No evidence for globally coherent warm and cold periods over the preindustrial Common Era

  title={No evidence for globally coherent warm and cold periods over the preindustrial Common Era},
  author={Raphael Neukom and Nathan J. Steiger and Juan Jos{\'e} G{\'o}mez-Navarro and Jianghao Wang and Johannes P. Werner},
Earth’s climate history is often understood by breaking it down into constituent climatic epochs1. Over the Common Era (the past 2,000 years) these epochs, such as the Little Ice Age2–4, have been characterized as having occurred at the same time across extensive spatial scales5. Although the rapid global warming seen in observations over the past 150 years does show nearly global coherence6, the spatiotemporal coherence of climate epochs earlier in the Common Era has yet to be robustly tested… 
Prominent role of volcanism in Common Era climate variability and human history
Global tree-ring response and inferred climate variation following the mid-thirteenth century Samalas eruption
The largest explosive volcanic eruption of the Common Era in terms of estimated sulphur yield to the stratosphere was identified in glaciochemical records 40 years ago, and dates to the
Climate Variability in Central Europe during the Last 2500 Years Reconstructed from Four High-Resolution Multi-Proxy Speleothem Records
The Late Holocene was characterized by several centennial-scale climate oscillations including the Roman Warm Period, the Dark Ages Cold Period, the Medieval Warm Period and the Little Ice Age. The
A decade of cold Eurasian winters reconstructed for the early 19th century
Annual-to-decadal variability in northern midlatitude temperature is dominated by the cold season. However, climate field reconstructions are often based on tree rings that represent the growing
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada
Abstract Climate changes over the past two millennia in the central part of the Gulf of St. Lawrence are documented in this paper with the aim of determining and understanding the natural climate
Ozone-aerosol and land use reversed temperature increase over some northern mid-latitude regions between the 20th century and the Little Ice Age based on the CESM-LME
Global warming is a widely concerned topic, and the surface temperature has shown an accelerated warming trend during the past several decades. From the perspective of a longer time scale, the 20th
Aleutian Low variability for the last 7500 years and its relation to the Westerly Jet
Abstract The Aleutian Low (AL) is one of the major atmospheric systems that determines environmental conditions during winter in the North Pacific Ocean, with impacts that affect the climates of both
The Long‐Term Cooling Trend in East Antarctic Plateau Over the Past 2000 Years Is Only Robust Between 550 and 1550 CE
  • C. AnS. Hou Bo Sun
  • Environmental Science, Geography
    Geophysical Research Letters
  • 2021
The uncertainties in Antarctic climate reconstructions due to scarcity of proxy records have restricted the understanding of mechanisms of climate change, and further hindered the improvement of
Reconstructing Holocene temperatures in time and space using paleoclimate data assimilation
, Abstract. Paleoclimatic records provide valuable information about Holocene climate, revealing aspects of climate variability for a multitude of sites around the world. However, such data also


Continental-scale temperature variability during the past two millennia
Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to
Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly
The Medieval period is found to display warmth that matches or exceeds that of the past decade in some regions, but which falls well below recent levels globally, and the Little Ice Age is marked by a tendency for La Niña–like conditions in the tropical Pacific.
Inter-hemispheric temperature variability over the past millennium
The Earth’s climate system is driven by a complex interplay of internal chaotic dynamics and natural and anthropogenic external forcing. Recent instrumental data have shown a remarkable degree of
A new reconstruction of temperature variability in the extra‐tropical northern hemisphere during the last two millennia
Abstract. A new temperature reconstruction with decadal resolution, covering the last two millennia, is presented for the extratropical Northern Hemisphere (90–30°N), utilizing many
Cooling and societal change during the Late Antique Little Ice Age from 536 to around 660 AD
Societal upheaval occurred across Eurasia in the sixth and seventh centuries. Tree-ring reconstructions suggest a period of pronounced cooling during this time associated with several volcanic
Early onset of industrial-era warming across the oceans and continents
The findings imply that instrumental records are too short to comprehensively assess anthropogenic climate change and that, in some regions, about 180 years of industrial-era warming has already caused surface temperatures to emerge above pre-industrial values, even when taking natural variability into account.
Last Millennium Climate and Its Variability in CCSM4
AbstractAn overview of a simulation referred to as the “Last Millennium” (LM) simulation of the Community Climate System Model, version 4 (CCSM4), is presented. The CCSM4 LM simulation reproduces
The early 20th century warming: Anomalies, causes, and consequences
The most pronounced warming in the historical global climate record prior to the recent warming occurred over the first half of the 20th century and is known as the Early Twentieth Century Warming (ETCW), and the observed changes during the ETCW are discussed.
A global multiproxy database for temperature reconstructions of the Common Era
  • Julien Nicholas P. Darrell S. Lucien Jianghao Kevin J. Ne Emile-Geay McKay Kaufman von Gunten Wang AnchukaitJ. Emile‐Geay J. Zinke
  • Environmental Science, Geography
    Scientific data
  • 2017
A community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative, suited to investigations of global and regional temperature variability over the Common Era, and is shared in the Linked Paleo Data (LiPD) format, including serializations in Matlab, R and Python.
Dark Ages Cold Period: A literature review and directions for future research
Several late Quaternary studies have recorded cold and disturbed climates centred during the mid-first millennium AD and discussed these conditions under the term ‘Dark Ages Cold Period’ (DACP). A