Chemical traits of tree-rings are sparsely used for dendroclimatic analysis. The difficulty of the laboratory process to obtain these proxies and understand their physiological relationship with meteorological variables have limited the development of dendrochemistry in tropical forests. Here, we show the first Micro X-ray fluorescence (µXRF) time series of chemical elements from Cedrela fissilis trees growing in southern Brazilian Amazon. We assess the relationships among wood traits (wid...

Ring-width (RW) and Blue Intensity (BI) parameters (earlywood - EWB, inverted latewood – LWBinv, and delta - DB) were measured from samples of Araucaria araucana from six sites in northern Patagonia, Argentina. The distance between the most southerly and northerly sites is ca. 130 kms. Despite a much weaker between-tree signal for the BI parameters than RW, principal component analysis identifies a much stronger regional between-site signal for the BI parameters. Split period correlation r...

The impacts of inland flooding caused by tropical cyclones (TCs), including loss of life, infrastructure disruption, and alteration of natural landscapes, have increased over recent decades. While these impacts are well documented, changes in TC precipitation extremes—the proximate cause of such inland flooding—have been more difficult to detect. Here, we present a latewood tree-ring–based record of seasonal (June 1 through October 15) TC precipitation sums (ΣTCP) from the region in North ...

Global warming in boreal forests is more pronounced than elsewhere, as temperature is increasing twice as fast as the rest of the planet. Low water availability in some boreal forest stands is one of the numerous consequences of increasing temperature. Sites with coarse surficial deposits where water drains fast are more vulnerable to water stress, such as sites on esker fluvioglacial deposits. The eskers of the Abitibi region of Quebec (Canada) are valuable ecosystem for wood provision an...

The ongoing North American megadrought has persisted since the year 2000, and has been characterized by anomalously low amounts of winter and summer precipitation. The climate systems providing these seasonal precipitation regimes are distinct in their origins but overlapping in their geographic ranges. However, our understanding is still incomplete in how alternation in water resources influences forest growth and physiology during extreme and persistent drought, including whether replete...

"Little is known about the impact of volcanoes on trees from the Southern Hemisphere. In this study, we investigated whether volcanic signals could be identified in ring widths from eight dendrochronological species from New Zealand, using superposed epoch analysis. We found that most species are good recorders of volcanic dimming and that the magnitude and persistence of the post-event response can be broadly linked to plant life history traits - whether the species responds as a 'stress ...

We report on research to develop quantitative, annually resolved, multi-century, tree-ring reconstructions of streamflow for 12 interstate river systems in eight states (Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, and Virginia) in the South Atlantic Gulf Basin (AGB) of the southeastern United States.We used a nested principal components regression method to develop annually resolved tree-ring reconstructions of warm-season (March-October streamflo...

Drought, flooding, and hurricane activity disrupt the human and natural landscape throughout the southeastern United States. Instrumental records through the past century suggest that the patterns of these extreme events are changing through time, especially in relation to rising global temperatures. However, instrumental records before the industrial revolution are rare, thus proxy records like tree rings are useful for comparing climatological conditions before massive human modification...