Climatic history of the northeastern United States during the past 3000 years
AuthorMarlon, Jennifer R.
Bartlein, Patrick J.
Berke, Melissa A.
Dietze, Michael C.
Hubeny, J. Bradford
Jackson, Stephen T.
Mock, Cary J.
Moore, David J. P.
Williams, John W.
AffiliationUniv Arizona, Sch Nat Resources & Environm
Univ Arizona, Lab Tree Ring Res
MetadataShow full item record
PublisherCOPERNICUS GESELLSCHAFT MBH
CitationClimatic history of the northeastern United States during the past 3000 years 2017, 13 (10):1355 Climate of the Past
JournalClimate of the Past
Rights© Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractMany ecosystem processes that influence Earth system feedbacks – vegetation growth, water and nutrient cycling, disturbance regimes – are strongly influenced by multidecadal- to millennial-scale climate variations that cannot be directly observed. Paleoclimate records provide information about these variations, forming the basis of our understanding and modeling of them. Fossil pollen records are abundant in the NE US, but cannot simultaneously provide information about paleoclimate and past vegetation in a modeling context because this leads to circular logic. If pollen data are used to constrain past vegetation changes, then the remaining paleoclimate archives in the northeastern US (NE US) are quite limited. Nonetheless, a growing number of diverse reconstructions have been developed but have not yet been examined together. Here we conduct a systematic review, assessment, and comparison of paleotemperature and paleohydrological proxies from the NE US for the last 3000 years. Regional temperature reconstructions (primarily summer) show a long-term cooling trend (1000 BCE–1700 CE) consistent with hemispheric-scale reconstructions, while hydroclimate data show gradually wetter conditions through the present day. Multiple proxies suggest that a prolonged, widespread drought occurred between 550 and 750 CE. Dry conditions are also evident during the Medieval Climate Anomaly, which was warmer and drier than the Little Ice Age and drier than today. There is some evidence for an acceleration of the longer-term wetting trend in the NE US during the past century; coupled with an abrupt shift from decreasing to increasing temperatures in the past century, these changes could have wide-ranging implications for species distributions, ecosystem dynamics, and extreme weather events. More work is needed to gather paleoclimate data in the NE US to make inter-proxy comparisons and to improve estimates of uncertainty in reconstructions.
VersionFinal published version
SponsorsNSF [EF-1065732, EF-1241870, AGS-1304262, BCS-1437074]