Max C.A. Torbenson

Max C.A. Torbenson
Johannes Gutenberg-Universität Mainz | JGU · Institute of Geography

Ph.D.

About

28
Publications
11,384
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
467
Citations
Citations since 2016
24 Research Items
455 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
Additional affiliations
June 2019 - June 2021
The Ohio State University
Position
  • PostDoc Position
July 2014 - June 2019
University of Arkansas
Position
  • Research Assistant
August 2011 - January 2014
University of Minnesota Twin Cities
Position
  • Research/Teaching Assistant
Education
July 2014 - June 2019
University of Arkansas
Field of study
  • Geosciences
August 2011 - January 2014
September 2008 - June 2011
Queen's University Belfast
Field of study
  • Archaeology and Paleoecology

Publications

Publications (28)
Article
Full-text available
Land-surface feedbacks impart a significant degree of persistence between cool and warm season moisture availability in the central United States. However, the degree of correlation between these two variables is subject to major changes that appear to occur on decadal to multidecadal time scales, even in the relatively short 115-year instrumental...
Article
Full-text available
Paleoclimatic perspectives on hydrological variability can offer valuable information on the frequency and magnitude of extreme events. Tree‐ring records are a common proxy used to reconstruct past streamflow due to their interannual resolution and often strong correlation with hydroclimate variability. The separation of streamflow into theoretical...
Article
Full-text available
Season-to-season persistence of soil moisture drought varies across North America. Such interseasonal autocorrelation can have modest skill in forecasting future conditions several months in advance. Because robust instrumental observations of precipitation span less than 100 years, the temporal stability of the relationship between seasonal moistu...
Article
Although tree-ring stable carbon (δ¹³C) and oxygen (δ¹⁸O) isotopes are increasingly used for climate reconstructions, it remains unclear whether isotopic ratios from the two chemical elements and different tree species exhibit age-related trends that require removal prior to any paleoclimatic interpretation. Here, we present 2,355 δ¹³C and 2,237 δ¹...
Article
Full-text available
We present four reconstruction estimates of Arkansas River baseflow and streamflow using a total of 78 tree‐ring chronologies for three streamflow gages, geographically spanning the headwaters in Colorado to near the confluence of the Arkansas‐Mississippi rivers. The estimates represent different seasonal windows, which are dictated by the shared l...
Preprint
Full-text available
The El Niño Southern Oscillation (ENSO) teleconnection pattern drives interannual changes in winter precipitation across western North America, but these effects are entangled with orographic effects, caused by mountainous terrain, and long-term climate trends. This study employs a novel, spatially distributed non-linear spline model to isolate ENS...
Article
Linked to major volcanic eruptions around 536 and 540 CE, the onset of the Late Antique Little Ice Age has been described as the coldest period of the past two millennia. The exact timing and spatial extent of this exceptional cold phase are, however, still under debate because of the limited resolution and geographical distribution of the availabl...
Article
Two hundred years after von Humboldt's pioneering work on the upper treeline, and many fundamental studies thereafter, the rate of past elevational changes in one of the most fascinating biogeographic boundaries on our planet remains poorly understood. Here, we distinguish conceptually between realised and potential treeline positions and present a...
Preprint
Full-text available
There are indications that the reference climatology underlying meteorological drought has shown non-stationarity at seasonal, decadal, and centennial time scales, impacting the interpretation of normalized drought indices and potentially producing serious ecological, economic, and social consequences. Analyzing these trends in the meteorological d...
Article
Full-text available
Interannual variability in the global land carbon sink is strongly related to variations in tropical temperature and rainfall. This association suggests an important role for moisture-driven fluctuations in tropical vegetation productivity, but empirical evidence to quantify the responsible ecological processes is missing. Such evidence can be obta...
Article
Latewood width tree‐ring chronologies from arid‐site conifers in the southwestern United States are correlated with precipitation during portions of the summer monsoon season. The onset date and length of the monsoon season varies across the region, and these regional differences in summer rainfall climatology may impact the strength and timing of...
Article
Full-text available
Rainfall and river levels in the Amazon are associated with significant precipitation anomalies of opposite sign in temperate North and South America, which is the dominant mode of precipitation variability in the Americas that often arises during extremes of the El Niño/Southern Oscillation (ENSO). This co-variability of precipitation extremes acr...
Article
Full-text available
Instrumental observations indicate that Amazon precipitation and streamflow extremes have increased during the last 40‐years, possibly due to anthropogenic changes and natural variability. How unprecedented these changes might be is difficult to determine because some paleoclimatic, instrumental, and climate model simulations suggest that Amazonian...
