Recent temperature and precipitation increases in West Siberia and their association with the Arctic Oscillation
Open Access
- 1 December 2003
- journal article
- Published by Norwegian Polar Institute in Polar Research
- Vol. 22 (2), 287-300
- https://doi.org/10.1111/j.1751-8369.2003.tb00113.x
Abstract
Surface air temperature and precipitation records for the years 1958-1999 from ten meteorological stations located throughout West Siberia are used to identify climatic trends and determine to what extent these trends are potentially attributable to the Arctic Oscillation (AO). Although recent changes in atmospheric variability are associated with broad Arctic climate change, West Siberia appears particularly susceptible to warming. Furthermore, unlike most of the Arctic, moisture transport in the region is highly variable. The records show that West Siberia is experiencing significant warming and notable increases in precipitation, likely driven, in part, by large-scale Arctic atmospheric variability. Because this region contains a large percentage of the world's peatlands and contributes a significant portion of the total terrestrial freshwater flux to the Arctic Ocean, these recent climatic trends may have globally significant repercussions. The most robust patterns found are strong and prevalent springtime warming, winter precipitation increases, and strong association of non-summer air temperatures with the AO. Warming rates for both spring (0.5-0.8 °C/decade) and annual (0.3-0.5°C/decade) records are statistically significant for nine often stations. On average, the AO is linearly congruent with 96% (winter), 19% (spring), 0% (summer), 67% (autumn) and 53% (annual) of the warming found in this study. Significant trends in precipitation occur most commonly during winter, when four of ten stations exhibit significant increases (4-13 %/decade). The AO may play a lesser role in precipitation variability and is linearly congruent with only 17% (winter), 13% (spring), 12% (summer), 1% (autumn) and 26% (annual) of precipitation trends.Keywords
This publication has 73 references indexed in Scilit:
- East Asian Winter Monsoon and Arctic OscillationGeophysical Research Letters, 2001
- On the teleconnectivity of the “Arctic Oscillation”Geophysical Research Letters, 2000
- Seasonal patterns and controls on net ecosystem CO2 exchange in a boreal peatland complexGlobal Biogeochemical Cycles, 1998
- The Arctic Oscillation signature in the wintertime geopotential height and temperature fieldsGeophysical Research Letters, 1998
- Methane fluxes on boreal peatlands of different fertility and the effect of long‐term experimental lowering of the water table on flux ratesGlobal Biogeochemical Cycles, 1998
- Variations of mean cold season temperature, precipitation and snow depths during the last 100 years in the former Soviet Union (FSU)Hydrological Sciences Journal, 1997
- Recent decreases in Arctic summer ice cover and linkages to atmospheric circulation anomaliesGeophysical Research Letters, 1996
- Ecological controls on methane emissions from a Northern Peatland Complex in the zone of discontinuous permafrost, Manitoba, CanadaGlobal Biogeochemical Cycles, 1995
- Atlantic Arctic cyclones and the mild Siberian winters of the 1980sGeophysical Research Letters, 1995
- Carbon pools and accumulation in peatlands of the former Soviet UnionGlobal Biogeochemical Cycles, 1995