ocean sediments Archives - State of the Planet

How We Know Today’s Climate Change Is Not Natural

Despite the many climate “skeptics” in key positions of power today, 97 percent of climate scientists agree that the warming of Earth’s climate over the last 100 years is mainly due to human activity. Why are they so sure?

by |April 4, 2017

Almost Home, with Another 7 Million Years of Climate History

Science at sea isn’t easy, but the benefits are huge, writes Sidney Hemming in her final post from a two-month expedition that collected millions of years of climate history in the deep-sea sediment from off southern Africa.

by |March 25, 2016
Expedition 361’s nannofossil experts with their specialties: Top, left to right: Margit Simon, Thiago Pereira dos Santos, Luna Brentegani and Deborah Tangunan. Bottom left to right: Dick Norris and Jason Coenen. All associated with a fossil of their speciality (not quite to scale…). Illustration by Deborah Tangunan

Finding Microfossils off Southern Africa

Expedition 361’s newest sediment cores brought up spectacular foraminifera—translucent, glassy and “very pretty” throughout the ocean sediment.

by |March 19, 2016
Alexis Armstrong and Beth Novak of the International Ocean Discovery Program (IODP) prepare a core for laser engraving aboard the JOIDES Resolution. Photo: Tim Fulton/IODP

A Surprise from the Zambezi River

Sidney Hemming and her team aboard the JOIDES Resolution got a surprise when they began taking sediment cores from their first river site off southern Africa—about 10 times more sediment than expected.

by |March 16, 2016
Scientists crowd around the stratigraphic correlators' screens. Co-chief scientists Sidney Hemming and Ian Hall are on the right. Photo: Tim Fulton/IODP

Mozambique Core Brings Up 7 Million Years of Climate History

With calm seas, the JOIDES Resolution’s latest sediment core comes up with what appears to be a fantastic, cyclic climate signal that is continuous back 7 million years, writes Sidney Hemming.

by |March 11, 2016
Sedimentologists Andreas Koutsodendris of the University of Heidelberg, Masako Yamane of the Japan Agency for Marine-Earth Science and Technology, and Thibaut Caley of the University of Bordeaux study freshly split cores. Photo: Tim Fulton, IODP

We’re Headed for Mozambique!

After weeks of anticipation, permission arrived just in time to core off Mozambique. Sidney Hemming and her team of scientists aboard the JOIDES Resolution are excited about what they might learn from the ocean sediment.

by |March 8, 2016
Sedimentologists Thibaut Caley of the University of Bordeaux and Andreas Koutsodendris of the University of Heidelberg and Deborah Tangunan, a paleontologist from the University of Bremen at work in the core lab aboard the JOIDES Resolution. Photo: Tim Fulton/IODP.

Trials & Tribulations of Coring the Agulhas Plateau

Trying to drill sediment cores while the ship rides large ocean swells off the coast of Africa isn’t easy, but it’s paying off for science, writes Sidney Hemming.

by |February 28, 2016

Uncovering the Stories of Southern Africa’s Climate Past

Sidney Hemming is preparing to spend two months at sea studying global ocean circulation and southern Africa’s climate variability over the past 5 million years.

by |January 27, 2016

Study Tracks an Abrupt Climate Shift as Ice Age Glaciers Began to Retreat

That change would have affected the monsoons, today relied on to feed over half the world’s population, and could have helped tip the climate system over the threshold for deglaciation.

by |January 22, 2016

Come Aboard: A Look at the R/V Marcus Langseth

A new video produced by Columbia University tells the story of what the research vessel Marcus G. Langseth is all about.

by |October 15, 2015