Showing posts from April, 2018

Around Antarctica in Five Years

by Thomas Ronge

I’m currently working on a project in which I’m trying to reconstruct changes in the circulation patterns of the Southern Ocean and their impact on past climate parameters. However, while looking at my data, pondering how water masses are transported from one spot in the ocean to another, I suddenly had to think about a big yellow buoy which crossed my path last year…

Is it an AUV? Is it an Argo Float? No! It’s a renegade buoy, casually braving the Southern Ocean. 
©Thomas Ronge/AWI

In February of 2017, heading for the Antarctic Amundsen Sea, we had been sailing the Southern Ocean for about a week. One day before we reached the sea ice margin, we spotted a big yellow buoy, dancing in the icy waves.

From the distance, the crew of R/V Polarstern could easily identify the buoy as the detached, uppermost part of a scientific mooring. During our expeditions, we always try to collect floating garbage and dispose of it properly, back on land. Therefore, the captain and our chie…

Dig Deeper! Why Do We Care about Lake Sediments?

by Alicja Bonk

Summer at the lake

Many people, when asked what they think about when they hear the word "lake", immediately answer "swimming", "summer" or "fish" (especially if the person asked is a fishing enthusiast). In this post, I will try to show you that lakes have even more to offer. To be more specific, I will explain why lake sediments in particular are of high interest to many people.

Why does all of this mud matter?

The answer to this question is quite complex. Lakes are considered as one of the best natural archives to track environmental and climatic changes because they store all information available not only from their direct catchment (Fig. 1) but also from a bigger area. It might come as a surprise to some, but climatic fluctuations, fires, human activities (eg. industry, agriculture) and many other factors can be tracked with the use of lake sediments.

The biggest advantage of lake sediments is that the life cycle of a lake is rel…