Kinematics of global mean thermosteric sea level during 1993–2019

Because oceans cover 71% of Earth’s surface, ocean warming, consequential for thermal expansion of sea water, has been the largest contributor to the global mean sea level rise averaged over the 20th and the early 21st century. This study first generates quasi-observed monthly globally averaged ther...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	İz H. Bâki
Formato:	article
Lenguaje:	EN
Publicado:	Sciendo 2021
Materias:	global mean sea level satellite altimetry global thermosteric sea level global mean sea surface temperature global sea level budget Geodesy QB275-343
Acceso en línea:	https://doaj.org/article/c543fb0ce70d444c9aa165fd19539f85
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c543fb0ce70d444c9aa165fd19539f85
record_format	dspace
spelling	oai:doaj.org-article:c543fb0ce70d444c9aa165fd19539f852021-12-05T14:10:52ZKinematics of global mean thermosteric sea level during 1993–20192081-994310.1515/jogs-2020-0121https://doaj.org/article/c543fb0ce70d444c9aa165fd19539f852021-08-01T00:00:00Zhttps://doi.org/10.1515/jogs-2020-0121https://doaj.org/toc/2081-9943Because oceans cover 71% of Earth’s surface, ocean warming, consequential for thermal expansion of sea water, has been the largest contributor to the global mean sea level rise averaged over the 20th and the early 21st century. This study first generates quasi-observed monthly globally averaged thermosteric sea level time series by removing the contributions of global mean sea level budget components, namely, Glaciers, Greenland, Antarctica, and Terrestrial Water Storage from satellite altimetry measured global sea level changes during 1993–2019. A baseline kinematic model with global mean thermosteric sea level trend and a uniform acceleration is solved to evaluate the performance of a rigorous mixed kinematic model. The model also includes coefficients of monthly lagged 60 yearlong cumulative global mean sea surface temperature gradients and control variables of lunisolar origins and representations for first order autoregressive disturbances. The mixed kinematic model explains 94% (Adjusted R2)1 of the total variability in quasi-observed monthly and globally averaged thermosteric time series compared to the 46% of the baseline kinematic model’s Adjusted R2. The estimated trend, 1.19±0.03 mm/yr., is attributed to the long-term ocean warming. Whereas eleven statistically significant (α = 0.05) monthly lagged cumulative global mean sea surface temperature gradients each having a memory of 60 years explain the remainder transient global mean thermosteric sea level changes due to the episodic ocean surface warming and cooling during this period. The series also exhibit signatures of a statistically significant contingent uniform global sea level acceleration and periodic lunisolar forcings.İz H. BâkiSciendoarticleglobal mean sea levelsatellite altimetryglobal thermosteric sea levelglobal mean sea surface temperatureglobal sea level budgetGeodesyQB275-343ENJournal of Geodetic Science, Vol 11, Iss 1, Pp 75-82 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	global mean sea level satellite altimetry global thermosteric sea level global mean sea surface temperature global sea level budget Geodesy QB275-343
spellingShingle	global mean sea level satellite altimetry global thermosteric sea level global mean sea surface temperature global sea level budget Geodesy QB275-343 İz H. Bâki Kinematics of global mean thermosteric sea level during 1993–2019
description	Because oceans cover 71% of Earth’s surface, ocean warming, consequential for thermal expansion of sea water, has been the largest contributor to the global mean sea level rise averaged over the 20th and the early 21st century. This study first generates quasi-observed monthly globally averaged thermosteric sea level time series by removing the contributions of global mean sea level budget components, namely, Glaciers, Greenland, Antarctica, and Terrestrial Water Storage from satellite altimetry measured global sea level changes during 1993–2019. A baseline kinematic model with global mean thermosteric sea level trend and a uniform acceleration is solved to evaluate the performance of a rigorous mixed kinematic model. The model also includes coefficients of monthly lagged 60 yearlong cumulative global mean sea surface temperature gradients and control variables of lunisolar origins and representations for first order autoregressive disturbances. The mixed kinematic model explains 94% (Adjusted R2)1 of the total variability in quasi-observed monthly and globally averaged thermosteric time series compared to the 46% of the baseline kinematic model’s Adjusted R2. The estimated trend, 1.19±0.03 mm/yr., is attributed to the long-term ocean warming. Whereas eleven statistically significant (α = 0.05) monthly lagged cumulative global mean sea surface temperature gradients each having a memory of 60 years explain the remainder transient global mean thermosteric sea level changes due to the episodic ocean surface warming and cooling during this period. The series also exhibit signatures of a statistically significant contingent uniform global sea level acceleration and periodic lunisolar forcings.
format	article
author	İz H. Bâki
author_facet	İz H. Bâki
author_sort	İz H. Bâki
title	Kinematics of global mean thermosteric sea level during 1993–2019
title_short	Kinematics of global mean thermosteric sea level during 1993–2019
title_full	Kinematics of global mean thermosteric sea level during 1993–2019
title_fullStr	Kinematics of global mean thermosteric sea level during 1993–2019
title_full_unstemmed	Kinematics of global mean thermosteric sea level during 1993–2019
title_sort	kinematics of global mean thermosteric sea level during 1993–2019
publisher	Sciendo
publishDate	2021
url	https://doaj.org/article/c543fb0ce70d444c9aa165fd19539f85
work_keys_str_mv	AT izhbaki kinematicsofglobalmeanthermostericsealevelduring19932019
_version_	1718371653098930176

Kinematics of global mean thermosteric sea level during 1993–2019

Ejemplares similares