State of the Climate: National Climate Report
This report provides a comprehensive overview of the climate in the United States by month, including data on precipitation, drought, and temperature and how it compares to national averages. Read More →
Twentieth-Century Hydroclimate Changes Consistent with Human Influence
This study reconstructs the Palmer drought severity index obtained with data from tree rings, demonstrating that human activities were probably affecting the worldwide risk of droughts as early as the beginning of the twentieth century. Read More →
Deadly Weather: The Human Cost of 2018’s Climate Disasters — Visual Guide
This article describes the climate disasters that the world experienced in 2018 by month, including extreme temperatures in Europe, drought in Argentina, flooding in India, and hurricanes and wildfires in the United States.Read More →
A Multimethod Attribution Analysis of the Prolonged Northeast Brazil Hydrometeorological Drought (2012–16)
Northeast Brazil experienced profound water shortages in 2016 due to a five-year drought. Using multiple methods, the article could not find sufficient evidence that anthropogenic climate change increased drought risk.Read More →
Future Changes in Event Attribution Methodologies
This report covers a range of events, including rain storms, droughts, tropical storms, and wildfires, as well as heat waves. Read More →
Anthropogenic Intensification of Southern African Flash Droughts as Exemplified by the 2015/16 Season
Flash drought over southern Africa was tripled during the last 60 years mainly due to anthropogenic climate change, and it was intensified during 2015/16 in the midst of heat waves.Read More →
The 2014 Drought in the Horn of Africa: Attribution of Meteorological Drivers
Ensemble modeling of the East African 2014 long rains season suggests no anthropogenic influence on the likelihood of low rainfall but clear signals in other drivers of drought.Read More →
Anthropogenic Warming Has Increased Drought Risk in California
This study finds that precipitation deficits in California were more than twice as likely to yield drought years if they occurred when conditions were warm. Read More →
Causes of the Extreme Dry Conditions Over California During Early 2013
The 2013 SST anomalies produced a predilection for California drought, whereas the longterm warming trend appears to make no appreciable contribution because of the counteraction between its dynamical and thermodynamic effects. Read More →
The Extraordinary California Drought of 2013-2014: Character, Context, and the Role of Climate Change
California’s driest 12-month period on record occurred during 2013/14, and while global warming likely increased the probability of certain large-scale atmospheric conditions, implications for very low precipitation in California remain uncertain. Read More →