The Impact of Climatic Conditions on Seasonal River Discharges in Siberia

Ye, Hengchun; Yang, Daqing; Zhang, Tingjun; Zhang, Xuebin; LaDochy, Steve; Ellison, Mark

doi:10.1175/1525-7541(2004)005<0286:tiocco>2.0.co;2

Cited by 60 publications

(45 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Peterson et al (2002) discovered that the average annual discharge of fresh water from the six largest Eurasian rivers to the Arctic Ocean increased by 7% from 1936 to 1999, and it is positively related with the NAO index. Ye et al (2004) also confirmed that there were significant lag correlations (P=0.05) between the river runoff in this area and NAO or climate in most seasons. By using the long series of data, Gong and Wang (1999) revealed the distinct contribution (17%) of NAO to the extratropical winter temperature in the past 120 years.…”

Section: Introductionsupporting

confidence: 67%

Association of North Atlantic Oscillations with Aksu River runoff in China

Jiang

Yang

2009

J. Geogr. Sci.

View full text Add to dashboard Cite

The relationship between North Atlantic Oscillations (NAO) and Aksu River Runoff (ARR) was investigated by using the wavelet transform (WT), cross wavelet transform (CWT), correlation and linear trend analyses, and abrupt change test. The main results are as follows: the interannual/decadal variation and period analyses of ARR and NAO reveal that the both were close correlated each other; the CWT indicates that the correlation was good between ARR and NAO at all periods in the 1990s, because the significant correlation areas mainly concentrated in the 1990s; the variations in the trend strength of ARR and NAO were consistent; the abrupt change of NAO was also temporally consistent with that of ARR, which exerted impact on the Aksu River Basin (ARB) climate and then the ARR through atmospheric circulation variation.

show abstract

Section: Introductionsupporting

confidence: 67%

Association of North Atlantic Oscillations with Aksu River runoff in China

Jiang

Yang

2009

J. Geogr. Sci.

View full text Add to dashboard Cite

show abstract

“…Zhang et al (2003) hypothesize that climateinduced changes to permafrost could lead to changes in both streamflow seasonality and annual volumes. Thickening of the active layer leads to an increase in liquid groundwater storage, while the delaying of active-layer freeze-up leads to the potential for subsurface water to contribute to streamflow into the winter (Serreze et al 2003a;Yang et al 2002;Ye et al 2004;Zhang et al 2003). Annual streamflow is augmented by the thawing and release of excess ground ice (Frauenfeld et al 2004;Zhang et al 2003).…”

Section: Permafrost Changesmentioning

confidence: 99%

Application of New Precipitation and Reconstructed Streamflow Products to Streamflow Trend Attribution in Northern Eurasia

Adam

Lettenmaier

2008

Journal of Climate

View full text Add to dashboard Cite

River runoff to the Arctic Ocean has increased over the last century, primarily during the winter and spring and primarily from the major Eurasian rivers. Some recent studies have suggested that the additional runoff is due to increased northward transport of atmospheric moisture (and associated increased precipitation), but other studies show inconsistencies in long-term runoff and precipitation trends, perhaps partly due to biases in the observational datasets. Through trend analysis of precipitation, temperature, and streamflow data, the authors investigate the extent to which Eurasian Arctic river discharge changes are attributable to precipitation and temperature changes as well as to reservoir construction and operation between the years of 1936 and 2000. Two new datasets are applied: a gridded precipitation product, in which the low-frequency variability is constrained to match that of long-term bias-corrected precipitation station data, and a reconstructed streamflow product, in which the effects of reservoirs have been minimized using a physically based reservoir model. It is found that reservoir operations have primarily affected streamflow seasonality, increasing winter discharge and decreasing summer discharge. To understand the influences of climate on streamflow changes, the authors hypothesize three cases that would cause precipitation trends to be inconsistent with streamflow trends: first, for the coldest basins in northeastern Siberia, streamflow should be sensitive to warming primarily as a result of the melting of excess ground ice, and for these basins positive streamflow trends may exceed precipitation trends in magnitude; second, evapotranspiration (ET) in the warmer regions of western Siberia and European Russia is sensitive to warming and increased precipitation, therefore observed precipitation trends may exceed streamflow trends; and third, streamflow from the central Siberian basins should respond to both effects. It is found that, in general, these hypotheses hold true. In the coldest basins, streamflow trends diverged from precipitation trends starting in the 1950s to 1960s, and this divergence accelerated thereafter. In the warmest basins, precipitation trends consistently exceeded streamflow trends, suggesting that increased precipitation contributed to increases in both ET and streamflow. In the central basins, permafrost degradation and ET effects appear to be contributing to long-term streamflow trends in varying degrees for each basin. The results herein suggest that the extent and state of the permafrost underlying a basin is a complicating factor in understanding long-term changes in Eurasian Arctic river discharge.

show abstract

“…Studies of snow-atmosphere interactions tend to focus on regional snow cover disappearance over the central Eurasian Continent, which has a significant negative correlation with the intensity of the Indian summer monsoon. In Eastern Siberia, which contains vast areas of permafrost, snow meltwater directly contributes to the runoff of large rivers (Ye et al, 2004) or evapotranspiration via soil moisture and boreal forest following snow disappearance (Ohta et al, 2001;Sugimoto et al, 2003). Thus, the timing of snow disappearance is also very important for understanding variations in both the basin-and continental-scale water cycle and the climate system of the neighboring region.…”

Section: Introductionmentioning

confidence: 99%

Snow disappearance in Eastern Siberia and its relationship to atmospheric influences

Iijima

Masuda

Ohata

2006

Intl Journal of Climatology

View full text Add to dashboard Cite

Abstract:In the present study, we examine the climatological features and interannual variations in snow disappearance within the Lena River Basin, Eastern Siberia, during a recent 15-year period (1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000), and the relationship of snow disappearance to atmospheric conditions. According to the climatology of the day of the year on which snow disappears, the boundary of snow disappearance within the Lena River Basin migrates rapidly northward from mid-April until early June, with minimum interannual variation occurring in the middle part of the basin. In addition, the preceding snow disappearance is apparent in the central Lena River Basin. Melting of snow within the Lena River Basin commonly occurs within 30 days of complete snow disappearance under certain atmospheric conditions: daily mean air temperature in excess of −10°C, greater than 2 hPa of water vapor pressure, and, hence, more than 170 W m −2 of downward longwave radiation under clear sky conditions. Composite analysis using a reanalysis dataset demonstrates that the increase in air temperature and water vapor that accompanies snow melting is due to wet (and warm) air advection in conjunction with enhanced water vapor convergence over the central Lena River Basin during the 30-day period prior to snow disappearance.

show abstract

The Impact of Climatic Conditions on Seasonal River Discharges in Siberia

Cited by 60 publications

References 30 publications

Association of North Atlantic Oscillations with Aksu River runoff in China

Association of North Atlantic Oscillations with Aksu River runoff in China

Application of New Precipitation and Reconstructed Streamflow Products to Streamflow Trend Attribution in Northern Eurasia

Snow disappearance in Eastern Siberia and its relationship to atmospheric influences

Contact Info

Product

Resources

About