Josef P. Werne

University of Pittsburgh

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Jaap S. Sinninghe Damsté

Utrecht University

Erik T. Brown

University of Minnesota, Duluth

Peter J. Fawcett

University of New Mexico

Stefan Schouten

Royal Netherlands Institute for Sea Research

Thomas C. Johnson

North Carolina Wildlife Resources Commission

R. Scott Anderson

Northern Arizona University

Molly D. O’Beirne

University of Pittsburgh

Mona Stockhecke

Swiss Federal Institute of Aquatic Science and Technology

Melissa A. Berke

University of Notre Dame

Sergio Contreras

Universidad Católica de la Santísima Concepción

Cooperative Institutions

University of Minnesota, Duluth

Planetary Science Institute

Centre National de la Recherche Scientifique

Chinese Academy of Sciences

Universidad Nacional Autónoma de México

University of Minnesota

Utrecht University

Royal Netherlands Institute for Sea Research

University of Pittsburgh

Woods Hole Oceanographic Institution

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

PRELIMINARY CHRONOLOGY OF THE STONEMAN LAKE, AZ SEDIMENT CORES: RADIOCARBON, TEPHROCHRONOLOGY AND MAGNETIC STRATIGRAPHY

Abstracts with programs - Geological Society of America (2018)

Peter J. Fawcett R. Scott Anderson Spencer E. Staley Erik T. Brown Michael Petronis

Chronology

Tephrochronology

10.1130/abs/2018rm-314131

Cite

Citations (2)

A leaf wax hydrogen isotope record of paleoprecipitation from Lake Chalco, Mexico

AGU Fall Meeting Abstracts (2019)

Anguai Lei Josef P. Werne

Hydrogen isotope

Source

Cite

Citations (0)

Large temperature variability in the southern African tropics since the Last Glacial Maximum

Geophysical Research Letters (2005)

Lindsay A. Powers Thomas C. Johnson Josef P. Werne Isla S. Castañeda Ellen C. Hopmans

The role of the tropics in global climate change is actively debated, particularly in regard to the timing and magnitude of thermal and hydrological response. Continuous, high‐resolution temperature records through the Last Glacial Maximum (LGM) from tropical oceans have provided much insight but surface temperature reconstructions do not exist from tropical continental environments. Here we used the TEX 86 paleotemperature proxy to reconstruct mean annual lake surface temperatures through the Last Glacial Maximum (LGM) in Lake Malawi, East Africa (9°–14°S). We find a ∼3.5°C overall warming since the LGM, with temperature reversals of ∼2°C during the Younger Dryas (12.5 ka BP) and at 8.2 ka BP. Maximum Holocene temperatures of ∼29°C were found at 5 ka BP, a period preceding severe drought in Africa. These results suggest a substantial thermal response of southeastern tropical Africa to deglaciation and to varying conditions during the Holocene.

Deglaciation

Last Glacial Maximum

Paleoclimatology

Proxy (statistics)

Tropical climate

10.1029/2004gl022014

Cite

Citations (185)

Wet and arid phases in the southeast African tropics since the Last Glacial Maximum

Geology (2007)

Isla S. Castañeda Josef P. Werne Thomas C. Johnson

Research Article| September 01, 2007 Wet and arid phases in the southeast African tropics since the Last Glacial Maximum Isla S. Castañeda; Isla S. Castañeda 1Large Lakes Observatory, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Search for other works by this author on: GSW Google Scholar Josef P. Werne; Josef P. Werne 2Large Lakes Observatory and Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Search for other works by this author on: GSW Google Scholar Thomas C. Johnson Thomas C. Johnson 3Large Lakes Observatory and Department of Geological Sciences, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Isla S. Castañeda 1Large Lakes Observatory, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Josef P. Werne 2Large Lakes Observatory and Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Thomas C. Johnson 3Large Lakes Observatory and Department of Geological Sciences, University of Minnesota Duluth, Duluth, Minnesota 55812, USA Publisher: Geological Society of America Received: 22 Mar 2007 Revision Received: 26 Apr 2007 Accepted: 01 May 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (9): 823–826. https://doi.org/10.1130/G23916A.1 Article history Received: 22 Mar 2007 Revision Received: 26 Apr 2007 Accepted: 01 May 2007 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Isla S. Castañeda, Josef P. Werne, Thomas C. Johnson; Wet and arid phases in the southeast African tropics since the Last Glacial Maximum. Geology 2007;; 35 (9): 823–826. doi: https://doi.org/10.1130/G23916A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Plant leaf wax carbon isotopes provide a record of C3 versus C4 vegetation, a sensitive indicator of aridity, from the southeast African tropics since the Last Glacial Maximum. Wet and arid phases in southeast Africa were in phase with conditions in the global tropics from 23 to 11 ka, but at the start of the Holocene these relationships ended and an antiphase relationship prevailed. The abrupt switch from in phase to out of phase conditions may partially be attributed to a southward displacement of the Intertropical Convergence Zone (ITCZ) during the last glacial. Southward displacements of the ITCZ are also linked to arid conditions in southeast Africa during the Younger Dryas and the Little Ice Age. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Geological survey

10.1130/g23916a.1

Cite

Citations (117)

Fecal stanol ratios indicate shifts in camelid pastoralism in the highlands of Peru across a 4,000-year lacustrine sequence

Quaternary Science Reviews (2021)

T. Elliott Arnold Aubrey L. Hillman Steven J. McGrath Mark B. Abbott Josef P. Werne

Before Present

10.1016/j.quascirev.2021.107193

Cite

Citations (8)

An investigation of size-fractionated organic matter from Lake Superior and a tributary stream using radiocarbon, stable isotopes and NMR