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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.

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Related Experiment Video

Updated: May 23, 2025

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

Published on: April 20, 2012

Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica.

Hamish D Pritchard¹, Peter T Fretwell², Alice C Fremand³

¹British Antarctic Survey, Cambridge, UK. hprit@bas.ac.uk.

Scientific Data

|March 11, 2025

Summary

Bedmap3 offers updated Antarctic elevation data, including ice thickness and subglacial landscapes. This new dataset enhances understanding of Antarctica

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Area of Science:

* Glaciology and Antarctic Geoscience.

Background:

* Previous Antarctic digital elevation models (e.g., Bedmap2) had data gaps.
* Antarctic ice sheet research requires comprehensive surface and subglacial data.

Purpose of the Study:

* To release Bedmap3, an updated gridded dataset of Antarctic surface and subglacial topography.
* To integrate new geophysical surveys and fill data gaps in critical regions.

Main Methods:

* Aggregation of post-1950s datasets, including 84 new aero-geophysical surveys.
* Incorporation of over 52 million new data points and 1.9 million line-kilometres of measurements.
* Consolidation of multiple grounding line mappings into the Bedmap3/RINGS product.

Main Results:

* Bedmap3 provides enhanced detail of Antarctica's subglacial landscape and ice distribution.
* Significant data gaps filled in major mountain ranges, East Antarctica interior, West Antarctic coastlines, and the Antarctic Peninsula.
* Updated maps of surface topography, ice shelf thickness, rock outcrops, and bathymetry are included.

Conclusions:

* Bedmap3 offers unprecedented detail for interpreting Antarctic landscape evolution.
* The dataset facilitates improved modeling of past and future Antarctic ice sheet behavior.
* Bedmap3 is a crucial resource for polar research and climate change studies.