Megadroughts in the Common Era and the Anthropocene

BI Cook, JE Smerdon, ER Cook, AP Williams… - Nature Reviews Earth & …, 2022 - nature.com
Exceptional drought events, known as megadroughts, have occurred on every continent
outside Antarctica over the past~ 2,000 years, causing major ecological and societal …

African hydroclimatic variability during the last 2000 years

DJ Nash, G De Cort, BM Chase, D Verschuren… - Quaternary Science …, 2016 - Elsevier
The African continent is characterised by a wide range of hydroclimate regimes, ranging
from humid equatorial West Africa to the arid deserts in the northern and southern …

Recent summer precipitation trends in the Greater Horn of Africa and the emerging role of Indian Ocean sea surface temperature

AP Williams, C Funk, J Michaelsen, SA Rauscher… - Climate dynamics, 2012 - Springer
We utilize a variety of climate datasets to examine impacts of two mechanisms on
precipitation in the Greater Horn of Africa (GHA) during northern-hemisphere summer. First …

Comparing proxy and model estimates of hydroclimate variability and change over the Common Era

PAGES Hydro2k Consortium - Climate of the Past, 2017 - cp.copernicus.org
Water availability is fundamental to societies and ecosystems, but our understanding of
variations in hydroclimate (including extreme events, flooding, and decadal periods of …

Potential of tree-ring analysis in a wet tropical forest: a case study on 22 commercial tree species in Central Africa

P Groenendijk, U Sass-Klaassen, F Bongers… - Forest Ecology and …, 2014 - Elsevier
Implementing sustainable forest management requires basic information on growth, ages,
reproduction and survival of exploited tree species. This information is generally derived …

[HTML][HTML] Opportunities and applications of dendrochronology in Africa

A Gebrekirstos, A Bräuning, U Sass-Klassen… - Current Opinion in …, 2014 - Elsevier
Highlights•Trees in Africa may form annual rings and grow to multicentury
age.•Dendroecology helps to reconstruct climate trends and atmospheric circulation …

Trends in tree growth and intrinsic water-use efficiency in the tropics under elevated CO2 and climate change

M Rahman, M Islam, A Gebrekirstos, A Bräuning - Trees, 2019 - Springer
Key message Increasing water-use efficiency, due to rising atmospheric CO 2, did not
stimulate radial growth in tropical trees, probably because negative impacts of changing …

Changes in atmospheric circulation and the Arctic Oscillation preserved within a millennial length reconstruction of summer cloud cover from northern Fennoscandia

GHF Young, D McCarroll, NJ Loader, MH Gagen… - Climate dynamics, 2012 - Springer
Cloud cover currently represents the single greatest source of uncertainty in General
Circulation Models. Stable carbon isotope ratios (δ 13 C) from tree-rings, in areas of low …

Multi‐century tree‐ring precipitation record reveals increasing frequency of extreme dry events in the upper Blue Nile River catchment

M Mokria, A Gebrekirstos, A Abiyu… - Global Change …, 2017 - Wiley Online Library
Climate‐related environmental and humanitarian crisis are important challenges in the
Great Horn of Africa (GHA). In the absence of long‐term past climate records in the region …

Dendrochronology in the dry tropics: the Ethiopian case

THG Wils, UGW Sass-Klaassen, Z Eshetu, A Bräuning… - Trees, 2011 - Springer
Dendrochronology is developing outside temperate and boreal regions. Over the past
decade substantial progress has been made in Mediterranean and wet tropical regions …