scholarly journals Evidence for a ‘Medieval Warm Period’ in a 1,100 year tree-ring reconstruction of past austral summer temperatures in New Zealand

2002 ◽  
Vol 29 (14) ◽  
pp. 12-1-12-4 ◽  
Author(s):  
Edward R. Cook ◽  
Jonathan G. Palmer ◽  
Rosanne D. D'Arrigo
Keyword(s):  
New Zealand ◽  
Tree Ring ◽  
Austral Summer ◽  
Medieval Warm Period ◽  
Warm Period ◽  
Summer Temperatures ◽  
Tree Ring Reconstruction

Response of Siberian trees to climatic changes over the past 1500 years

2021 ◽  
Author(s):  
Olga Churakova (Sidorova) ◽  
Marina Fonti ◽  
Rolf Siegwolf ◽  
Tatyana Trushkina ◽  
Eugene Vaganov ◽  
...  
Keyword(s):  
Tree Ring ◽  
Ice Core ◽  
Climatic Changes ◽  
Medieval Warm Period ◽  
Warm Period ◽  
Taimyr Peninsula ◽  
Climate Conditions ◽  
Northeastern Part ◽  
The Past ◽  
Tree Ring Cellulose

<p>We use an interdisciplinary approach combining stable isotopes in tree rings, pollen data, ice cores from temperature-limited environment in the Siberian north and developed a comprehensive description of the climatic changes over the past 1500 years. We found that the Climatic Optimum Period was warmer and drier compared to the Medieval one, but rather similar to the recent period. Our results indicate that the Medieval Warm period in the Taimyr Peninsula started earlier and was wetter compared to the northeastern part of Siberia (northeastern Yakutia). Summer precipitation reconstruction obtained from carbon isotopes in tree-ring cellulose from Taimyr Peninsula significantly correlated with the pollen data of the Lama Lake (Andreev et al. 2004) and oxygen isotopes of the ice core from Severnaya Zemlya (Opel et al. 2013) recording wetter climate conditions during the Medieval Warm period compared to the northeastern part of Siberia. Common large-scale climate variability was confirmed by significant relationship between oxygen isotope data in tree-ring cellulose from the Taimyr Peninsula and northeastern Yakutia, and oxygen isotope ice core data from Severnaya Zemlja during the Medieval Warm period and the recent one. Finally, we showed that the recent warming on the Taimyr Peninsula is not unprecedented in the Siberian north. Similar climate conditions were recorded by stable isotopes in tree rings, pollen, and ice core data 6000 years ago. On the northeastern part of Siberia newly developed a 1500-year summer vapor pressure deficit (VPD) reconstruction showed, that VPD increased recently, but does not yet exceed the maximum values reconstructed during the Medieval Warm period. The most humid conditions in the northeastern part of Siberia were recorded in the Early Medieval period and during the Little Ice Age. However, the increasing VPD under elevated air temperature in the last decades affects the hydrological regime of these sensitive ecosystems by greater evapotranspiration rates. Further VPD increase will significantly affect Siberian forests most likely leading to drought even under additional access of thawed permafrost water.</p><p>This work was supported by the FP7-PEOPLE-IIF-2008 - Marie Curie Action: "International Incoming Fellowships" 235122 and "Reintegration Fellowships" 909122 “Climatic and environmental changes in the Eurasian Subarctic inferred from tree-ring and stable isotope chronologies for the past and recent periods” and the Government of Krasnoyarsk Kray and Russian Foundation for Basic Research and Krasnoyarsk Foundation 20-44-240001 “Adaptation of conifer forests on the north of the Krasnoyarsk region (Taimyr Peninsula) to climatic changes after extreme events over the past 1500 years“ awarded to Olga V. Churakova (Sidorova).</p>

Tree-ring reconstruction of late summer temperatures in northern Sikkim (eastern Himalayas)

2018 ◽  
Vol 504 ◽  
pp. 125-135 ◽  
Author(s):  
H.P. Borgaonkar ◽  
Naveen Gandhi ◽  
Somaru Ram ◽  
R. Krishnan
Keyword(s):  
Tree Ring ◽  
Late Summer ◽  
Eastern Himalayas ◽  
Summer Temperatures ◽  
Tree Ring Reconstruction

Tree-ring reconstructed rainfall over the southeastern U.S.A. during the medieval warm period and little ice age

