Geodesy

Earth observation

Bits and Bites of Geodesy – Satellite altimetry: What else can we do with it?

Bene Aschenneller, edited by Öykü Koç and edited by Marius Schlaak May 31, 2024

Figure courtesy: Öykü Koç

In the previous post of this series, we learned how we can use satellite radar altimetry to retrieve highly accurate estimates of global sea level changes. If only reading “sea level” triggers your climate anxiety – we got you covered! In this post we will introduce you to three more applications of radar altimetry, where the first two are not directly connected to climate change. Instead, w ...[Read More]

High resolution terrestrial water storage changes from combination of GRACE and models

Khosro Ghobadi-Far, edited by Öykü Koç and Bramha Dutt Vishwakarma February 7, 2024

Image credits: Jakob Keck (distributed via imaggeo.egu.eu)

The Gravity Recovery and Climate Experiment (GRACE) satellite mission (2002-2017) consisted of two satellites at ~500 km altitude separated by 200 km, following each other in the same orbit. The distance between the two GRACE satellites changes because of the gravitational pull of the masses beneath the satellites. As such, mass changes at or near the Earth’s surface caused variations in the dista ...[Read More]

Calculating postglacial sea-level change within few seconds: a statistical emulator for GIA

Yucheng Lin, edited by Marius Schlaak and Bramha Dutt Vishwakarma December 22, 2023

Figure 1. Map of the global ice sheet and topography during the Last Glacial Maximum. Areas with dark green colour indicate land created by sea-level lowering. Figure courtesy of J. Austermann; Dendy et al., 2017.

Sea-level change serves as a direct indicator of climate change with profound implications for coastal areas. Since 1900, the global mean sea level (GMSL) has risen over 20 cm, leading to beach erosion, delta inundation, and increased flooding worldwide. Over glacial cycles spanning tens of thousands of years, interactions between ocean and continental-scale ice sheets can cause GMSL to fluctuate ...[Read More]

Reshaping Earth: GIA and its far-reaching effects

Holger Steffen, Rebekka Steffen, Yucheng Lin and edited by Öykü Koç December 19, 2023

Julien Seguinot (distributed via imaggeo.egu.eu)

As the Geodesy blog team (we are growing, horaay!), we wanted to create a space for researchers to talk about their work/papers in a more simplified language. For the first post in this series, we said “Wouldn’t it be cool if we learn more about Glacial Isostatic Adjustment (GIA) models?” then we realised that we first need to uncover what GIA is. So, we passed the pen to Holger, Rebekka and Yuche ...[Read More]

About

Welcome to the blog of the Geodesy Division of the European Geosciences Union. The blog serves to keep you posted on current research, news from the division and interesting geodesy-related topics in general. It will also give room to feature young (early-career) scientists and their science. An enthusiastic team of (Early Career) Scientists (ECS) runs the blog. Are you interested in writing a blog entry or learning more about the ECS activities of the geodesy division? Please get in touch with the Editor-in-Chief, Rebekka Steffen, or the ECS Geodesy (G) Representative Öykü Koç and ECS G Co-Representative Marius Schlaak.