Article
Full-text available
Cool and warm season precipitation totals have been reconstructed on a gridded basis for North America using 439 tree-ring chronologies correlated with December-April totals and 547 different chronologies correlated with May-July totals. These discrete seasonal chronologies are not significantly correlated with the alternate season and the December...
Presentation
Record rainfall totals have recently been recorded over the Amazon Basin and may be part of an amplified cycle of wet to dry season precipitation and streamflow. Just how unprecedented these recent hydroclimatic changes might be in the context of natural climate variability over the Amazon is difficult to determine from the short, sparse, and often...
Article
Full-text available
Bald cypress trees over 2,000-years old have been discovered in the forested wetlands along Black River using dendrochronology and radiocarbon dating. The oldest bald cypress yet documented is at least 2,624-years old, making Taxodium distichum the oldest-known wetland tree species, the oldest living trees in eastern North America, and the fifth ol...
Article
Full-text available
The teleconnection of the El Niño/Southern Oscillation (ENSO) to instrumental precipitation and temperature during the cool season over North America is strongest and most temporally stable in the TexMex sector of northern Mexico and the borderlands of southwestern United States. The ENSO impact on North American hydroclimate expands and contracts...
Article
Full-text available
The Amazon basin is a global center of hydroclimatic variability and biodiversity, but there are only eight instrumental rainfall stations with continuous records longer than 80 years in the entire basin, an area nearly the size of the coterminous US. The first long moisture-sensitive tree-ring chronology has been developed in the eastern equatoria...
Article
The São Francisco River basin is one of the most drought-prone regions of Brazil. Seasonally dry tropical forests (SDTF) are widely distributed in the basin and we developed a short chronology of Cedrela fissilis annual ring widths from SDTF fragments based on 89 cores from 44 trees dating from 1961 to 2015. The average correlation among all radii...
Article
Moisture sensitive tree-ring chronologies of Centrolobium microchaete have been developed from seasonally dry forests in the southern Amazon basin and used to reconstruct wet season rainfall totals from 1799-2012, adding over 150-years of rainfall estimates to the short instrumental record for the region. The reconstruction is correlated with the s...
Article
Full-text available
The relationship between earlywood width (EW) and latewood width (LW) is investigated using 197 tree-ring collections representing several tree species from across the North American continent. Chronologies of LW have limited paleoclimate value when they have low variance or very high correlation with EW from the same site. The correlation of LW an...
Poster
Full-text available
The genus Cedrela is found in seasonally dry forests formations from the Neotropics. During the dry season C. odorata and C. fissilis are deciduous and in favorable settings form well-defined semi-ring porous annual rings that can be exactly crossdated and used for chronology development and climate reconstruction. Shallow root system present in th...
Article
Full-text available
The Greenland Ice Core Chronology 2005 (GICC05) and the radiocarbon calibration curve (IntCal) are the foremost time scales used in paleoclimatic and paleoenvironmental studies of the most recent 10 k.y. Due to varying and often insufficient dating resolution, opportunities to test the synchrony of these two influential chronologies are rare. Here...
Chapter
Full-text available
Article
Full-text available
As the largest body of water on the northern Great Plains of North America, Lake Winnipeg in central Manitoba, Canada, is crucial to the region’s hydrology, economy, and society. Previous research identified exposed subfossil stumps at several locations along the shore in both the lake’s north and south basins, and interpreted them as evidence of l...
Article
Full-text available
We present a synthesis of locally absent (or “missing”) growth rings across the Northern Hemisphere based on 2359 publicly available tree ring-width records. During the last millennium, widespread absent rings have been observed only in the southwestern United States and were associated with severe drought. Absent rings were uncommon during the gro...

Network

Cited By

Projects

Project (1)
Project
This research project aims to reconstruct the hydroclimatic variability and atmospheric and oceanic processes involved in the Brazilian semiarid region inserted in the São Francisco Basin, and the influence of these phenomena on seasonally dry forests. Samples will include cross sections and cores extracted from Cedrela fissilis Vell. tree species. Sample preparation, ring count, cross-dating and measurement of the tree rings will be carried out according to standard procedures. Climate correlation analyses will be performed using data from the Instituto Nacional de Meteorologia and the Climate Research Unit data base. Sea surface temperature data from the Hadley Center will be used to study the atmospheric and oceanic processes influencing tree-growth in the study area. Growth-climate correlations will be obtained through response functions. We hope to demonstrate the synchronization of xylem formation on C. fissilis and climate and understand the impacts of climate variability on vegetation and population living in a drought-prone area.