1994 ◽  
Vol 26 (2-3) ◽  
pp. 199-212 ◽  
Author(s):  
David W. Stahle ◽  
Malcolm K. Cleaveland
Keyword(s):  
Tree Ring ◽  
Little Ice Age ◽  
Medieval Warm Period ◽  
Warm Period ◽  
Ice Age

scholarly journals Fennoscandia revisited: a spatially improved tree-ring reconstruction of summer temperatures for the last 900 years

2014 ◽  
Vol 45 (3-4) ◽  
pp. 933-947 ◽  
Author(s):  
Hans W. Linderholm ◽  
Jesper Björklund ◽  
Kristina Seftigen ◽  
Björn E. Gunnarson ◽  
Mauricio Fuentes
Keyword(s):  
Tree Ring ◽  
Summer Temperatures ◽  
Tree Ring Reconstruction

Climate change and tree-ring relationships of Nothofagus menziesii tree-line forests

2001 ◽  
Vol 31 (11) ◽  
pp. 1981-1991 ◽  
Author(s):  
Louise E Cullen ◽  
Jonathan G Palmer ◽  
Richard P Duncan ◽  
Glenn H Stewart
Keyword(s):  
New Zealand ◽  
Tree Ring ◽  
Climate Warming ◽  
Tree Growth ◽  
Natural Disturbance ◽  
Tree Line ◽  
Climatic Control ◽  
Influence Of Temperature On ◽  
Summer Temperatures ◽  
The Impact

To assess the sensitivity of New Zealand tree lines to climate warming, we compared the tree-ring growth characteristics and temperature relationships of silver beech (Nothofagus menziesii (Hook. f.) Oerst) at two elevations, ca. 1200 m (tree line) and ca. 1100 m. Modelled relationships between climate series and tree rings indicated that the main climatic control on tree growth was current summer temperatures. Nevertheless, temperatures during earlier seasons can influence tree growth, pointing to a complex relationship between radial growth and climate at tree line. Overall, the similarity in the growth–temperature relationships for trees at both elevations indicated that high-altitude N. menziesii forests should be useful for examining the impact of climate warming on tree growth. However, the level of common growth variation was greater in the below tree line chronologies, suggesting that other factors, including natural disturbance, may affect or compete with the influence of temperature on tree-ring growth at tree line. Despite the importance of summer temperatures for tree growth at or near tree line and the reported increase in summer temperatures since 1950 in New Zealand, ring widths have not increased in recent decades. We conclude, therefore, that in these N. menziesii tree-line forests there has been no detectable tree-ring growth response to climate warming.

B–Tm Ash of a Catastrophic Eruption of Baitoushan Volcano in Terrestrial Deposits of Primorye as an Age Marker of the Medieval Warm Period in the Holocene

2020 ◽  
Vol 494 (2) ◽  
pp. 779-786
Author(s):  
N. G. Razjigaeva ◽  
L. A. Ganzey ◽  
T. A. Grebennikova ◽  
L. M. Mokhova ◽  
Kh. A. Arslanov ◽  
...  
Keyword(s):  
Medieval Warm Period ◽  
Warm Period ◽  
The Holocene

Modulation of the relationship between summer temperatures in the Qinghai–Tibetan Plateau and Arctic over the past millennium by external forcings

2021 ◽  
pp. 1-9
Author(s):  
Feng Shi ◽  
Anmin Duan ◽  
Qiuzhen Yin ◽  
John T Bruun ◽  
Cunde Xiao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Global Climate ◽  
Volcanic Eruptions ◽  
Warm Period ◽  
Temperature Correlation ◽  
The Past ◽  
External Forcings ◽  
Centennial Variation ◽  
Summer Temperatures ◽  
Past Millennium

Abstract The Qinghai–Tibetan Plateau and Arctic both have an important influence on global climate, but the correlation between climate variations in these two regions remains unclear. Here we reconstructed and compared the summer temperature anomalies over the past 1,120 yr (900–2019 CE) in the Qinghai–Tibetan Plateau and Arctic. The temperature correlation during the past millennium in these two regions has a distinct centennial variation caused by volcanic eruptions. Furthermore, the abrupt weak-to-strong transition in the temperature correlation during the sixteenth century could be analogous to this type of transition during the Modern Warm Period. The former was forced by volcanic eruptions, while the latter was controlled by changes in greenhouse gases. This implies that anthropogenic, as opposed to natural, forcing has acted to amplify the teleconnection between the Qinghai–Tibetan Plateau and Arctic during the Modern Warm Period.

Sign in / Sign up

Export Citation Format

Share Document