• Publications
  • Influence
Paleolimnology: The History and Evolution of Lake Systems
This text, written by a leading researcher in the field, describes the origin and formation of lakes in order to give context to the question of how lacustrine deposits form. It explains the processExpand
Northern Hemisphere Controls on Tropical Southeast African Climate During the Past 60,000 Years
The processes that control climate in the tropics are poorly understood. We applied compound-specific hydrogen isotopes (δD) and the TEX86 (tetraether index of 86 carbon atoms) temperature proxy toExpand
New palaeogeographic and lake-level reconstructions of Lake Tanganyika: implications for tectonic, climatic and biological evolution in a rift lake
Palaeogeographic and lake-level reconstructions provide powerful tools for evaluating competing scenarios of biotic, climatic and geological evolution within a lake basin. Here we present newExpand
Climate change decreases aquatic ecosystem productivity of Lake Tanganyika, Africa
TLDR
There is evidence that climate warming is diminishing productivity in Lake Tanganyika, East Africa, and the impact of regional effects of global climate change on aquatic ecosystem functions and services can be larger than that of local anthropogenic activity or overfishing. Expand
Ecological consequences of early Late Pleistocene megadroughts in tropical Africa
TLDR
This record of lake levels and changing limnological conditions provides a framework for interpreting the evolution of the Lake Malawi fish and invertebrate species flocks and places new constraints on models of Afrotropical biogeographic refugia and early modern human population expansion into and out of tropical Africa. Expand
Late-twentieth-century warming in Lake Tanganyika unprecedented since AD 500
Lake Tanganyika has become warmer, increasingly stratified and less productive over the past 90 years. Analyses of lake sediments show that this recent warming is unprecedented within the past 1,500Expand
East African megadroughts between 135 and 75 thousand years ago and bearing on early-modern human origins
TLDR
Results from new scientific drill cores from Lake Malawi are presented, the first long and continuous, high-fidelity records of tropical climate change from the continent itself, providing evidence for dramatically wetter conditions after 70 kyr ago. Expand
The environmental context for the origins of modern human diversity: a synthesis of regional variability in African climate 150,000-30,000 years ago.
TLDR
It is argued that at a continental scale, population and climate changes were asynchronous and likely occurred under different regimes of climate forcing, creating alternating opportunities for migration into adjacent regions, and strongly support the hypothesis of hominin occupation of the Sahara during discrete humid intervals ~135-115 ka and 105-75 ka. Expand
Lake level and paleoenvironmental history of Lake Tanganyika, Africa, as inferred from late Holocene and modern stromatolites
Fossil and living stromatolites are abundant around the margins of Lake Tanganyika, Africa, and provide a wealth of paleolimnologic and paleoclimatic information for the late Holocene. Six lines ofExpand
Abrupt change in tropical African climate linked to the bipolar seesaw over the past 55,000 years
[1] The tropics play a major role in global climate dynamics, and are vulnerable to future climate change. We present a record of East African climate since 55 ka, preserved in Lake Malawi sediments,Expand
...
1
2
3
4
5
...