English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. River discharges from Siberia are a large source of freshwater into theArctic Ocean, whereas the cause of the long-term variation in Siberiandischarges is still unclear. The observed river discharges of the Lena in theeast and the Ob in the west indicated different relationships in each of theepochs during the past 7 decades. The correlations between the two riverdischarges were negative during the 1980s to mid-1990s, positive during themid-1950s to 1960s, and became weak after the mid-1990s. More long-termrecords of tree-ring-reconstructed discharges have also shown differences inthe correlations in each of the epochs. It is noteworthy that thecorrelations obtained from the reconstructions tend to be negative during thepast 2 centuries. Such tendency has also been obtained from precipitationsin observations, and in simulations with an atmospheric general circulationmodel (AGCM) and fully coupled atmosphere–ocean GCMs conducted for theFourth Assessment Report of the IPCC. The AGCM control simulation furtherdemonstrated that an east–west seesaw pattern of summertime large-scaleatmospheric circulation frequently emerges over Siberia as an atmosphericinternal variability. This results in an opposite anomaly of precipitationover the Lena and Ob and the negative correlation. Consequently, thesummertime atmospheric internal variability in the east–west seesaw pattern overSiberia is a key factor influencing the long-term variation in precipitationand river discharge, i.e., the water cycle in this region.

Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries