitrovica 2003; Kendall et al. 2005). | + | The sea level theory adopted by Clark & Lingle (1977) was a special (elastic) case of a theory that was developed to model sea level changes associated with the Late Pleistocene ice-age cycles (Farrell & Clark 1976). However, over the last decade this “standard” theory has been extended to include rotational feedback (e.g. Milne & [[Mitrovica]] 1996, 1998; Peltier 1998; Mitrovica et al. 2005) and shoreline migration due to local changes in sea level at coastlines and/or the growth or ablation of grounded marine-based ice (e.g. Johnston 1993; Milne 1998; Milne et al. 1999; Mitrovica & Milne 2003; Mitrovica 2003; Kendall et al. 2005). |
== p. 630 == | == p. 630 == | ||
The physics of rotational feedback is outlined in [[:file:Gomez 2010 fig6.png|Fig. 6]] and the associated caption... In our calculations, the collapse of the WAIS leads to a shift in the rotation pole of 92 m per metre of effective eustatic sea level rise (or ∼0.46 km for an EEV of 5 m)... the centre of mass of the West Antarctic is ∼10◦ from the south pole, and this displacement is clearly sufficient to drive a significant reorientation of the pole | The physics of rotational feedback is outlined in [[:file:Gomez 2010 fig6.png|Fig. 6]] and the associated caption... In our calculations, the collapse of the WAIS leads to a shift in the rotation pole of 92 m per metre of effective eustatic sea level rise (or ∼0.46 km for an EEV of 5 m)... the centre of mass of the West Antarctic is ∼10◦ from the south pole, and this displacement is clearly sufficient to drive a significant reorientation of the pole | ||
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2014, Carling Hay, Jerry X. Mitrovica, [[Natalya Gomez]], Jessica Creveling | 2014, Carling Hay, Jerry X. Mitrovica, [[Natalya Gomez]], Jessica Creveling | ||
== p. 62 == | == p. 62 == | ||
| − | Second, and more subtle, an off-axis ice-sheet collapse will perturb the orientation of the Earth's rotation axis (i.e., drive [[ | + | Second, and more subtle, an off-axis ice-sheet collapse will perturb the orientation of the Earth's rotation axis (i.e., drive [[true polar wander]], TPW) and the associated perturbation to the centrifugal potential will produce a sea-level signal (Milne and Mitrovica, 1996). In particular, the local rotation axis will reorient toward the zone of ice-sheet collapse (i.e., the South Pole will move toward the WAIS in Fig. 2A and toward the EAIS in Fig. 2C, while the North Pole will move toward the GIS in Fig. 2B), and this will lead to a spherical harmonic degree-two, order-one "quadrential" sealevel perturbation (Milne and Mitrovica, 1996;Gomez et al., 2010). The effect of this quadrential perturbation is significant. |
Текущая версия на 18:22, 2 февраля 2020
Gomez received her Bachelor's Degree in Physics, with a math minor (2006), and her Master's Degree in Geophysics and Environmental Studies (2009) at the University of Toronto. Gomez earned her PhD at Harvard University in the Department of Earth and Planetary Sciences. Her thesis was on sea level and ice sheet interactions, advised by Professor Jerry X. Mitrovica.
Содержание
Sea level change due to Antarctic collapse[править]
Gomez 2010.pdf: Natalya Gomez, Jerry X. Mitrovica, Mark E. Tamisiea, Peter U. Clark
p. 625[править]
The sea level theory adopted by Clark & Lingle (1977) was a special (elastic) case of a theory that was developed to model sea level changes associated with the Late Pleistocene ice-age cycles (Farrell & Clark 1976). However, over the last decade this “standard” theory has been extended to include rotational feedback (e.g. Milne & Mitrovica 1996, 1998; Peltier 1998; Mitrovica et al. 2005) and shoreline migration due to local changes in sea level at coastlines and/or the growth or ablation of grounded marine-based ice (e.g. Johnston 1993; Milne 1998; Milne et al. 1999; Mitrovica & Milne 2003; Mitrovica 2003; Kendall et al. 2005).
p. 630[править]
The physics of rotational feedback is outlined in Fig. 6 and the associated caption... In our calculations, the collapse of the WAIS leads to a shift in the rotation pole of 92 m per metre of effective eustatic sea level rise (or ∼0.46 km for an EEV of 5 m)... the centre of mass of the West Antarctic is ∼10◦ from the south pole, and this displacement is clearly sufficient to drive a significant reorientation of the pole
p. 631, Fig. 6[править]
From t0 to tj the rotation pole... assumed to have moved ... relative to the solid surface of the planet. (C) shows the difference in centrifugal potential between the two frames (B minus A) associated with the true polar wander
The sea-level fingerprints of ice-sheet collapse[править]
2014, Carling Hay, Jerry X. Mitrovica, Natalya Gomez, Jessica Creveling
p. 62[править]
Second, and more subtle, an off-axis ice-sheet collapse will perturb the orientation of the Earth's rotation axis (i.e., drive true polar wander, TPW) and the associated perturbation to the centrifugal potential will produce a sea-level signal (Milne and Mitrovica, 1996). In particular, the local rotation axis will reorient toward the zone of ice-sheet collapse (i.e., the South Pole will move toward the WAIS in Fig. 2A and toward the EAIS in Fig. 2C, while the North Pole will move toward the GIS in Fig. 2B), and this will lead to a spherical harmonic degree-two, order-one "quadrential" sealevel perturbation (Milne and Mitrovica, 1996;Gomez et al., 2010). The effect of this quadrential perturbation is significant.
